fix: 部署脚本 worker health-cmd 中 $pid 未转义导致 staging 部署失败回滚

ci_staging_deploy.sh 开启 set -eu，worker 容器 --health-cmd 双引号内的
$pid 被外层部署脚本提前展开（pid 未定义）→ 'pid: parameter not set' →
worker 容器 docker run 失败 → 判定部署失败并自动回滚。

将 health-cmd 内 $pid 转义为 \$pid，使其透传到容器内由 healthcheck shell
展开（for pid in /proc/[0-9]*/cmdline）。回滚段(195行)与主部署段(504行)
两处一并修复。

🤖 Generated with [Claude Code](https://claude.com/claude-code)

alembic/versions/069_project_is_default_idempotent.py

@@ -0,0 +1,72 @@
+"""Projects is_default + partial unique index for idempotent default project (Issue #1775)
+
+Revision ID: 069_project_is_default
+Revises: 068_user_profile_completed
+Create Date: 2026-09-08
+
+背景：
+小程序端 getOrCreateDefaultProject 在重试/并发/前端重复调用下，
+仅靠应用层"先查再插"不保证幂等，会给同一用户重复创建默认项目。
+
+改动：
+1. projects 表新增 is_default 布尔列（默认 false）
+2. 部分唯一索引 uq_projects_owner_default：(owner_user_id) WHERE is_default = true
+   —— 保证每个用户至多一个默认项目
+3. 存量数据回填：把名为"默认项目"的存量项目按创建时间最早者标记为 is_default=true
+   （只标记不删除；存量重复项目的清理另行确认后单独执行）
+
+注意：部分唯一索引依赖 PostgreSQL，不支持 downgrade 到其他方言。
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "069_project_is_default"
+down_revision = "068_user_profile_completed"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # 1. 新增 is_default 列
+    op.add_column(
+        "projects",
+        sa.Column(
+            "is_default",
+            sa.Boolean(),
+            nullable=False,
+            server_default=sa.text("false"),
+        ),
+    )
+
+    # 2. 存量回填：每个拥有"默认项目"的用户，只把最早创建的那一个标记为默认。
+    #    用 ROW_NUMBER() 取每组第一条；非"默认项目"命名的项目不标记（保守，不动用户自建项目）。
+    op.execute("""
+        UPDATE projects p
+        SET is_default = true
+        WHERE p.id IN (
+            SELECT id FROM (
+                SELECT id,
+                       ROW_NUMBER() OVER (
+                           PARTITION BY owner_user_id
+                           ORDER BY created_at ASC, id ASC
+                       ) AS rn
+                FROM projects
+                WHERE name = '默认项目'
+            ) t
+            WHERE t.rn = 1
+        )
+        """)
+
+    # 3. 部分唯一索引：每用户至多一个默认项目（只约束 is_default = true 的行）
+    op.execute("""
+        CREATE UNIQUE INDEX uq_projects_owner_default
+        ON projects (owner_user_id)
+        WHERE is_default = true
+        """)
+
+
+def downgrade() -> None:
+    op.execute("DROP INDEX IF EXISTS uq_projects_owner_default")
+    op.drop_column("projects", "is_default")

alembic/versions/070_add_scripts_table.py

@@ -0,0 +1,48 @@
+"""Add scripts table for oral broadcast script library (Issue #1795)
+
+Revision ID: 070_add_scripts
+Revises: 069_project_is_default
+Create Date: 2026-09-08
+
+新建 scripts 表，支持口播文案 CRUD + 分段存储。
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "070_add_scripts"
+down_revision = "069_project_is_default"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "scripts",
+        sa.Column("id", sa.String(36), nullable=False),
+        sa.Column("user_id", sa.String(36), nullable=False),
+        sa.Column("title", sa.String(255), nullable=False),
+        sa.Column("content", sa.Text(), nullable=False, server_default=""),
+        sa.Column("segments", sa.JSON(), nullable=False, server_default="[]"),
+        sa.Column("tags", sa.JSON(), nullable=False, server_default="[]"),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            nullable=False,
+            server_default=sa.func.now(),
+        ),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            nullable=False,
+            server_default=sa.func.now(),
+        ),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("ix_scripts_user_id", "scripts", ["user_id"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_scripts_user_id", table_name="scripts")
+    op.drop_table("scripts")

alembic/versions/071_add_lipsync_jobs_table.py

@@ -0,0 +1,47 @@
+"""add lipsync jobs table
+
+Revision ID: 071_add_lipsync_jobs
+Revises: 070_add_scripts
+Create Date: 2026-09-08
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "071_add_lipsync_jobs"
+down_revision = "070_add_scripts"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "lipsync_jobs",
+        sa.Column("id", sa.String(36), primary_key=True),
+        sa.Column("user_id", sa.String(36), nullable=False, index=True),
+        sa.Column("project_id", sa.String(36), nullable=False, server_default=""),
+        sa.Column("video_url", sa.Text(), nullable=False),
+        sa.Column("audio_url", sa.Text(), nullable=False),
+        sa.Column("enable_video_loop", sa.Boolean(), nullable=False, server_default=sa.text("false")),
+        sa.Column("mediakit_task_id", sa.String(200), nullable=False, server_default="", index=True),
+        sa.Column("status", sa.String(20), nullable=False, server_default="pending", index=True),
+        sa.Column("output_video_url", sa.Text(), nullable=False, server_default=""),
+        sa.Column("output_duration", sa.Float(), nullable=False, server_default=sa.text("0.0")),
+        sa.Column("error_message", sa.Text(), nullable=False, server_default=""),
+        sa.Column("error_code", sa.String(100), nullable=False, server_default=""),
+        sa.Column("submitted_at", sa.DateTime(), nullable=True),
+        sa.Column("completed_at", sa.DateTime(), nullable=True),
+        sa.Column("created_at", sa.DateTime(), nullable=False, server_default=sa.func.now()),
+        sa.Column("updated_at", sa.DateTime(), nullable=False, server_default=sa.func.now()),
+    )
+    # 复合索引：用户 + 状态（列表查询常用）
+    op.create_index("ix_lipsync_jobs_user_status", "lipsync_jobs", ["user_id", "status"])
+    # 项目 + 用户（项目维度查询）
+    op.create_index("ix_lipsync_jobs_project_user", "lipsync_jobs", ["project_id", "user_id"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_lipsync_jobs_project_user", table_name="lipsync_jobs")
+    op.drop_index("ix_lipsync_jobs_user_status", table_name="lipsync_jobs")
+    op.drop_table("lipsync_jobs")

alembic/versions/072_add_ai_avatar_render_jobs_table.py

@@ -0,0 +1,48 @@
+"""add ai avatar render jobs table
+
+Revision ID: 072_add_ai_avatar_render
+Revises: 071_add_lipsync_jobs
+Create Date: 2026-09-09
+"""
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision = "072_add_ai_avatar_render"
+down_revision = "071_add_lipsync_jobs"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "ai_avatar_render_jobs",
+        sa.Column("id", sa.String(36), primary_key=True),
+        sa.Column("user_id", sa.String(36), nullable=False, index=True),
+        sa.Column("project_id", sa.String(36), nullable=False, server_default=""),
+        sa.Column("lipsync_job_id", sa.String(36), nullable=False),
+        sa.Column("script_id", sa.String(36), nullable=False),
+        sa.Column("b_roll_segments", sa.JSON(), nullable=False, server_default="[]"),
+        sa.Column("title_config", sa.JSON(), nullable=False, server_default="{}"),
+        sa.Column("cover_config", sa.JSON(), nullable=False, server_default="{}"),
+        sa.Column("status", sa.String(20), nullable=False, server_default="pending", index=True),
+        sa.Column("progress", sa.Integer(), nullable=False, server_default=sa.text("0")),
+        sa.Column("output_video_url", sa.Text(), nullable=False, server_default=""),
+        sa.Column("output_cover_url", sa.Text(), nullable=False, server_default=""),
+        sa.Column("output_duration", sa.Float(), nullable=False, server_default=sa.text("0.0")),
+        sa.Column("error_message", sa.Text(), nullable=False, server_default=""),
+        sa.Column("submitted_at", sa.DateTime(), nullable=True),
+        sa.Column("started_at", sa.DateTime(), nullable=True),
+        sa.Column("completed_at", sa.DateTime(), nullable=True),
+        sa.Column("created_at", sa.DateTime(), nullable=False, server_default=sa.func.now()),
+        sa.Column("updated_at", sa.DateTime(), nullable=False, server_default=sa.func.now()),
+    )
+    op.create_index("ix_ai_avatar_render_user_status", "ai_avatar_render_jobs", ["user_id", "status"])
+    op.create_index("ix_ai_avatar_render_project_user", "ai_avatar_render_jobs", ["project_id", "user_id"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_ai_avatar_render_project_user", table_name="ai_avatar_render_jobs")
+    op.drop_index("ix_ai_avatar_render_user_status", table_name="ai_avatar_render_jobs")
+    op.drop_table("ai_avatar_render_jobs")

apps/api/app/api/router.py

@@ -1,4 +1,5 @@
 from app.api.routes.ai import router as ai_router
+from app.api.routes.ai_avatar_render import router as ai_avatar_render_router
 from app.api.routes.asset_diagnosis import router as asset_diagnosis_router
 from app.api.routes.asset_libraries import router as asset_libraries_router
 from app.api.routes.assets import router as assets_router
@@ -11,10 +12,13 @@ from app.api.routes.feature_flags import router as feature_flags_router
 from app.api.routes.generation_cover import router as generation_cover_router
 from app.api.routes.generation_preview import router as generation_preview_router
 from app.api.routes.generation_tasks import router as generation_tasks_router
+from app.api.routes.generation_variant_plans import router as generation_variant_plans_router
 from app.api.routes.health import router as health_check_router
 from app.api.routes.ingest_jobs import router as ingest_jobs_router
 from app.api.routes.internal_render import router as internal_render_router
+from app.api.routes.lipsync import router as lipsync_router
 from app.api.routes.projects import router as projects_router
+from app.api.routes.scripts import router as scripts_router
 from app.api.routes.share import router as share_router
 from app.api.routes.subscription import router as subscription_router
 from app.api.routes.tags import router as tags_router
@@ -37,6 +41,11 @@ api_router.include_router(
     auth_router,
     tags=["Auth"],
 )
+api_router.include_router(
+    lipsync_router,
+    prefix="/lipsync",
+    tags=["Lipsync"],
+)
 api_router.include_router(
     projects_router,
     prefix="/projects",
@@ -99,6 +108,11 @@ api_router.include_router(
     prefix="/generation",
     tags=["Generation"],
 )
+api_router.include_router(
+    generation_variant_plans_router,
+    prefix="/generation",
+    tags=["Generation"],
+)
 api_router.include_router(
     generation_cover_router,
     prefix="/generation",
@@ -165,3 +179,13 @@ api_router.include_router(
     internal_render_router,
     tags=["Internal"],
 )
+api_router.include_router(
+    scripts_router,
+    prefix="/scripts",
+    tags=["ScriptLibrary"],
+)
+api_router.include_router(
+    ai_avatar_render_router,
+    prefix="/ai-avatar/render",
+    tags=["AI Avatar Render"],
+)

apps/api/app/api/routes/ai_avatar_render.py

@@ -0,0 +1,175 @@
+"""AI数字人渲染合成 API 路由 — #1798.
+
+接口：
+  POST   /api/v1/ai-avatar/render              提交渲染任务
+  GET    /api/v1/ai-avatar/render/jobs          任务列表
+  GET    /api/v1/ai-avatar/render/{job_id}      任务详情
+  POST   /api/v1/ai-avatar/render/{job_id}/cancel  取消任务
+  POST   /api/v1/ai-avatar/render/{job_id}/retry   重试失败任务
+"""
+
+from __future__ import annotations
+
+import logging
+
+from app.auth import AuthenticatedUser, get_current_user
+from app.dependencies import get_db_session
+from app.schemas.ai_avatar_render import (
+    AiAvatarRenderJobResponse,
+    CreateAiAvatarRenderRequest,
+)
+from app.services.ai_avatar_render_service import (
+    AiAvatarRenderError,
+    AiAvatarRenderService,
+)
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter()
+
+
+def _get_service(db: Session = Depends(get_db_session)) -> AiAvatarRenderService:
+    return AiAvatarRenderService(db)
+
+
+# ── POST / — 提交渲染任务 ────────────────────────────────────────────────
+
+
+@router.post("", response_model=AiAvatarRenderJobResponse, status_code=201)
+def create_render_job(
+    body: CreateAiAvatarRenderRequest,
+    current_user: AuthenticatedUser = Depends(get_current_user),
+    svc: AiAvatarRenderService = Depends(_get_service),
+):
+    """提交 AI 数字人渲染任务.
+
+    将对口型视频 + B-roll 素材 + 标题叠加 + 封面提取合成最终输出视频。
+    """
+    try:
+        job = svc.create_render_job(
+            user_id=current_user.id,
+            lipsync_job_id=body.lipsync_job_id,
+            script_id=body.script_id,
+            b_roll_segments=[s.model_dump() for s in body.b_roll_segments],
+            title_config=body.title_config,
+            cover_config=body.cover_config,
+            project_id=body.project_id,
+        )
+    except AiAvatarRenderError as exc:
+        status_map = {
+            "LipsyncJobNotFound": 404,
+            "LipsyncJobNotCompleted": 400,
+            "LipsyncJobNoOutput": 400,
+            "ScriptNotFound": 404,
+        }
+        raise HTTPException(
+            status_code=status_map.get(exc.code, 400),
+            detail={"code": exc.code, "message": str(exc)},
+        ) from exc
+
+    # 异步触发渲染
+    try:
+        from app.tasks.ai_avatar_render import execute_ai_avatar_render
+
+        execute_ai_avatar_render.delay(job.id)
+    except Exception:
+        logger.warning("Celery 任务提交失败，渲染任务已创建但未触发执行: %s", job.id)
+
+    return job
+
+
+# ── GET /jobs — 任务列表 ─────────────────────────────────────────────────
+
+
+@router.get("/jobs", response_model=dict)
+def list_render_jobs(
+    project_id: str = Query("", description="项目 ID 过滤"),
+    status: str = Query("", description="状态过滤"),
+    offset: int = Query(0, ge=0),
+    limit: int = Query(20, ge=1, le=100),
+    current_user: AuthenticatedUser = Depends(get_current_user),
+    svc: AiAvatarRenderService = Depends(_get_service),
+):
+    """获取 AI 数字人渲染任务列表."""
+    items, total = svc.list_render_jobs(
+        user_id=current_user.id,
+        project_id=project_id,
+        status=status,
+        offset=offset,
+        limit=limit,
+    )
+    return {
+        "items": [AiAvatarRenderJobResponse.model_validate(j) for j in items],
+        "total": total,
+        "offset": offset,
+        "limit": limit,
+    }
+
+
+# ── GET /{job_id} — 任务详情 ─────────────────────────────────────────────
+
+
+@router.get("/{job_id}", response_model=AiAvatarRenderJobResponse)
+def get_render_job(
+    job_id: str,
+    current_user: AuthenticatedUser = Depends(get_current_user),
+    svc: AiAvatarRenderService = Depends(_get_service),
+):
+    """获取渲染任务详情."""
+    job = svc.get_render_job(job_id, current_user.id)
+    if job is None:
+        raise HTTPException(status_code=404, detail="渲染任务不存在")
+    return job
+
+
+# ── POST /{job_id}/cancel — 取消任务 ─────────────────────────────────────
+
+
+@router.post("/{job_id}/cancel", response_model=AiAvatarRenderJobResponse)
+def cancel_render_job(
+    job_id: str,
+    current_user: AuthenticatedUser = Depends(get_current_user),
+    svc: AiAvatarRenderService = Depends(_get_service),
+):
+    """取消渲染任务（仅 pending 状态可取消）."""
+    job = svc.cancel_render_job(job_id, current_user.id)
+    if job is None:
+        raise HTTPException(status_code=404, detail="渲染任务不存在")
+    if job.status != "cancelled":
+        raise HTTPException(
+            status_code=400,
+            detail=f"任务状态 {job.status} 不可取消，仅 pending 可取消",
+        )
+    return job
+
+
+# ── POST /{job_id}/retry — 重试失败任务 ──────────────────────────────────
+
+
+@router.post("/{job_id}/retry", response_model=AiAvatarRenderJobResponse)
+def retry_render_job(
+    job_id: str,
+    current_user: AuthenticatedUser = Depends(get_current_user),
+    svc: AiAvatarRenderService = Depends(_get_service),
+):
+    """重试失败的渲染任务."""
+    job = svc.retry_render_job(job_id, current_user.id)
+    if job is None:
+        raise HTTPException(status_code=404, detail="渲染任务不存在")
+    if job.status != "pending":
+        raise HTTPException(
+            status_code=400,
+            detail=f"仅 failed 状态的任务可重试，当前状态: {job.status}",
+        )
+
+    # 重新触发渲染
+    try:
+        from app.tasks.ai_avatar_render import execute_ai_avatar_render
+
+        execute_ai_avatar_render.delay(job.id)
+    except Exception:
+        logger.warning("Celery 任务提交失败，重试任务已重置但未触发执行: %s", job.id)
+
+    return job

apps/api/app/api/routes/asset_libraries.py

@@ -20,7 +20,7 @@ from packages.application import (
     GetProjectUseCase,
     ListAssetLibrariesUseCase,
 )
-from packages.domain import AssetLibrary, AssetLibraryKind
+from packages.domain import AssetLibraryKind
 
 from ._helpers import check_project_access
 
@@ -120,30 +120,11 @@ def ensure_default_library(
 
     kind = AssetLibraryKind(request.kind)
 
-    # 查找该项目下同 kind 的素材库，返回第一个
-    existing = asset_library_repository.find_by_project(request.project_id)
-    for lib in existing:
-        if lib.kind == kind:
-            return _to_asset_library_response(lib)
-
-    # 不存在 → 自动创建
-    import uuid
-    from datetime import datetime, timezone
-
-    now = datetime.now(timezone.utc)
+    # Issue #1775: 幂等获取/创建——依赖唯一约束 uq_asset_libraries_project_kind，
+    # 并发创建冲突时回滚重查返回已有记录，不再依赖应用层"先查后插"，也不会 500。
     default_name = _DEFAULT_LIBRARY_NAMES.get(request.kind, f"{request.kind}素材库")
-    library = AssetLibrary(
-        id=str(uuid.uuid4()),
-        project_id=request.project_id,
-        name=default_name,
-        kind=kind,
-        asset_count=0,
-        total_size=0,
-        created_at=now,
-        updated_at=now,
-    )
-    created = asset_library_repository.create(library)
-    return _to_asset_library_response(created)
+    library = asset_library_repository.get_or_create_default_library(request.project_id, kind, name=default_name)
+    return _to_asset_library_response(library)
 
 
 @router.delete("/{library_id}", status_code=status.HTTP_204_NO_CONTENT, response_class=Response)

apps/api/app/api/routes/generation_cover.py

@@ -75,6 +75,86 @@ class GenerateCoverResponse(BaseModel):
 # ── Route ────────────────────────────────────────────────────────────────
 
 
+
+def _select_best_frame_from_snapshots(
+    snapshots: list[dict], plan_id: str
+) -> str:
+    """从 MediaKit 抽帧结果中，通过质量评分选出最佳帧。
+
+    降级策略：cv2 不可用或评分失败时，返回第一帧。
+
+    Args:
+        snapshots: MediaKit 返回的帧列表 [{"image_url": str, ...}, ...]
+        plan_id: 计划 ID（日志用）
+
+    Returns:
+        最佳帧的 image_url，或空字符串
+    """
+    if not snapshots:
+        return ""
+    if len(snapshots) == 1:
+        return snapshots[0].get("image_url") or snapshots[0].get("url") or ""
+
+    try:
+        import tempfile
+
+        import httpx
+
+        from packages.shared.cover_frame_scorer import score_frames
+
+        scored_candidates = []
+        for snap in snapshots:
+            url = snap.get("image_url") or snap.get("url") or ""
+            if not url:
+                continue
+            # 下载帧到临时文件进行评分
+            try:
+                resp = httpx.get(url, timeout=15, follow_redirects=True)
+                resp.raise_for_status()
+                with tempfile.NamedTemporaryFile(suffix=".jpg", delete=False) as tmp:
+                    tmp.write(resp.content)
+                    tmp_path = tmp.name
+                scored_candidates.append({"image_path": tmp_path, "url": url})
+            except Exception:
+                # 下载失败的帧跳过，给默认低分
+                scored_candidates.append({"image_path": None, "url": url, "score": 0.0})
+
+        if not scored_candidates:
+            return snapshots[0].get("image_url") or snapshots[0].get("url") or ""
+
+        scored = score_frames(scored_candidates)
+        best = scored[0] if scored else None
+        best_url = best.get("url", "") if best else ""
+        best_score = best.get("score", 0.0) if best else 0.0
+        logger.info(
+            "[封面生成] 帧质量评分完成: plan_id=%s candidates=%d best_score=%.1f",
+            plan_id,
+            len(scored_candidates),
+            best_score,
+        )
+
+        # 清理临时文件
+        for c in scored_candidates:
+            path = c.get("image_path")
+            if path:
+                try:
+                    from pathlib import Path
+
+                    Path(path).unlink(missing_ok=True)
+                except Exception:
+                    pass
+
+        return best_url
+
+    except Exception:
+        logger.warning(
+            "[封面生成] 帧质量评分失败，使用第一帧: plan_id=%s",
+            plan_id,
+            exc_info=True,
+        )
+        return snapshots[0].get("image_url") or snapshots[0].get("url") or ""
+
+
 def _persist_cover_frame(
     frame_url: str,
     plan_id: str,
@@ -652,13 +732,13 @@ def generate_cover(
                     snapshots = mk_client.extract_frames(
                         video_url=primary_video_url,
                         strategy="SpecifiedFrames",
-                        max_frames=1,
+                        max_frames=5,  # 抽 5 帧，通过质量评分选最佳
                         poll_interval=2.0,
                         max_poll_attempts=5,
                         max_retries=0,
                     )
                     if snapshots:
-                        raw = snapshots[0].get("image_url") or snapshots[0].get("url") or ""
+                        raw = _select_best_frame_from_snapshots(snapshots, plan_id)
                         if raw:
                             cover_url_from_task = _persist_cover_frame(raw, plan_id)
                             logger.info(
@@ -715,13 +795,13 @@ def generate_cover(
                         snapshots = mk_client.extract_frames(
                             video_url=src_url,
                             strategy="SpecifiedFrames",
-                            max_frames=1,
+                            max_frames=5,  # 抽 5 帧，通过质量评分选最佳
                             poll_interval=2.0,
                             max_poll_attempts=5,
                             max_retries=0,
                         )
                         if snapshots:
-                            raw = snapshots[0].get("image_url") or snapshots[0].get("url") or ""
+                            raw = _select_best_frame_from_snapshots(snapshots, plan_id)
                             if raw:
                                 cover_url_from_task = _persist_cover_frame(
                                     raw,

apps/api/app/api/routes/generation_preview.py

@@ -390,7 +390,6 @@ def create_preview_generation_task(
                     template_id=request.template_id,
                     asset_ids=list(request.asset_ids),
                     title_ids=list(request.title_ids),
-                    voice_ids=list(request.voice_ids),
                     created_by_user_id=user_id,
                     source_edit_plan_id=request.source_edit_plan_id,
                     asset_select_mode="",
@@ -420,42 +419,118 @@ def create_preview_generation_task(
         logger.error("[预览生成] 创建失败: %s", e, exc_info=True)
         raise HTTPException(status_code=500, detail="创建预览生成任务失败，请稍后再试") from e
 
-    # ── 克隆独立变体 plan：N 个预览全部克隆（预览不污染源 plan）──
-    # 源 plan 不存在（无编辑历史）时各任务走自身随机选片流程，不克隆。
+    # ── 独立变体 plan（#1743）──
+    # count=1：克隆源 plan（预览不污染源 plan，仅起点重算），行为与旧版一致；
+    # count>1：变体 0 保留源 plan，变体 1..N-1 用 reselect_plan_for_variant 完整
+    #   重跑单视频选片（素材洗牌+镜头洗牌+起点随机+跨变体避让+批次 20% 重叠重选），
+    #   所见即所得——预览变体差异即正式成片差异。
     source_plan_id = created_tasks[0].source_edit_plan_id if created_tasks else ""
-    if source_plan_id:
+
+    # #1749：各变体配音解析（严格守卫已在 schema；此处取每变体 voice 查时长）+ 时长分配
+    def _preview_voice_durations() -> list[float]:
+        try:
+            from packages.domain.variant_voice_resolver import resolve_variant_voice_ids
+
+            voices = resolve_variant_voice_ids(
+                count=count,
+                voice_library_id=request.voice_library_id,
+                voice_library_ids=request.voice_library_ids or None,
+            )
+        except Exception:
+            logger.warning("[预览生成] 配音解析失败（按无配音处理）", exc_info=True)
+            return [0.0] * count
+        try:
+            from app.api.routes.generation_tasks import _query_voice_durations
+
+            return _query_voice_durations(db, voices)
+        except Exception:
+            return [0.0] * count
+
+    voice_durations = _preview_voice_durations()
+
+    if source_plan_id and count == 1:
+        # 单预览：克隆一份（原逻辑）+ 配音时长分配
         try:
             from app.services.edit_plan_service import EditPlanService
 
             _plan_svc = EditPlanService(db)
-            for variant_index in range(count):
+            variant_plan = _plan_svc.clone_plan_for_variant(
+                source_plan_id,
+                created_by_user_id=user_id,
+                name_suffix="预览变体",
+            )
+            if voice_durations and voice_durations[0] > 0:
+                try:
+                    _plan_svc.apply_voice_duration_to_plan(variant_plan.id, voice_durations[0])
+                except Exception:
+                    logger.exception("[预览生成] 变体0 配音分配失败（不阻断）: plan=%s", variant_plan.id)
+            variant_plan_ids.append(variant_plan.id)
+        except Exception as e:
+            logger.error("[预览生成] 克隆预览 plan 异常: %s", e, exc_info=True)
+            for t in created_tasks:
+                _mark_task_failed(generation_task_repository, t, "预览计划创建失败")
+            raise HTTPException(
+                status_code=500,
+                detail="创建预览任务失败：无法生成独立剪辑计划，请重试",
+            ) from e
+    elif source_plan_id and count > 1:
+        try:
+            from app.services.edit_plan_service import EditPlanService
+
+            _plan_svc = EditPlanService(db)
+            # #1749：变体 0 也 clone（不污染源 plan）+ 配音分配；变体 1..N-1 独立选片
+            _plan0 = _plan_svc.clone_plan_for_variant(
+                source_plan_id,
+                created_by_user_id=user_id,
+                name_suffix="预览变体1",
+            )
+            if voice_durations and voice_durations[0] > 0:
+                try:
+                    _plan_svc.apply_voice_duration_to_plan(_plan0.id, voice_durations[0])
+                except Exception:
+                    logger.exception("[预览生成] 变体0 配音分配失败（不阻断）: plan=%s", _plan0.id)
+            variant_plan_ids.append(_plan0.id)
+            batch_asset_pool = list(dict.fromkeys(request.asset_ids or []))
+            for variant_index in range(1, count):
                 last_err: Exception | None = None
                 variant_plan = None
                 for _attempt in range(2):  # 1 次重试，抗 DB 瞬时抖动
                     try:
-                        variant_plan = _plan_svc.clone_plan_for_variant(
+                        variant_plan = _plan_svc.reselect_plan_for_variant(
                             source_plan_id,
+                            batch_asset_pool,
                             created_by_user_id=user_id,
-                            name_suffix=f"预览变体{variant_index + 1}" if count > 1 else "预览变体",
+                            name_suffix=f"预览变体{variant_index + 1}",
+                            voice_duration=(
+                                voice_durations[variant_index] if variant_index < len(voice_durations) else 0.0
+                            ),
                         )
                         break
-                    except Exception as clone_err:  # noqa: PERF203
-                        last_err = clone_err
+                    except ValueError as ve:
+                        logger.warning("[预览生成] 变体独立选片失败(素材不足): %s", ve)
+                        for t in created_tasks:
+                            _mark_task_failed(generation_task_repository, t, "预览变体选片失败")
+                        raise HTTPException(
+                            status_code=400,
+                            detail=f"批量预览第 {variant_index + 1} 个视频无法独立选片：{ve}。"
+                            "请增加素材库中的视频素材后重试。",
+                        ) from ve
+                    except Exception as reselection_err:  # noqa: PERF203
+                        last_err = reselection_err
                         logger.warning(
-                            "[预览生成] 克隆变体 plan 失败(尝试%d/2): variant=%d error=%s",
+                            "[预览生成] 变体独立选片失败(尝试%d/2): variant=%d error=%s",
                             _attempt + 1,
                             variant_index,
-                            clone_err,
+                            reselection_err,
                             exc_info=True,
                         )
                 if variant_plan is None:
                     logger.error(
-                        "[预览生成] 克隆预览变体 plan 重试仍失败: variant=%d source=%s",
+                        "[预览生成] 变体独立选片重试仍失败: variant=%d source=%s",
                         variant_index,
                         source_plan_id,
                         exc_info=last_err,
                     )
-                    # 标记已创建任务失败
                     for t in created_tasks:
                         _mark_task_failed(generation_task_repository, t, "预览变体计划创建失败")
                     raise HTTPException(
@@ -466,7 +541,7 @@ def create_preview_generation_task(
         except HTTPException:
             raise
         except Exception as e:
-            logger.error("[预览生成] 克隆变体 plan 异常: %s", e, exc_info=True)
+            logger.error("[预览生成] 变体 plan 生成异常: %s", e, exc_info=True)
             for t in created_tasks:
                 _mark_task_failed(generation_task_repository, t, "预览变体计划创建失败")
             raise HTTPException(

apps/api/app/api/routes/generation_tasks.py

@@ -57,6 +57,30 @@ def _variant_value(values: list[str], index: int, fallback: str = "") -> str:
     return values[index] if index < len(values) else fallback
 
 
+def _query_voice_durations(db: Session, voice_ids: list[str]) -> list[float]:
+    """批量查询配音素材时长（秒），#1749 配音时长分配用。
+
+    逐项 try/float 硬化：MagicMock/异常/缺失 → 0.0（无配音不分配，不阻断）。
+    """
+    ids = [v for v in dict.fromkeys(voice_ids or []) if v]
+    if not ids:
+        return []
+    try:
+        from packages.adapters.sqlalchemy_impl.models import AssetModel
+
+        rows = db.query(AssetModel.id, AssetModel.duration).filter(AssetModel.id.in_(ids)).all()
+        dur_map: dict[str, float] = {}
+        for row in rows:
+            try:
+                dur_map[row[0]] = float(row[1] or 0.0)
+            except (TypeError, ValueError):
+                dur_map[row[0]] = 0.0
+        return [dur_map.get(v, 0.0) for v in ids]
+    except Exception:
+        logger.warning("[生成任务] 配音时长查询失败（按无配音处理，不阻断）", exc_info=True)
+        return [0.0 for _ in ids]
+
+
 def _to_generation_task_response(task) -> GenerationTaskResponse:
     return GenerationTaskResponse(
         id=task.id,
@@ -123,6 +147,7 @@ def _select_assets_from_library(
     assets: list,
     mode: str,
     count: int,
+    rng=None,
 ) -> list[str]:
     """根据选取模式从素材库中选取 ready 状态的视频素材 ID。
 
@@ -130,6 +155,8 @@ def _select_assets_from_library(
         assets: 素材库中所有素材（Asset 实体列表）
         mode: 选取模式 — all=全部, smart=智能匹配（多维度评分+多样性）
         count: 选取数量，0 表示全部（仅 smart 模式有效）
+        rng: 可选随机源（smart 模式排序噪声用），生产环境不传则内部随机；
+            测试可注入固定种子或零噪声随机源获得确定性结果。
 
     Returns:
         选中的素材 ID 列表
@@ -142,8 +169,9 @@ def _select_assets_from_library(
     if mode == "smart":
         # 智能匹配：统一使用 packages/domain/smart_match.py 的多维评分+多样性选取
         # 评分维度：质量分(40%) + 时长适配(30%) + 新鲜度(20%) + 未使用加分(10%)
+        # 排序注入随机噪声（#1743）：同分素材每次选出不同组合，从素材组合层面降重
         limit = count if count > 0 else None
-        results = smart_select_assets(ready_video_assets, limit=limit, kind="video")
+        results = smart_select_assets(ready_video_assets, limit=limit, kind="video", rng=rng)
         return [r.asset.id for r in results]
 
     # 默认 all 模式：返回全部 ready 视频素材
@@ -432,55 +460,199 @@ def create_generation_task(
         logger.info("画中画已下线，strategy_id %s → one_take", effective_strategy_id)
         effective_strategy_id = "one_take"
 
-    # 批量生成时每个任务关联独立克隆 plan（片段起点重算），
-    # 禁止 N 条任务共用同一 source_edit_plan_id 导致片段一模一样。
-    # 在创建任何任务【之前】预克隆全部变体：克隆失败直接中断（此时无脏数据），
-    # 绝不静默退回共用源 plan（否则批量视频内容重复，违反去重诉求）。
+    # 批量生成（count>1）：每个变体必须走与单视频完全相同的独立选片流程（#1743/#1749）。
+    # - 变体 0：clone 源 plan（不污染源 plan），变体 1..N-1 用 reselect_plan_for_variant
+    #   完整重跑选片（素材级去重：fresh 优先 → 受控复用 overlap≤20% → 短素材禁复用）；
+    # - #1749：前端可回传 variant-plans 接口预生成的 plan_id（variant_plan_ids），直接复用；
+    #   回传 plan 仍按各变体配音幂等重分配段长（防 variant-plans 阶段未带配音/占位时长）；
+    # - 配音时长：独立配音各自时长、统一配音同值，逐变体 apply_voice_duration_to_plan，
+    #   成片总时长=配音时长（素材短→末帧冻结，禁慢放/禁截配音）；
+    # - count>1 但没有源 plan 时，不允许 N 个任务兜底共用同一 plan，直接 4xx 中断。
+    # 在创建任何任务【之前】预生成/校验全部变体 plan：失败直接中断（此时无脏数据）。
     variant_plan_ids: list[str] = []
-    if count > 1 and request.source_edit_plan_id:
+    if count > 1:
         from app.services.edit_plan_service import EditPlanService
 
+        from packages.domain.variant_voice_resolver import VariantVoiceError, resolve_variant_voice_ids
+
         _plan_svc = EditPlanService(db)
-        for task_index in range(1, count):
-            variant = None
-            last_err: Exception | None = None
-            for _attempt in range(2):  # 1 次重试，抗 DB 瞬时抖动
-                try:
-                    variant = _plan_svc.clone_plan_for_variant(
-                        request.source_edit_plan_id,
-                        created_by_user_id=user_id,
-                        name_suffix=f"批量{task_index + 1}",
+
+        # 解析每变体配音（严格守卫：独立配音长度/缺值 → 400，禁静默 fallback）
+        try:
+            variant_voices = resolve_variant_voice_ids(
+                count=count,
+                voice_library_id=request.voice_library_id,
+                voice_library_ids=request.voice_library_ids or None,
+            )
+        except VariantVoiceError as ve:
+            raise HTTPException(status_code=400, detail=str(ve)) from ve
+        # 各变体配音时长（查询硬化：异常 → 0.0 不阻断）
+        voice_durations = _query_voice_durations(db, variant_voices)
+
+        # 解析批量源 plan：优先前端传入；否则按 template_id + user 查最新（与单任务兜底同源）
+        batch_source_plan_id = request.source_edit_plan_id
+        if not batch_source_plan_id and request.template_id:
+            try:
+                from packages.adapters.sqlalchemy_impl.models import EditPlanModel
+
+                _latest = (
+                    db.query(EditPlanModel)
+                    .filter(
+                        EditPlanModel.template_id == request.template_id,
+                        EditPlanModel.created_by_user_id == user_id,
                     )
-                    break
-                except Exception as clone_err:  # noqa: PERF203
-                    last_err = clone_err
-                    logger.warning(
-                        "[生成任务] 克隆变体 plan 失败(尝试%d/2): source=%s error=%s",
-                        _attempt + 1,
-                        request.source_edit_plan_id,
-                        clone_err,
-                        exc_info=True,
-                    )
-            if variant is None:
-                logger.error(
-                    "[生成任务] 克隆变体 plan 重试仍失败，中断批量创建: source=%s",
-                    request.source_edit_plan_id,
-                    exc_info=last_err,
+                    .order_by(EditPlanModel.created_at.desc())
+                    .first()
                 )
+                if _latest:
+                    batch_source_plan_id = _latest.id
+            except Exception:
+                logger.warning("[生成任务] 批量源 plan 解析失败", exc_info=True)
+
+        if not batch_source_plan_id and not request.variant_plan_ids:
+            # 无任何可用源 plan：批量变体无从选片，明确报错，严禁静默共用/同源
+            logger.error("[生成任务] 批量 count=%d 但无可编辑计划（无 source_edit_plan_id/template plan）", count)
+            raise HTTPException(
+                status_code=400,
+                detail="批量生成需要先完成预览生成（缺少剪辑计划）。请先生成预览后再批量创建。",
+            )
+
+        # 批次素材池：请求显式素材 + 库自动匹配素材（resolved_asset_ids）
+        batch_asset_pool = list(dict.fromkeys(resolved_asset_ids or []))
+
+        if request.variant_plan_ids:
+            # ① 前端回传 variant-plans 预生成结果：直接复用（轻量选片接口已建好 plan）
+            if len(request.variant_plan_ids) != count:
                 raise HTTPException(
-                    status_code=500,
-                    detail="创建批量任务失败：无法生成独立剪辑计划，请重试",
-                ) from last_err
-            variant_plan_ids.append(variant.id)
+                    status_code=400,
+                    detail=f"variant_plan_ids 数量({len(request.variant_plan_ids)})与视频数量({count})不一致",
+                )
+            # 校验归属权
+            from packages.adapters.sqlalchemy_impl.models import EditPlanModel
+
+            for _pid in request.variant_plan_ids:
+                _pm = db.query(EditPlanModel).filter(EditPlanModel.id == _pid).first()
+                if _pm is None:
+                    raise HTTPException(status_code=400, detail=f"剪辑计划不存在: {_pid}")
+                if _pm.created_by_user_id and _pm.created_by_user_id != user_id:
+                    raise HTTPException(status_code=403, detail=f"无权使用剪辑计划: {_pid}")
+            variant_plan_ids = list(request.variant_plan_ids)
+        else:
+            # ② 服务端选片：变体 0 clone 源 plan（不污染源 plan）
+            try:
+                _plan0 = _plan_svc.clone_plan_for_variant(
+                    batch_source_plan_id,
+                    created_by_user_id=user_id,
+                    name_suffix="批量1",
+                )
+            except Exception as clone_err:
+                logger.error("[生成任务] 变体0 clone 失败: %s", clone_err, exc_info=True)
+                raise HTTPException(
+                    status_code=500, detail="创建批量任务失败：无法生成独立剪辑计划，请重试"
+                ) from clone_err
+            variant_plan_ids.append(_plan0.id)
+
+            # 变体 1..N-1 独立选片
+            for task_index in range(1, count):
+                variant = None
+                last_err: Exception | None = None
+                for _attempt in range(2):  # 1 次重试，抗 DB 瞬时抖动
+                    try:
+                        variant = _plan_svc.reselect_plan_for_variant(
+                            batch_source_plan_id,
+                            batch_asset_pool,
+                            created_by_user_id=user_id,
+                            name_suffix=f"批量{task_index + 1}",
+                            voice_duration=voice_durations[task_index] if task_index < len(voice_durations) else 0.0,
+                        )
+                        break
+                    except ValueError as ve:
+                        # 素材不足等可预期错误：不重试，直接中断并给出明确提示
+                        logger.warning("[生成任务] 变体独立选片失败(素材不足): %s", ve)
+                        raise HTTPException(
+                            status_code=400,
+                            detail=f"批量生成第 {task_index + 1} 个视频无法独立选片：{ve}。"
+                            "请增加素材库中的视频素材后重试。",
+                        ) from ve
+                    except Exception as reselection_err:  # noqa: PERF203
+                        last_err = reselection_err
+                        logger.warning(
+                            "[生成任务] 变体独立选片失败(尝试%d/2): source=%s error=%s",
+                            _attempt + 1,
+                            batch_source_plan_id,
+                            reselection_err,
+                            exc_info=True,
+                        )
+                if variant is None:
+                    logger.error(
+                        "[生成任务] 变体独立选片重试仍失败，中断批量创建: source=%s",
+                        batch_source_plan_id,
+                        exc_info=last_err,
+                    )
+                    raise HTTPException(
+                        status_code=500,
+                        detail="创建批量任务失败：无法生成独立剪辑计划，请重试",
+                    ) from last_err
+                variant_plan_ids.append(variant.id)
+
+        # ③ 配音时长分配（回传 plan / clone 变体0 均需幂等分配；reselect 已在选片时分配）
+        for _vi, _pid in enumerate(variant_plan_ids):
+            _vd = voice_durations[_vi] if _vi < len(voice_durations) else 0.0
+            if _vd > 0:
+                try:
+                    _plan_svc.apply_voice_duration_to_plan(_pid, _vd)
+                except Exception:
+                    logger.exception("[生成任务] 变体%d 配音时长分配失败（不阻断）: plan=%s", _vi, _pid)
+
+    # N=1 正式生成：渲染侧全局慢放兜底已删除（#1749），enqueue 前也必须按配音分配段长
+    if count == 1 and not request.is_preview:
+        from packages.domain.variant_voice_resolver import VariantVoiceError, resolve_variant_voice_ids
+
+        try:
+            _voices = resolve_variant_voice_ids(
+                count=1,
+                voice_library_id=request.voice_library_id,
+                voice_library_ids=request.voice_library_ids or None,
+            )
+            _single_vd: list[float] = _query_voice_durations(db, _voices)
+            _single_dur = _single_vd[0] if _single_vd else 0.0
+            _single_plan = request.source_edit_plan_id
+            if not _single_plan and request.template_id:
+                try:
+                    from packages.adapters.sqlalchemy_impl.models import EditPlanModel
+
+                    _latest = (
+                        db.query(EditPlanModel)
+                        .filter(
+                            EditPlanModel.template_id == request.template_id,
+                            EditPlanModel.created_by_user_id == user_id,
+                        )
+                        .order_by(EditPlanModel.created_at.desc())
+                        .first()
+                    )
+                    if _latest:
+                        _single_plan = _latest.id
+                except Exception:
+                    logger.warning("[生成任务] 单任务源 plan 解析失败", exc_info=True)
+            if _single_dur > 0 and _single_plan:
+                from app.services.edit_plan_service import EditPlanService
+
+                try:
+                    EditPlanService(db).apply_voice_duration_to_plan(_single_plan, _single_dur)
+                except Exception:
+                    logger.exception("[生成任务] N=1 配音时长分配失败（不阻断）: plan=%s", _single_plan)
+        except VariantVoiceError as ve:
+            raise HTTPException(status_code=400, detail=str(ve)) from ve
+        except Exception:
+            logger.exception("[生成任务] N=1 配音分配兜底异常（不阻断）")
 
     try:
         for task_index in range(count):
-            # 第 1 条复用源 plan（保留用户编辑结果）；其余使用预克隆的独立变体 plan。
-            # 无源 plan（source_edit_plan_id 为空）时无可克隆对象，variant_plan_ids
-            # 为空列表：各任务走自身随机选片流程，不做索引访问（防 IndexError）
-            effective_plan_id = request.source_edit_plan_id
-            if task_index > 0 and variant_plan_ids:
-                effective_plan_id = variant_plan_ids[task_index - 1]
+            # #1749：count>1 时每个变体（含变体0）都关联各自独立 plan（clone/reselect/variant-plans）。
+            if count > 1 and variant_plan_ids:
+                effective_plan_id = variant_plan_ids[task_index]
+            else:
+                effective_plan_id = request.source_edit_plan_id
 
             # 变体级独立配置：titles[]/voice_library_ids[]/cover_urls[]
             # 长度1=所有变体共用，长度=count=每个变体独立，空数组=回退单值字段
@@ -500,7 +672,6 @@ def create_generation_task(
                     template_id=request.template_id,
                     asset_ids=resolved_asset_ids,
                     title_ids=request.title_ids,
-                    voice_ids=request.voice_ids,
                     created_by_user_id=user_id,
                     source_edit_plan_id=effective_plan_id,
                     asset_select_mode=request.asset_select_mode,
@@ -523,7 +694,19 @@ def create_generation_task(
             try:
                 # 兜底关联编辑计划：前端未传 source_edit_plan_id 时，
                 # 通过 template_id + user_id 在 DB 层直接查找最新的 plan。
-                # 必须在 enqueue 之前执行，避免 worker 读取时 source_edit_plan_id 为空（竞态条件）
+                # 必须在 enqueue 之前执行，避免 worker 读取时 source_edit_plan_id 为空（竞态条件）。
+                # #1743：批量（count>1）场景严禁兜底共用——变体 plan 已在上方预生成，
+                # 走到这里还缺 plan 说明预生成漏配，直接报错中断，不允许 N 任务关联同一 plan。
+                if not task.source_edit_plan_id and count > 1:
+                    logger.error(
+                        "[生成任务] 批量任务缺少独立 plan（禁止共用兜底）: task_index=%d task_id=%s",
+                        task_index,
+                        task.id,
+                    )
+                    raise HTTPException(
+                        status_code=500,
+                        detail="创建批量任务失败：变体剪辑计划缺失，请重新预览后再批量生成。",
+                    )
                 if not task.source_edit_plan_id and request.template_id:
                     try:
                         from packages.adapters.sqlalchemy_impl.models import EditPlanModel
@@ -690,7 +873,6 @@ def confirm_generation(
             template_id=source_task.template_id,
             asset_ids=source_task.asset_ids,
             title_ids=source_task.title_ids,
-            voice_ids=source_task.voice_ids,
             created_by_user_id=authenticated_user.user.id,
             source_edit_plan_id=source_task.source_edit_plan_id or "",
             asset_select_mode=source_task.asset_select_mode,
@@ -834,7 +1016,6 @@ def retry_generation_task(
             template_id=task.template_id,
             asset_ids=task.asset_ids,
             title_ids=task.title_ids,
-            voice_ids=task.voice_ids,
             created_by_user_id=user_id,
             source_edit_plan_id=task.source_edit_plan_id or "",
             asset_select_mode=getattr(task, "asset_select_mode", ""),

apps/api/app/api/routes/generation_variant_plans.py

@@ -0,0 +1,178 @@
+"""轻量选片接口 POST /generation/variant-plans（#1749）。
+
+与正式生成共用同一套选片函数（EditPlanService.ensure_variant_plans →
+clone_plan_for_variant / reselect_plan_for_variant → variant_plan_selector），
+但**不建任务、不入队、不渲染**：
+
+- 仅为 N 个变体创建/选好 EditPlan + clips，返回 plan_id 与片段列表；
+- 前端确认后调正式生成接口回传 variant_plan_ids，直接复用这些 plan，
+  不再重复选片（回传后仍按各变体配音幂等重分配段长）；
+- 配音守卫：voice_library_ids 长度/缺值 → 400（variant_voice_resolver），
+  禁静默 fallback；
+- 素材不足等选片失败 → 400（与正式生成同口径）；除此之外不报错打断。
+"""
+
+from __future__ import annotations
+
+import logging
+from typing import Any
+
+from app.auth import AuthenticatedUser, get_current_user
+from app.dependencies import get_db_session
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel, Field, model_validator
+from sqlalchemy.orm import Session
+
+from packages.domain.variant_voice_resolver import VariantVoiceError, resolve_variant_voice_ids
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter()
+
+
+class VariantPlanRequest(BaseModel):
+    """轻量选片请求体（与前端 variantPlans.ts 契约一致）。"""
+
+    template_id: str = Field(default="", description="模板 ID（无 source_edit_plan_id 时用于查找骨架 plan）")
+    asset_ids: list[str] = Field(default_factory=list, description="批次素材池")
+    count: int = Field(default=1, ge=1, le=50, description="变体数量")
+    source_edit_plan_id: str = Field(default="", description="源剪辑计划 ID（优先）")
+    # 配音（可选；传独立配音时严格守卫）
+    voice_library_id: str = Field(default="", description="统一配音 ID")
+    voice_library_ids: list[str] = Field(default_factory=list, description="独立配音 ID 列表（长度须=count）")
+
+    @model_validator(mode="after")
+    def _validate(self) -> "VariantPlanRequest":
+        if not self.template_id.strip() and not self.source_edit_plan_id.strip():
+            raise ValueError("template_id 与 source_edit_plan_id 至少需要提供一个")
+        try:
+            resolve_variant_voice_ids(
+                count=self.count,
+                voice_library_id=self.voice_library_id,
+                voice_library_ids=self.voice_library_ids or None,
+            )
+        except VariantVoiceError as exc:
+            raise ValueError(str(exc)) from exc
+        return self
+
+
+class VariantPlanItem(BaseModel):
+    variant_index: int
+    plan_id: str
+    clips: list[dict[str, Any]] = Field(default_factory=list)
+
+
+class VariantPlanResponse(BaseModel):
+    items: list[VariantPlanItem]
+    total: int
+
+
+@router.post("/variant-plans", response_model=VariantPlanResponse)
+def create_variant_plans(
+    request: VariantPlanRequest,
+    authenticated_user: AuthenticatedUser = Depends(get_current_user),
+    db: Session = Depends(get_db_session),
+) -> VariantPlanResponse:
+    """轻量选片：为 N 个变体创建独立 EditPlan + clips，不建任务/不渲染。
+
+    Returns:
+        200 + {items: [{variant_index, plan_id, clips}], total}
+    """
+    user_id = authenticated_user.user.id
+
+    # 配音严格守卫（schema 已校验，此处复用解析取每变体配音）
+    try:
+        voices = resolve_variant_voice_ids(
+            count=request.count,
+            voice_library_id=request.voice_library_id,
+            voice_library_ids=request.voice_library_ids or None,
+        )
+    except VariantVoiceError as exc:
+        raise HTTPException(status_code=400, detail=str(exc)) from exc
+
+    # 解析源 plan：显式传入优先；否则按 template_id + user 查最新
+    source_plan_id = request.source_edit_plan_id.strip()
+    if not source_plan_id and request.template_id.strip():
+        try:
+            from packages.adapters.sqlalchemy_impl.models import EditPlanModel
+
+            _latest = (
+                db.query(EditPlanModel)
+                .filter(
+                    EditPlanModel.template_id == request.template_id.strip(),
+                    EditPlanModel.created_by_user_id == user_id,
+                )
+                .order_by(EditPlanModel.created_at.desc())
+                .first()
+            )
+            if _latest:
+                source_plan_id = _latest.id
+        except Exception:
+            logger.warning("[variant-plans] 源 plan 解析失败", exc_info=True)
+
+    if not source_plan_id:
+        raise HTTPException(
+            status_code=400,
+            detail="缺少剪辑计划：请先完成一次预览生成（或传入 source_edit_plan_id）后再试。",
+        )
+
+    # 配音时长（硬化：异常 → 0.0 不阻断选片）
+    try:
+        from app.api.routes.generation_tasks import _query_voice_durations
+
+        voice_durations = _query_voice_durations(db, voices)
+    except Exception:
+        logger.warning("[variant-plans] 配音时长查询失败（按占位段长选片）", exc_info=True)
+        voice_durations = [0.0] * request.count
+
+    from app.services.edit_plan_service import EditPlanService
+
+    svc = EditPlanService(db)
+    try:
+        plan_ids = svc.ensure_variant_plans(
+            source_plan_id,
+            request.count,
+            list(dict.fromkeys(request.asset_ids or [])),
+            created_by_user_id=user_id,
+            voice_durations=voice_durations,
+        )
+    except ValueError as ve:
+        # 素材池为空/时长全未知等可预期错误 → 400（与正式生成同口径）
+        logger.warning("[variant-plans] 选片失败: %s", ve)
+        raise HTTPException(status_code=400, detail=f"变体选片失败：{ve}。请增加素材后重试。") from ve
+    except HTTPException:
+        raise
+    except Exception as e:
+        logger.error("[variant-plans] 选片异常: %s", e, exc_info=True)
+        raise HTTPException(status_code=500, detail="选片失败，请稍后重试") from e
+
+    # 组装 clips 响应
+    items: list[VariantPlanItem] = []
+    for idx, pid in enumerate(plan_ids):
+        clips = svc.list_clips(pid)
+        clip_dicts = [
+            {
+                "id": c.id,
+                "order": c.order,
+                "asset_id": c.asset_id,
+                "start_time": float(c.start_time or 0.0),
+                "duration": float(c.duration or 0.0),
+                "clip_type": c.clip_type,
+                "transition_effect": c.transition_effect,
+                "transition_duration": float(c.transition_duration or 0.0),
+                "playback_speed": float(c.playback_speed or 1.0),
+                "text_content": c.text_content or "",
+                "status": c.status or "ready",
+            }
+            for c in clips
+        ]
+        items.append(VariantPlanItem(variant_index=idx, plan_id=pid, clips=clip_dicts))
+
+    logger.info(
+        "[variant-plans] 轻量选片完成: user=%s source=%s count=%d plans=%d",
+        user_id,
+        source_plan_id,
+        request.count,
+        len(plan_ids),
+    )
+    return VariantPlanResponse(items=items, total=len(items))

apps/api/app/api/routes/lipsync.py

@@ -0,0 +1,145 @@
+"""对口型 API 路由 — #1796 MediaKit 对口型.
+
+接口：
+  POST   /api/v1/lipsync/jobs          提交对口型任务
+  GET    /api/v1/lipsync/jobs          任务列表
+  GET    /api/v1/lipsync/jobs/{id}     任务详情
+  POST   /api/v1/lipsync/jobs/{id}/refresh  刷新任务状态
+  POST   /api/v1/lipsync/jobs/{id}/cancel   取消任务
+"""
+
+from __future__ import annotations
+
+import logging
+
+from app.auth import AuthenticatedUser, get_current_user
+from app.dependencies import get_db_session
+from app.schemas.lipsync import CreateLipsyncJobRequest, LipsyncJobResponse
+from app.services.lipsync_service import LipsyncService
+from app.services.mediakit_client import MediaKitError
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter()
+
+
+def _get_service(db: Session = Depends(get_db_session)) -> LipsyncService:
+    return LipsyncService(db)
+
+
+# ── POST /jobs — 提交对口型任务 ───────────────────────────────────────────
+
+
+@router.post("/jobs", response_model=LipsyncJobResponse, status_code=201)
+def create_lipsync_job(
+    body: CreateLipsyncJobRequest,
+    current_user: AuthenticatedUser = Depends(get_current_user),
+    svc: LipsyncService = Depends(_get_service),
+):
+    """提交对口型任务.
+
+    输入人物视频 + 驱动音频，异步生成口型对齐视频。
+    """
+    try:
+        job = svc.create_job(
+            user_id=current_user.id,
+            video_url=body.video_url,
+            audio_url=body.audio_url,
+            enable_video_loop=body.enable_video_loop,
+            project_id=body.project_id,
+        )
+    except MediaKitError as exc:
+        # 创建失败（job 已记录 error），返回 502
+        raise HTTPException(
+            status_code=502,
+            detail={
+                "code": exc.code,
+                "message": str(exc),
+                "request_id": exc.request_id,
+            },
+        ) from exc
+
+    return job
+
+
+# ── GET /jobs — 任务列表 ─────────────────────────────────────────────────
+
+
+@router.get("/jobs", response_model=dict)
+def list_lipsync_jobs(
+    project_id: str = Query("", description="项目 ID 过滤"),
+    status: str = Query("", description="状态过滤"),
+    offset: int = Query(0, ge=0),
+    limit: int = Query(20, ge=1, le=100),
+    current_user: AuthenticatedUser = Depends(get_current_user),
+    svc: LipsyncService = Depends(_get_service),
+):
+    """获取对口型任务列表."""
+    items, total = svc.list_jobs(
+        user_id=current_user.id,
+        project_id=project_id,
+        status=status,
+        offset=offset,
+        limit=limit,
+    )
+    return {
+        "items": [LipsyncJobResponse.model_validate(j) for j in items],
+        "total": total,
+        "offset": offset,
+        "limit": limit,
+    }
+
+
+# ── GET /jobs/{job_id} — 任务详情 ────────────────────────────────────────
+
+
+@router.get("/jobs/{job_id}", response_model=LipsyncJobResponse)
+def get_lipsync_job(
+    job_id: str,
+    current_user: AuthenticatedUser = Depends(get_current_user),
+    svc: LipsyncService = Depends(_get_service),
+):
+    """获取对口型任务详情."""
+    job = svc.get_job(job_id, current_user.id)
+    if job is None:
+        raise HTTPException(status_code=404, detail="任务不存在")
+    return job
+
+
+# ── POST /jobs/{job_id}/refresh — 刷新状态 ───────────────────────────────
+
+
+@router.post("/jobs/{job_id}/refresh", response_model=LipsyncJobResponse)
+def refresh_lipsync_job(
+    job_id: str,
+    current_user: AuthenticatedUser = Depends(get_current_user),
+    svc: LipsyncService = Depends(_get_service),
+):
+    """从 MediaKit 拉取最新状态并更新."""
+    job = svc.refresh_job_status(job_id, current_user.id)
+    if job is None:
+        raise HTTPException(status_code=404, detail="任务不存在")
+    return job
+
+
+# ── POST /jobs/{job_id}/cancel — 取消任务 ────────────────────────────────
+
+
+@router.post("/jobs/{job_id}/cancel", response_model=LipsyncJobResponse)
+def cancel_lipsync_job(
+    job_id: str,
+    current_user: AuthenticatedUser = Depends(get_current_user),
+    svc: LipsyncService = Depends(_get_service),
+):
+    """取消对口型任务（仅 pending/submitted 状态可取消）."""
+    job = svc.cancel_job(job_id, current_user.id)
+    if job is None:
+        raise HTTPException(status_code=404, detail="任务不存在")
+    if job.status != "cancelled":
+        raise HTTPException(
+            status_code=400,
+            detail=f"任务状态 {job.status} 不可取消，仅 pending/submitted 可取消",
+        )
+    return job

apps/api/app/api/routes/projects.py

@@ -1,13 +1,14 @@
 from typing import Any
 
 from app.auth import AuthenticatedUser, get_current_user
-from app.dependencies import get_project_repository
+from app.dependencies import get_asset_library_repository, get_project_repository
 from app.schemas.project import (
     CreateProjectRequest,
     ListProjectsResponse,
     ProjectResponse,
 )
 from fastapi import APIRouter, Depends, HTTPException, Response, status
+from pydantic import BaseModel
 
 from packages.application import (
     CreateProjectCommand,
@@ -16,10 +17,20 @@ from packages.application import (
     GetProjectUseCase,
     ListProjectsUseCase,
 )
+from packages.domain import AssetLibraryKind
 
 router = APIRouter()
 
 
+class DefaultContextResponse(BaseModel):
+    """幂等默认上下文响应（Issue #1775）：默认项目 + 各类型默认素材库 ID。"""
+
+    project_id: str
+    image_library_id: str
+    video_library_id: str
+    voice_library_id: str
+
+
 def _to_project_response(item) -> ProjectResponse:
     return ProjectResponse(
         id=item.id,
@@ -72,6 +83,35 @@ def create_project(
     return _to_project_response(project)
 
 
+@router.post("/ensure-default", response_model=DefaultContextResponse)
+def ensure_default_project_and_libraries(
+    authenticated_user: AuthenticatedUser = Depends(get_current_user),
+    project_repository: Any = Depends(get_project_repository),
+    asset_library_repository: Any = Depends(get_asset_library_repository),
+) -> DefaultContextResponse:
+    """幂等获取/创建当前用户的默认项目和三类默认素材库（Issue #1775）。
+
+    - 同一用户永远只有一个默认项目（部分唯一索引 uq_projects_owner_default）
+    - 同一项目同 kind 永远只有一个默认素材库（唯一约束 uq_asset_libraries_project_kind）
+    - 并发调用/失败重试：唯一约束冲突时返回已存在记录，不报 500
+    - 项目和素材库的创建各自在仓储事务内幂等，冲突回滚后重查返回同一条
+    """
+    user_id = authenticated_user.user.id
+    project = project_repository.get_or_create_default_project(user_id)
+
+    libraries = {}
+    for kind in (AssetLibraryKind.VIDEO, AssetLibraryKind.VOICE, AssetLibraryKind.IMAGE):
+        library = asset_library_repository.get_or_create_default_library(project.id, kind)
+        libraries[kind] = library.id
+
+    return DefaultContextResponse(
+        project_id=project.id,
+        image_library_id=libraries[AssetLibraryKind.IMAGE],
+        video_library_id=libraries[AssetLibraryKind.VIDEO],
+        voice_library_id=libraries[AssetLibraryKind.VOICE],
+    )
+
+
 @router.delete("/{project_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None, response_class=Response)
 def delete_project(
     project_id: str,

apps/api/app/api/routes/scripts.py

@@ -0,0 +1,123 @@
+"""Script (口播文案库) CRUD routes — Issue #1795."""
+
+from __future__ import annotations
+
+from typing import Optional
+
+from app.auth import AuthenticatedUser, get_current_user
+from app.dependencies import get_db_session
+from app.schemas.script import (
+    CreateScriptRequest,
+    ScriptListResponse,
+    ScriptResponse,
+    ScriptSegment,
+    UpdateScriptRequest,
+)
+from app.services.script_service import ScriptNotFoundError, ScriptService
+from fastapi import APIRouter, Depends, HTTPException, Query, Response, status
+from sqlalchemy.orm import Session
+
+router = APIRouter()
+
+
+def _get_service(session: Session = Depends(get_db_session)) -> ScriptService:
+    return ScriptService(session)
+
+
+def _to_response(script) -> ScriptResponse:
+    segments = script.segments or []
+    return ScriptResponse(
+        id=script.id,
+        user_id=script.user_id,
+        title=script.title,
+        content=script.content,
+        segments=[
+            ScriptSegment(text=s.get("text", ""), duration=s.get("duration")) if isinstance(s, dict) else s
+            for s in segments
+        ],
+        tags=script.tags or [],
+        created_at=script.created_at,
+        updated_at=script.updated_at,
+    )
+
+
+@router.get("", response_model=ScriptListResponse)
+def list_scripts(
+    skip: int = Query(0, ge=0),
+    limit: int = Query(50, ge=1, le=200),
+    tag: Optional[str] = Query(None, description="按标签筛选"),
+    authenticated_user: AuthenticatedUser = Depends(get_current_user),
+    svc: ScriptService = Depends(_get_service),
+) -> ScriptListResponse:
+    user_id = authenticated_user.user.id
+    items, total = svc.list_scripts(user_id, skip=skip, limit=limit, tag=tag)
+    return ScriptListResponse(
+        items=[_to_response(i) for i in items],
+        total=total,
+    )
+
+
+@router.post("", response_model=ScriptResponse, status_code=status.HTTP_201_CREATED)
+def create_script(
+    request: CreateScriptRequest,
+    authenticated_user: AuthenticatedUser = Depends(get_current_user),
+    svc: ScriptService = Depends(_get_service),
+) -> ScriptResponse:
+    user_id = authenticated_user.user.id
+    script = svc.create_script(
+        user_id=user_id,
+        title=request.title,
+        content=request.content,
+        segments=[s.model_dump() for s in request.segments],
+        tags=request.tags,
+    )
+    return _to_response(script)
+
+
+@router.get("/{script_id}", response_model=ScriptResponse)
+def get_script(
+    script_id: str,
+    authenticated_user: AuthenticatedUser = Depends(get_current_user),
+    svc: ScriptService = Depends(_get_service),
+) -> ScriptResponse:
+    user_id = authenticated_user.user.id
+    try:
+        script = svc.get_script(script_id, user_id)
+    except ScriptNotFoundError as exc:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Script not found") from exc
+    return _to_response(script)
+
+
+@router.put("/{script_id}", response_model=ScriptResponse)
+def update_script(
+    script_id: str,
+    request: UpdateScriptRequest,
+    authenticated_user: AuthenticatedUser = Depends(get_current_user),
+    svc: ScriptService = Depends(_get_service),
+) -> ScriptResponse:
+    user_id = authenticated_user.user.id
+    try:
+        script = svc.update_script(
+            script_id=script_id,
+            user_id=user_id,
+            title=request.title,
+            content=request.content,
+            segments=[s.model_dump() for s in request.segments] if request.segments is not None else None,
+            tags=request.tags,
+        )
+    except ScriptNotFoundError as exc:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Script not found") from exc
+    return _to_response(script)
+
+
+@router.delete("/{script_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None, response_class=Response)
+def delete_script(
+    script_id: str,
+    authenticated_user: AuthenticatedUser = Depends(get_current_user),
+    svc: ScriptService = Depends(_get_service),
+) -> Response:
+    user_id = authenticated_user.user.id
+    deleted = svc.delete_script(script_id, user_id)
+    if not deleted:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Script not found")
+    return

apps/api/app/api/routes/templates.py

@@ -106,6 +106,10 @@ def list_templates(
     tag: str | None = Query(None, description="按标签筛选"),
     keyword: str | None = Query(None, description="按名称关键词搜索"),
     mode: str | None = Query(None, description="按剪辑模式筛选"),
+    valid_only: bool = Query(
+        False,
+        description="仅返回已配置片段的模板（剪辑页传 true；模板编辑器不传，可查看全部模板含草稿）",
+    ),
     authenticated_user: AuthenticatedUser = Depends(get_current_user),
     template_repository: SQLAlchemyTemplateRepository = Depends(_get_template_repository),
 ) -> ListTemplatesResponse:
@@ -116,6 +120,7 @@ def list_templates(
             tag=tag,
             keyword=keyword,
             mode=mode,
+            valid_only=valid_only,
         )
         use_case = ListTemplatesUseCase(template_repository)
         templates = use_case.execute(user_id, skip=skip, limit=limit, filter=tpl_filter)

apps/api/app/api/routes/templates_editor/clips.py

@@ -36,17 +36,11 @@ from app.services.asset_segment_tracker import (
     remove_used_segment,
 )
 from app.services.edit_plan_service import EditPlanService
-from app.services.edit_template_service import EditTemplateService
+from app.services.edit_template_service import EditTemplateService, TemplateNotFoundError
 from fastapi import APIRouter, BackgroundTasks, Depends, HTTPException, Query, status
 from sqlalchemy.orm import Session
 
 from packages.adapters.sqlalchemy_impl.asset_repository import SQLAlchemyAssetRepository
-from packages.adapters.sqlalchemy_impl.template_clip_config_repository import (
-    SQLAlchemyTemplateClipConfigRepository,
-)
-from packages.adapters.sqlalchemy_impl.template_repository import (
-    SQLAlchemyTemplateRepository,
-)
 from packages.domain.plan_generator_utils import (
     _calc_random_start_time,
     build_scene_segments,
@@ -399,68 +393,42 @@ def _safe_segment_duration(value, default: float) -> float:
 
 def _get_template_segments(
     template_id: str,
+    user_id: str,
     tpl_svc: EditTemplateService,
-    db: Session,
 ) -> list[tuple[int, float, float]]:
     """获取模板的片段配置（顺序、最短时长、最长时长）.
 
-    优先从新模板系统（template_clip_configs）查询，
-    若不存在则回退到旧模板系统（template_segments）。
+    单一数据源：模板主表为 ``templates``（用户自建，归属 user_id）/
+    ``edit_templates``（全局模板库），片段配置主表为 ``template_clip_configs``
+    （由 ``EditTemplateService.list_clip_configs_for_editor`` 统一读取）。
+
+    不再使用"新表抛异常 → 降级直查配置表 → 再降级查 segments"的异常控制流，
+    也不在正常请求中打印 ``ValueError: 模板不存在`` 堆栈。
+
+    Args:
+        template_id: 模板 ID
+        user_id: 当前登录用户 ID（用于归属校验）
+        tpl_svc: 模板编辑器服务
 
     Returns:
-        [(segment_order, duration_min, duration_max), ...] 按 order 排序
+        [(segment_order, duration_min, duration_max), ...] 按 order 排序；
+        模板存在但未配置片段时返回空列表。
+
+    Raises:
+        TemplateNotFoundError: 模板不存在、已删除或不归属于当前用户。
     """
-    # 优先查新模板系统
-    try:
-        clip_configs = tpl_svc.list_clip_configs(template_id)
-        if clip_configs:
-            result = []
-            for cc in clip_configs:
-                dur_min = _safe_segment_duration(cc.min_duration, _DEFAULT_EDITOR_CLIP_DURATION)
-                dur_max = _safe_segment_duration(
-                    cc.max_duration or cc.min_duration,
-                    _DEFAULT_EDITOR_CLIP_DURATION,
-                )
-                dur_min, dur_max = min(dur_min, dur_max), max(dur_min, dur_max)
-                result.append((cc.order, dur_min, dur_max))
-            return sorted(result, key=lambda x: x[0])
-    except Exception:
-        logger.warning("新模板系统查询clip_configs失败（主表可能不存在），直接查clip_configs表", exc_info=True)
+    clip_configs = tpl_svc.list_clip_configs_for_editor(template_id, user_id)
 
-    # 兜底：直接查 template_clip_configs 表（片段表有 template_id 外键，不依赖模板主表）
-    try:
-        direct_repo = SQLAlchemyTemplateClipConfigRepository(db)
-        direct_configs = direct_repo.list_by_template(template_id)
-        if direct_configs:
-            result = []
-            for cc in direct_configs:
-                dur_min = _safe_segment_duration(cc.min_duration, _DEFAULT_EDITOR_CLIP_DURATION)
-                dur_max = _safe_segment_duration(
-                    cc.max_duration or cc.min_duration,
-                    _DEFAULT_EDITOR_CLIP_DURATION,
-                )
-                dur_min, dur_max = min(dur_min, dur_max), max(dur_min, dur_max)
-                result.append((cc.order, dur_min, dur_max))
-            return sorted(result, key=lambda x: x[0])
-    except Exception:
-        logger.warning("直接查clip_configs表也失败，继续回退旧系统", exc_info=True)
-
-    # 回退到旧模板系统（template_segments表）
-    try:
-        old_repo = SQLAlchemyTemplateRepository(db)
-        segments = old_repo.list_segments(template_id)
-        if segments:
-            result = []
-            for s in segments:
-                dur_min = _safe_segment_duration(s.duration_min, _DEFAULT_EDITOR_CLIP_DURATION)
-                dur_max = _safe_segment_duration(s.duration_max, _DEFAULT_EDITOR_CLIP_DURATION)
-                dur_min, dur_max = min(dur_min, dur_max), max(dur_min, dur_max)
-                result.append((s.segment_order, dur_min, dur_max))
-            return sorted(result, key=lambda x: x[0])
-    except Exception:
-        logger.warning("旧模板系统查询segments失败", exc_info=True)
-
-    return []
+    result = []
+    for cc in clip_configs:
+        dur_min = _safe_segment_duration(cc.min_duration, _DEFAULT_EDITOR_CLIP_DURATION)
+        dur_max = _safe_segment_duration(
+            cc.max_duration or cc.min_duration,
+            _DEFAULT_EDITOR_CLIP_DURATION,
+        )
+        dur_min, dur_max = min(dur_min, dur_max), max(dur_min, dur_max)
+        result.append((cc.order, dur_min, dur_max))
+    return sorted(result, key=lambda x: x[0])
 
 
 def _recommended_time_conflicts(
@@ -663,13 +631,21 @@ def create_clips_from_assets_editor(
     7. 素材时长为 0 或缺失时报 400，不创建无效片段
     """
     tpl_svc, plan_svc = services
+    user_id = str(current_user.user.id)
 
-    # 1. 查询模板 segments
-    segments = _get_template_segments(template_id, tpl_svc, db)
+    # 1. 查询模板片段配置。模板不存在/已删除/无权限 → 404；
+    #    模板存在但确实未配置片段 → 422（配置错误，与 404 区分）。
+    try:
+        segments = _get_template_segments(template_id, user_id, tpl_svc)
+    except TemplateNotFoundError as exc:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="模板不存在或无权访问",
+        ) from exc
     if not segments:
         raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST,
-            detail="模板没有片段配置，无法创建片段",
+            status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
+            detail="模板未配置片段",
         )
 
     # 防御：schema validator 已过滤 null/空串，这里再归一化一次，

apps/api/app/api/routes/templates_editor/dependencies.py

@@ -41,29 +41,33 @@ def get_draft_plan_id(
     这是模板编辑器路由的核心依赖——所有编辑器端点都先经过这里，
     确保 template_id → plan_id 的映射始终存在。
 
-    兼容策略：优先从新模板系统（edit_templates 表）查找，
-    若不存在则回退到旧模板系统（templates 表），确保用户自建模板可用。
+    模板读取遵循单一数据源、显式判定（不使用异常降级）：
+    - 用户自建模板在旧表 ``templates``（归属 user_id，is_active=True）；
+    - 全局模板在新表 ``edit_templates``（无 user_id，全局可读）。
+    模板不存在、已删除或不归属于当前用户时，一律返回 404。
     """
     tpl_svc, plan_svc = services
     user_id = str(current_user.user.id)
 
+    # 0. 门禁：校验模板存在且可访问（即使草稿已缓存命中也要校验，
+    #    避免模板被删除/无权访问后仍可通过既有草稿 plan 继续操作）。
+    old_repo = SQLAlchemyTemplateRepository(db)
+    old_template = old_repo.get_active(template_id, user_id)
+    is_global_template = tpl_svc.get_template(template_id) is not None
+    if old_template is None and not is_global_template:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="模板不存在")
+
     # 1. 草稿已存在 → 直接返回
     draft = tpl_svc.get_template_draft(template_id)
     if draft is not None:
         return draft.id
 
-    # 2. 新系统有模板 → 用新服务创建草稿
-    if tpl_svc.get_template(template_id) is not None:
+    # 2. 全局模板（新系统）→ 用新服务创建草稿
+    if is_global_template:
         draft = tpl_svc.create_template_draft(template_id, user_id=user_id)
         return draft.id
 
-    # 3. 回退到旧模板系统（templates 表）
-    old_repo = SQLAlchemyTemplateRepository(db)
-    old_template = old_repo.get(template_id, user_id=user_id)
-    if old_template is None:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="模板不存在")
-
-    # 4. 基于旧模板创建草稿计划
+    # 3. 旧模板（templates 表）→ 基于旧模板创建草稿计划
     from app.services.plan_generator_service import PlanGeneratorService
 
     from packages.domain.edit_template import EditTemplate, EditTemplateStatus

apps/api/app/api/routes/templates_editor/draft.py

@@ -150,7 +150,7 @@ def rollback_template(
     try:
         tpl = tpl_svc.rollback_to_version(template_id, request.version)
     except ValueError as exc:
-        raise HTTPException(status_code=400, detail=str(exc)) from exc
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
 
     clip_configs = tpl_svc.list_clip_configs(template_id)
     return EditorRollbackResponse(

apps/api/app/api/routes/upload.py

@@ -208,6 +208,8 @@ def _create_pending_asset(
     find-or-create：prepare 阶段已按 file_hash/client_upload_id 预建的占位记录
     会被 find_by_library_and_file_hash/find_by_library_and_client_upload_id 命中，
     直接复用并补齐字段（避免 pre-create + complete 重复建两条）。
+
+    Issue #1776: 素材库计数由 asset_repository.create() 自动维护。
     """
     # 1. 按 client_upload_id / file_hash 查找现有记录
     existing = None
@@ -389,6 +391,7 @@ async def prepare_direct_upload(
                 file_size=request.file_size,
             )
             pending_asset_id = pending.id
+            # Issue #1776: 计数由 asset_repository.create() 自动维护
         except Exception as error:
             # 预建失败不阻塞签名：complete 仍可按 OSS 文件 + hash 兜底去重
             logger.warning("预建 asset 占位失败，降级走 old flow: %s", error)
@@ -474,6 +477,7 @@ async def complete_direct_upload(
         client_upload_id=request.client_upload_id,
         file_size=request.file_size,
     )
+    # Issue #1776: 计数由 asset_repository.create() 自动维护
 
     job = _submit_ingest_job(
         project_id=request.project_id,
@@ -568,6 +572,7 @@ async def upload_asset(
         file_hash=file_hash,
         client_upload_id=client_upload_id,
     )
+    # Issue #1776: 计数由 asset_repository.create() 自动维护
 
     job = _submit_ingest_job(
         project_id=project_id,

apps/api/app/schemas/ai_avatar_render.py

@@ -0,0 +1,111 @@
+"""AI数字人渲染合成管线 API Schema — #1798."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Any, Optional
+
+from pydantic import BaseModel, Field, field_validator
+
+
+class BRollSegment(BaseModel):
+    """B-roll 片段配置."""
+
+    script_segment_index: int = Field(..., ge=0, description="对应文案片段索引")
+    asset_url: str = Field(..., description="B-roll 素材 URL")
+    mode: str = Field(..., description="插入模式: fullscreen 或 pip")
+    start_time: float = Field(..., ge=0.0, description="在对口型视频中的起始时间(秒)")
+    end_time: float = Field(..., ge=0.0, description="在对口型视频中的结束时间(秒)")
+    pip_position: Optional[str] = Field("bottom_right", description="pip 模式位置")
+    pip_scale: Optional[float] = Field(0.3, ge=0.05, le=1.0, description="pip 模式缩放比例")
+
+    @field_validator("mode")
+    @classmethod
+    def validate_mode(cls, v: str) -> str:
+        v = v.strip().lower()
+        if v not in ("fullscreen", "pip"):
+            raise ValueError("mode 必须为 fullscreen 或 pip")
+        return v
+
+    @field_validator("asset_url")
+    @classmethod
+    def validate_asset_url(cls, v: str) -> str:
+        v = v.strip()
+        if not v:
+            raise ValueError("asset_url 不能为空")
+        if not v.startswith(("http://", "https://")):
+            raise ValueError("asset_url 必须是 HTTP/HTTPS URL")
+        return v
+
+    @field_validator("end_time")
+    @classmethod
+    def validate_end_time(cls, v: float, info: Any) -> float:
+        start = info.data.get("start_time", 0.0)
+        if v <= start:
+            raise ValueError("end_time 必须大于 start_time")
+        return v
+
+
+class CreateAiAvatarRenderRequest(BaseModel):
+    """创建渲染任务请求."""
+
+    lipsync_job_id: str = Field(..., description="对口型任务 ID")
+    script_id: str = Field(..., description="文案 ID")
+    b_roll_segments: list[BRollSegment] = Field(default_factory=list, description="B-roll 片段列表")
+    title_config: dict[str, Any] = Field(default_factory=dict, description="标题配置")
+    cover_config: dict[str, Any] = Field(default_factory=dict, description="封面配置")
+    project_id: str = Field("", description="项目 ID")
+
+    @field_validator("lipsync_job_id")
+    @classmethod
+    def validate_lipsync_job_id(cls, v: str) -> str:
+        v = v.strip()
+        if not v:
+            raise ValueError("lipsync_job_id 不能为空")
+        return v
+
+    @field_validator("script_id")
+    @classmethod
+    def validate_script_id(cls, v: str) -> str:
+        v = v.strip()
+        if not v:
+            raise ValueError("script_id 不能为空")
+        return v
+
+
+class AiAvatarRenderJobResponse(BaseModel):
+    """渲染任务响应."""
+
+    id: str
+    user_id: str
+    project_id: str
+    lipsync_job_id: str
+    script_id: str
+    b_roll_segments: list[dict[str, Any]]
+    title_config: dict[str, Any]
+    cover_config: dict[str, Any]
+    status: str
+    progress: int
+    output_video_url: str
+    output_cover_url: str
+    output_duration: float
+    error_message: str
+    submitted_at: Optional[datetime] = None
+    started_at: Optional[datetime] = None
+    completed_at: Optional[datetime] = None
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class AiAvatarRenderProgressResponse(BaseModel):
+    """渲染进度响应."""
+
+    status: str
+    progress: int
+    output_video_url: str
+    output_cover_url: str
+    output_duration: float
+    error_message: str

apps/api/app/schemas/generation_task.py

@@ -36,9 +36,13 @@ class CreateGenerationTaskRequest(BaseModel):
     template_id: str = ""
     asset_ids: list[str] = Field(default_factory=list)
     title_ids: list[str] = Field(default_factory=list)
-    voice_ids: list[str] = Field(default_factory=list)
     # ── 来源剪辑计划 ──
     source_edit_plan_id: str = ""
+    # ── variant-plans 轻量选片回传（#1749）：正式生成直接复用，不再重选 ──
+    variant_plan_ids: list[str] = Field(
+        default_factory=list,
+        description="POST /generation/variant-plans 返回的各变体 plan_id（长度须=count）；为空则走服务端选片",
+    )
     # ── 标题配置（结构化）──
     title_config: dict | None = Field(
         default=None,
@@ -96,11 +100,31 @@ class CreateGenerationTaskRequest(BaseModel):
 
     @model_validator(mode="after")
     def _check_variant_arrays(self) -> "CreateGenerationTaskRequest":
-        """变体数组字段长度校验：空数组（回退单值）、长度 1（共用）、或长度 = count（独立）。"""
-        for name in ("voice_library_ids", "cover_urls", "titles"):
+        """变体数组字段长度校验 + #1749 配音严格守卫。
+
+        - cover_urls/titles：空（回退单值）、长度 1（共用）或长度 = count（独立）；
+        - voice_library_ids：独立配音长度必须恰好 = count 且逐项非空，禁止静默 fallback
+          （长度 1 的"共用"场景请用 voice_library_id 单值字段）；
+        - variant_plan_ids：非空时长度必须 = count。
+        """
+        for name in ("cover_urls", "titles"):
             arr = getattr(self, name)
             if arr and len(arr) != 1 and len(arr) != self.count:
                 raise ValueError(f"{name} 长度必须为 1（共用）或 {self.count}（与 count 一致），当前为 {len(arr)}")
+
+        from packages.domain.variant_voice_resolver import VariantVoiceError, resolve_variant_voice_ids
+
+        try:
+            resolve_variant_voice_ids(
+                count=self.count,
+                voice_library_id=self.voice_library_id,
+                voice_library_ids=self.voice_library_ids or None,
+            )
+        except VariantVoiceError as exc:
+            raise ValueError(str(exc)) from exc
+
+        if self.variant_plan_ids and len(self.variant_plan_ids) != self.count:
+            raise ValueError(f"variant_plan_ids 长度({len(self.variant_plan_ids)})必须与 count({self.count})一致")
         return self
 
     @model_validator(mode="after")
@@ -110,9 +134,9 @@ class CreateGenerationTaskRequest(BaseModel):
         if not has_project and not has_template:
             raise ValueError("project_id 或 template_id 至少需要提供一个")
         has_library = bool(self.asset_library_id.strip())
-        has_assets = bool(self.asset_ids or self.title_ids or self.voice_ids)
+        has_assets = bool(self.asset_ids or self.title_ids)
         if not has_library and not has_assets:
-            raise ValueError("asset_library_id 或 asset_ids/title_ids/voice_ids 至少需要提供一个")
+            raise ValueError("asset_library_id 或 asset_ids/title_ids 至少需要提供一个")
         return self
 
 
@@ -189,7 +213,6 @@ class CreatePreviewGenerationTaskRequest(BaseModel):
     template_id: str
     asset_ids: list[str] = Field(default_factory=list)
     title_ids: list[str] = Field(default_factory=list)
-    voice_ids: list[str] = Field(default_factory=list)
     voice_library_id: str = Field(
         default="", description="配音素材库ID（用户上传的音频或AI配音），对应配音选择页面选择的配音素材"
     )
@@ -231,13 +254,24 @@ class CreatePreviewGenerationTaskRequest(BaseModel):
 
     @model_validator(mode="after")
     def _check_variant_arrays(self) -> "CreatePreviewGenerationTaskRequest":
-        """变体数组字段长度校验：空数组（回退单值）、长度 1（共用）、或长度 = preview_count（独立）。"""
-        for name in ("titles", "voice_library_ids", "cover_urls"):
+        """变体数组字段长度校验 + #1749 配音严格守卫。"""
+        for name in ("titles", "cover_urls"):
             arr = getattr(self, name)
             if arr and len(arr) != 1 and len(arr) != self.preview_count:
                 raise ValueError(
                     f"{name} 长度必须为 1（共用）或 {self.preview_count}（与 preview_count 一致），当前为 {len(arr)}"
                 )
+
+        from packages.domain.variant_voice_resolver import VariantVoiceError, resolve_variant_voice_ids
+
+        try:
+            resolve_variant_voice_ids(
+                count=self.preview_count,
+                voice_library_id=self.voice_library_id,
+                voice_library_ids=self.voice_library_ids or None,
+            )
+        except VariantVoiceError as exc:
+            raise ValueError(str(exc)) from exc
         return self
 
     @model_validator(mode="after")
@@ -248,8 +282,8 @@ class CreatePreviewGenerationTaskRequest(BaseModel):
 
     @model_validator(mode="after")
     def _check_asset_ids(self) -> "CreatePreviewGenerationTaskRequest":
-        if not self.asset_ids and not self.title_ids and not self.voice_ids:
-            raise ValueError("asset_ids/title_ids/voice_ids 至少需要提供一个")
+        if not self.asset_ids and not self.title_ids:
+            raise ValueError("asset_ids/title_ids 至少需要提供一个")
         return self
 
 

apps/api/app/schemas/lipsync.py

@@ -0,0 +1,70 @@
+"""对口型 API Schema 定义 — #1796."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, Field, field_validator
+
+
+class LipsyncJobResponse(BaseModel):
+    """对口型任务响应."""
+
+    id: str
+    user_id: str
+    project_id: str
+    video_url: str
+    audio_url: str
+    enable_video_loop: bool
+    mediakit_task_id: str
+    status: str
+    output_video_url: str
+    output_duration: float
+    error_message: str
+    error_code: str
+    submitted_at: Optional[datetime] = None
+    completed_at: Optional[datetime] = None
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class CreateLipsyncJobRequest(BaseModel):
+    """创建对口型任务请求."""
+
+    video_url: str = Field(..., description="人物视频 URL（MP4，≤30min，单人真人）")
+    audio_url: str = Field(..., description="驱动音频 URL（mp3/aac/wav/m4a/flac）")
+    enable_video_loop: bool = Field(False, description="音频长于视频时是否循环画面")
+    project_id: str = Field("", description="项目 ID（可选）")
+
+    @field_validator("video_url")
+    @classmethod
+    def validate_video_url(cls, v: str) -> str:
+        v = v.strip()
+        if not v:
+            raise ValueError("video_url 不能为空")
+        if not v.startswith(("http://", "https://")):
+            raise ValueError("video_url 必须是 HTTP/HTTPS URL")
+        # 仅支持 MP4
+        lower = v.lower().split("?")[0]
+        if not lower.endswith(".mp4"):
+            raise ValueError("video_url 仅支持 MP4 格式")
+        return v
+
+    @field_validator("audio_url")
+    @classmethod
+    def validate_audio_url(cls, v: str) -> str:
+        v = v.strip()
+        if not v:
+            raise ValueError("audio_url 不能为空")
+        if not v.startswith(("http://", "https://")):
+            raise ValueError("audio_url 必须是 HTTP/HTTPS URL")
+        # 支持的音频格式
+        lower = v.lower().split("?")[0]
+        allowed_exts = (".mp3", ".aac", ".wav", ".m4a", ".flac")
+        if not any(lower.endswith(ext) for ext in allowed_exts):
+            raise ValueError(f"audio_url 格式不支持，仅支持: {', '.join(allowed_exts)}")
+        return v

apps/api/app/schemas/script.py

@@ -0,0 +1,45 @@
+"""Script (口播文案库) Pydantic schemas — Issue #1795."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from typing import List, Optional
+
+from pydantic import BaseModel, Field
+
+
+class ScriptSegment(BaseModel):
+    """单段文案."""
+
+    text: str
+    duration: Optional[float] = None
+
+
+class ScriptResponse(BaseModel):
+    id: str
+    user_id: str
+    title: str
+    content: str
+    segments: List[ScriptSegment] = Field(default_factory=list)
+    tags: List[str] = Field(default_factory=list)
+    created_at: datetime
+    updated_at: datetime
+
+
+class ScriptListResponse(BaseModel):
+    items: list[ScriptResponse]
+    total: int = 0
+
+
+class CreateScriptRequest(BaseModel):
+    title: str = Field(..., min_length=1, max_length=255)
+    content: str = ""
+    segments: List[ScriptSegment] = Field(default_factory=list)
+    tags: List[str] = Field(default_factory=list)
+
+
+class UpdateScriptRequest(BaseModel):
+    title: Optional[str] = Field(None, min_length=1, max_length=255)
+    content: Optional[str] = None
+    segments: Optional[List[ScriptSegment]] = None
+    tags: Optional[List[str]] = None

apps/api/app/services/ai_avatar_render_service.py

@@ -0,0 +1,377 @@
+"""AI数字人渲染合成 Service — #1798.
+
+职责：
+- 创建/查询/取消渲染任务
+- 调用 Celery 异步任务执行渲染
+- B-roll 合成 + 标题叠加 + 封面提取
+- 用户隔离
+"""
+
+from __future__ import annotations
+
+import logging
+import os
+import tempfile
+import uuid
+from datetime import datetime, timezone
+from typing import Any, Optional
+
+from sqlalchemy.orm import Session
+
+from packages.adapters.sqlalchemy_impl.models import (
+    AiAvatarRenderJob,
+    LipsyncJobModel,
+    ScriptModel,
+)
+from packages.domain.video_filter_builder import (
+    build_cover_extract_command,
+    build_title_drawtext_filter,
+)
+from packages.shared.storage import get_shared_storage_service
+
+logger = logging.getLogger(__name__)
+
+
+class AiAvatarRenderError(Exception):
+    """渲染服务异常."""
+
+    def __init__(self, message: str, code: str = "RenderError"):
+        self.code = code
+        super().__init__(message)
+
+
+class AiAvatarRenderService:
+    """AI数字人渲染合成 Service."""
+
+    def __init__(self, db: Session):
+        self.db = db
+
+    # ── 创建任务 ──────────────────────────────────────────────────────────
+
+    def create_render_job(
+        self,
+        *,
+        user_id: str,
+        lipsync_job_id: str,
+        script_id: str,
+        b_roll_segments: list[dict[str, Any]],
+        title_config: dict[str, Any],
+        cover_config: dict[str, Any],
+        project_id: str = "",
+    ) -> AiAvatarRenderJob:
+        """创建渲染任务.
+
+        Raises:
+            AiAvatarRenderError: 校验失败
+        """
+        # 1. 验证对口型任务
+        lipsync_job = (
+            self.db.query(LipsyncJobModel)
+            .filter(
+                LipsyncJobModel.id == lipsync_job_id,
+                LipsyncJobModel.user_id == user_id,
+            )
+            .first()
+        )
+        if lipsync_job is None:
+            raise AiAvatarRenderError("对口型任务不存在", code="LipsyncJobNotFound")
+        if lipsync_job.status != "completed":
+            raise AiAvatarRenderError(
+                f"对口型任务状态为 {lipsync_job.status}，仅 completed 状态可渲染",
+                code="LipsyncJobNotCompleted",
+            )
+        if not lipsync_job.output_video_url:
+            raise AiAvatarRenderError("对口型任务输出视频 URL 为空", code="LipsyncJobNoOutput")
+
+        # 2. 验证文案归属
+        script = (
+            self.db.query(ScriptModel)
+            .filter(
+                ScriptModel.id == script_id,
+                ScriptModel.user_id == user_id,
+            )
+            .first()
+        )
+        if script is None:
+            raise AiAvatarRenderError("文案不存在或无权访问", code="ScriptNotFound")
+
+        # 3. 创建渲染任务
+        job_id = str(uuid.uuid4())
+        job = AiAvatarRenderJob(
+            id=job_id,
+            user_id=user_id,
+            project_id=project_id,
+            lipsync_job_id=lipsync_job_id,
+            script_id=script_id,
+            b_roll_segments=[s if isinstance(s, dict) else s.model_dump() for s in b_roll_segments],
+            title_config=title_config,
+            cover_config=cover_config,
+            status="pending",
+        )
+        self.db.add(job)
+        self.db.flush()
+
+        job.submitted_at = datetime.now(timezone.utc)
+        self.db.commit()
+        self.db.refresh(job)
+        return job
+
+    # ── 查询任务 ──────────────────────────────────────────────────────────
+
+    def get_render_job(self, job_id: str, user_id: str) -> Optional[AiAvatarRenderJob]:
+        """获取渲染任务详情（用户隔离）."""
+        return (
+            self.db.query(AiAvatarRenderJob)
+            .filter(
+                AiAvatarRenderJob.id == job_id,
+                AiAvatarRenderJob.user_id == user_id,
+            )
+            .first()
+        )
+
+    def list_render_jobs(
+        self,
+        *,
+        user_id: str,
+        project_id: str = "",
+        status: str = "",
+        offset: int = 0,
+        limit: int = 20,
+    ) -> tuple[list[AiAvatarRenderJob], int]:
+        """获取渲染任务列表（分页 + 用户隔离）."""
+        query = self.db.query(AiAvatarRenderJob).filter(AiAvatarRenderJob.user_id == user_id)
+        if project_id:
+            query = query.filter(AiAvatarRenderJob.project_id == project_id)
+        if status:
+            query = query.filter(AiAvatarRenderJob.status == status)
+
+        total = query.count()
+        items = query.order_by(AiAvatarRenderJob.created_at.desc()).offset(offset).limit(limit).all()
+        return items, total
+
+    # ── 取消任务 ──────────────────────────────────────────────────────────
+
+    def cancel_render_job(self, job_id: str, user_id: str) -> Optional[AiAvatarRenderJob]:
+        """取消渲染任务（仅 pending 状态可取消）."""
+        job = self.get_render_job(job_id, user_id)
+        if job is None:
+            return None
+        if job.status in ("pending", "submitted"):
+            job.status = "cancelled"
+            job.updated_at = datetime.now(timezone.utc)
+            self.db.commit()
+            self.db.refresh(job)
+        return job
+
+    # ── 重试任务 ──────────────────────────────────────────────────────────
+
+    def retry_render_job(self, job_id: str, user_id: str) -> Optional[AiAvatarRenderJob]:
+        """重试失败的渲染任务."""
+        job = self.get_render_job(job_id, user_id)
+        if job is None:
+            return None
+        if job.status != "failed":
+            return None
+        job.status = "pending"
+        job.progress = 0
+        job.error_message = ""
+        job.output_video_url = ""
+        job.output_cover_url = ""
+        job.output_duration = 0.0
+        job.started_at = None
+        job.completed_at = None
+        job.updated_at = datetime.now(timezone.utc)
+        self.db.commit()
+        self.db.refresh(job)
+        return job
+
+    # ── 执行渲染（Celery 异步调用） ──────────────────────────────────────
+
+    def execute_render(self, job_id: str) -> None:
+        """执行渲染管线.
+
+        由 Celery 异步任务调用，流程:
+        1. 下载对口型输出视频 (20%)
+        2. 构建 FFmpeg 滤镜链 (40%)
+        3. 执行 FFmpeg 渲染 (80%)
+        4. 提取封面 (90%)
+        5. 上传到 OSS (95%)
+        6. 更新任务状态 (100%)
+        """
+        job = self.db.query(AiAvatarRenderJob).filter(AiAvatarRenderJob.id == job_id).first()
+        if job is None:
+            logger.error("渲染任务不存在: %s", job_id)
+            return
+
+        if job.status == "cancelled":
+            logger.info("渲染任务已取消: %s", job_id)
+            return
+
+        try:
+            # 更新状态为 processing
+            job.status = "processing"
+            job.started_at = datetime.now(timezone.utc)
+            job.progress = 5
+            job.updated_at = datetime.now(timezone.utc)
+            self.db.commit()
+
+            # 获取对口型任务信息
+            lipsync_job = self.db.query(LipsyncJobModel).filter(LipsyncJobModel.id == job.lipsync_job_id).first()
+            if lipsync_job is None:
+                raise AiAvatarRenderError("关联的对口型任务不存在", code="LipsyncJobNotFound")
+
+            # 1. 下载对口型输出视频 (20%)
+            input_video_path = self._download_video(lipsync_job.output_video_url)
+            job.progress = 20
+            self.db.commit()
+
+            # 2. 构建 FFmpeg 滤镜链 (40%)
+            from packages.domain.video_filter_builder import build_broll_overlay_filter
+
+            filter_complex = build_broll_overlay_filter(
+                b_roll_segments=job.b_roll_segments,
+                video_duration=lipsync_job.output_duration,
+            )
+
+            # 标题叠加
+            title_filter = build_title_drawtext_filter(job.title_config)
+            if title_filter:
+                if filter_complex:
+                    filter_complex += f"[vout]{title_filter}[vout_titled];"
+                else:
+                    filter_complex = f"[0:v]{title_filter}[vout_titled];"
+
+            # 清理末尾分号
+            if filter_complex.endswith(";"):
+                filter_complex = filter_complex[:-1]
+
+            # 最终输出标签
+            final_label = "vout_titled" if title_filter else ("vout" if filter_complex else None)
+
+            job.progress = 40
+            self.db.commit()
+
+            # 3. 执行 FFmpeg 渲染 (80%)
+            with tempfile.TemporaryDirectory() as tmpdir:
+                output_video_path = os.path.join(tmpdir, "output.mp4")
+
+                cmd = self._build_ffmpeg_command(
+                    input_video=input_video_path,
+                    b_roll_segments=job.b_roll_segments,
+                    filter_complex=filter_complex,
+                    final_label=final_label,
+                    output_path=output_video_path,
+                )
+
+                exit_code = os.system(cmd)
+                if exit_code != 0:
+                    raise AiAvatarRenderError(f"FFmpeg 渲染失败，退出码: {exit_code}", code="FFmpegFailed")
+
+                job.progress = 80
+                self.db.commit()
+
+                # 4. 提取封面 (90%)
+                cover_path = ""
+                if job.cover_config:
+                    cover_path = os.path.join(tmpdir, "cover.jpg")
+                    cover_cmd = build_cover_extract_command(job.cover_config, cover_path)
+                    cover_cmd = cover_cmd.replace("INPUT_VIDEO", output_video_path)
+                    cover_exit = os.system(cover_cmd)
+                    if cover_exit != 0:
+                        logger.warning("封面提取失败，跳过: %s", cover_cmd)
+                        cover_path = ""
+
+                job.progress = 90
+                self.db.commit()
+
+                # 5. 上传到 OSS (95%)
+                output_video_url = self._upload_to_oss(output_video_path, f"ai-avatar/{job_id}/output.mp4")
+                job.output_video_url = output_video_url
+
+                if cover_path:
+                    output_cover_url = self._upload_to_oss(cover_path, f"ai-avatar/{job_id}/cover.jpg")
+                    job.output_cover_url = output_cover_url
+
+                # 获取输出视频时长
+                job.output_duration = lipsync_job.output_duration
+                job.progress = 95
+                self.db.commit()
+
+            # 6. 完成
+            job.status = "completed"
+            job.progress = 100
+            job.completed_at = datetime.now(timezone.utc)
+            job.updated_at = datetime.now(timezone.utc)
+            self.db.commit()
+            logger.info("渲染任务完成: %s", job_id)
+
+        except AiAvatarRenderError as exc:
+            job.status = "failed"
+            job.error_message = str(exc)
+            job.updated_at = datetime.now(timezone.utc)
+            self.db.commit()
+            logger.error("渲染任务失败 [%s]: %s", job_id, exc)
+        except Exception as exc:
+            job.status = "failed"
+            job.error_message = f"渲染异常: {str(exc)}"
+            job.updated_at = datetime.now(timezone.utc)
+            self.db.commit()
+            logger.exception("渲染任务异常 [%s]", job_id)
+
+    def _download_video(self, url: str) -> str:
+        """下载视频到临时文件."""
+        import httpx
+
+        tmp = tempfile.NamedTemporaryFile(suffix=".mp4", delete=False)
+        try:
+            with httpx.Client(timeout=120) as client:
+                resp = client.get(url)
+                resp.raise_for_status()
+                tmp.write(resp.content)
+            return tmp.name
+        except Exception:
+            if os.path.exists(tmp.name):
+                os.unlink(tmp.name)
+            raise
+
+    def _build_ffmpeg_command(
+        self,
+        *,
+        input_video: str,
+        b_roll_segments: list[dict[str, Any]],
+        filter_complex: str,
+        final_label: Optional[str],
+        output_path: str,
+    ) -> str:
+        """构建 FFmpeg 命令."""
+        # 输入文件
+        inputs = f"-i {input_video}"
+        for seg in b_roll_segments:
+            asset_url = seg.get("asset_url", "")
+            if asset_url:
+                inputs += f" -i {asset_url}"
+
+        # 滤镜
+        if filter_complex and final_label:
+            filter_arg = f'-filter_complex "{filter_complex}" -map "[{final_label}]"'
+        elif filter_complex:
+            filter_arg = f'-filter_complex "{filter_complex}"'
+        else:
+            filter_arg = ""
+
+        return f"ffmpeg {inputs} {filter_arg} -c:v libx264 -preset fast -crf 23 -y {output_path}"
+
+    def _upload_to_oss(self, local_path: str, oss_key: str) -> str:
+        """上传文件到 OSS，返回 URL.
+
+        使用 SharedStorageService 统一存储服务。
+        """
+        storage = get_shared_storage_service()
+        url = storage.upload_file_smart(local_path, oss_key)
+        if url is None:
+            raise AiAvatarRenderError(
+                f"上传文件到 OSS 失败: {oss_key}",
+                code="OSSUploadFailed",
+            )
+        logger.info("上传文件到 OSS 成功: %s -> %s", local_path, url)
+        return url

apps/api/app/services/edit_plan_service.py

@@ -409,8 +409,13 @@ class EditPlanService:
                     clip_type=clip_item.get("clip_type", "main"),
                     order=order,
                     asset_id=clip_item.get("asset_id", ""),
+                    text_content=clip_item.get("text_content", ""),
                     start_time=clip_item.get("start_time", 0.0),
                     duration=clip_item.get("duration", 0.0),
+                    transition_effect=clip_item.get("transition_effect", "cut"),
+                    transition_duration=clip_item.get("transition_duration", 0.0),
+                    playback_speed=clip_item.get("playback_speed", 1.0),
+                    config=clip_item.get("config") or None,
                 )
                 model = EditPlanClipModel(
                     id=clip.id,
@@ -459,6 +464,159 @@ class EditPlanService:
             logger.exception("事务性替换片段失败: plan_id=%s", plan_id)
             raise
 
+    def reselect_plan_for_variant(
+        self,
+        source_plan_id: str,
+        candidate_asset_ids: list[str],
+        *,
+        created_by_user_id: str = "",
+        name_suffix: str = "变体",
+        voice_duration: float = 0.0,
+        rng=None,
+    ) -> EditPlan:
+        """为批量变体生成独立 plan：完整重跑单视频选片流程（#1743）。
+
+        与 clone_plan_for_variant（只重算起点、素材/顺序不变）不同，本方法：
+        - 源 plan 片段骨架（clip_type/order/duration/文案/转场）保留；
+        - 素材池 shuffle 随机分配 + main 片段顺序洗牌；
+        - 起点走场景镜头洗牌/随机起点/历史区间避让（与单视频同一入口）；
+        - 批次内同素材区间重叠 >20% 自动重选起点；
+        - 新片段区间 record_used_segments 写回素材 metadata（跨变体/跨任务避让）。
+
+        Args:
+            source_plan_id: 源 plan（任务 0 / 预览源）。
+            candidate_asset_ids: 素材池（源 plan 素材 ∪ 批次素材）。
+            created_by_user_id: 新 plan 归属用户。
+            name_suffix: plan 名后缀。
+            rng: 可选随机数（测试注入种子）。
+
+        Raises:
+            ValueError: 源 plan 不存在/无片段、素材池为空或时长全未知。
+        """
+        from packages.adapters.sqlalchemy_impl.models import AssetModel
+        from packages.domain.plan_generator_utils import extract_scene_points_from_metadata
+        from packages.domain.variant_plan_selector import reselect_clips_for_variant
+
+        source = self.get_plan_or_raise(source_plan_id)
+
+        # 分页读取源 plan 全部片段
+        clips: List[EditPlanClip] = []
+        skip, page = 0, 500
+        while True:
+            batch = self._clip_repo.list_by_plan(source_plan_id, skip=skip, limit=page)
+            if not batch:
+                break
+            clips.extend(batch)
+            if len(batch) < page:
+                break
+            skip += page
+        if not clips:
+            raise ValueError(f"源 plan 无片段，无法生成变体: {source_plan_id}")
+
+        source_clips_data: list[dict[str, Any]] = [
+            {
+                "order": c.order if c.order is not None else i,
+                "asset_id": c.asset_id,
+                "start_time": float(c.start_time or 0.0),
+                "duration": float(c.duration or 0.0),
+                "clip_type": c.clip_type,
+                "playback_speed": float(c.playback_speed or 1.0),
+                "transition_effect": c.transition_effect,
+                "transition_duration": float(c.transition_duration or 0.0),
+                "text_content": c.text_content or "",
+                "config": c.config or {},
+            }
+            for i, c in enumerate(clips)
+        ]
+
+        db = self._clip_repo.session
+
+        # #1749：配音时长 → 每段目标段长（片段数=模板片段数定死；素材不足由渲染末帧冻结铺满）
+        target_durations: list[float] | None = None
+        try:
+            voice = float(voice_duration or 0.0)
+        except (TypeError, ValueError):
+            voice = 0.0
+        if voice > 0 and source_clips_data:
+            from packages.domain.voice_duration_planner import plan_clip_durations
+
+            _effects: list[str | None] = [c.get("transition_effect") for c in source_clips_data]
+            _tdurs: list[float] = [float(c.get("transition_duration") or 0.0) for c in source_clips_data]
+            target_durations = plan_clip_durations(
+                len(source_clips_data),
+                voice,
+                transition_effects=_effects,
+                transition_durations=_tdurs,
+            )
+            if target_durations:
+                for _c, _d in zip(source_clips_data, target_durations, strict=False):
+                    _c["duration"] = _d
+
+        # 素材池 = 源 plan 素材 ∪ 调用方传入素材（去重保序）
+        pool_ids: list[str] = []
+        seen = set()
+        for aid in [c.asset_id for c in clips if c.asset_id] + list(candidate_asset_ids or []):
+            if aid and aid not in seen:
+                seen.add(aid)
+                pool_ids.append(aid)
+
+        # 时长 + 场景点
+        durations: dict[str, float] = {}
+        scene_points: dict[str, list[float]] = {}
+        if pool_ids:
+            for m in db.query(AssetModel).filter(AssetModel.id.in_(pool_ids)).all():
+                durations[m.id] = float(getattr(m, "duration", 0.0) or 0.0)
+                pts = extract_scene_points_from_metadata(getattr(m, "metadata", None))
+                if pts:
+                    scene_points[m.id] = pts
+
+        historical = get_used_segments(db, pool_ids)
+
+        # 创建新 plan（复制模板归属与 config）
+        new_plan = self.create_plan(
+            template_id=source.template_id,
+            name=f"{source.name or '剪辑计划'} · {name_suffix}",
+            config=dict(source.config or {}),
+            total_duration=source.total_duration,
+            project_id=source.project_id or "",
+            created_by_user_id=created_by_user_id or (source.created_by_user_id or ""),
+        )
+
+        # 批次内区间：以源 plan（变体 0）片段为初始避让对象
+        batch_segments: dict[str, list[tuple[float, float]]] = {}
+        for c in clips:
+            if c.asset_id and float(c.duration or 0) > 0:
+                st = float(c.start_time or 0.0)
+                batch_segments.setdefault(c.asset_id, []).append((st, st + float(c.duration)))
+
+        clips_data = reselect_clips_for_variant(
+            source_clips_data,
+            pool_ids,
+            asset_durations=durations,
+            asset_scene_points=scene_points,
+            historical_used_segments=historical,
+            batch_segments=batch_segments,
+            target_durations=target_durations,
+            rng=rng,
+        )
+
+        # 片段区间写回素材 metadata（与落库同事务；replace_all_clips_transactional 内 commit）
+        for item in clips_data:
+            aid = item.get("asset_id", "")
+            if aid:
+                st = float(item.get("start_time", 0.0))
+                record_used_segments(db, aid, st, st + float(item.get("duration", 0.0)), new_plan.id)
+
+        self.replace_all_clips_transactional(new_plan.id, clips_data)
+        logger.info(
+            "变体独立选片完成: source=%s new=%s clips=%d assets=%d",
+            source_plan_id,
+            new_plan.id,
+            len(clips_data),
+            len(pool_ids),
+        )
+        return new_plan
+
     def clone_plan_for_variant(
         self,
         source_plan_id: str,
@@ -569,6 +727,268 @@ class EditPlanService:
         )
         return new_plan
 
+    # ── #1749 配音时长分配 / 素材时长查询 / 批量变体 plan 确保 ──────────────
+
+    def get_asset_durations(self, asset_ids: list[str]) -> dict[str, float]:
+        """批量查询素材时长（秒），O(N) 单查；缺失/异常返回 0.0。"""
+        from packages.adapters.sqlalchemy_impl.models import AssetModel
+
+        ids = [a for a in dict.fromkeys(asset_ids or []) if a]
+        if not ids:
+            return {}
+        db = self._clip_repo.session
+        out: dict[str, float] = {}
+        for m in db.query(AssetModel).filter(AssetModel.id.in_(ids)).all():
+            try:
+                out[m.id] = float(getattr(m, "duration", 0.0) or 0.0)
+            except (TypeError, ValueError):
+                out[m.id] = 0.0
+        return out
+
+    def apply_voice_duration_to_plan(self, plan_id: str, voice_duration: float) -> Optional[EditPlan]:
+        """把配音时长分配到 plan 的每段（#1749）。
+
+        - 片段数保持不变（= 模板片段数，定死）；
+        - 每段 duration 按 voice_duration_planner 分配（含转场重叠扣减）；
+        - 素材短于段长 → start_time 钳制为 0（末帧冻结由渲染侧 tpad/apad 铺满）；
+        - plan.total_duration 回写为成片净时长（≈ 配音时长）；
+        - 幂等：配音时长相同则分配结果不变，可重复调用。
+
+        无配音（<=0）或无片段时直接返回 None，不报错。
+        """
+        try:
+            voice = float(voice_duration or 0.0)
+        except (TypeError, ValueError):
+            return None
+        if voice <= 0:
+            return None
+
+        plan = self.get_plan(plan_id)
+        if plan is None:
+            return None
+
+        clips: List[EditPlanClip] = []
+        skip, page = 0, 500
+        while True:
+            batch = self._clip_repo.list_by_plan(plan_id, skip=skip, limit=page)
+            if not batch:
+                break
+            clips.extend(batch)
+            if len(batch) < page:
+                break
+            skip += page
+        if not clips:
+            return None
+
+        clips.sort(key=lambda c: (c.order if c.order is not None else 0))
+
+        from packages.domain.voice_duration_planner import plan_clip_durations, total_output_duration
+
+        # #1764：从 plan config 读取节奏模板
+        rhythm_template = None
+        if plan and hasattr(plan, "config") and plan.config:
+            rhythm_template = plan.config.get("rhythm_template")
+
+        # #1768：先获取素材时长，传入 plan_clip_durations 用于最大片段钳制
+        asset_ids = [c.asset_id for c in clips if c.asset_id]
+        durations = self.get_asset_durations(asset_ids)
+        asset_durations_for_plan = [durations.get(c.asset_id, 0.0) for c in clips]
+
+        target = plan_clip_durations(
+            len(clips),
+            voice,
+            transition_effects=[c.transition_effect for c in clips],
+            transition_durations=[float(c.transition_duration or 0.0) for c in clips],
+            rhythm_template=rhythm_template,
+            asset_durations=asset_durations_for_plan,
+        )
+        if not target:
+            return None
+
+        clips_data: list[dict] = []
+        for i, c in enumerate(clips):
+            dur = float(target[i])
+            total = durations.get(c.asset_id, 0.0)
+            start = float(c.start_time or 0.0)
+            if c.asset_id and total > 0:
+                # 素材短于段长：起点钳 0，段长超出部分渲染侧末帧冻结
+                max_start = max(0.0, total - min(dur, total))
+                start = min(start, max_start)
+            clips_data.append(
+                {
+                    "order": c.order if c.order is not None else i,
+                    "asset_id": c.asset_id or "",
+                    "start_time": round(start, 3),
+                    "duration": dur,
+                    "clip_type": c.clip_type,
+                    "playback_speed": float(c.playback_speed or 1.0),
+                    "transition_effect": c.transition_effect,
+                    "transition_duration": float(c.transition_duration or 0.0),
+                    "text_content": c.text_content or "",
+                    "config": c.config or {},
+                }
+            )
+
+        self.replace_all_clips_transactional(plan_id, clips_data)
+
+        net = total_output_duration(
+            target,
+            transition_effects=[c.transition_effect for c in clips],
+            transition_durations=[float(c.transition_duration or 0.0) for c in clips],
+        )
+        try:
+            plan.total_duration = net
+            db = self._clip_repo.session
+            db.commit()
+        except Exception:
+            db.rollback()
+            logger.exception("回写 plan.total_duration 失败（不阻断）: plan_id=%s", plan_id)
+
+        logger.info(
+            "配音时长分配完成: plan=%s clips=%d voice=%.2fs 成片净时长=%.2fs",
+            plan_id,
+            len(clips),
+            voice,
+            net,
+        )
+        return plan
+
+    def ensure_variant_plans(
+        self,
+        source_plan_id: str,
+        count: int,
+        candidate_asset_ids: list[str],
+        *,
+        created_by_user_id: str = "",
+        voice_durations: Optional[list[float]] = None,
+        rng=None,
+    ) -> list[str]:
+        """确保批量 N 个变体各自拥有独立 plan（#1749 批量正式生成/预览共用）。
+
+        - 变体 0：clone 源 plan（不污染源 plan，片段独立可改），并按配音分配段长；
+        - 变体 1..N-1：reselect_plan_for_variant 完整重跑选片（素材级去重）；
+        - voice_durations：每个变体的配音时长（独立配音各自时长；统一配音同值）；
+          缺省/为 0 时不分配（段长保持骨架/模板值）。
+
+        Returns:
+            plan_id 列表，长度 == count，index 即 variant_index。
+        """
+        import random as _random
+
+        rng = rng or _random.Random()
+        plan_ids: list[str] = []
+
+        # 变体 0：clone（片段结构同源 plan，起点重算），不污染源 plan
+        plan0 = self.clone_plan_for_variant(
+            source_plan_id,
+            created_by_user_id=created_by_user_id,
+            name_suffix="变体1",
+        )
+        v0_voice = 0.0
+        if voice_durations and len(voice_durations) > 0:
+            try:
+                v0_voice = float(voice_durations[0] or 0.0)
+            except (TypeError, ValueError):
+                v0_voice = 0.0
+        if v0_voice > 0:
+            try:
+                self.apply_voice_duration_to_plan(plan0.id, v0_voice)
+            except Exception:
+                logger.exception("变体0 配音分配失败（不阻断）: plan=%s", plan0.id)
+        plan_ids.append(plan0.id)
+
+        # 变体 1..N-1：独立选片
+        for i in range(1, count):
+            voice = 0.0
+            if voice_durations and i < len(voice_durations):
+                try:
+                    voice = float(voice_durations[i] or 0.0)
+                except (TypeError, ValueError):
+                    voice = 0.0
+            variant = self.reselect_plan_for_variant(
+                source_plan_id,
+                candidate_asset_ids,
+                created_by_user_id=created_by_user_id,
+                name_suffix=f"变体{i + 1}",
+                voice_duration=voice,
+                rng=rng,
+            )
+            plan_ids.append(variant.id)
+
+        # #1764：为每个变体生成独立节奏模板（让批量视频片段时长分布不同）
+        from packages.domain.voice_duration_planner import RHYTHM_TEMPLATES, adapt_template_length
+
+        clip_count = 0
+        if voice_durations and len(voice_durations) > 0:
+            # 从源 plan 获取片段数
+            source_plan = self.get_plan(source_plan_id)
+            if source_plan and hasattr(source_plan, "clips"):
+                clip_count = len(list(source_plan.clips)) if source_plan.clips else 0
+
+        rhythm_templates_for_variants = []
+        if clip_count > 0:
+            for idx in range(len(plan_ids)):
+                # 每个变体用不同的 seed 选择节奏模板
+                variant_seed = rng.randint(0, 999999)
+                template = adapt_template_length(RHYTHM_TEMPLATES[variant_seed % len(RHYTHM_TEMPLATES)], clip_count)
+                rhythm_templates_for_variants.append(template)
+                logger.info("变体 %d 节奏模板: plan=%s template=%s", idx, plan_ids[idx], template)
+
+        # #1767：BGM 池差异化分配（让批量变体使用不同 BGM / 段落 / 音量）
+        from packages.domain.bgm_pool import allocate_bgm_pool_for_variants
+
+        source_bgm_config = {}
+        source_plan = self.get_plan(source_plan_id)
+        if source_plan and source_plan.config:
+            source_bgm_config = source_plan.config.get("bgm", {}) or {}
+
+        variant_seeds_for_bgm = [rng.randint(0, 999999) for _ in plan_ids]
+        bgm_pool_assignments = allocate_bgm_pool_for_variants(source_bgm_config, variant_seeds_for_bgm)
+
+        # 为每个变体生成独立视觉扰动参数（让批量视频画面本身更不同）
+        from packages.domain.variant_plan_selector import generate_visual_perturbation
+
+        for idx, pid in enumerate(plan_ids):
+            try:
+                perturbation = generate_visual_perturbation(rng)
+                # 变体 0 不做 hflip（保持预览 plan 原始画面方向）
+                if idx == 0:
+                    perturbation["hflip"] = False
+                config_update = {"visual_perturbation": perturbation}
+                # #1764：写入节奏模板
+                if idx < len(rhythm_templates_for_variants):
+                    config_update["rhythm_template"] = rhythm_templates_for_variants[idx]
+                # #1765：写入像素级扰动滤镜
+                from packages.domain.variant_plan_selector import generate_pixel_perturbation
+
+                pixel_pert = generate_pixel_perturbation(rng)
+                config_update["pixel_perturbation"] = pixel_pert
+                # #1767：写入 BGM 池分配（覆盖 bgm 配置中的 preset_id / audio_offset / volume_adjust_db）
+                if idx < len(bgm_pool_assignments):
+                    existing_bgm = dict((source_plan.config or {}).get("bgm", {}) or {})
+                    existing_bgm.update(bgm_pool_assignments[idx])
+                    config_update["bgm"] = existing_bgm
+                self.update_plan_config(pid, config_update)
+                logger.info(
+                    "变体 %d 视觉扰动+像素扰动+BGM池: plan=%s vis=%s pix=%s bgm=%s",
+                    idx,
+                    pid,
+                    perturbation,
+                    pixel_pert,
+                    bgm_pool_assignments[idx] if idx < len(bgm_pool_assignments) else None,
+                )
+            except Exception:
+                logger.exception("变体 %d 视觉扰动生成失败（不阻断）: plan=%s", idx, pid)
+
+        # 标记所有变体 plan 的 clips 为 ready（已分配素材+起点，语义上就是 ready）
+        for pid in plan_ids:
+            try:
+                self.mark_clips_ready(pid)
+            except Exception:
+                logger.exception("标记 clips ready 失败（不阻断）: plan=%s", pid)
+
+        return plan_ids
+
     # ── 片段分割与合并 ──────────────────────────────────────────────────────
 
     def split_clip(self, clip_id: str, split_time: float) -> Dict[str, Any]:
@@ -792,7 +1212,7 @@ class EditPlanService:
         config_asset_ids_count = len((plan.config or {}).get("asset_ids", []))
         clips_with_asset_count = sum(1 for c in clips if c.asset_id)
         logger.info(
-            "can_generate 诊断: plan=%s status=%s total_clips=%d " "clips_with_asset=%d config_asset_ids_count=%d",
+            "can_generate 诊断: plan=%s status=%s total_clips=%d clips_with_asset=%d config_asset_ids_count=%d",
             plan_id,
             plan.status,
             len(clips),
@@ -804,7 +1224,7 @@ class EditPlanService:
             config_asset_ids = (plan.config or {}).get("asset_ids", [])
             if config_asset_ids:
                 logger.warning(
-                    "can_generate 最后防线触发: plan=%s clips=%d 均无素材，" "从 config.asset_ids(%d个) 自动分配",
+                    "can_generate 最后防线触发: plan=%s clips=%d 均无素材，从 config.asset_ids(%d个) 自动分配",
                     plan_id,
                     len(clips),
                     len(config_asset_ids),
@@ -836,7 +1256,7 @@ class EditPlanService:
                     return False, "没有可渲染的就绪片段，自动修复后仍未分配素材"
             else:
                 logger.warning(
-                    "can_generate 失败: plan=%s clips=%d 均无素材，" "且 config.asset_ids 为空，无法自动修复",
+                    "can_generate 失败: plan=%s clips=%d 均无素材，且 config.asset_ids 为空，无法自动修复",
                     plan_id,
                     len(clips),
                 )

apps/api/app/services/edit_template_service.py

@@ -34,6 +34,17 @@ from packages.domain.template_clip_converter import (
 logger = logging.getLogger(__name__)
 
 
+class TemplateNotFoundError(Exception):
+    """模板不存在、已删除或当前用户无权访问.
+
+    与"模板存在但无片段配置"区分：路由层应映射为 HTTP 404。
+    """
+
+    def __init__(self, template_id: str) -> None:
+        self.template_id = template_id
+        super().__init__(f"模板不存在: {template_id}")
+
+
 class EditTemplateService:
     """模板管理服务
 
@@ -217,7 +228,14 @@ class EditTemplateService:
         skip: int = 0,
         limit: int = 100,
     ) -> List[TemplateClipConfig]:
-        """列出模板的片段配置"""
+        """列出模板的片段配置
+
+        注意：本方法要求模板存在于新表 ``edit_templates``（全局模板库），
+        主要服务于新模板系统的写入/发布路径。用户自建模板存放在旧表
+        ``templates``，不在 ``edit_templates`` 中，读取其片段配置请改用
+        :meth:`list_clip_configs_for_editor`，后者直接读取片段配置主表
+        ``template_clip_configs``，不依赖新模板主表、也不靠异常降级。
+        """
         # 确保模板存在
         self.get_template_or_raise(template_id)
         return self._clip_config_repo.list_by_template(
@@ -227,6 +245,52 @@ class EditTemplateService:
             limit=limit,
         )
 
+    def list_clip_configs_for_editor(
+        self,
+        template_id: str,
+        user_id: str,
+        *,
+        clip_type: Optional[ClipType] = None,
+        skip: int = 0,
+        limit: int = 100,
+    ) -> List[TemplateClipConfig]:
+        """编辑器读取模板片段配置的单一数据源入口.
+
+        片段配置主表是 ``template_clip_configs``（直接读取，不抛异常、不降级）。
+        模板主表按双表现状显式判定，不使用 try/except 控制流：
+
+        1. 用户自建模板在旧表 ``templates``（归属 user_id）→ 校验归属与未删除后直接读；
+        2. 全局模板在新表 ``edit_templates``（无 user_id，全局可读）→ 直接读；
+        3. 两者都没有 → 模板不存在/无权限，抛 :class:`TemplateNotFoundError`。
+
+        Args:
+            template_id: 模板 ID
+            user_id: 当前登录用户 ID（用于旧表模板归属校验）
+
+        Raises:
+            TemplateNotFoundError: 模板不存在、已删除或不归属于当前用户。
+        """
+        # 1) 用户自建模板（旧表 templates，归属 user_id）
+        if self._clip_config_repo.template_owned_by(template_id, user_id):
+            return self._clip_config_repo.list_by_template(
+                template_id,
+                clip_type=clip_type,
+                skip=skip,
+                limit=limit,
+            )
+
+        # 2) 全局模板（新表 edit_templates，无 user_id，全局可读）
+        if self._template_repo.get(template_id) is not None:
+            return self._clip_config_repo.list_by_template(
+                template_id,
+                clip_type=clip_type,
+                skip=skip,
+                limit=limit,
+            )
+
+        # 3) 两表都没有：不存在 / 已删除 / 无权限
+        raise TemplateNotFoundError(template_id)
+
     def get_clip_config(self, config_id: str) -> Optional[TemplateClipConfig]:
         """获取片段配置详情"""
         return self._clip_config_repo.get(config_id)

apps/api/app/services/lipsync_service.py

@@ -0,0 +1,181 @@
+"""对口型 Service — #1796 MediaKit 对口型业务逻辑.
+
+职责：
+- 创建/查询/取消对口型任务
+- 调用 MediaKit 客户端提交异步任务
+- 轮询更新任务状态
+- 用户隔离（每个用户只能操作自己的任务）
+"""
+
+from __future__ import annotations
+
+import logging
+import uuid
+from datetime import datetime, timezone
+from typing import Optional
+
+from app.services.mediakit_client import (
+    STATUS_COMPLETED,
+    STATUS_FAILED,
+    STATUS_RUNNING,
+    MediaKitClient,
+    MediaKitError,
+    get_mediakit_client,
+)
+from sqlalchemy.orm import Session
+
+from packages.adapters.sqlalchemy_impl.models import LipsyncJobModel
+
+logger = logging.getLogger(__name__)
+
+
+class LipsyncService:
+    """对口型任务 Service."""
+
+    def __init__(self, db: Session, client: Optional[MediaKitClient] = None):
+        self.db = db
+        self.client = client or get_mediakit_client()
+
+    # ── 创建任务 ──────────────────────────────────────────────────────────
+
+    def create_job(
+        self,
+        *,
+        user_id: str,
+        video_url: str,
+        audio_url: str,
+        enable_video_loop: bool = False,
+        project_id: str = "",
+    ) -> LipsyncJobModel:
+        """创建对口型任务并提交到 MediaKit.
+
+        Raises:
+            MediaKitError: API 调用失败
+        """
+        # 1. 创建数据库记录
+        job_id = str(uuid.uuid4())
+        job = LipsyncJobModel(
+            id=job_id,
+            user_id=user_id,
+            project_id=project_id,
+            video_url=video_url,
+            audio_url=audio_url,
+            enable_video_loop=enable_video_loop,
+            status="pending",
+        )
+        self.db.add(job)
+        self.db.flush()
+
+        # 2. 提交到 MediaKit
+        try:
+            result = self.client.submit_lipsync(
+                video_url=video_url,
+                audio_url=audio_url,
+                enable_video_loop=enable_video_loop,
+                client_token=job_id,  # 幂等控制
+            )
+            job.mediakit_task_id = result["task_id"]
+            job.status = "submitted"
+            job.submitted_at = datetime.now(timezone.utc)
+        except MediaKitError as exc:
+            job.status = "failed"
+            job.error_message = str(exc)
+            job.error_code = exc.code
+            logger.error("提交对口型任务失败: %s", exc)
+            raise
+
+        self.db.commit()
+        self.db.refresh(job)
+        return job
+
+    # ── 查询任务 ──────────────────────────────────────────────────────────
+
+    def get_job(self, job_id: str, user_id: str) -> Optional[LipsyncJobModel]:
+        """获取任务详情（用户隔离）."""
+        return (
+            self.db.query(LipsyncJobModel)
+            .filter(LipsyncJobModel.id == job_id, LipsyncJobModel.user_id == user_id)
+            .first()
+        )
+
+    def list_jobs(
+        self,
+        *,
+        user_id: str,
+        project_id: str = "",
+        status: str = "",
+        offset: int = 0,
+        limit: int = 20,
+    ) -> tuple[list[LipsyncJobModel], int]:
+        """获取任务列表（分页 + 用户隔离）."""
+        query = self.db.query(LipsyncJobModel).filter(LipsyncJobModel.user_id == user_id)
+        if project_id:
+            query = query.filter(LipsyncJobModel.project_id == project_id)
+        if status:
+            query = query.filter(LipsyncJobModel.status == status)
+
+        total = query.count()
+        items = query.order_by(LipsyncJobModel.created_at.desc()).offset(offset).limit(limit).all()
+        return items, total
+
+    # ── 更新任务状态（轮询） ──────────────────────────────────────────────
+
+    def refresh_job_status(self, job_id: str, user_id: str) -> Optional[LipsyncJobModel]:
+        """从 MediaKit 拉取最新状态并更新本地记录.
+
+        Returns:
+            更新后的 Job，或 None（任务不存在/不属于该用户）
+        """
+        job = self.get_job(job_id, user_id)
+        if job is None:
+            return None
+
+        # 终态不需要再轮询
+        if job.status in (STATUS_COMPLETED, "failed"):
+            return job
+
+        # 未提交的任务不轮询
+        if not job.mediakit_task_id:
+            return job
+
+        try:
+            status_data = self.client.get_task_status(job.mediakit_task_id)
+        except MediaKitError as exc:
+            logger.error("轮询对口型任务状态失败 [%s]: %s", job_id, exc)
+            return job
+
+        mk_status = status_data.get("status", STATUS_RUNNING)
+
+        if mk_status == STATUS_COMPLETED:
+            result = status_data.get("result", {})
+            job.status = STATUS_COMPLETED
+            job.output_video_url = result.get("video_url", "")
+            job.output_duration = result.get("duration", 0.0)
+            job.completed_at = datetime.now(timezone.utc)
+        elif mk_status == STATUS_FAILED:
+            error = status_data.get("error", {})
+            job.status = "failed"
+            job.error_message = error.get("message", "任务执行失败")
+            job.error_code = error.get("code", "TaskFailed")
+            job.completed_at = datetime.now(timezone.utc)
+        # running 状态只更新时间戳
+        job.updated_at = datetime.now(timezone.utc)
+        self.db.commit()
+        self.db.refresh(job)
+        return job
+
+    # ── 取消任务 ──────────────────────────────────────────────────────────
+
+    def cancel_job(self, job_id: str, user_id: str) -> Optional[LipsyncJobModel]:
+        """取消任务（仅 pending/submitted 状态可取消）."""
+        job = self.get_job(job_id, user_id)
+        if job is None:
+            return None
+
+        if job.status in ("pending", "submitted"):
+            job.status = "cancelled"
+            job.updated_at = datetime.now(timezone.utc)
+            self.db.commit()
+            self.db.refresh(job)
+
+        return job

apps/api/app/services/mediakit_client.py

@@ -0,0 +1,243 @@
+"""MediaKit 客户端 — 封装火山引擎 AI MediaKit 对口型 API.
+
+接口文档：https://docs.volcengine.com/docs/6448/2656064
+
+异步任务流程：
+1. POST /api/v1/tools/lip-sync  提交对口型任务 → 返回 task_id
+2. GET  /api/v1/tasks/{task_id} 轮询任务状态 → running/completed/failed
+3. completed 时 result.video_url 为口型对齐视频（临时链接 24h 有效）
+
+设计原则：
+- API Key 从配置读取（settings.mediakit_api_key）
+- 未配置 API Key 时所有方法返回降级响应，不阻塞主流程
+- HTTP 超时/网络异常统一包装为 MediaKitError
+"""
+
+from __future__ import annotations
+
+import logging
+from typing import Any, Optional
+
+import httpx
+
+from packages.config import get_api_settings
+
+logger = logging.getLogger(__name__)
+
+# ── 任务状态常量 ──────────────────────────────────────────────────────────
+STATUS_RUNNING = "running"
+STATUS_COMPLETED = "completed"
+STATUS_FAILED = "failed"
+
+
+class MediaKitError(Exception):
+    """MediaKit API 调用异常."""
+
+    def __init__(self, message: str, code: str = "", request_id: str = ""):
+        self.code = code
+        self.request_id = request_id
+        super().__init__(message)
+
+
+class MediaKitClient:
+    """火山引擎 AI MediaKit 对口型 API 客户端.
+
+    用法：
+        client = get_mediakit_client()
+        result = client.submit_lipsync(video_url="...", audio_url="...")
+        task_id = result["task_id"]
+
+        status = client.get_task_status(task_id)
+        # {"status": "completed", "result": {"video_url": "...", "duration": 60.5}}
+    """
+
+    def __init__(self) -> None:
+        settings = get_api_settings()
+        self._api_key = settings.mediakit_api_key
+        self._base_url = settings.mediakit_base_url.rstrip("/")
+        self._timeout = settings.mediakit_timeout
+
+    @property
+    def is_available(self) -> bool:
+        """是否已配置 API Key（未配置时自动降级）."""
+        return bool(self._api_key)
+
+    def _headers(self) -> dict[str, str]:
+        return {
+            "Authorization": f"Bearer {self._api_key}",
+            "Content-Type": "application/json",
+        }
+
+    # ── 提交对口型任务 ────────────────────────────────────────────────────
+
+    def submit_lipsync(
+        self,
+        *,
+        video_url: str,
+        audio_url: str,
+        enable_video_loop: bool = False,
+        callback_url: Optional[str] = None,
+        callback_args: Optional[str] = None,
+        client_token: Optional[str] = None,
+    ) -> dict[str, Any]:
+        """提交视频口型对齐任务.
+
+        Args:
+            video_url: 人物视频 URL（MP4，≤30min，单人真人）
+            audio_url: 驱动音频 URL（mp3/aac/wav/m4a/flac）
+            enable_video_loop: 音频长于视频时是否循环画面
+            callback_url: 任务完成回调 URL
+            callback_args: 回调时原样返回的自定义参数
+            client_token: 幂等控制 token
+
+        Returns:
+            {"success": True, "task_id": "...", "request_id": "..."}
+
+        Raises:
+            MediaKitError: API 调用失败
+        """
+        if not self.is_available:
+            raise MediaKitError("MediaKit API Key 未配置", code="NotConfigured")
+
+        payload: dict[str, Any] = {
+            "video_url": video_url,
+            "audio_url": audio_url,
+        }
+        if enable_video_loop:
+            payload["enable_video_loop"] = True
+        if callback_url:
+            payload["callback_url"] = callback_url
+        if callback_args:
+            payload["callback_args"] = callback_args[:512]  # API 限制 512 字节
+        if client_token:
+            payload["client_token"] = client_token[:64]  # API 限制 64 字符
+
+        try:
+            with httpx.Client(timeout=self._timeout) as client:
+                resp = client.post(
+                    f"{self._base_url}/tools/lip-sync",
+                    headers=self._headers(),
+                    json=payload,
+                )
+                resp.raise_for_status()
+                data = resp.json()
+        except httpx.TimeoutException as exc:
+            raise MediaKitError(f"MediaKit API 超时 ({self._timeout}s)", code="Timeout") from exc
+        except httpx.HTTPStatusError as exc:
+            body = exc.response.text[:500]
+            raise MediaKitError(
+                f"MediaKit API HTTP {exc.response.status_code}: {body}",
+                code="HttpError",
+            ) from exc
+        except httpx.RequestError as exc:
+            raise MediaKitError(f"MediaKit API 网络错误: {exc}", code="NetworkError") from exc
+        except Exception as exc:
+            raise MediaKitError(f"MediaKit API 未知错误: {exc}", code="UnknownError") from exc
+
+        if not data.get("success"):
+            error = data.get("error", {})
+            raise MediaKitError(
+                error.get("message", "提交任务失败"),
+                code=error.get("code", "SubmitFailed"),
+                request_id=data.get("request_id", ""),
+            )
+
+        return {
+            "success": True,
+            "task_id": data["task_id"],
+            "request_id": data.get("request_id", ""),
+        }
+
+    # ── 查询任务状态 ──────────────────────────────────────────────────────
+
+    def get_task_status(self, task_id: str) -> dict[str, Any]:
+        """查询异步任务状态和结果.
+
+        Args:
+            task_id: 提交任务时返回的任务 ID
+
+        Returns:
+            {
+                "success": True,
+                "task_id": "...",
+                "status": "running" | "completed" | "failed",
+                "result": {"video_url": "...", "duration": 60.5} | None,
+                "error": {"code": "...", "message": "..."} | None,
+                "created_at": 1777291767,
+                "finished_at": 1777291851 | None,
+                "expires_at": 1777464650 | None,
+            }
+
+        Raises:
+            MediaKitError: API 调用失败
+        """
+        if not self.is_available:
+            raise MediaKitError("MediaKit API Key 未配置", code="NotConfigured")
+
+        try:
+            with httpx.Client(timeout=self._timeout) as client:
+                resp = client.get(
+                    f"{self._base_url}/tasks/{task_id}",
+                    headers=self._headers(),
+                )
+                resp.raise_for_status()
+                data = resp.json()
+        except httpx.TimeoutException as exc:
+            raise MediaKitError(f"MediaKit API 超时 ({self._timeout}s)", code="Timeout") from exc
+        except httpx.HTTPStatusError as exc:
+            body = exc.response.text[:500]
+            raise MediaKitError(
+                f"MediaKit API HTTP {exc.response.status_code}: {body}",
+                code="HttpError",
+            ) from exc
+        except httpx.RequestError as exc:
+            raise MediaKitError(f"MediaKit API 网络错误: {exc}", code="NetworkError") from exc
+        except Exception as exc:
+            raise MediaKitError(f"MediaKit API 未知错误: {exc}", code="UnknownError") from exc
+
+        if not data.get("success"):
+            error = data.get("error", {})
+            raise MediaKitError(
+                error.get("message", "查询任务失败"),
+                code=error.get("code", "QueryFailed"),
+                request_id=data.get("request_id", ""),
+            )
+
+        result: dict[str, Any] = {
+            "success": True,
+            "task_id": data.get("task_id", task_id),
+            "status": data.get("status", STATUS_RUNNING),
+            "result": data.get("result"),
+            "created_at": data.get("created_at"),
+            "finished_at": data.get("finished_at"),
+            "expires_at": data.get("expires_at"),
+        }
+
+        # 失败时提取错误信息
+        if data.get("status") == STATUS_FAILED:
+            error_obj = data.get("error", {})
+            result["error"] = {
+                "code": error_obj.get("code", "TaskFailed"),
+                "message": error_obj.get("message", "任务执行失败"),
+            }
+
+        return result
+
+
+# ── 单例 ──────────────────────────────────────────────────────────────────
+
+_client: Optional[MediaKitClient] = None
+
+
+def get_mediakit_client() -> MediaKitClient:
+    """获取 MediaKit 客户端单例."""
+    global _client
+    if _client is None:
+        _client = MediaKitClient()
+    return _client
+
+
+def reset_mediakit_client() -> None:
+    """重置客户端（测试用）."""
+    global _client
+    _client = None

apps/api/app/services/script_service.py

@@ -0,0 +1,109 @@
+"""ScriptService — Issue #1795 口播文案库 CRUD.
+
+纯 Service 层封装，routes 直接调用。
+"""
+
+from __future__ import annotations
+
+import uuid
+from datetime import datetime, timezone
+from typing import Optional
+
+from sqlalchemy.orm import Session
+
+from packages.adapters.sqlalchemy_impl.models import ScriptModel
+
+
+class ScriptNotFoundError(Exception):
+    """文案不存在或不属于当前用户."""
+
+
+class ScriptService:
+    """口播文案 CRUD."""
+
+    def __init__(self, db: Session) -> None:
+        self.db = db
+
+    # ── list ──────────────────────────────────────────────────────────────
+
+    def list_scripts(
+        self,
+        user_id: str,
+        skip: int = 0,
+        limit: int = 50,
+        tag: Optional[str] = None,
+    ) -> tuple[list[ScriptModel], int]:
+        """返回 (items, total)."""
+        q = self.db.query(ScriptModel).filter(ScriptModel.user_id == user_id)
+        if tag:
+            # JSON 数组包含查询
+            q = q.filter(ScriptModel.tags.contains([tag]))
+        total = q.count()
+        items = q.order_by(ScriptModel.created_at.desc()).offset(skip).limit(limit).all()
+        return items, total
+
+    # ── create ────────────────────────────────────────────────────────────
+
+    def create_script(
+        self,
+        user_id: str,
+        title: str,
+        content: str = "",
+        segments: list | None = None,
+        tags: list | None = None,
+    ) -> ScriptModel:
+        script = ScriptModel(
+            id=str(uuid.uuid4()),
+            user_id=user_id,
+            title=title,
+            content=content,
+            segments=segments if segments is not None else [],
+            tags=tags if tags is not None else [],
+        )
+        self.db.add(script)
+        self.db.commit()
+        self.db.refresh(script)
+        return script
+
+    # ── get ───────────────────────────────────────────────────────────────
+
+    def get_script(self, script_id: str, user_id: str) -> ScriptModel:
+        script = self.db.query(ScriptModel).filter(ScriptModel.id == script_id, ScriptModel.user_id == user_id).first()
+        if script is None:
+            raise ScriptNotFoundError(f"Script {script_id} not found")
+        return script
+
+    # ── update ────────────────────────────────────────────────────────────
+
+    def update_script(
+        self,
+        script_id: str,
+        user_id: str,
+        title: Optional[str] = None,
+        content: Optional[str] = None,
+        segments: Optional[list] = None,
+        tags: Optional[list] = None,
+    ) -> ScriptModel:
+        script = self.get_script(script_id, user_id)
+        if title is not None:
+            script.title = title
+        if content is not None:
+            script.content = content
+        if segments is not None:
+            script.segments = segments
+        if tags is not None:
+            script.tags = tags
+        script.updated_at = datetime.now(timezone.utc)
+        self.db.commit()
+        self.db.refresh(script)
+        return script
+
+    # ── delete ────────────────────────────────────────────────────────────
+
+    def delete_script(self, script_id: str, user_id: str) -> bool:
+        script = self.db.query(ScriptModel).filter(ScriptModel.id == script_id, ScriptModel.user_id == user_id).first()
+        if script is None:
+            return False
+        self.db.delete(script)
+        self.db.commit()
+        return True

apps/api/app/services/video_compose_service.py

@@ -39,6 +39,9 @@ from packages.domain.video_filter_builder import (
 )
 from packages.domain.video_filter_builder import build_concat_filter as _build_concat_filter_func
 from packages.domain.video_filter_builder import build_filter_complex as _build_filter_complex
+from packages.domain.video_filter_builder import (
+    build_title_drawtext_filter,
+)
 from packages.domain.video_filter_builder import build_xfade_filter as _build_xfade_filter_func
 from packages.domain.video_filter_builder import chain_filters as _chain_filters_func
 from packages.domain.video_filter_builder import has_audio as _has_audio_func
@@ -248,6 +251,27 @@ class VideoComposeService:
             transitions=[c.transition_effect for c in ready_clips],
         )
 
+        # ── #1789 标题 drawtext 滤镜叠加 ──
+        # 从 plan.config 读取 title_config，生成 drawtext 滤镜链入 filter_complex
+        title_cfg = (plan.config or {}).get("title", {}) or {}
+        if not isinstance(title_cfg, dict):
+            title_cfg = {}
+        # 同时兼容 plan.config["title_config"]（API 回写路径）
+        if not title_cfg.get("text") and not title_cfg.get("content"):
+            title_cfg_alt = (plan.config or {}).get("title_config", {}) or {}
+            if isinstance(title_cfg_alt, dict) and (title_cfg_alt.get("text") or title_cfg_alt.get("content")):
+                title_cfg = title_cfg_alt
+        drawtext_filter = build_title_drawtext_filter(title_cfg, output_width, output_height)
+        if drawtext_filter:
+            # 将最终输出标签从 [outv] 改为 [composed]，再链入 drawtext → [outv]
+            filter_complex = filter_complex.replace("[outv]", "[composed]")
+            filter_complex += f";[composed]{drawtext_filter}[outv]"
+            logger.info(
+                "[#1789] 标题 drawtext 滤镜已注入: plan_id=%s text=%s",
+                plan_id,
+                (title_cfg.get("text") or title_cfg.get("content") or "")[:30],
+            )
+
         # 构建完整命令
         command: list[str] = ["ffmpeg", "-y"]
 

apps/api/app/tasks/__init__.py

@@ -0,0 +1 @@
+"""Celery 异步任务模块."""

apps/api/app/tasks/ai_avatar_render.py

@@ -0,0 +1,48 @@
+"""AI数字人渲染 Celery 异步任务 — #1798."""
+
+from __future__ import annotations
+
+import logging
+
+from app.core.celery_app import celery_app
+from app.dependencies import get_db_session
+
+logger = logging.getLogger(__name__)
+
+
+@celery_app.task(bind=True, name="ai_avatar_render.execute", max_retries=2)
+def execute_ai_avatar_render(self, job_id: str) -> dict:
+    """执行 AI 数字人渲染管线.
+
+    进度更新:
+    - 0%: 任务开始
+    - 20%: 下载对口型视频完成
+    - 40%: 滤镜链构建完成
+    - 80%: FFmpeg 渲染完成
+    - 95%: 上传 OSS 完成
+    - 100%: 任务完成
+    """
+    logger.info("开始执行渲染任务: %s", job_id)
+    self.update_state(state="PROCESSING", meta={"progress": 0, "job_id": job_id})
+
+    try:
+        # 获取数据库 session
+        db_gen = get_db_session()
+        db = next(db_gen)
+        try:
+            from app.services.ai_avatar_render_service import AiAvatarRenderService
+
+            service = AiAvatarRenderService(db)
+            service.execute_render(job_id)
+        finally:
+            try:
+                next(db_gen)
+            except StopIteration:
+                pass
+
+        return {"status": "completed", "job_id": job_id}
+
+    except Exception as exc:
+        logger.exception("渲染任务执行异常 [%s]: %s", job_id, exc)
+        self.update_state(state="FAILED", meta={"progress": 0, "error": str(exc)})
+        raise

apps/web/src/api/assets/libraries.ts

@@ -5,10 +5,22 @@ import apiClient from "../client"
 import { getOrCreateDefaultProject } from "../projects"
 import type { AssetLibraryItem } from "./types"
 
-/** 获取当前用户的所有素材库 */
-export const getAssetLibraries = async (): Promise<AssetLibraryItem[]> => {
-  const response = await apiClient.get("/asset-libraries")
-  return response.data.items || []
+/**
+ * 获取当前用户的素材库
+ *
+ * @param kind 可选，按素材库类型过滤（video/voice/image）。
+ *   后端 GET /asset-libraries 支持 kind 查询参数；这里同时在前端再按返回数据的
+ *   kind 字段兜底过滤一次，保证旧后端（忽略未知 query 参数）也不会把其他类型的库
+ *   混进来（#1777：视频选择器只展示视频库）。
+ */
+export const getAssetLibraries = async (
+  kind?: AssetLibraryItem["kind"],
+): Promise<AssetLibraryItem[]> => {
+  const response = await apiClient.get<{ items?: AssetLibraryItem[] }>("/asset-libraries", {
+    params: kind ? { kind } : undefined,
+  })
+  const items = response.data.items || []
+  return kind ? items.filter((lib) => lib.kind === kind) : items
 }
 
 /** 创建素材库（自动获取或创建默认项目以提供 project_id） */

apps/web/src/api/client.ts

@@ -55,6 +55,19 @@ apiClient.interceptors.response.use(
   async (error: AxiosError<{ detail?: string; message?: string; msg?: string }>) => {
     const originalRequest = error.config as InternalAxiosRequestConfig & {
       _retry?: boolean
+      /**
+       * 调用方自行处理错误提示时置 true：拦截器跳过全局 message 弹窗（#1777）。
+       * 例如失效模板自动回退时，调用方会弹「原模板已失效，已自动切换」，
+       * 不再叠加后端原始错误文案。错误仍会 reject，不影响 catch 逻辑。
+       */
+      _silentErrorToast?: boolean
+    }
+
+    // 调用方声明自行处理提示：标记为已展示，跳过下面所有全局 message 弹窗
+    if (originalRequest?._silentErrorToast) {
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      ;(error as any).__msgShown = true
+      return Promise.reject(error)
     }
 
     // 401 → 尝试刷新 Token

apps/web/src/api/editing-planner/templates.ts

@@ -12,17 +12,25 @@ import type {
   ListCategoriesResponse,
 } from "./types"
 
-/** 获取模板列表 */
+/** 获取模板列表
+ *
+ * valid_only=true 时请求后端仅返回已配置片段的模板（剪辑页选模板使用，
+ * 避免选中无片段配置的模板导致 from-assets 400，#1769/#1772）；
+ * 后端尚未支持该参数时会忽略未知 query 字段，前端再按 segments/is_active 兜底过滤。
+ * 模板编辑器/我的模板不传，可查看全部模板（含未配置片段的草稿）。
+ */
 export const getEditingTemplates = async (params?: {
   category?: string
   tag?: string
   skip?: number
   limit?: number
+  validOnly?: boolean
 }): Promise<EditingTemplate[]> => {
   const response = await apiClient.get<ListTemplatesResponse>("/templates", {
     params: {
       skip: params?.skip ?? 0,
       limit: params?.limit ?? 50,
+      ...(params?.validOnly ? { valid_only: true } : {}),
     },
   })
   let list = response.data.items

apps/web/src/api/editing-planner/types.ts

@@ -44,8 +44,10 @@ export interface BgmConfig {
 export interface TemplateSegment {
   id?: string
   segment_order: number
-  duration_min: number
-  duration_max: number
+  /** @deprecated 模板无时长概念（#1750 基线）：字段保留仅为兼容旧数据读取，新模板可不传 */
+  duration_min?: number
+  /** @deprecated 同上 */
+  duration_max?: number
   material_type: string | null
 }
 
@@ -59,7 +61,8 @@ export interface EditingTemplate {
   title_config: TitleConfig
   subtitle_config: SubtitleConfig
   bgm_config: BgmConfig
-  estimated_duration: number
+  /** @deprecated 模板无时长概念（#1750 基线）：成片时长由配音时长决定；字段保留兼容旧数据 */
+  estimated_duration?: number
   segments: TemplateSegment[]
   watermark_config?: WatermarkConfig
   intro_outro_config?: IntroOutroConfig
@@ -89,7 +92,8 @@ export interface SaveTemplatePayload {
   title_config: TitleConfig
   subtitle_config: SubtitleConfig
   bgm_config: BgmConfig
-  estimated_duration: number
+  /** @deprecated 模板无时长概念（#1750 基线）：保留兼容旧数据 */
+  estimated_duration?: number
   segments: Omit<TemplateSegment, "id">[]
   watermark_config?: WatermarkConfig
   intro_outro_config?: IntroOutroConfig

apps/web/src/api/generation/variantPlans.ts

@@ -0,0 +1,61 @@
+/**
+ * 批量变体剪辑计划 API（#1744）
+ *
+ * 批量预览时向后端申请 N 个变体的「独立剪辑计划片段」：
+ * - 变体 0 保留源 plan（用户在编辑器/智能选片产出的片段，含标题样式编辑结果）；
+ * - 变体 1..N-1 由后端 reselect_plan_for_variant 完整重跑单视频选片流程
+ *   （素材洗牌 + main 片段顺序洗牌 + 镜头/起点随机 + 跨变体 20% 区间避让 +
+ *   素材使用区间写回 metadata），与正式批量生成 POST /generation/tasks?count=N
+ *   使用同一套选片逻辑；
+ * - 正式生成时把 variant_plan_ids 原样回传，后端直接关联这些 plan 渲染，
+ *   不再重新选片 —— 预览所见即成片。
+ *
+ * 该接口只做选片/建 plan（秒级），不触发视频渲染，无渲染成本。
+ * 后端端点未上线（404）或选片失败（素材不足等）时前端降级为本地 variantSeed
+ * 模拟预览，不阻塞用户流程。
+ */
+import apiClient from "../client"
+import type { EditPlanClip } from "../template-editor"
+
+/** 批量变体计划请求体 */
+export interface BatchVariantPlansRequest {
+  template_id: string
+  /** 本批次素材池（手动选择或智能匹配结果） */
+  asset_ids: string[]
+  /** 变体数量（≥1）；=1 时只返回源 plan 片段 */
+  count: number
+  /** 源剪辑计划 ID：优先取预览/草稿关联的 plan；不传由后端按 template_id+user 兜底最新 plan */
+  source_edit_plan_id?: string
+}
+
+/** 单个变体的计划片段 */
+export interface VariantPlan {
+  /** 变体序号，从 0 开始 */
+  variant_index: number
+  /** 该变体关联的剪辑计划 ID（正式生成时回传，实现预览即成片） */
+  plan_id: string
+  /** 该变体的真实片段（顺序/素材/起点与正式成片一致） */
+  clips: EditPlanClip[]
+}
+
+/** 批量变体计划响应 */
+export interface BatchVariantPlansResponse {
+  items: VariantPlan[]
+  total: number
+}
+
+/**
+ * 创建批量变体剪辑计划并返回各变体片段。
+ *
+ * 注意：端点 404（后端未上线）/ 400（素材不足）等失败由调用方 catch 后降级，
+ * 不要抛 unhandled rejection。
+ */
+export async function createBatchVariantPlans(
+  params: BatchVariantPlansRequest,
+): Promise<BatchVariantPlansResponse> {
+  const response = await apiClient.post<BatchVariantPlansResponse>(
+    "/generation/variant-plans",
+    params,
+  )
+  return response.data
+}

apps/web/src/api/tasks/types.ts

@@ -100,6 +100,12 @@ export interface CreateGenerationTaskRequest {
   voice_library_ids?: string[]
   /** 各变体独立封面URL：长度1=共用，长度=count=独立，空数组=回退 cover_url */
   cover_urls?: string[]
+  /**
+   * 批量变体剪辑计划 ID（#1744）：预览阶段后端独立选片产出的 plan id 列表
+   * （按变体全量索引，长度=previewCount）。正式生成回传后后端直接关联这些
+   * plan 渲染、不再重新选片，保证预览所见即成片。后端未支持时忽略该字段。
+   */
+  variant_plan_ids?: string[]
 }
 
 /** 单个生成任务详情（对齐后端 GenerationTaskResponse） */

apps/web/src/api/template-editor/clips.ts

@@ -91,7 +91,7 @@ export async function createClipsFromAssets(
   assetIds: string[],
   clipType = "main",
   requiredClipsCount?: number,
-  opts?: { signal?: AbortSignal },
+  opts?: { signal?: AbortSignal; silentErrorToast?: boolean },
 ): Promise<ClipsFromAssetsResponse> {
   const body: Record<string, unknown> = {
     asset_ids: assetIds,
@@ -104,7 +104,12 @@ export async function createClipsFromAssets(
   const response = await apiClient.post<ClipsFromAssetsResponse>(
     `/templates/${templateId}/editor/clips/from-assets`,
     body,
-    { timeout: 60000, signal: opts?.signal },
+    {
+      timeout: 60000,
+      signal: opts?.signal,
+      // _silentErrorToast 由 api/client.ts 响应拦截器读取（抑制全局错误 toast，#1777）
+      ...(opts?.silentErrorToast ? ({ _silentErrorToast: true } as Record<string, unknown>) : {}),
+    },
   )
   return response.data
 }

apps/web/src/api/template-editor/editPlans.ts

@@ -43,11 +43,17 @@ export async function updateEditPlanClips(
   templateId: string,
   clips: EditPlanClipInput[],
   signal?: AbortSignal,
+  /** 为 true 时抑制全局错误 toast（调用方自行提示，如失效模板回退 #1777） */
+  silentErrorToast?: boolean,
 ): Promise<{ count: number }> {
   const response = await apiClient.put(
     `/templates/${templateId}/editor/clips`,
     { clips },
-    { signal },
+    {
+      signal,
+      // _silentErrorToast 由 api/client.ts 响应拦截器读取（抑制全局错误 toast）
+      ...(silentErrorToast ? ({ _silentErrorToast: true } as Record<string, unknown>) : {}),
+    },
   )
   return response.data
 }

apps/web/src/api/templates/types.ts

@@ -42,8 +42,10 @@ export interface TemplateItem {
 export interface TemplateSegment {
   id?: string
   segment_order: number
-  duration_min: number
-  duration_max: number
+  /** @deprecated 模板无时长概念（#1750 基线）：字段保留仅为兼容旧数据读取 */
+  duration_min?: number
+  /** @deprecated 同上 */
+  duration_max?: number
   material_type: string | null
   description?: string
 }
@@ -55,8 +57,6 @@ export interface TemplateListParams {
   category?: string
   tags?: string
   keyword?: string
-  /** 时长筛选（秒）：short < 30, medium 30-120, long > 120 */
-  duration_range?: "short" | "medium" | "long"
 }
 
 /** 模板列表分页响应 */

apps/web/src/config/navigation.ts

@@ -18,6 +18,7 @@ import {
   ControlOutlined,
   CrownOutlined,
   UnorderedListOutlined,
+  UserOutlined,
 } from "@ant-design/icons"
 
 /** 导航项类型 */
@@ -88,6 +89,12 @@ export const NAV_ITEMS: NavItem[] = [
     path: "/app/generate",
     icon: React.createElement(VideoCameraOutlined),
   },
+  {
+    key: "ai-avatar",
+    label: "AI数字人",
+    path: "/app/ai-avatar",
+    icon: React.createElement(UserOutlined),
+  },
   {
     key: "history",
     label: "任务历史",
@@ -131,6 +138,12 @@ export const NAV_GROUPS: NavGroup[] = [
         path: "/app/generate",
         icon: React.createElement(VideoCameraOutlined),
       },
+      {
+        key: "ai-avatar",
+        label: "AI数字人",
+        path: "/app/ai-avatar",
+        icon: React.createElement(UserOutlined),
+      },
       {
         key: "editing-planner",
         label: "剪辑模板",

apps/web/src/pages/ai-avatar/AiAvatarPage.tsx

@@ -0,0 +1,327 @@
+/**
+ * AI数字人 — 主页面（v3）
+ * 5列水平面板布局
+ */
+import React, { useState, useCallback, useEffect, useRef } from "react"
+import "./AiAvatar.css"
+import { useAiAvatar } from "./hooks/useAiAvatar"
+import { PanelVideoSelector } from "./components/PanelVideoSelector"
+import PanelVoiceSelector from "./components/PanelVoiceSelector"
+import PanelScriptAndLipsync from "./components/PanelScriptAndLipsync"
+import PanelTitleConfig from "./components/PanelTitleConfig"
+import PanelCoverAndGenerate from "./components/PanelCoverAndGenerate"
+import { ModalAssetPicker } from "./components/ModalAssetPicker"
+import ModalBRollEditor from "./components/ModalBRollEditor"
+import { getScripts, createLipsyncJob, getLipsyncJob, submitRender } from "./api/aiAvatar"
+import { getAssetsByKind } from "@/api/assets"
+
+/** 面板折叠状态 */
+type PanelKey = "video" | "voice" | "script" | "title" | "cover"
+
+const AiAvatarPage: React.FC = () => {
+  const state = useAiAvatar()
+  const [collapsed, setCollapsed] = useState<Record<PanelKey, boolean>>({
+    video: false,
+    voice: false,
+    script: false,
+    title: false,
+    cover: false,
+  })
+
+  /* ── 素材库弹窗 ── */
+  const [bRollAssets, setBRollAssets] = useState<import("@/api/assets").AssetItem[]>([])
+
+  /* ── 对口型轮询 ── */
+  const lipsyncTimerRef = useRef<ReturnType<typeof setInterval> | null>(null)
+
+  const togglePanel = useCallback((key: PanelKey) => {
+    setCollapsed((prev) => ({ ...prev, [key]: !prev[key] }))
+  }, [])
+
+  /* ── 对口型 ── */
+  const handleGenerateLipsync = useCallback(async () => {
+    if (!state.selectedVideo || !state.selectedVoice || !state.scriptText) return
+    try {
+      const job = await createLipsyncJob({
+        voice_id: state.selectedVoice.voice_id,
+        script_text: state.scriptText,
+        video_asset_id: state.selectedVideo.id,
+      })
+      state.setLipsyncJob(job)
+      // 开始轮询
+      if (lipsyncTimerRef.current) clearInterval(lipsyncTimerRef.current)
+      lipsyncTimerRef.current = setInterval(async () => {
+        try {
+          const updated = await getLipsyncJob(job.id)
+          state.setLipsyncJob(updated)
+          if (updated.status === "completed" || updated.status === "failed") {
+            if (lipsyncTimerRef.current) clearInterval(lipsyncTimerRef.current)
+          }
+        } catch {
+          // 忽略轮询错误
+        }
+      }, 3000)
+    } catch (err) {
+      console.error("对口型任务创建失败:", err)
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [state.selectedVideo, state.selectedVoice, state.scriptText])
+
+  // 清理轮询
+  useEffect(() => {
+    return () => {
+      if (lipsyncTimerRef.current) clearInterval(lipsyncTimerRef.current)
+    }
+  }, [])
+
+  /* ── 加载 B-roll 素材 ── */
+  useEffect(() => {
+    getAssetsByKind("video", { limit: 50 })
+      .then(setBRollAssets)
+      .catch(() => {})
+  }, [])
+
+  /* ── 生成视频 ── */
+  const handleGenerate = useCallback(async () => {
+    if (!state.lipsyncJob || state.lipsyncJob.status !== "completed") return
+    state.setIsGenerating(true)
+    try {
+      await submitRender({
+        lipsync_job_id: state.lipsyncJob.id,
+        script_id: state.script?.id,
+        b_roll_segments: state.bRollSegments as never,
+        title_config: state.titleConfig as unknown as Record<string, unknown>,
+        cover_config: state.coverConfig as unknown as Record<string, unknown>,
+        resolution: state.resolution,
+      })
+    } catch (err) {
+      console.error("渲染任务提交失败:", err)
+    } finally {
+      state.setIsGenerating(false)
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [
+    state.lipsyncJob,
+    state.script,
+    state.bRollSegments,
+    state.titleConfig,
+    state.coverConfig,
+    state.resolution,
+  ])
+
+  /* ── 配置汇总 ── */
+  const summary = {
+    videoName: state.selectedVideo?.name || null,
+    voiceName: state.selectedVoice?.name || null,
+    scriptLength: state.scriptText.length,
+    lipsyncStatus: state.lipsyncJob?.status || null,
+    brollCount: state.bRollSegments.length,
+    hasTitle: state.titleConfig.title.length > 0,
+    hasCover: state.coverConfig.enabled,
+  }
+
+  return (
+    <div className="aa-page">
+      <div className="aa-page-header">
+        <h1>AI数字人</h1>
+      </div>
+      <div className="aa-page-body">
+        {/* 面板1：出镜视频 */}
+        <div className={`aa-panel aa-panel--p1${collapsed.video ? " collapsed" : ""}`}>
+          <div className="aa-panel__header" onClick={() => togglePanel("video")}>
+            <span className="aa-panel__title">出镜视频</span>
+            <span className="aa-panel__toggle">▼</span>
+          </div>
+          <div className="aa-panel__body">
+            <PanelVideoSelector
+              selectedVideo={state.selectedVideo}
+              onSelectVideo={() => state.setShowAssetPicker(true)}
+              onRemoveVideo={state.removeVideo}
+            />
+          </div>
+        </div>
+
+        {/* 面板2：配音库 */}
+        <div className={`aa-panel aa-panel--p2${collapsed.voice ? " collapsed" : ""}`}>
+          <div className="aa-panel__header" onClick={() => togglePanel("voice")}>
+            <span className="aa-panel__title">配音库</span>
+            <span className="aa-panel__toggle">▼</span>
+          </div>
+          <div className="aa-panel__body">
+            <PanelVoiceSelector
+              voiceSource={state.voiceSource}
+              onVoiceSourceChange={state.setVoiceSource}
+              selectedVoice={state.selectedVoice}
+              onSelectVoice={state.setSelectedVoice}
+              emotion={state.emotion}
+              onEmotionChange={state.setEmotion}
+              speed={state.speed}
+              onSpeedChange={state.setSpeed}
+              language={state.language}
+              onLanguageChange={state.setLanguage}
+            />
+          </div>
+        </div>
+
+        {/* 面板3：文案 & 对口型 */}
+        <div className={`aa-panel aa-panel--p3${collapsed.script ? " collapsed" : ""}`}>
+          <div className="aa-panel__header" onClick={() => togglePanel("script")}>
+            <span className="aa-panel__title">文案 & 对口型</span>
+            <span className="aa-panel__toggle">▼</span>
+          </div>
+          <div className="aa-panel__body">
+            <PanelScriptAndLipsync
+              scriptText={state.scriptText}
+              onScriptTextChange={state.setScriptText}
+              onOpenScriptModal={() => state.setShowScriptModal(true)}
+              lipsyncJob={state.lipsyncJob}
+              onGenerateLipsync={handleGenerateLipsync}
+              bRollSegments={state.bRollSegments}
+              onOpenBRollModal={() => state.setShowBRollModal(true)}
+              onRemoveBRoll={state.removeBRollSegment}
+            />
+          </div>
+        </div>
+
+        {/* 面板4：标题配置 */}
+        <div className={`aa-panel aa-panel--p4${collapsed.title ? " collapsed" : ""}`}>
+          <div className="aa-panel__header" onClick={() => togglePanel("title")}>
+            <span className="aa-panel__title">标题配置</span>
+            <span className="aa-panel__toggle">▼</span>
+          </div>
+          <div className="aa-panel__body">
+            <PanelTitleConfig titleConfig={state.titleConfig} onUpdate={state.updateTitleConfig} />
+          </div>
+        </div>
+
+        {/* 面板5：封面 & 生成 */}
+        <div className={`aa-panel aa-panel--p5${collapsed.cover ? " collapsed" : ""}`}>
+          <div className="aa-panel__header" onClick={() => togglePanel("cover")}>
+            <span className="aa-panel__title">封面 & 生成</span>
+            <span className="aa-panel__toggle">▼</span>
+          </div>
+          <div className="aa-panel__body">
+            <PanelCoverAndGenerate
+              coverConfig={state.coverConfig}
+              onCoverConfigChange={(partial) =>
+                state.setCoverConfig((prev) => ({ ...prev, ...partial }))
+              }
+              resolution={state.resolution}
+              onResolutionChange={state.setResolution}
+              isGenerating={state.isGenerating}
+              onGenerate={handleGenerate}
+              summary={summary}
+            />
+          </div>
+        </div>
+      </div>
+
+      {/* 素材库弹窗 */}
+      {state.showAssetPicker && (
+        <ModalAssetPicker
+          open={state.showAssetPicker}
+          onClose={() => state.setShowAssetPicker(false)}
+          onSelect={state.selectVideo}
+          selectedId={state.selectedVideo?.id}
+        />
+      )}
+
+      {/* 文案选择弹窗 */}
+      {state.showScriptModal && (
+        <ScriptSelectModalLazy
+          open={state.showScriptModal}
+          onClose={() => state.setShowScriptModal(false)}
+          onSelect={state.selectScript}
+        />
+      )}
+
+      {/* B-roll 编辑器弹窗 */}
+      {state.showBRollModal && (
+        <ModalBRollEditor
+          open={state.showBRollModal}
+          onClose={() => state.setShowBRollModal(false)}
+          existingSegments={state.bRollSegments}
+          availableAssets={bRollAssets}
+          onConfirm={state.addBRollSegment}
+          onRemove={state.removeBRollSegment}
+        />
+      )}
+    </div>
+  )
+}
+
+/** 文案选择弹窗（内联实现，轻量版） */
+const ScriptSelectModalLazy: React.FC<{
+  open: boolean
+  onClose: () => void
+  onSelect: (script: import("./types").Script) => void
+}> = ({ open, onClose, onSelect }) => {
+  const [scripts, setScripts] = useState<import("./types").Script[]>([])
+  const [search, setSearch] = useState("")
+  const [loading, setLoading] = useState(false)
+
+  useEffect(() => {
+    if (!open) return
+    setLoading(true)
+    getScripts()
+      .then(setScripts)
+      .catch(() => {})
+      .finally(() => setLoading(false))
+  }, [open])
+
+  const filtered = scripts.filter(
+    (s) => !search || s.title.includes(search) || s.content.includes(search),
+  )
+
+  return (
+    <div className="aa-modal-overlay" onClick={onClose}>
+      <div className="aa-modal" onClick={(e) => e.stopPropagation()}>
+        <div className="aa-modal__header">
+          <span className="aa-modal__title">选择文案</span>
+          <button className="aa-modal__close" onClick={onClose}>
+            ✕
+          </button>
+        </div>
+        <div className="aa-modal__body">
+          <div className="aa-script-list-header">
+            <input
+              className="aa-input"
+              placeholder="搜索文案..."
+              value={search}
+              onChange={(e) => setSearch(e.target.value)}
+            />
+          </div>
+          {loading ? (
+            <div className="aa-empty">加载中...</div>
+          ) : filtered.length === 0 ? (
+            <div className="aa-empty">
+              <div className="aa-empty__icon">📝</div>
+              暂无文案，请手动输入或新建
+            </div>
+          ) : (
+            <div className="aa-script-list">
+              {filtered.map((s) => (
+                <div key={s.id} className="aa-script-item" onClick={() => onSelect(s)}>
+                  <span className="aa-script-item__icon">📄</span>
+                  <div className="aa-script-item__info">
+                    <div className="aa-script-item__title">{s.title}</div>
+                    <div className="aa-script-item__meta">
+                      {s.char_count}字 · {new Date(s.created_at).toLocaleDateString()}
+                    </div>
+                  </div>
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
+        <div className="aa-modal__footer">
+          <button className="aa-btn" onClick={onClose}>
+            取消
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default AiAvatarPage

apps/web/src/pages/ai-avatar/api/aiAvatar.ts

@@ -0,0 +1,63 @@
+/**
+ * AI数字人 — API 封装
+ */
+import apiClient from "@/api/client"
+import type { Script, LipsyncJob, RenderJob, BRollSegment } from "../types"
+
+/* ── 文案库 ── */
+export const getScripts = async (): Promise<Script[]> => {
+  const response = await apiClient.get<Script[]>("/scripts")
+  return response.data
+}
+
+export const getScriptById = async (id: string): Promise<Script> => {
+  const response = await apiClient.get<Script>(`/scripts/${id}`)
+  return response.data
+}
+
+export const createScript = async (data: { title: string; content: string }): Promise<Script> => {
+  const response = await apiClient.post<Script>("/scripts", data)
+  return response.data
+}
+
+export const deleteScript = async (id: string): Promise<void> => {
+  await apiClient.delete(`/scripts/${id}`)
+}
+
+/* ── 对口型 ── */
+export const createLipsyncJob = async (data: {
+  voice_id: string
+  script_text: string
+  video_asset_id: string
+}): Promise<LipsyncJob> => {
+  const response = await apiClient.post<LipsyncJob>("/lipsync/jobs", data)
+  return response.data
+}
+
+export const getLipsyncJob = async (id: string): Promise<LipsyncJob> => {
+  const response = await apiClient.get<LipsyncJob>(`/lipsync/jobs/${id}`)
+  return response.data
+}
+
+/* ── 渲染 ── */
+export const submitRender = async (data: {
+  lipsync_job_id: string
+  script_id?: string
+  b_roll_segments?: BRollSegment[]
+  title_config?: Record<string, unknown>
+  cover_config?: Record<string, unknown>
+  project_id?: string
+  resolution?: string
+}): Promise<RenderJob> => {
+  const response = await apiClient.post<RenderJob>("/ai-avatar/render", data)
+  return response.data
+}
+
+export const getRenderJob = async (jobId: string): Promise<RenderJob> => {
+  const response = await apiClient.get<RenderJob>(`/ai-avatar/render/${jobId}`)
+  return response.data
+}
+
+export const cancelRenderJob = async (jobId: string): Promise<void> => {
+  await apiClient.post(`/ai-avatar/render/${jobId}/cancel`)
+}

apps/web/src/pages/ai-avatar/components/ModalAssetPicker.tsx

@@ -0,0 +1,211 @@
+/**
+ * AI数字人 — 素材库弹窗
+ * 搜索框 + 类型筛选（全部/视频/图片）+ 4 列竖屏 9:16 缩略图网格 + 底部确认选择
+ */
+import { useEffect, useState } from "react"
+import { ensureDefaultLibrary, getAssetsByKind, type AssetItem } from "@/api/assets"
+import { getOrCreateDefaultProject } from "@/api/projects"
+
+/** 素材类型筛选 */
+type AssetKindFilter = "all" | "video" | "image"
+
+export interface ModalAssetPickerProps {
+  open: boolean
+  onClose: () => void
+  onSelect: (asset: AssetItem) => void
+  /** 已选中的素材 ID（用于高亮） */
+  selectedId?: string
+}
+
+const KIND_OPTIONS: { value: AssetKindFilter; label: string }[] = [
+  { value: "all", label: "全部" },
+  { value: "video", label: "视频" },
+  { value: "image", label: "图片" },
+]
+
+export function ModalAssetPicker({ open, onClose, onSelect, selectedId }: ModalAssetPickerProps) {
+  const [keyword, setKeyword] = useState("")
+  const [kindFilter, setKindFilter] = useState<AssetKindFilter>("video")
+  const [assets, setAssets] = useState<AssetItem[]>([])
+  const [pickedId, setPickedId] = useState<string | null>(null)
+  const [loading, setLoading] = useState(false)
+  const [error, setError] = useState("")
+  const [ready, setReady] = useState(false)
+
+  /* 弹窗打开：重置筛选 / 关键字，并定位高亮到已选素材 */
+  useEffect(() => {
+    if (!open) return
+    setKeyword("")
+    setKindFilter("video")
+    setAssets([])
+    setError("")
+    setPickedId(selectedId ?? null)
+    setReady(false)
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open])
+
+  /* 确保默认素材库存在（视频 + 图片，供类型筛选），仅在弹窗打开时执行一次 */
+  useEffect(() => {
+    if (!open) return
+    let cancelled = false
+    const ensureLibraries = async () => {
+      try {
+        const project = await getOrCreateDefaultProject()
+        await Promise.all([
+          ensureDefaultLibrary({ project_id: project.id, kind: "video" }),
+          ensureDefaultLibrary({ project_id: project.id, kind: "image" }),
+        ])
+        if (!cancelled) setReady(true)
+      } catch {
+        if (!cancelled) setError("素材库初始化失败，请重试")
+      }
+    }
+    ensureLibraries()
+    return () => {
+      cancelled = true
+    }
+  }, [open])
+
+  /* 拉取素材：类型 / 关键字变化时防抖重新请求 */
+  useEffect(() => {
+    if (!open || !ready) return
+    let cancelled = false
+    setLoading(true)
+    const load = async () => {
+      try {
+        const kw = keyword.trim() || undefined
+        let items: AssetItem[] = []
+        if (kindFilter === "all") {
+          const [videos, images] = await Promise.all([
+            getAssetsByKind("video", { keyword: kw }),
+            getAssetsByKind("image", { keyword: kw }),
+          ])
+          const seen = new Set<string>()
+          items = [...videos, ...images].filter((a) => {
+            if (seen.has(a.id)) return false
+            seen.add(a.id)
+            return true
+          })
+        } else {
+          items = await getAssetsByKind(kindFilter, { keyword: kw })
+        }
+        if (!cancelled) setAssets(items)
+      } catch {
+        if (!cancelled) {
+          setError("素材加载失败，请重试")
+          setAssets([])
+        }
+      } finally {
+        if (!cancelled) setLoading(false)
+      }
+    }
+    const timer = window.setTimeout(load, 300)
+    return () => {
+      cancelled = true
+      window.clearTimeout(timer)
+    }
+  }, [open, ready, kindFilter, keyword])
+
+  if (!open) return null
+
+  const handleConfirm = () => {
+    if (!pickedId) return
+    const asset = assets.find((a) => a.id === pickedId)
+    if (asset) onSelect(asset)
+    onClose()
+  }
+
+  return (
+    <div className="aa-modal-overlay" onClick={onClose}>
+      <div className="aa-modal" onClick={(e) => e.stopPropagation()}>
+        {/* 头部 */}
+        <div className="aa-modal__header">
+          <span className="aa-modal__title">选择素材</span>
+          <button type="button" className="aa-modal__close" onClick={onClose} aria-label="关闭">
+            ×
+          </button>
+        </div>
+
+        {/* 主体：搜索 + 筛选 + 网格 */}
+        <div className="aa-modal__body">
+          <div className="aa-asset-search">
+            <input
+              className="aa-input"
+              type="text"
+              placeholder="搜索素材名称…"
+              value={keyword}
+              onChange={(e) => setKeyword(e.target.value)}
+            />
+            <select
+              className="aa-select"
+              style={{ width: 110, flex: "0 0 auto" }}
+              value={kindFilter}
+              onChange={(e) => setKindFilter(e.target.value as AssetKindFilter)}
+            >
+              {KIND_OPTIONS.map((opt) => (
+                <option key={opt.value} value={opt.value}>
+                  {opt.label}
+                </option>
+              ))}
+            </select>
+          </div>
+
+          {loading ? (
+            <div className="aa-empty">
+              <div className="aa-empty__icon">⏳</div>
+              素材加载中…
+            </div>
+          ) : error ? (
+            <div className="aa-empty">
+              <div className="aa-empty__icon">⚠️</div>
+              {error}
+            </div>
+          ) : assets.length === 0 ? (
+            <div className="aa-empty">
+              <div className="aa-empty__icon">📁</div>
+              暂无素材
+            </div>
+          ) : (
+            <div className="aa-asset-grid">
+              {assets.map((asset) => {
+                const isActive = asset.id === pickedId
+                const thumb = asset.thumbnail_url || asset.file_url
+                const isVideo = asset.mime_type?.includes("video")
+                return (
+                  <div
+                    key={asset.id}
+                    className={`aa-asset-card${isActive ? " selected" : ""}`}
+                    onClick={() => setPickedId(asset.id)}
+                  >
+                    {isVideo && !asset.thumbnail_url ? (
+                      <video src={asset.file_url} muted preload="metadata" />
+                    ) : (
+                      <img src={thumb} alt={asset.name} />
+                    )}
+                    {isActive && <div className="aa-asset-card__check">✓</div>}
+                    <div className="aa-asset-card__name">{asset.name}</div>
+                  </div>
+                )
+              })}
+            </div>
+          )}
+        </div>
+
+        {/* 底部：取消 + 确认选择 */}
+        <div className="aa-modal__footer">
+          <button type="button" className="aa-btn aa-btn--ghost" onClick={onClose}>
+            取消
+          </button>
+          <button
+            type="button"
+            className="aa-btn aa-btn--primary"
+            onClick={handleConfirm}
+            disabled={!pickedId}
+          >
+            确认选择
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}

apps/web/src/pages/ai-avatar/components/ModalBRollEditor.tsx

@@ -0,0 +1,345 @@
+/**
+ * AI数字人 — B-roll 画面插入编辑器弹窗
+ *
+ * 布局：
+ * - 左侧：可用素材网格（已被其他 segment 使用的素材标灰 + "已选择" 遮罩，
+ *   pointer-events: none 防止重复选择同一段素材）
+ * - 右侧：插入设置（文案段落索引 / 全屏 or 画中画 / 画中画四角位置 + 大小 / 起止时间）
+ * - 底部：已配置的画面插入列表（可删除）+ 上传新素材入口
+ */
+import React, { useMemo, useState } from "react"
+import type { AssetItem } from "@/api/assets"
+import type { BRollSegment, BRollInsertMode, PipPosition } from "../types"
+
+interface ModalBRollEditorProps {
+  open: boolean
+  onClose: () => void
+  /** 当前已有的 B-roll segments（用于标灰已选素材） */
+  existingSegments: BRollSegment[]
+  /** 所有可用素材 */
+  availableAssets: AssetItem[]
+  onConfirm: (segment: BRollSegment) => void
+  onRemove: (id: string) => void
+}
+
+const PIP_POSITION_OPTIONS: { value: PipPosition; label: string }[] = [
+  { value: "top-left", label: "左上" },
+  { value: "top-right", label: "右上" },
+  { value: "bottom-left", label: "左下" },
+  { value: "bottom-right", label: "右下" },
+]
+
+const MODE_LABEL: Record<BRollInsertMode, string> = {
+  fullscreen: "全屏切换",
+  pip: "画中画",
+}
+
+const ModalBRollEditor: React.FC<ModalBRollEditorProps> = ({
+  open,
+  onClose,
+  existingSegments,
+  availableAssets,
+  onConfirm,
+  onRemove,
+}) => {
+  /* ── 右侧设置本地状态 ── */
+  const [selectedAsset, setSelectedAsset] = useState<AssetItem | null>(null)
+  const [scriptSegmentIndex, setScriptSegmentIndex] = useState(0)
+  const [mode, setMode] = useState<BRollInsertMode>("fullscreen")
+  const [pipPosition, setPipPosition] = useState<PipPosition>("top-right")
+  const [pipScale, setPipScale] = useState(0.3)
+  const [startTime, setStartTime] = useState(0)
+  const [endTime, setEndTime] = useState(3)
+
+  /** 已被现有 segments 占用的素材 id 集合（标灰、禁止重复选择） */
+  const usedAssetIds = useMemo(
+    () => new Set(existingSegments.map((seg) => seg.asset.id)),
+    [existingSegments],
+  )
+
+  if (!open) return null
+
+  /** 选择素材（已选素材因 pointer-events:none 不会触发） */
+  const handleSelectAsset = (asset: AssetItem) => {
+    if (usedAssetIds.has(asset.id)) return
+    setSelectedAsset(asset)
+    // 默认起止时间：素材时长的前 3 秒（或整段）
+    const dur = asset.duration ?? 3
+    setEndTime(Math.min(3, dur))
+  }
+
+  /** 确认添加一段 B-roll */
+  const handleConfirm = () => {
+    if (!selectedAsset) return
+    if (endTime <= startTime) return
+    const segment: BRollSegment = {
+      id: crypto.randomUUID(),
+      asset: selectedAsset,
+      script_segment_index: scriptSegmentIndex,
+      start_time: startTime,
+      end_time: endTime,
+      mode,
+      pip_position: pipPosition,
+      pip_scale: mode === "pip" ? pipScale : 0.3,
+    }
+    onConfirm(segment)
+    // 重置选择，保留设置便于连续添加
+    setSelectedAsset(null)
+  }
+
+  const canConfirm = selectedAsset !== null && endTime > startTime
+
+  return (
+    <div className="aa-modal-overlay" onClick={onClose}>
+      <div className="aa-modal" onClick={(e) => e.stopPropagation()}>
+        {/* 头部 */}
+        <div className="aa-modal__header">
+          <span className="aa-modal__title">🎞️ 画面插入（B-roll）</span>
+          <button type="button" className="aa-modal__close" onClick={onClose}>
+            ✕
+          </button>
+        </div>
+
+        {/* 主体：左素材 + 右设置 */}
+        <div className="aa-modal__body">
+          <div className="aa-broll-modal-body">
+            {/* 左侧：素材网格 */}
+            <div className="aa-broll-left">
+              <div
+                style={{
+                  display: "flex",
+                  alignItems: "center",
+                  justifyContent: "space-between",
+                  marginBottom: 10,
+                }}
+              >
+                <span style={{ fontSize: 13, fontWeight: 600, color: "#1a1a2e" }}>
+                  选择素材（{availableAssets.length}）
+                </span>
+                <button type="button" className="aa-btn aa-btn--ghost aa-btn-sm">
+                  ⬆️ 上传新素材
+                </button>
+              </div>
+              <div className="aa-broll-asset-grid">
+                {availableAssets.map((asset) => {
+                  const alreadySelected = usedAssetIds.has(asset.id)
+                  const isCurrent = selectedAsset?.id === asset.id
+                  const classNames = [
+                    "aa-broll-asset-thumb",
+                    isCurrent ? "selected" : "",
+                    alreadySelected ? "already-selected" : "",
+                  ]
+                    .filter(Boolean)
+                    .join(" ")
+                  return (
+                    <div
+                      key={asset.id}
+                      className={classNames}
+                      onClick={() => handleSelectAsset(asset)}
+                      title={asset.name}
+                    >
+                      {asset.thumbnail_url ? (
+                        <img src={asset.thumbnail_url} alt={asset.name} />
+                      ) : (
+                        <div
+                          style={{
+                            width: "100%",
+                            height: "100%",
+                            display: "flex",
+                            alignItems: "center",
+                            justifyContent: "center",
+                            fontSize: 18,
+                          }}
+                        >
+                          🎬
+                        </div>
+                      )}
+                      <span className="aa-asset-card__name">{asset.name}</span>
+                    </div>
+                  )
+                })}
+                {availableAssets.length === 0 && (
+                  <div className="aa-empty" style={{ gridColumn: "1 / -1" }}>
+                    <div className="aa-empty__icon">🎬</div>
+                    暂无可用素材，请先上传视频素材
+                  </div>
+                )}
+              </div>
+            </div>
+
+            {/* 右侧：插入设置 */}
+            <div className="aa-broll-right">
+              <div className="aa-broll-settings">
+                {/* 文案段落索引 */}
+                <div className="aa-form-field">
+                  <label className="aa-label">文案段落索引</label>
+                  <input
+                    className="aa-input"
+                    type="number"
+                    min={0}
+                    value={scriptSegmentIndex}
+                    onChange={(e) => setScriptSegmentIndex(Math.max(0, Number(e.target.value)))}
+                  />
+                </div>
+
+                {/* 插入模式 */}
+                <div className="aa-form-field">
+                  <label className="aa-label">插入模式</label>
+                  <div className="aa-broll-mode-toggle">
+                    <button
+                      type="button"
+                      className={`aa-broll-mode-btn${mode === "fullscreen" ? " active" : ""}`}
+                      onClick={() => setMode("fullscreen")}
+                    >
+                      全屏切换
+                    </button>
+                    <button
+                      type="button"
+                      className={`aa-broll-mode-btn${mode === "pip" ? " active" : ""}`}
+                      onClick={() => setMode("pip")}
+                    >
+                      画中画
+                    </button>
+                  </div>
+                </div>
+
+                {/* 画中画：四角位置 + 大小 */}
+                {mode === "pip" && (
+                  <>
+                    <div className="aa-form-field">
+                      <label className="aa-label">画中画位置</label>
+                      <div className="aa-pip-positions">
+                        {PIP_POSITION_OPTIONS.map((opt) => (
+                          <button
+                            key={opt.value}
+                            type="button"
+                            className={`aa-pip-pos-btn${
+                              pipPosition === opt.value ? " active" : ""
+                            }`}
+                            onClick={() => setPipPosition(opt.value)}
+                          >
+                            {opt.label}
+                          </button>
+                        ))}
+                      </div>
+                    </div>
+                    <div className="aa-form-field">
+                      <div
+                        className="aa-field-label-row"
+                        style={{ display: "flex", justifyContent: "space-between" }}
+                      >
+                        <label className="aa-label">画中画大小</label>
+                        <span style={{ fontSize: 12, color: "#8c8ca1" }}>
+                          {Math.round(pipScale * 100)}%
+                        </span>
+                      </div>
+                      <input
+                        type="range"
+                        min={0.1}
+                        max={0.6}
+                        step={0.05}
+                        value={pipScale}
+                        onChange={(e) => setPipScale(Number(e.target.value))}
+                        style={{ width: "100%" }}
+                      />
+                    </div>
+                  </>
+                )}
+
+                {/* 起止时间 */}
+                <div className="aa-form-field">
+                  <label className="aa-label">开始时间（秒）</label>
+                  <input
+                    className="aa-input"
+                    type="number"
+                    min={0}
+                    step={0.1}
+                    value={startTime}
+                    onChange={(e) => setStartTime(Math.max(0, Number(e.target.value)))}
+                  />
+                </div>
+                <div className="aa-form-field">
+                  <label className="aa-label">结束时间（秒）</label>
+                  <input
+                    className="aa-input"
+                    type="number"
+                    min={0}
+                    step={0.1}
+                    value={endTime}
+                    onChange={(e) => setEndTime(Math.max(0, Number(e.target.value)))}
+                  />
+                </div>
+
+                {/* 当前选中素材提示 */}
+                <div
+                  style={{
+                    fontSize: 12,
+                    color: selectedAsset ? "#059669" : "#8c8ca1",
+                    background: "#f8f8fc",
+                    borderRadius: 6,
+                    padding: "6px 8px",
+                  }}
+                >
+                  {selectedAsset ? `已选素材：${selectedAsset.name}` : "请从左侧选择一段素材"}
+                </div>
+              </div>
+            </div>
+          </div>
+
+          {/* 底部：已配置的画面插入列表 */}
+          <div className="aa-broll-list">
+            <div className="aa-broll-list__title">已配置画面插入（{existingSegments.length}）</div>
+            {existingSegments.length === 0 ? (
+              <div className="aa-empty" style={{ padding: 12 }}>
+                尚未配置画面插入
+              </div>
+            ) : (
+              existingSegments.map((seg) => (
+                <div key={seg.id} className="aa-broll-item">
+                  {seg.asset.thumbnail_url ? (
+                    <img className="aa-broll-item__thumb" src={seg.asset.thumbnail_url} alt="" />
+                  ) : (
+                    <div className="aa-broll-item__thumb" />
+                  )}
+                  <div className="aa-broll-item__info">
+                    <div style={{ fontWeight: 500, color: "#1a1a2e" }}>{seg.asset.name}</div>
+                    <div style={{ color: "#8c8ca1", fontSize: 11 }}>
+                      段落 {seg.script_segment_index} · {MODE_LABEL[seg.mode]}
+                      {seg.mode === "pip" ? ` · ${seg.pip_position}` : ""} ·{" "}
+                      {seg.start_time.toFixed(1)}s - {seg.end_time.toFixed(1)}s
+                    </div>
+                  </div>
+                  <button
+                    type="button"
+                    className="aa-broll-item__remove"
+                    title="删除"
+                    onClick={() => onRemove(seg.id)}
+                  >
+                    🗑
+                  </button>
+                </div>
+              ))
+            )}
+          </div>
+        </div>
+
+        {/* 底部按钮 */}
+        <div className="aa-modal__footer">
+          <button type="button" className="aa-btn" onClick={onClose}>
+            关闭
+          </button>
+          <button
+            type="button"
+            className="aa-btn aa-btn--primary"
+            disabled={!canConfirm}
+            onClick={handleConfirm}
+          >
+            ✅ 添加画面插入
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default ModalBRollEditor

apps/web/src/pages/ai-avatar/components/PanelCoverAndGenerate.tsx

@@ -0,0 +1,210 @@
+/**
+ * AI数字人 — 面板5：封面 & 生成
+ * - 竖屏 9:16 封面预览（从视频截取 / 自定义上传）
+ * - 分辨率选择（720p / 1080p / 4K）
+ * - 配置汇总卡片（出镜视频/音色/文案/对口型/B-roll/标题/封面）
+ * - 渐变紫色生成按钮
+ *
+ * 注意：v3 已删除"画面插入模式"，本面板不包含该选项。
+ */
+import React, { useRef } from "react"
+import type { AiAvatarCoverConfig } from "../types"
+
+interface PanelCoverAndGenerateProps {
+  coverConfig: AiAvatarCoverConfig
+  onCoverConfigChange: (partial: Partial<AiAvatarCoverConfig>) => void
+  resolution: string
+  onResolutionChange: (r: string) => void
+  isGenerating: boolean
+  onGenerate: () => void
+  /** 配置汇总信息 */
+  summary: {
+    videoName: string | null
+    voiceName: string | null
+    scriptLength: number
+    lipsyncStatus: string | null
+    brollCount: number
+    hasTitle: boolean
+    hasCover: boolean
+  }
+}
+
+const RESOLUTION_OPTIONS = [
+  { value: "720p", label: "720p（高清）" },
+  { value: "1080p", label: "1080p（全高清）" },
+  { value: "4k", label: "4K（超清）" },
+]
+
+const LIPSYNC_STATUS_LABEL: Record<string, { text: string; cls: string }> = {
+  idle: { text: "未开始", cls: "aa-status-badge--idle" },
+  pending: { text: "排队中", cls: "aa-status-badge--pending" },
+  processing: { text: "生成中", cls: "aa-status-badge--processing" },
+  completed: { text: "已完成", cls: "aa-status-badge--completed" },
+  failed: { text: "失败", cls: "aa-status-badge--failed" },
+}
+
+const PanelCoverAndGenerate: React.FC<PanelCoverAndGenerateProps> = ({
+  coverConfig,
+  onCoverConfigChange,
+  resolution,
+  onResolutionChange,
+  isGenerating,
+  onGenerate,
+  summary,
+}) => {
+  const uploadInputRef = useRef<HTMLInputElement>(null)
+
+  /** 自定义上传封面 */
+  const handleUploadClick = () => {
+    uploadInputRef.current?.click()
+  }
+
+  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (!file) return
+    // 本地预览：生成 object URL（实际上传由父级/后端链路处理）
+    const url = URL.createObjectURL(file)
+    onCoverConfigChange({ mode: "upload", upload_url: url, thumbnail_url: url })
+    // 允许重复选择同一文件
+    e.target.value = ""
+  }
+
+  /** 从视频截取（使用配置的帧时间，默认首帧） */
+  const handleCaptureFromVideo = () => {
+    onCoverConfigChange({ mode: "auto_frame" })
+  }
+
+  const lipsync = summary.lipsyncStatus ? LIPSYNC_STATUS_LABEL[summary.lipsyncStatus] : null
+
+  const canGenerate = summary.lipsyncStatus === "completed" && !isGenerating
+
+  return (
+    <div className="aa-cover-generate">
+      {/* 封面预览（竖屏 9:16） */}
+      <div className="aa-cover-preview">
+        {coverConfig.thumbnail_url ? (
+          <img src={coverConfig.thumbnail_url} alt="封面预览" />
+        ) : (
+          <span className="aa-cover-preview__placeholder">暂无封面</span>
+        )}
+      </div>
+
+      <div className="aa-cover-actions">
+        <button
+          type="button"
+          className={`aa-btn aa-btn--ghost${coverConfig.mode === "auto_frame" ? " active" : ""}`}
+          onClick={handleCaptureFromVideo}
+        >
+          🎬 从视频截取
+        </button>
+        <button
+          type="button"
+          className={`aa-btn aa-btn--ghost${coverConfig.mode === "upload" ? " active" : ""}`}
+          onClick={handleUploadClick}
+        >
+          📷 自定义上传
+        </button>
+        <input
+          ref={uploadInputRef}
+          type="file"
+          accept="image/*"
+          style={{ display: "none" }}
+          onChange={handleFileChange}
+        />
+      </div>
+
+      {/* 分辨率选择 */}
+      <div className="aa-form-field">
+        <label className="aa-label">分辨率</label>
+        <select
+          className="aa-select"
+          value={resolution}
+          onChange={(e) => onResolutionChange(e.target.value)}
+        >
+          {RESOLUTION_OPTIONS.map((opt) => (
+            <option key={opt.value} value={opt.value}>
+              {opt.label}
+            </option>
+          ))}
+        </select>
+      </div>
+
+      {/* 配置汇总 */}
+      <div className="aa-generate-section">
+        <div className="aa-config-summary">
+          <div className="aa-config-summary__row">
+            <span>出镜视频</span>
+            {summary.videoName ? (
+              <span className="aa-config-summary__value">{summary.videoName}</span>
+            ) : (
+              <span className="aa-config-summary__empty">未配置</span>
+            )}
+          </div>
+          <div className="aa-config-summary__row">
+            <span>音色</span>
+            {summary.voiceName ? (
+              <span className="aa-config-summary__value">{summary.voiceName}</span>
+            ) : (
+              <span className="aa-config-summary__empty">未配置</span>
+            )}
+          </div>
+          <div className="aa-config-summary__row">
+            <span>文案</span>
+            {summary.scriptLength > 0 ? (
+              <span className="aa-config-summary__value">{summary.scriptLength} 字</span>
+            ) : (
+              <span className="aa-config-summary__empty">未配置</span>
+            )}
+          </div>
+          <div className="aa-config-summary__row">
+            <span>对口型</span>
+            {lipsync ? (
+              <span className={`aa-status-badge ${lipsync.cls}`}>{lipsync.text}</span>
+            ) : (
+              <span className="aa-config-summary__empty">未配置</span>
+            )}
+          </div>
+          <div className="aa-config-summary__row">
+            <span>B-roll 画面插入</span>
+            <span className="aa-config-summary__value">
+              {summary.brollCount > 0 ? `${summary.brollCount} 段` : "无"}
+            </span>
+          </div>
+          <div className="aa-config-summary__row">
+            <span>标题</span>
+            {summary.hasTitle ? (
+              <span className="aa-config-summary__value">已设置</span>
+            ) : (
+              <span className="aa-config-summary__empty">未配置</span>
+            )}
+          </div>
+          <div className="aa-config-summary__row">
+            <span>封面</span>
+            {summary.hasCover ? (
+              <span className="aa-config-summary__value">已开启</span>
+            ) : (
+              <span className="aa-config-summary__empty">未配置</span>
+            )}
+          </div>
+        </div>
+
+        {/* 生成按钮 */}
+        <button
+          type="button"
+          className="aa-btn aa-btn--generate aa-btn--full"
+          disabled={!canGenerate}
+          onClick={onGenerate}
+        >
+          {isGenerating ? "⏳ 生成中..." : "🚀 开始生成视频"}
+        </button>
+        {summary.lipsyncStatus !== "completed" && !isGenerating && (
+          <div style={{ marginTop: 8, fontSize: 11, color: "#8c8ca1", textAlign: "center" }}>
+            请先完成对口型生成
+          </div>
+        )}
+      </div>
+    </div>
+  )
+}
+
+export default PanelCoverAndGenerate

apps/web/src/pages/ai-avatar/components/PanelScriptAndLipsync.tsx

@@ -0,0 +1,222 @@
+/**
+ * AI数字人 — 文案 & 对口型面板（面板4）
+ * 上半区：文案（文案库选择 / 手动输入）；下半区：对口型视频预览（9:16）+ B-roll 画面
+ */
+import { useState } from "react"
+import type { LipsyncJob, BRollSegment } from "../types"
+
+interface PanelScriptAndLipsyncProps {
+  scriptText: string
+  onScriptTextChange: (text: string) => void
+  onOpenScriptModal: () => void
+  lipsyncJob: LipsyncJob | null
+  onGenerateLipsync: () => void
+  bRollSegments: BRollSegment[]
+  onOpenBRollModal: () => void
+  onRemoveBRoll: (id: string) => void
+}
+
+type ScriptTab = "library" | "manual"
+
+const BROLL_MODE_LABEL: Record<BRollSegment["mode"], string> = {
+  fullscreen: "全屏",
+  pip: "画中画",
+}
+
+function formatTime(seconds: number): string {
+  const m = Math.floor(seconds / 60)
+  const s = Math.round(seconds % 60)
+  return `${m}:${s.toString().padStart(2, "0")}`
+}
+
+export function PanelScriptAndLipsync({
+  scriptText,
+  onScriptTextChange,
+  onOpenScriptModal,
+  lipsyncJob,
+  onGenerateLipsync,
+  bRollSegments,
+  onOpenBRollModal,
+  onRemoveBRoll,
+}: PanelScriptAndLipsyncProps) {
+  const [scriptTab, setScriptTab] = useState<ScriptTab>("library")
+
+  /* 对口型状态判断 */
+  const isGenerating = lipsyncJob?.status === "pending" || lipsyncJob?.status === "processing"
+  const isDone = lipsyncJob?.status === "completed"
+  const isFailed = lipsyncJob?.status === "failed"
+
+  const statusText =
+    lipsyncJob?.status === "processing"
+      ? "对口型生成中…"
+      : lipsyncJob?.status === "pending"
+        ? "排队中…"
+        : "对口型生成中…"
+
+  return (
+    <div className="aa-script-lipsync">
+      {/* ── 上半区：文案 ── */}
+      <div className="aa-script-tabs">
+        <button
+          type="button"
+          className={`aa-script-tab${scriptTab === "library" ? " active" : ""}`}
+          onClick={() => setScriptTab("library")}
+        >
+          从文案库选择
+        </button>
+        <button
+          type="button"
+          className={`aa-script-tab${scriptTab === "manual" ? " active" : ""}`}
+          onClick={() => setScriptTab("manual")}
+        >
+          手动输入
+        </button>
+      </div>
+
+      {scriptTab === "library" && (
+        <button
+          type="button"
+          className="aa-btn aa-btn--ghost aa-btn--full"
+          style={{ marginBottom: 8 }}
+          onClick={onOpenScriptModal}
+        >
+          📚 从文案库选择文案
+        </button>
+      )}
+
+      <textarea
+        className="aa-textarea"
+        value={scriptText}
+        readOnly={scriptTab === "library"}
+        placeholder={
+          scriptTab === "library" ? "点击上方按钮，从文案库选择文案…" : "请输入数字人口播文案…"
+        }
+        onChange={(e) => onScriptTextChange(e.target.value)}
+      />
+      <div className="aa-char-count">{scriptText.length} 字</div>
+
+      {/* ── B-roll 画面 ── */}
+      <div className="aa-lipsync-section">
+        <div className="aa-lipsync-section__title">
+          <span style={{ marginRight: 8 }}>🎞️ 插入画面</span>
+          {bRollSegments.length > 0 && (
+            <span className="aa-broll-badge">🎬 {bRollSegments.length} 个画面</span>
+          )}
+        </div>
+        <div className="aa-lipsync-actions">
+          <button
+            type="button"
+            className="aa-btn aa-btn--primary aa-btn--full"
+            onClick={onOpenBRollModal}
+          >
+            🎬 插入画面
+          </button>
+        </div>
+
+        {bRollSegments.length > 0 && (
+          <div className="aa-broll-list">
+            {bRollSegments.map((seg) => (
+              <div key={seg.id} className="aa-broll-item">
+                {seg.asset.thumbnail_url || seg.asset.file_url ? (
+                  <img
+                    className="aa-broll-item__thumb"
+                    src={seg.asset.thumbnail_url || seg.asset.file_url}
+                    alt={seg.asset.name}
+                  />
+                ) : (
+                  <span className="aa-broll-item__thumb" style={{ padding: "6px 4px" }}>
+                    🎬
+                  </span>
+                )}
+                <div className="aa-broll-item__info">
+                  <div
+                    style={{
+                      overflow: "hidden",
+                      textOverflow: "ellipsis",
+                      whiteSpace: "nowrap",
+                    }}
+                  >
+                    {seg.asset.name}
+                  </div>
+                  <div style={{ fontSize: 11, color: "#8c8ca1", marginTop: 2 }}>
+                    {BROLL_MODE_LABEL[seg.mode]} · {formatTime(seg.start_time)}-
+                    {formatTime(seg.end_time)}
+                  </div>
+                </div>
+                <button
+                  type="button"
+                  className="aa-broll-item__remove"
+                  title="删除"
+                  onClick={() => onRemoveBRoll(seg.id)}
+                >
+                  ✕
+                </button>
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+
+      {/* ── 下半区：对口型预览（竖屏 9:16） ── */}
+      <div className="aa-lipsync-section">
+        <div className="aa-lipsync-section__title">对口型预览</div>
+
+        <div className="aa-lipsync-preview">
+          {isDone && lipsyncJob?.output_video_url ? (
+            <video src={lipsyncJob.output_video_url} controls />
+          ) : isGenerating ? (
+            <div style={{ width: "80%", textAlign: "center", color: "#fff" }}>
+              <div style={{ fontSize: 13, marginBottom: 8 }}>
+                {statusText} {Math.round(lipsyncJob?.progress ?? 0)}%
+              </div>
+              <div className="aa-progress">
+                <div
+                  className="aa-progress__bar"
+                  style={{ width: `${lipsyncJob?.progress ?? 0}%` }}
+                />
+              </div>
+            </div>
+          ) : (
+            <div className="aa-video-preview__placeholder">
+              {isFailed ? (
+                <>
+                  <div style={{ fontSize: 28, marginBottom: 8 }}>❌</div>
+                  <div>对口型生成失败</div>
+                  {lipsyncJob?.error_message && (
+                    <div style={{ fontSize: 11, marginTop: 4, color: "#fca5a5" }}>
+                      {lipsyncJob.error_message}
+                    </div>
+                  )}
+                </>
+              ) : (
+                "生成对口型视频后在此预览"
+              )}
+            </div>
+          )}
+        </div>
+
+        <div className="aa-lipsync-actions">
+          {isDone ? (
+            <button type="button" className="aa-btn aa-btn--full" onClick={onGenerateLipsync}>
+              🔄 重新生成对口型
+            </button>
+          ) : isGenerating ? (
+            <button type="button" className="aa-btn aa-btn--full" disabled>
+              对口型生成中…
+            </button>
+          ) : (
+            <button
+              type="button"
+              className="aa-btn aa-btn--primary aa-btn--full"
+              onClick={onGenerateLipsync}
+            >
+              🎬 生成对口型视频
+            </button>
+          )}
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default PanelScriptAndLipsync

apps/web/src/pages/ai-avatar/components/PanelTitleConfig.tsx

@@ -0,0 +1,130 @@
+/**
+ * AI数字人 — 面板4：标题配置
+ *
+ * 关键：直接复用智能剪辑（generate）模块的 TitleStylePanel 标题样式面板，
+ * 不重新开发标题预设/字体/位置等样式能力。本组件只负责：
+ * - 主标题文字输入
+ * - AiAvatarTitleConfig ↔ TitleSettings 的双向适配
+ * - 自动生成字幕开关
+ */
+import React, { useMemo, useState } from "react"
+import TitleStylePanel from "@/pages/generate/components/title/TitleStylePanel"
+import type { TitleSettings } from "@/pages/generate/types"
+import {
+  POSITION_OPTIONS,
+  FONT_OPTIONS,
+  TITLE_PRESETS,
+  getFontFamily,
+} from "@/pages/generate/constants"
+import type { AiAvatarTitleConfig } from "../types"
+
+interface PanelTitleConfigProps {
+  titleConfig: AiAvatarTitleConfig
+  onUpdate: (partial: Partial<AiAvatarTitleConfig>) => void
+}
+
+const PanelTitleConfig: React.FC<PanelTitleConfigProps> = ({ titleConfig, onUpdate }) => {
+  /** TitleStylePanel 内部高亮的预设 key（面板本地状态） */
+  const [activePreset, setActivePreset] = useState<string | null>(null)
+
+  /** AiAvatarTitleConfig → TitleSettings（补齐 aiAutoSelect / 自由坐标字段） */
+  const titleSettings: TitleSettings = useMemo(
+    () => ({
+      aiAutoSelect: false,
+      title: titleConfig.title,
+      position: titleConfig.position,
+      font: titleConfig.font,
+      size: titleConfig.size,
+      bold: titleConfig.bold,
+      italic: titleConfig.italic,
+      stroke: titleConfig.stroke,
+      shadow: titleConfig.shadow,
+      color: titleConfig.color,
+      posX: null,
+      posY: null,
+    }),
+    [titleConfig],
+  )
+
+  /** 应用预设：与智能剪辑一致，只覆盖 color/bold/italic/stroke/shadow，不改变字号 */
+  const handleApplyPreset = (presetKey: string) => {
+    const preset = TITLE_PRESETS.find((p) => p.key === presetKey)
+    if (!preset) return
+    setActivePreset(presetKey)
+    onUpdate({
+      color: preset.style.color,
+      bold: preset.style.bold,
+      italic: preset.style.italic,
+      stroke: preset.style.stroke,
+      shadow: preset.style.shadow,
+    })
+  }
+
+  return (
+    <div className="aa-title-config">
+      {/* 主标题输入 */}
+      <div className="aa-form-field">
+        <label className="aa-label">主标题</label>
+        <input
+          className="aa-input aa-title-input"
+          type="text"
+          placeholder="输入视频标题（留空则不显示标题）"
+          value={titleConfig.title}
+          maxLength={30}
+          onChange={(e) => onUpdate({ title: e.target.value })}
+        />
+        {titleConfig.title && (
+          <div
+            style={{
+              fontSize: 13,
+              padding: "6px 8px",
+              background: "#f8f8fc",
+              borderRadius: 6,
+              fontFamily: getFontFamily(titleConfig.font),
+              fontWeight: titleConfig.bold ? 700 : 400,
+              fontStyle: titleConfig.italic ? "italic" : "normal",
+              color: titleConfig.color,
+              textShadow: titleConfig.shadow ? "1px 1px 3px rgba(0,0,0,0.6)" : undefined,
+              overflow: "hidden",
+              textOverflow: "ellipsis",
+              whiteSpace: "nowrap",
+            }}
+          >
+            {titleConfig.title}
+          </div>
+        )}
+      </div>
+
+      {/* 标题样式：直接复用智能剪辑 TitleStylePanel（位置/字体/字号/样式/预设） */}
+      <TitleStylePanel
+        settings={titleSettings}
+        onUpdatePosition={(position) => onUpdate({ position })}
+        onUpdateFont={(font) => onUpdate({ font })}
+        onUpdateSize={(size) => onUpdate({ size: Math.min(128, Math.max(16, size)) })}
+        onToggleBold={() => onUpdate({ bold: !titleConfig.bold })}
+        onToggleItalic={() => onUpdate({ italic: !titleConfig.italic })}
+        onToggleStroke={() => onUpdate({ stroke: !titleConfig.stroke })}
+        onToggleShadow={() => onUpdate({ shadow: !titleConfig.shadow })}
+        onApplyPreset={handleApplyPreset}
+        activePreset={activePreset}
+        titlePresets={TITLE_PRESETS}
+        POSITION_OPTIONS={POSITION_OPTIONS}
+        FONT_OPTIONS={FONT_OPTIONS}
+      />
+
+      {/* 自动生成字幕 */}
+      <div className="aa-subtitle-toggle">
+        <label className="aa-checkbox-row">
+          <input
+            type="checkbox"
+            checked={titleConfig.auto_subtitle}
+            onChange={(e) => onUpdate({ auto_subtitle: e.target.checked })}
+          />
+          自动生成字幕
+        </label>
+      </div>
+    </div>
+  )
+}
+
+export default PanelTitleConfig

apps/web/src/pages/ai-avatar/components/PanelVideoSelector.tsx

@@ -0,0 +1,91 @@
+/**
+ * AI数字人 — 出镜视频选择面板
+ * - 未选视频：虚线上传区，点击打开素材库弹窗
+ * - 已选视频：竖屏 9:16 预览播放器 + 视频信息卡片 + 移除按钮
+ */
+import type { AssetItem } from "@/api/assets"
+
+export interface PanelVideoSelectorProps {
+  selectedVideo: AssetItem | null
+  /** 触发打开素材库弹窗 */
+  onSelectVideo: () => void
+  onRemoveVideo: () => void
+}
+
+/** 格式化时长（秒 → mm:ss） */
+function formatDuration(seconds?: number): string {
+  if (typeof seconds !== "number" || !Number.isFinite(seconds) || seconds <= 0) {
+    return "00:00"
+  }
+  return `${Math.floor(seconds / 60)}:${String(Math.floor(seconds % 60)).padStart(2, "0")}`
+}
+
+export function PanelVideoSelector({
+  selectedVideo,
+  onSelectVideo,
+  onRemoveVideo,
+}: PanelVideoSelectorProps) {
+  /* 未选视频：虚线上传区，点击打开素材库弹窗 */
+  if (!selectedVideo) {
+    return (
+      <div
+        className="aa-upload-zone"
+        role="button"
+        tabIndex={0}
+        onClick={onSelectVideo}
+        onKeyDown={(e) => {
+          if (e.key === "Enter" || e.key === " ") {
+            e.preventDefault()
+            onSelectVideo()
+          }
+        }}
+      >
+        <div className="aa-upload-zone__icon">🎬</div>
+        <div className="aa-upload-zone__text">从素材库选择视频</div>
+      </div>
+    )
+  }
+
+  const width = selectedVideo.metadata?.width
+  const height = selectedVideo.metadata?.height
+  const duration = selectedVideo.duration ?? selectedVideo.metadata?.duration
+  const fileUrl = selectedVideo.file_url ?? ""
+
+  return (
+    <div>
+      {/* 竖屏 9:16 视频预览播放器 */}
+      <div className="aa-video-preview">
+        {fileUrl ? (
+          <video src={fileUrl} poster={selectedVideo.thumbnail_url} controls playsInline />
+        ) : (
+          <div className="aa-video-preview__placeholder">视频暂不可预览</div>
+        )}
+      </div>
+
+      {/* 视频信息卡片：文件名 / 时长 / 分辨率 */}
+      <div className="aa-video-info">
+        <div className="aa-video-info__row">
+          <span>文件名</span>
+          <span title={selectedVideo.name}>{selectedVideo.name}</span>
+        </div>
+        <div className="aa-video-info__row">
+          <span>时长</span>
+          <span>{formatDuration(duration)}</span>
+        </div>
+        <div className="aa-video-info__row">
+          <span>分辨率</span>
+          <span>{width && height ? `${width}×${height}` : "—"}</span>
+        </div>
+      </div>
+
+      <button
+        type="button"
+        className="aa-btn aa-btn--danger aa-btn--full"
+        style={{ marginTop: 10 }}
+        onClick={onRemoveVideo}
+      >
+        移除视频
+      </button>
+    </div>
+  )
+}

apps/web/src/pages/ai-avatar/components/PanelVoiceSelector.tsx

@@ -0,0 +1,264 @@
+/**
+ * AI数字人 — 配音库面板（面板3）
+ * 音色来源切换（系统预设 / 我的音色）、音色选择与试听、情绪/语速/语言参数
+ */
+import { useEffect, useRef, useState } from "react"
+import { fetchVoices } from "@/api/voices/voices"
+import type { UnifiedVoiceItem } from "@/api/voices/types"
+import {
+  type VoiceSource,
+  type VoiceEmotion,
+  type VoiceLanguage,
+  VOICE_EMOTION_OPTIONS,
+  VOICE_LANGUAGE_OPTIONS,
+} from "../types"
+
+interface PanelVoiceSelectorProps {
+  voiceSource: VoiceSource
+  onVoiceSourceChange: (source: VoiceSource) => void
+  selectedVoice: UnifiedVoiceItem | null
+  onSelectVoice: (voice: UnifiedVoiceItem) => void
+  emotion: VoiceEmotion
+  onEmotionChange: (e: VoiceEmotion) => void
+  speed: number
+  onSpeedChange: (s: number) => void
+  language: VoiceLanguage
+  onLanguageChange: (l: VoiceLanguage) => void
+}
+
+export function PanelVoiceSelector({
+  voiceSource,
+  onVoiceSourceChange,
+  selectedVoice,
+  onSelectVoice,
+  emotion,
+  onEmotionChange,
+  speed,
+  onSpeedChange,
+  language,
+  onLanguageChange,
+}: PanelVoiceSelectorProps) {
+  const [voices, setVoices] = useState<UnifiedVoiceItem[]>([])
+  const [loading, setLoading] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+  const [previewingId, setPreviewingId] = useState<string | null>(null)
+  const audioRef = useRef<HTMLAudioElement | null>(null)
+
+  /* 切换来源时重新获取音色列表 */
+  useEffect(() => {
+    let cancelled = false
+    const loadVoices = async () => {
+      setLoading(true)
+      setError(null)
+      try {
+        const res = await fetchVoices({ type: voiceSource })
+        if (!cancelled) setVoices(res.items || [])
+      } catch (err) {
+        if (!cancelled) setError(err instanceof Error ? err.message : "音色加载失败")
+      } finally {
+        if (!cancelled) setLoading(false)
+      }
+    }
+    loadVoices()
+    return () => {
+      cancelled = true
+    }
+  }, [voiceSource])
+
+  /* 卸载时停止试听 */
+  useEffect(() => {
+    return () => {
+      if (audioRef.current) {
+        audioRef.current.pause()
+        audioRef.current = null
+      }
+    }
+  }, [])
+
+  const stopPreview = () => {
+    if (audioRef.current) {
+      audioRef.current.pause()
+      audioRef.current = null
+    }
+    setPreviewingId(null)
+  }
+
+  const handlePreview = (voice: UnifiedVoiceItem) => {
+    const url = voice.preview_url || voice.audio_url
+    if (!url) return
+    /* 再次点击当前试听音色 → 停止 */
+    if (previewingId === voice.id) {
+      stopPreview()
+      return
+    }
+    if (audioRef.current) {
+      audioRef.current.pause()
+      audioRef.current = null
+    }
+    const audio = new Audio(url)
+    audioRef.current = audio
+    setPreviewingId(voice.id)
+    audio.onended = () => {
+      if (audioRef.current === audio) {
+        audioRef.current = null
+        setPreviewingId(null)
+      }
+    }
+    audio.onerror = () => {
+      if (audioRef.current === audio) {
+        audioRef.current = null
+        setPreviewingId(null)
+        setError("试听音频加载失败")
+      }
+    }
+    void audio.play().catch(() => {
+      setPreviewingId(null)
+      setError("试听播放失败")
+    })
+  }
+
+  const handleSpeedChange = (value: string) => {
+    const parsed = parseFloat(value)
+    if (Number.isNaN(parsed)) return
+    const clamped = Math.min(2.0, Math.max(0.5, parsed))
+    onSpeedChange(clamped)
+  }
+
+  return (
+    <div className="aa-voice-selector">
+      {/* 音色来源切换 */}
+      <div className="aa-voice-source-toggle">
+        <button
+          type="button"
+          className={`aa-voice-source-btn${voiceSource === "preset" ? " active" : ""}`}
+          onClick={() => onVoiceSourceChange("preset")}
+        >
+          系统预设
+        </button>
+        <button
+          type="button"
+          className={`aa-voice-source-btn${voiceSource === "clone" ? " active" : ""}`}
+          onClick={() => onVoiceSourceChange("clone")}
+        >
+          我的音色
+        </button>
+      </div>
+
+      {/* 音色列表 */}
+      {loading ? (
+        <div className="aa-empty">
+          <div className="aa-empty__icon">⏳</div>
+          <div>音色加载中…</div>
+        </div>
+      ) : error ? (
+        <div className="aa-empty">
+          <div className="aa-empty__icon">⚠️</div>
+          <div>{error}</div>
+        </div>
+      ) : voices.length === 0 ? (
+        <div className="aa-empty">
+          <div className="aa-empty__icon">🎙️</div>
+          <div>{voiceSource === "clone" ? "还没有克隆音色" : "暂无预置音色"}</div>
+        </div>
+      ) : (
+        <div className="aa-voice-list">
+          {voices.map((voice) => {
+            const selected = selectedVoice?.id === voice.id
+            const previewUrl = voice.preview_url || voice.audio_url
+            return (
+              <div
+                key={voice.id}
+                className={`aa-voice-card${selected ? " selected" : ""}`}
+                onClick={() => onSelectVoice(voice)}
+              >
+                <span className="aa-voice-card__radio" />
+                <div className="aa-voice-card__info">
+                  <div className="aa-voice-card__name">{voice.name}</div>
+                  {voice.description && (
+                    <div className="aa-voice-card__desc">{voice.description}</div>
+                  )}
+                </div>
+                <button
+                  type="button"
+                  className="aa-voice-card__preview"
+                  title={previewingId === voice.id ? "停止试听" : "试听"}
+                  disabled={!previewUrl}
+                  onClick={(e) => {
+                    e.stopPropagation()
+                    handlePreview(voice)
+                  }}
+                >
+                  {previewingId === voice.id ? "⏸" : "▶"}
+                </button>
+              </div>
+            )
+          })}
+        </div>
+      )}
+
+      {/* 我的音色：克隆入口 */}
+      {voiceSource === "clone" && (
+        <div className="aa-clone-entry">
+          <a href="/app/voice-clone">+ 克隆新音色</a>
+        </div>
+      )}
+
+      {/* 配音参数 */}
+      <div className="aa-voice-params">
+        <div className="aa-voice-params__row">
+          <div className="aa-voice-params__field">
+            <label className="aa-label" htmlFor="aa-voice-emotion">
+              情绪
+            </label>
+            <select
+              id="aa-voice-emotion"
+              className="aa-select"
+              value={emotion}
+              onChange={(e) => onEmotionChange(e.target.value as VoiceEmotion)}
+            >
+              {VOICE_EMOTION_OPTIONS.map((opt) => (
+                <option key={opt.value} value={opt.value}>
+                  {opt.label}
+                </option>
+              ))}
+            </select>
+          </div>
+          <div className="aa-voice-params__field">
+            <label className="aa-label" htmlFor="aa-voice-language">
+              语言
+            </label>
+            <select
+              id="aa-voice-language"
+              className="aa-select"
+              value={language}
+              onChange={(e) => onLanguageChange(e.target.value as VoiceLanguage)}
+            >
+              {VOICE_LANGUAGE_OPTIONS.map((opt) => (
+                <option key={opt.value} value={opt.value}>
+                  {opt.label}
+                </option>
+              ))}
+            </select>
+          </div>
+        </div>
+        <div className="aa-voice-params__field">
+          <label className="aa-label" htmlFor="aa-voice-speed">
+            语速（{speed.toFixed(1)}x）
+          </label>
+          <input
+            id="aa-voice-speed"
+            type="number"
+            className="aa-input"
+            min={0.5}
+            max={2.0}
+            step={0.1}
+            value={speed}
+            onChange={(e) => handleSpeedChange(e.target.value)}
+          />
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default PanelVoiceSelector

apps/web/src/pages/ai-avatar/hooks/useAiAvatar.ts

@@ -0,0 +1,141 @@
+/**
+ * AI数字人 — 页面全局状态管理 hook（v3）
+ */
+import { useState, useCallback } from "react"
+import type { AssetItem } from "@/api/assets"
+import type { UnifiedVoiceItem } from "@/api/voices/types"
+import {
+  type VoiceSource,
+  type VoiceEmotion,
+  type VoiceLanguage,
+  type Script,
+  type LipsyncJob,
+  type BRollSegment,
+  type AiAvatarTitleConfig,
+  type AiAvatarCoverConfig,
+  DEFAULT_TITLE_CONFIG,
+  DEFAULT_COVER_CONFIG,
+} from "../types"
+
+export function useAiAvatar() {
+  /* ── 面板1：出镜视频 ── */
+  const [selectedVideo, setSelectedVideo] = useState<AssetItem | null>(null)
+  const [showAssetPicker, setShowAssetPicker] = useState(false)
+
+  /* ── 面板2：配音库 ── */
+  const [voiceSource, setVoiceSource] = useState<VoiceSource>("preset")
+  const [selectedVoice, setSelectedVoice] = useState<UnifiedVoiceItem | null>(null)
+  const [emotion, setEmotion] = useState<VoiceEmotion>("natural")
+  const [speed, setSpeed] = useState(1.0)
+  const [language, setLanguage] = useState<VoiceLanguage>("mandarin")
+
+  /* ── 面板3：文案 & 对口型 ── */
+  const [script, setScript] = useState<Script | null>(null)
+  const [scriptText, setScriptText] = useState("")
+  const [lipsyncJob, setLipsyncJob] = useState<LipsyncJob | null>(null)
+  const [showScriptModal, setShowScriptModal] = useState(false)
+  const [showBRollModal, setShowBRollModal] = useState(false)
+
+  /* ── 面板3.5：B-roll ── */
+  const [bRollSegments, setBRollSegments] = useState<BRollSegment[]>([])
+
+  /* ── 面板4：标题配置 ── */
+  const [titleConfig, setTitleConfig] = useState<AiAvatarTitleConfig>(DEFAULT_TITLE_CONFIG)
+
+  /* ── 面板5：封面 & 生成 ── */
+  const [coverConfig, setCoverConfig] = useState<AiAvatarCoverConfig>(DEFAULT_COVER_CONFIG)
+  const [resolution, setResolution] = useState("1080p")
+  const [isGenerating, setIsGenerating] = useState(false)
+
+  /* ── Actions ── */
+  const selectVideo = useCallback((asset: AssetItem) => {
+    setSelectedVideo(asset)
+    setShowAssetPicker(false)
+  }, [])
+
+  const removeVideo = useCallback(() => {
+    setSelectedVideo(null)
+  }, [])
+
+  const selectScript = useCallback((s: Script) => {
+    setScript(s)
+    setScriptText(s.content)
+    setShowScriptModal(false)
+  }, [])
+
+  const addBRollSegment = useCallback((segment: BRollSegment) => {
+    setBRollSegments((prev) => [...prev, segment])
+  }, [])
+
+  const removeBRollSegment = useCallback((id: string) => {
+    setBRollSegments((prev) => prev.filter((s) => s.id !== id))
+  }, [])
+
+  const updateTitleConfig = useCallback((partial: Partial<AiAvatarTitleConfig>) => {
+    setTitleConfig((prev) => ({ ...prev, ...partial }))
+  }, [])
+
+  const reset = useCallback(() => {
+    setSelectedVideo(null)
+    setSelectedVoice(null)
+    setScript(null)
+    setScriptText("")
+    setLipsyncJob(null)
+    setBRollSegments([])
+    setTitleConfig(DEFAULT_TITLE_CONFIG)
+    setCoverConfig(DEFAULT_COVER_CONFIG)
+    setResolution("1080p")
+    setIsGenerating(false)
+  }, [])
+
+  return {
+    // 面板1
+    selectedVideo,
+    showAssetPicker,
+    setShowAssetPicker,
+    selectVideo,
+    removeVideo,
+    // 面板2
+    voiceSource,
+    setVoiceSource,
+    selectedVoice,
+    setSelectedVoice,
+    emotion,
+    setEmotion,
+    speed,
+    setSpeed,
+    language,
+    setLanguage,
+    // 面板3
+    script,
+    setScript,
+    scriptText,
+    setScriptText,
+    lipsyncJob,
+    setLipsyncJob,
+    showScriptModal,
+    setShowScriptModal,
+    showBRollModal,
+    setShowBRollModal,
+    selectScript,
+    // B-roll
+    bRollSegments,
+    addBRollSegment,
+    removeBRollSegment,
+    // 面板4
+    titleConfig,
+    updateTitleConfig,
+    setTitleConfig,
+    // 面板5
+    coverConfig,
+    setCoverConfig,
+    resolution,
+    setResolution,
+    isGenerating,
+    setIsGenerating,
+    // 全局
+    reset,
+  }
+}
+
+export type UseAiAvatarReturn = ReturnType<typeof useAiAvatar>

apps/web/src/pages/ai-avatar/types.ts

@@ -0,0 +1,121 @@
+/**
+ * AI数字人 — TypeScript 类型定义（v3）
+ */
+import type { AssetItem } from "@/api/assets"
+
+/* ── 音色来源切换 ── */
+export type VoiceSource = "preset" | "clone"
+
+/* ── 情绪 ── */
+export type VoiceEmotion = "natural" | "excited" | "calm" | "friendly"
+
+export const VOICE_EMOTION_OPTIONS: { value: VoiceEmotion; label: string }[] = [
+  { value: "natural", label: "自然" },
+  { value: "excited", label: "兴奋" },
+  { value: "calm", label: "沉稳" },
+  { value: "friendly", label: "亲切" },
+]
+
+/* ── 语言 ── */
+export type VoiceLanguage = "mandarin" | "english" | "cantonese"
+
+export const VOICE_LANGUAGE_OPTIONS: { value: VoiceLanguage; label: string }[] = [
+  { value: "mandarin", label: "普通话" },
+  { value: "english", label: "English" },
+  { value: "cantonese", label: "粤语" },
+]
+
+/* ── 对口型任务状态 ── */
+export type LipsyncStatus = "idle" | "pending" | "processing" | "completed" | "failed"
+
+/* ── 文案 ── */
+export interface Script {
+  id: string
+  title: string
+  content: string
+  char_count: number
+  created_at: string
+  updated_at?: string
+}
+
+/* ── 对口型任务 ── */
+export interface LipsyncJob {
+  id: string
+  status: LipsyncStatus
+  progress: number
+  output_video_url: string | null
+  error_message: string | null
+  created_at: string
+}
+
+/* ── B-roll 画面插入 ── */
+export type BRollInsertMode = "fullscreen" | "pip"
+export type PipPosition = "top-left" | "top-right" | "bottom-left" | "bottom-right"
+
+export interface BRollSegment {
+  id: string
+  asset: AssetItem
+  script_segment_index: number
+  start_time: number
+  end_time: number
+  mode: BRollInsertMode
+  pip_position: PipPosition
+  pip_scale: number
+}
+
+/* ── 标题配置 ── */
+export interface AiAvatarTitleConfig {
+  title: string
+  position: string
+  font: string
+  size: number
+  bold: boolean
+  italic: boolean
+  stroke: boolean
+  shadow: boolean
+  color: string
+  auto_subtitle: boolean
+}
+
+/* ── 封面配置 ── */
+export interface AiAvatarCoverConfig {
+  enabled: boolean
+  mode: "auto_frame" | "upload"
+  frame_time: number
+  upload_url: string | null
+  thumbnail_url: string | null
+}
+
+/* ── 渲染任务 ── */
+export type RenderStatus = "pending" | "processing" | "completed" | "failed" | "cancelled"
+
+export interface RenderJob {
+  id: string
+  status: RenderStatus
+  progress: number
+  output_video_url: string | null
+  error_message: string | null
+  created_at: string
+}
+
+/* ── 默认值 ── */
+export const DEFAULT_TITLE_CONFIG: AiAvatarTitleConfig = {
+  title: "",
+  position: "top",
+  font: "思源黑体",
+  size: 28,
+  bold: true,
+  italic: false,
+  stroke: false,
+  shadow: false,
+  color: "#ffffff",
+  auto_subtitle: true,
+}
+
+export const DEFAULT_COVER_CONFIG: AiAvatarCoverConfig = {
+  enabled: true,
+  mode: "auto_frame",
+  frame_time: 0,
+  upload_url: null,
+  thumbnail_url: null,
+}

apps/web/src/pages/editing-planner/EditingPlanner.css

@@ -6440,3 +6440,49 @@
   opacity: 0.6;
   cursor: not-allowed;
 }
+
+/* ═══ 标题设置 — 颜色预设 ═══ */
+.ep-color-presets {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  flex-wrap: wrap;
+}
+
+.ep-color-swatch {
+  width: 24px;
+  height: 24px;
+  border-radius: 4px;
+  border: 2px solid transparent;
+  cursor: pointer;
+  transition:
+    border-color 0.15s,
+    transform 0.1s;
+}
+
+.ep-color-swatch:hover {
+  transform: scale(1.1);
+}
+
+.ep-color-swatch.active {
+  border-color: var(--ep-primary, #4f8cff);
+}
+
+.ep-color-picker {
+  width: 28px;
+  height: 28px;
+  border: none;
+  border-radius: 4px;
+  cursor: pointer;
+  padding: 0;
+  background: none;
+}
+
+.ep-color-picker::-webkit-color-swatch-wrapper {
+  padding: 0;
+}
+
+.ep-color-picker::-webkit-color-swatch {
+  border: 1px solid rgba(255, 255, 255, 0.2);
+  border-radius: 4px;
+}

apps/web/src/pages/editing-planner/EditingPlanner.tsx

@@ -196,6 +196,8 @@ const EditingPlanner: React.FC = () => {
 
         {/* 右栏 260px：设置面板 */}
         <RightPanel
+          titleConfig={titleConfig}
+          onTitleConfigChange={setTitleConfig}
           rightTab={rightTab}
           onTabChange={setRightTab}
           selectedClip={clipOps.selectedClip}

apps/web/src/pages/editing-planner/components/ClipPropertiesPanel.tsx

@@ -5,12 +5,15 @@
 import React from "react"
 import type { ClipPropertiesPanelProps } from "@/pages/editing-planner/types/clipProperties"
 import SubtitleSettingsSection from "./clip-properties/SubtitleSettingsSection"
+import TitleSettingsSection from "./clip-properties/TitleSettingsSection"
 import BgmSettingsSection from "./clip-properties/BgmSettingsSection"
 import ClipDetailSection from "./clip-properties/ClipDetailSection"
 import StatsSection from "./clip-properties/StatsSection"
 import { useVoicePreview } from "@/pages/editing-planner/hooks/useVoicePreview"
 
 const ClipPropertiesPanel: React.FC<ClipPropertiesPanelProps> = ({
+  titleConfig,
+  onTitleConfigChange,
   selectedClip,
   subtitleSettings,
   bgmSettings,
@@ -40,6 +43,11 @@ const ClipPropertiesPanel: React.FC<ClipPropertiesPanelProps> = ({
 
   return (
     <div className="ep-right-panel">
+      {/* ═══ 标题设置 — #1789 ═══ */}
+      {titleConfig && onTitleConfigChange && (
+        <TitleSettingsSection config={titleConfig} onChange={onTitleConfigChange} />
+      )}
+
       {/* ═══ 字幕设置 ═══ */}
       <SubtitleSettingsSection
         settings={subtitleSettings}

apps/web/src/pages/editing-planner/components/RightPanel.tsx

@@ -5,9 +5,12 @@ import type { ClipData } from "../types"
 import type { SubtitleStyleConfig } from "../types/subtitle"
 import type { BgmMixConfig } from "@/api/bgm"
 import type { TemplateMode } from "@/api/editing-planner"
+import type { TitleConfig } from "@/api/template-editor"
 import type { AssetItem } from "@/api/assets"
 
 interface RightPanelProps {
+  titleConfig?: TitleConfig
+  onTitleConfigChange?: (config: TitleConfig | ((prev: TitleConfig) => TitleConfig)) => void
   rightTab: "properties" | "clips"
   onTabChange: (tab: "properties" | "clips") => void
   // 属性 tab
@@ -46,6 +49,8 @@ interface RightPanelProps {
 }
 
 const RightPanel: React.FC<RightPanelProps> = ({
+  titleConfig,
+  onTitleConfigChange,
   rightTab,
   onTabChange,
   selectedClip,
@@ -118,6 +123,8 @@ const RightPanel: React.FC<RightPanelProps> = ({
             >["onBgmSettingsChange"]
             return (
               <ClipPropertiesPanel
+                titleConfig={titleConfig}
+                onTitleConfigChange={onTitleConfigChange}
                 selectedClip={selectedClip}
                 subtitleSettings={sub}
                 bgmSettings={bgm}

apps/web/src/pages/editing-planner/components/clip-properties/TitleSettingsSection.tsx

@@ -0,0 +1,136 @@
+/**
+ * 标题设置区块 — #1789
+ * 提供字号滑块、字体预设、位置、颜色等控制入口
+ */
+import React from "react"
+import type { TitleConfig } from "@/api/template-editor"
+import { POSITION_OPTIONS, FONT_OPTIONS } from "@/pages/editing-planner/constants/clipProperties"
+
+interface TitleSettingsSectionProps {
+  config: TitleConfig
+  onChange: (config: TitleConfig | ((prev: TitleConfig) => TitleConfig)) => void
+}
+
+const TITLE_COLOR_PRESETS = [
+  "#ffffff",
+  "#000000",
+  "#ff4444",
+  "#ffaa00",
+  "#44ff44",
+  "#4488ff",
+  "#ff44ff",
+  "#ffff44",
+]
+
+const TitleSettingsSection: React.FC<TitleSettingsSectionProps> = ({ config, onChange }) => {
+  const update = (partial: Partial<TitleConfig>) => {
+    onChange((prev: TitleConfig) => ({ ...prev, ...partial }))
+  }
+
+  return (
+    <div className="ep-settings-section">
+      <div className="ep-section-title">
+        <span className="ep-section-icon">📝</span>
+        标题设置
+      </div>
+
+      {/* AI 自动选择开关 */}
+      <div className="ep-toggle-row">
+        <span className="ep-toggle-label">AI 自动选择</span>
+        <div
+          className={`ep-toggle ${config.ai_auto_select ? "active" : ""}`}
+          onClick={() => update({ ai_auto_select: !config.ai_auto_select })}
+        >
+          <div className="ep-toggle-knob" />
+        </div>
+      </div>
+
+      {!config.ai_auto_select && (
+        <>
+          {/* 标题文本 */}
+          <div className="ep-field">
+            <label className="ep-field-label">标题文本</label>
+            <input
+              className="ep-form-select"
+              type="text"
+              placeholder="输入标题内容"
+              value={config.content}
+              onChange={(e) => update({ content: e.target.value })}
+            />
+          </div>
+
+          {/* 位置 */}
+          <div className="ep-field">
+            <label className="ep-field-label">位置</label>
+            <select
+              className="ep-form-select"
+              value={config.position}
+              onChange={(e) => update({ position: e.target.value })}
+            >
+              {POSITION_OPTIONS.map((opt) => (
+                <option key={opt.value} value={opt.value}>
+                  {opt.label}
+                </option>
+              ))}
+            </select>
+          </div>
+
+          {/* 字体预设 */}
+          <div className="ep-field">
+            <label className="ep-field-label">字体</label>
+            <select
+              className="ep-form-select"
+              value={config.font_preset}
+              onChange={(e) => update({ font_preset: e.target.value })}
+            >
+              {FONT_OPTIONS.map((f) => (
+                <option key={f} value={f}>
+                  {f}
+                </option>
+              ))}
+            </select>
+          </div>
+
+          {/* 字号滑块 */}
+          <div className="ep-field">
+            <label className="ep-field-label">字号</label>
+            <div className="ep-slider-row">
+              <input
+                className="ep-slider"
+                type="range"
+                min={12}
+                max={72}
+                value={config.font_size}
+                onChange={(e) => update({ font_size: Number(e.target.value) })}
+              />
+              <span className="ep-slider-value">{config.font_size}px</span>
+            </div>
+          </div>
+
+          {/* 颜色 */}
+          <div className="ep-field">
+            <label className="ep-field-label">颜色</label>
+            <div className="ep-color-presets">
+              {TITLE_COLOR_PRESETS.map((color) => (
+                <div
+                  key={color}
+                  className={`ep-color-swatch${config.font_color === color ? " active" : ""}`}
+                  style={{ backgroundColor: color }}
+                  onClick={() => update({ font_color: color })}
+                />
+              ))}
+              <input
+                type="color"
+                className="ep-color-picker"
+                value={config.font_color}
+                onChange={(e) => update({ font_color: e.target.value })}
+              />
+            </div>
+          </div>
+        </>
+      )}
+    </div>
+  )
+}
+
+export default TitleSettingsSection

apps/web/src/pages/editing-planner/hooks/template-management/usePlanLoading.ts

@@ -108,7 +108,10 @@ export function usePlanLoading({
             id: `seg-${idx}`,
             template_segment_id: `seg-${idx}`,
             type: (seg.material_type === "voiceover" ? "voice" : "pip") as ClipType,
-            duration: (seg.duration_min + seg.duration_max) / 2,
+            duration:
+              seg.duration_min != null && seg.duration_max != null
+                ? (seg.duration_min + seg.duration_max) / 2
+                : 5,
             startOffset: 0,
             script_text: "",
             order: seg.segment_order,

apps/web/src/pages/editing-planner/hooks/template-management/useTemplateDetail.ts

@@ -43,7 +43,10 @@ export function useTemplateDetail({
           id: seg.id || `seg-${idx}`,
           template_segment_id: seg.id || `seg-${idx}`,
           type: (seg.material_type === "voiceover" ? "voice" : "pip") as ClipType,
-          duration: (seg.duration_min + seg.duration_max) / 2,
+          duration:
+            seg.duration_min != null && seg.duration_max != null
+              ? (seg.duration_min + seg.duration_max) / 2
+              : 5,
           startOffset: 0,
           script_text: "",
           order: seg.segment_order,

apps/web/src/pages/editing-planner/types/clipProperties.ts

@@ -4,6 +4,7 @@
 import type { ClipData } from "./clip"
 import type { TemplateMode } from "@/api/editing-planner"
 import type { AssetItem } from "@/api/assets"
+import type { TitleConfig } from "@/api/template-editor"
 
 export interface SubtitleSettings {
   enabled: boolean
@@ -28,6 +29,10 @@ export interface BgmSettings {
 }
 
 export interface ClipPropertiesPanelProps {
+  /** 标题配置 — #1789 */
+  titleConfig?: TitleConfig
+  /** 标题配置变更 */
+  onTitleConfigChange?: (config: TitleConfig | ((prev: TitleConfig) => TitleConfig)) => void
   selectedClip: ClipData | null
   subtitleSettings: SubtitleSettings
   bgmSettings: BgmSettings

apps/web/src/pages/editing-planner/utils/timeline.ts

@@ -13,6 +13,8 @@ export const formatTrimTime = (sec: number): string => {
 /** 生成时间标尺刻度 */
 export const generateRulerMarks = (totalDuration: number, step: number): number[] => {
   const marks: number[] = []
+  // #1790: 无片段时不显示时间刻度
+  if (totalDuration <= 0) return marks
   for (let t = 0; t <= totalDuration + step; t += step) {
     marks.push(t)
   }

apps/web/src/pages/generate/GeneratePage.tsx

@@ -27,6 +27,8 @@ import { useStepNavigation } from "./hooks/useStepNavigation"
 import { useGenerateVideo } from "./hooks/useGenerateVideo"
 
 import { usePreviewAssets } from "./hooks/usePreviewAssets"
+import { useBatchVariantPlans } from "./hooks/useBatchVariantPlans"
+import { useVariantVoicePreview } from "./hooks/useVariantVoicePreview"
 import { useTitleStyleUpdaters } from "./hooks/useStep4Title/useTitleStyleUpdaters"
 import { getAssetsByKind } from "@/api/assets"
 import { previewTts } from "@/api/tts"
@@ -43,6 +45,7 @@ const GeneratePage: React.FC = () => {
     selectedTemplate,
     setSelectedTemplate,
     userTemplates,
+    handleInvalidTemplate,
     selectedMaterials,
     setSelectedMaterials,
     materialMode,
@@ -136,14 +139,17 @@ const GeneratePage: React.FC = () => {
   const variant0Title = isBatch ? previewTitles?.[0] || "" : ""
 
   useEffect(() => {
+    // #1750：批量模式每变体独立/共用配音由 useVariantVoicePreview 接管（含独立模式每卡片挂各自 URL），
+    // 本 effect 只服务单视频，批量模式直接跳过（避免共用 TTS 结果错误下发给所有变体）
+    if (isBatch) return
     const voiceAsset = voiceMaterials.find((m) => m.id === selectedVoice)
     if (voiceAsset?.file_url) {
       setPreviewVoiceAudioUrl(voiceAsset.file_url)
       return
     }
 
-    // 批量模式下 TTS 文案跟随变体0标题；单视频跟随主标题
-    const ttsTitle = isBatch ? variant0Title || "" : titleSettings.title
+    // 单视频 TTS 文案跟随主标题
+    const ttsTitle = titleSettings.title
     const voiceId = selectedClonedVoice || selectedVoice
     if (!voiceId || !ttsTitle) {
       setPreviewVoiceAudioUrl(null)
@@ -213,14 +219,56 @@ const GeneratePage: React.FC = () => {
 
   /* ── 加载素材详情（供前端预览播放器使用） ── */
   const previewAssetsEnabled = previewAssetIds.length > 0
-  const { assets: previewAssets, ready: previewAssetsReady } = usePreviewAssets(
-    previewAssetIds,
-    previewAssetsEnabled,
-  )
+  const {
+    assets: previewAssets,
+    ready: previewAssetsReady,
+    ensureAssets,
+  } = usePreviewAssets(previewAssetIds, previewAssetsEnabled)
 
   /* ── 预览就绪：纯前端 Canvas 预览，素材详情加载完即可秒开（单视频/批量一致） ── */
   const previewReady = previewAssetsReady && !!currentTemplate
 
+  /* ── 批量变体真实片段（#1744）：后端独立选片，预览即成片；失败静默降级本地模拟 ──
+     仅批量（N>1）且在第 4 步预览时申请，避免选素材阶段频繁请求；
+     变体 0 沿用草稿 plan（与单视频一致），变体 1..N-1 后端 reselect 独立选片 */
+  const {
+    clipsByVariant: variantClips,
+    planIdsByVariant: variantPlanIds,
+    loading: variantClipsLoading,
+    error: variantClipsError,
+    retry: retryVariantClips,
+  } = useBatchVariantPlans({
+    enabled: isBatch && currentStep === 4 && previewAssetsReady,
+    count: previewCount,
+    templateId: selectedTemplate || "",
+    assetIds: previewAssetIds,
+    sourcePlanId: storedSourceEditPlanId || sourceEditPlanId || "",
+  })
+
+  /* ── 批量变体配音预览 URL（#1750）：独立模式每变体挂各自配音，共用模式全挂同一条；
+     hook 内部自取配音素材库并做 TTS 缓存/串行/防竞态 */
+  const variantVoiceAudioUrls = useVariantVoicePreview({
+    enabled: isBatch,
+    count: previewCount,
+    perVideo: voiceModePerVideo,
+    sharedVoiceId: selectedVoice || "",
+    clonedVoiceId: selectedClonedVoice || "",
+    variantVoiceIds: voiceLibraryIds || [],
+    titles: previewTitles || [],
+  })
+
+  /* ── 变体计划 clips 引用的素材可能不在已选列表中（#1750）：差集补拉素材详情，
+     保证播放器拿得到 file_url，而不是静默丢片段/用假数据冒充 */
+  const clipAssetIds = useMemo(() => {
+    if (!isBatch || !variantClips?.length) return []
+    const ids = new Set<string>()
+    variantClips.forEach((list) => list.forEach((c) => c.asset_id && ids.add(c.asset_id)))
+    return Array.from(ids)
+  }, [isBatch, variantClips])
+  useEffect(() => {
+    if (clipAssetIds.length > 0) void ensureAssets(clipAssetIds)
+  }, [clipAssetIds, ensureAssets])
+
   /* ── 勾选变体 ── */
   const toggleVariantSelect = useCallback(
     (index: number) => {
@@ -262,6 +310,8 @@ const GeneratePage: React.FC = () => {
     autoSubtitles,
     bgm,
     sourceEditPlanId: storedSourceEditPlanId || sourceEditPlanId,
+    // #1744：批量预览阶段后端为每个变体生成的独立 plan id，正式生成回传 → 预览即成片
+    variantPlanIds,
     previewTaskId,
     bgmConfig,
     previewCount,
@@ -367,13 +417,11 @@ const GeneratePage: React.FC = () => {
   /* ── 最终成片（单视频右侧播放） ── */
   const finalVideo = generatedVideos[0]
 
-  /* ── 布局 class：步骤4标题页=预览+标题侧栏；步骤5/6批量=整行宽；步骤1~3=整行宽 ── */
+  /* ── 布局 class：步骤4标题页=预览+标题侧栏两栏；其余步骤（含步骤5确认生成、步骤6封面）=整行宽 ── */
   const layoutClassName = useMemo(() => {
-    if (currentStep < 4) return "xx-generate-layout full-width"
     if (currentStep === 4) return "xx-generate-layout step4-layout"
-    // 步骤5/6：批量网格需要整行宽度；单视频保持 表单+右侧成片 两栏
-    return isBatch ? "xx-generate-layout full-width" : "xx-generate-layout"
-  }, [currentStep, isBatch])
+    return "xx-generate-layout full-width"
+  }, [currentStep])
 
   /* ================================================================
      渲染
@@ -393,7 +441,6 @@ const GeneratePage: React.FC = () => {
               /* 单视频：前端 Canvas 实时预览（与旧版一致，零回归） */
               <FrontendPreviewPlayer
                 assets={previewAssets}
-                template={currentTemplate}
                 videoRatio={videoRatio}
                 ready={previewAssets.length > 0}
                 serverClips={serverClips}
@@ -425,11 +472,14 @@ const GeneratePage: React.FC = () => {
                 <CanvasPreviewGrid
                   count={previewCount}
                   assets={previewAssets}
-                  template={currentTemplate}
                   videoRatio={videoRatio}
                   titles={previewTitles}
                   titleSettings={titleSettings}
-                  voiceAudioUrl={previewVoiceAudioUrl || undefined}
+                  voiceAudioUrls={variantVoiceAudioUrls}
+                  variantClips={variantClips}
+                  clipsLoading={variantClipsLoading}
+                  clipsError={variantClipsError}
+                  onRetryClips={retryVariantClips}
                   selectedIds={selectedVariantIds}
                   onToggleSelect={toggleVariantSelect}
                   selectable={!generating}
@@ -471,6 +521,7 @@ const GeneratePage: React.FC = () => {
             selectedVoice={selectedVoice}
             onSelectedVoiceChange={setSelectedVoice}
             onServerClipsChange={setServerClips}
+            onTemplateInvalid={handleInvalidTemplate}
             generating={generating}
             generated={generated}
             generateError={generateError}
@@ -492,6 +543,59 @@ const GeneratePage: React.FC = () => {
             selectedVariantIds={selectedVariantIds}
           />
 
+          {/* ════ 步骤5（单视频）：成片播放器置于按钮上方、居中展示 ════ */}
+          {currentStep === 5 && !isBatch && generated && finalVideo && (
+            <div
+              style={{
+                display: "flex",
+                justifyContent: "center",
+                marginTop: 16,
+              }}
+            >
+              <div
+                style={{
+                  display: "flex",
+                  flexDirection: "column",
+                  alignItems: "center",
+                  background: "#000",
+                  borderRadius: 12,
+                  padding: 8,
+                  maxWidth: 320,
+                  width: "100%",
+                }}
+              >
+                <video
+                  src={finalVideo.download_url || finalVideo.file_url}
+                  controls
+                  autoPlay
+                  style={{
+                    width: "auto",
+                    maxWidth: "100%",
+                    maxHeight: "70vh",
+                    aspectRatio: "9 / 16",
+                    objectFit: "contain",
+                    borderRadius: 8,
+                  }}
+                  poster={finalVideo.thumbnail_url || undefined}
+                />
+                <div style={{ display: "flex", gap: 8, marginTop: 12, justifyContent: "center" }}>
+                  <button className="xx-btn xx-btn-ghost xx-btn-sm" onClick={handleDownload}>
+                    ⬇️ 下载
+                  </button>
+                  <button className="xx-btn xx-btn-ghost xx-btn-sm" onClick={handleShare}>
+                    🔗 分享
+                  </button>
+                  <button
+                    className="xx-btn xx-btn-ghost xx-btn-sm"
+                    onClick={() => navigate("/app/products")}
+                  >
+                    📁 前往成片库
+                  </button>
+                </div>
+              </div>
+            </div>
+          )}
+
           <GenerateStepActions
             currentStep={currentStep}
             onPrev={goPrev}
@@ -503,35 +607,6 @@ const GeneratePage: React.FC = () => {
             selectedCount={isBatch ? selectedVariantIds.length : 1}
           />
         </div>
-
-        {/* ════ 步骤5/6（单视频）：右侧成片播放器 ════ */}
-        {currentStep >= 5 && !isBatch && generated && finalVideo && (
-          <div className="xx-generate-right-col">
-            <div className="xx-inline-video-player">
-              <video
-                src={finalVideo.download_url || finalVideo.file_url}
-                controls
-                autoPlay={currentStep === 5}
-                style={{ width: "100%", maxHeight: "70vh", objectFit: "contain", borderRadius: 12 }}
-                poster={finalVideo.thumbnail_url || undefined}
-              />
-              <div style={{ display: "flex", gap: 8, marginTop: 12, justifyContent: "center" }}>
-                <button className="xx-btn xx-btn-ghost xx-btn-sm" onClick={handleDownload}>
-                  ⬇️ 下载
-                </button>
-                <button className="xx-btn xx-btn-ghost xx-btn-sm" onClick={handleShare}>
-                  🔗 分享
-                </button>
-                <button
-                  className="xx-btn xx-btn-ghost xx-btn-sm"
-                  onClick={() => navigate("/app/products")}
-                >
-                  📁 前往成片库
-                </button>
-              </div>
-            </div>
-          </div>
-        )}
       </div>
 
       {/* 数量选择弹窗 */}

apps/web/src/pages/generate/components/BatchGenerationGrid.tsx

@@ -34,12 +34,26 @@ const BatchGenerationGrid: React.FC<BatchGenerationGridProps> = ({
           完成 {tasks.filter((t) => t.status === "completed").length} / {tasks.length}
         </span>
       </div>
-      <div className="xx-batch-gen-grid">
+      <div
+        className="xx-batch-gen-grid"
+        style={{
+          display: "grid",
+          gridTemplateColumns: "repeat(auto-fill, minmax(280px, 320px))",
+          justifyContent: "center",
+          justifyItems: "center",
+          gap: 14,
+          width: "100%",
+        }}
+      >
         {sorted.map((task) => {
           const title = titles[task.variantIndex] || `视频 ${task.variantIndex + 1}`
           const video = (task.videos?.[0] || null) as GeneratedVideo | null
           return (
-            <div key={task.taskId} className={`xx-batch-gen-card status-${task.status}`}>
+            <div
+              key={task.taskId}
+              className={`xx-batch-gen-card status-${task.status}`}
+              style={{ maxWidth: 320 }}
+            >
               <div className="xx-batch-gen-card-head">
                 <span className="xx-batch-gen-card-title" title={title}>
                   {task.status === "completed" ? (
@@ -66,12 +80,32 @@ const BatchGenerationGrid: React.FC<BatchGenerationGridProps> = ({
                   </>
                 )}
                 {task.status === "completed" && video && (
-                  <video
-                    src={video.download_url || video.file_url}
-                    controls
-                    style={{ width: "100%", borderRadius: 8, background: "#000", maxHeight: 280 }}
-                    poster={video.thumbnail_url}
-                  />
+                  // 竖屏自适应容器（#1750）：成片固定 1080×1920（9:16），
+                  // 视频按真实宽高比 contain 显示，黑底居中，杜绝横屏播放器左右大黑边
+                  <div
+                    style={{
+                      display: "flex",
+                      justifyContent: "center",
+                      alignItems: "center",
+                      background: "transparent",
+                      borderRadius: 8,
+                      padding: 0,
+                    }}
+                  >
+                    <video
+                      src={video.download_url || video.file_url}
+                      controls
+                      style={{
+                        width: "100%",
+                        maxHeight: "70vh",
+                        aspectRatio: "9 / 16",
+                        objectFit: "cover",
+                        borderRadius: 4,
+                        background: "transparent",
+                      }}
+                      poster={video.thumbnail_url}
+                    />
+                  </div>
                 )}
                 {task.status === "completed" && !video && (
                   <div className="xx-batch-gen-card-done">✅ 已完成（成片可在下一步选择封面）</div>

apps/web/src/pages/generate/components/CanvasPreviewGrid.tsx

@@ -1,27 +1,47 @@
 /**
- * 批量前端 Canvas 实时预览网格（Issue #1677 修正方案）
+ * 批量前端 Canvas 实时预览网格（Issue #1677 起，#1750 对齐基线：只播放后端真实计划）
  *
  * N 个 FrontendPreviewPlayer 网格排列：
- * - 纯前端 Canvas + video 元素实时播放素材片段，不调任何后端渲染接口
- * - variantSeed 让每个变体素材排布/起始点不同，画面有可见差异
- * - 各自叠加独立标题浮层（variantTitle），标题样式全局共用
- * - 勾选框决定提交时生成哪些变体
+ * - 纯前端 Canvas + video 元素实时播放素材片段，不调任何后端渲染接口；
+ * - #1744/#1750：片段只来自后端变体计划接口（POST /generation/variant-plans）的真实
+ *   clips，与正式批量生成同源自 reselect_plan_for_variant，预览即成片；
+ *   接口失败/数据不完整 → 整网格显示错误态+重试（严禁本地假数据冒充预览）；
+ *   加载中 → 9:16 占位防塌陷；
+ * - 各自叠加独立标题浮层（variantTitle），标题样式全局共用；
+ * - 勾选框决定提交时生成哪些变体；
+ * - 每个变体挂载各自配音 URL（独立模式 #1750）或共用同一条；播放互斥：
+ *   点击某卡片播放时其他卡片自动暂停，同一时刻只有一路声音（#1741）。
  */
-import React from "react"
+import React, { useState } from "react"
 import type { AssetItem } from "@/api/assets"
-import type { EditingTemplate } from "@/api/editing-planner"
+import type { EditPlanClip } from "@/api/template-editor"
+import { LoadingOutlined, ReloadOutlined } from "@ant-design/icons"
+import { Button } from "antd"
 import type { TitleSettings } from "../types"
 import FrontendPreviewPlayer from "./FrontendPreviewPlayer"
 
 interface CanvasPreviewGridProps {
   count: number
   assets: AssetItem[]
-  template: EditingTemplate | null
   videoRatio: string
   titles: string[]
   titleSettings: TitleSettings
-  /** 共用配音预览音频（仅第 1 个变体播放，避免多路音频重叠） */
-  voiceAudioUrl?: string
+  /**
+   * 各变体配音预览音频 URL（#1750：独立配音模式每变体一条；共用模式全为同一条；
+   * 元素为 null 表示该变体暂无音频（AI 音色 TTS 合成中））
+   */
+  voiceAudioUrls?: (string | null)[]
+  /**
+   * 各变体的后端真实片段（#1744/#1750）：长度=count。
+   * 仅 clipsLoading=false 且 clipsError=false 时才会传给播放器。
+   */
+  variantClips?: EditPlanClip[][]
+  /** 是否正在向后端申请变体计划 */
+  clipsLoading?: boolean
+  /** 申请变体计划失败（端点未上线/网络错误/数据不完整）：显示错误态，严禁假数据 */
+  clipsError?: boolean
+  /** 用户点击错误态「重试」 */
+  onRetryClips?: () => void
   /** 勾选的变体序号 */
   selectedIds: number[]
   onToggleSelect: (index: number) => void
@@ -32,15 +52,21 @@ interface CanvasPreviewGridProps {
 const CanvasPreviewGrid: React.FC<CanvasPreviewGridProps> = ({
   count,
   assets,
-  template,
   videoRatio,
   titles,
   titleSettings,
-  voiceAudioUrl,
+  voiceAudioUrls,
+  variantClips,
+  clipsLoading = false,
+  clipsError = false,
+  onRetryClips,
   selectedIds,
   onToggleSelect,
   selectable = true,
 }) => {
+  // ── 播放互斥（#1741）：同一时刻只有一个卡片持有播放权（token = 变体序号，0 起，#1750） ──
+  const [activePlayToken, setActivePlayToken] = useState<number | null>(null)
+
   // count 上限已在源头 PreviewCountModal 的数量选择（1~MAX_PREVIEW_COUNT=10）clamp，
   // 这里完整渲染所有变体，保证每个变体都有勾选/预览入口，UI 与数据不脱节
   return (
@@ -64,29 +90,54 @@ const CanvasPreviewGrid: React.FC<CanvasPreviewGridProps> = ({
                 <span>视频 {i + 1}</span>
               </label>
             </div>
-            <FrontendPreviewPlayer
-              assets={assets}
-              template={template}
-              videoRatio={videoRatio}
-              ready={assets.length > 0}
-              variantSeed={i + 1}
-              variantTitle={titles[i] || ""}
-              voiceAudioUrl={i === 0 ? voiceAudioUrl : undefined}
-              compact
-              titleSettings={{
-                title: titles[i] || "",
-                size: titleSettings.size,
-                font: titleSettings.font,
-                color: titleSettings.color,
-                position: titleSettings.position as "top" | "center" | "bottom" | "custom",
-                bold: titleSettings.bold,
-                italic: titleSettings.italic,
-                stroke: titleSettings.stroke,
-                shadow: titleSettings.shadow,
-                posX: titleSettings.posX,
-                posY: titleSettings.posY,
-              }}
-            />
+            {clipsError ? (
+              // ── 错误态（#1750）：9:16 占位防塌陷，不渲染任何播放器（严禁假数据） ──
+              <div className="xx-variant-clips-status" role="alert">
+                <span className="xx-variant-clips-error-text">预览加载失败，请重试</span>
+                {i === 0 && onRetryClips ? (
+                  <Button
+                    size="small"
+                    icon={<ReloadOutlined />}
+                    onClick={onRetryClips}
+                    style={{ marginTop: 12 }}
+                  >
+                    重试
+                  </Button>
+                ) : null}
+              </div>
+            ) : clipsLoading || !variantClips?.[i]?.length ? (
+              // ── 加载态：9:16 占位防塌陷 ──
+              <div className="xx-variant-clips-status" aria-label={`变体${i + 1}片段加载中`}>
+                <LoadingOutlined />
+                <span style={{ marginTop: 8 }}>独立选片中…</span>
+              </div>
+            ) : (
+              <FrontendPreviewPlayer
+                assets={assets}
+                videoRatio={videoRatio}
+                ready={assets.length > 0}
+                playToken={i}
+                serverClips={variantClips[i]}
+                variantTitle={titles[i] || ""}
+                voiceAudioUrl={voiceAudioUrls?.[i] || undefined}
+                activePlayToken={activePlayToken}
+                onPlayTokenChange={setActivePlayToken}
+                compact
+                titleSettings={{
+                  title: titles[i] || "",
+                  size: titleSettings.size,
+                  font: titleSettings.font,
+                  color: titleSettings.color,
+                  position: titleSettings.position as "top" | "center" | "bottom" | "custom",
+                  bold: titleSettings.bold,
+                  italic: titleSettings.italic,
+                  stroke: titleSettings.stroke,
+                  shadow: titleSettings.shadow,
+                  posX: titleSettings.posX,
+                  posY: titleSettings.posY,
+                }}
+              />
+            )}
           </div>
         )
       })}

apps/web/src/pages/generate/components/FrontendPreviewPlayer.tsx

@@ -13,18 +13,19 @@ import {
   PauseCircleOutlined,
   SoundOutlined,
   LoadingOutlined,
+  AudioOutlined,
+  AudioMutedOutlined,
 } from "@ant-design/icons"
 import type { AssetItem } from "@/api/assets"
-import type { EditingTemplate } from "@/api/editing-planner"
 import type { EditPlanClip } from "@/api/template-editor"
 import { useSegmentScheduler, type PlaybackSegment } from "../hooks/useSegmentScheduler"
 import { useCanvasPlayer } from "../hooks/useCanvasPlayer"
 
 interface FrontendPreviewPlayerProps {
   assets: AssetItem[]
-  template: EditingTemplate | null
   videoRatio: string
   ready: boolean
+  /** 服务端变体计划真实片段（#1750：必填，无 fallback；批量网格传入各变体自己的 clips） */
   serverClips?: EditPlanClip[]
   voiceAudioUrl?: string
   titleSettings?: {
@@ -42,15 +43,21 @@ interface FrontendPreviewPlayerProps {
   }
   onTitlePositionChange?: (posX: number, posY: number) => void
   /**
-   * 变体种子（批量生成 #1677）：同一批素材在不同变体中采用不同的素材顺序与
-   * 片段起始点，让 N 个 Canvas 预览画面有差异（纯前端随机剪辑模拟，不调后端）。
-   * 0 / 不传 = 单视频，排布与旧版完全一致（零回归）。
+   * 播放互斥 token（#1750）：批量网格中为变体序号（0 起），单视频不传。
+   * 持有播放权的实例播放，其余自动暂停。
    */
-  variantSeed?: number
+  playToken?: number
   /** 变体标题文字（批量时每个预览独立标题，叠加在画面上）；不传用 titleSettings.title */
   variantTitle?: string
   /** 紧凑模式（批量网格中使用，缩小内边距/标题尺寸） */
   compact?: boolean
+  /**
+   * 批量网格播放互斥（#1741/#1750）：当前持有播放权的实例 token（变体序号）。
+   * 持有权变化且不等于自身时，本实例自动暂停（视频+配音）。单视频模式不传。
+   */
+  activePlayToken?: number | null
+  /** 播放权变化回调：本实例请求播放时传自身 playToken，暂停时传 null */
+  onPlayTokenChange?: (token: number | null) => void
 }
 
 function formatTime(seconds: number): string {
@@ -60,114 +67,107 @@ function formatTime(seconds: number): string {
 }
 
 /**
- * 将素材映射为播放片段（复用原逻辑）
+ * 将后端变体计划 clips 映射为播放片段（#1750：唯一数据来源，无本地模拟 fallback）
+ *
+ * 预览不渲染：浏览器按后端真实计划即时播放素材原片，预览即成片。
+ * 模板片段数固定、成片时长=配音时长（后端等比分配），前端不再有任何时长假设。
  */
-/** 简单可复现随机数（mulberry32），同一种子产出稳定排布，避免每次渲染抖动 */
-function seededRandom(seed: number): () => number {
-  let a = seed >>> 0
-  return () => {
-    a |= 0
-    a = (a + 0x6d2b79f5) | 0
-    let t = Math.imul(a ^ (a >>> 15), 1 | a)
-    t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t
-    return ((t ^ (t >>> 14)) >>> 0) / 4294967296
-  }
-}
-
 function buildPlaybackSegments(
   assets: AssetItem[],
-  template: EditingTemplate | null,
   serverClips?: EditPlanClip[],
-  variantSeed = 0,
+  /** #1754 前端兜底：配音时长≠clips 总时长时，按比例缩放每段播放时长并调速 */
+  speedFactor = 1,
 ): PlaybackSegment[] {
-  if (!assets.length) return []
+  if (!assets.length || !serverClips || serverClips.length === 0) return []
 
-  // Build asset lookup map
   const assetMap = new Map(assets.map((a) => [a.id, a]))
-
-  // 优先使用服务端 clips（含随机 start_time 和正确数量），与最终生成结果一致
-  if (serverClips && serverClips.length > 0) {
-    const segments: PlaybackSegment[] = []
-    for (const clip of serverClips) {
-      const asset = assetMap.get(clip.asset_id)
-      if (!asset) continue
-      const assetDuration = asset.duration || asset.metadata?.duration || 30
-      const startTime = clip.start_time || 0
-      const endTime = Math.min(startTime + (clip.duration || assetDuration), assetDuration)
-      const videoUrl = asset.file_url || asset.storage_key
-      segments.push({ assetId: asset.id, videoUrl, startTime, endTime, order: clip.order })
-    }
-    if (segments.length > 0) {
-      return segments.sort((a, b) => a.order - b.order)
-    }
-  }
-
-  // Fallback: 本地构建片段
-  // variantSeed=0（单视频）：与旧行为完全一致（素材原序、起始点 0），零回归
-  // variantSeed>0（批量变体）：素材顺序按种子轮换 + 片段起始点在素材内偏移，
-  //   模拟后端"AI 随机剪辑出不同版本"，让 N 个预览画面有可见差异
-  const templateSegments = template?.segments || []
   const segments: PlaybackSegment[] = []
-  const orderedAssets = variantSeed > 0 ? [...assets] : assets
-  if (variantSeed > 0 && orderedAssets.length > 1) {
-    const rand = seededRandom(variantSeed * 7919 + 13)
-    // 素材轮换：把数组旋转 (seed % n) 位，再对后半段做一次稳定交换
-    const n = orderedAssets.length
-    const rotate = variantSeed % n
-    orderedAssets.push(...orderedAssets.splice(0, rotate))
-    const swapA = Math.floor(rand() * n)
-    const swapB = Math.floor(rand() * n)
-    if (swapA !== swapB) {
-      ;[orderedAssets[swapA], orderedAssets[swapB]] = [orderedAssets[swapB], orderedAssets[swapA]]
-    }
-  }
-
-  orderedAssets.forEach((asset, i) => {
-    const assetDuration = asset.duration || asset.metadata?.duration || 30
-    const tplSeg = templateSegments[i] || templateSegments[templateSegments.length - 1]
-    const segDuration = tplSeg
-      ? Math.min(tplSeg.duration_max, Math.max(tplSeg.duration_min, assetDuration))
-      : Math.min(assetDuration, 10)
-
-    let startTime = 0
-    if (variantSeed > 0 && assetDuration - segDuration > 1) {
-      const rand = seededRandom(variantSeed * 104729 + i * 31 + 7)
-      // 起始点在素材可用区间内随机偏移（至少留 0.5s 余量）
-      const maxStart = Math.max(0, assetDuration - segDuration - 0.5)
-      startTime = Math.round(rand() * maxStart * 10) / 10
-    }
-    const endTime = Math.min(startTime + segDuration, assetDuration)
+  // speedFactor > 1 表示 clips 偏短需加速；< 1 表示 clips 偏长需减速
+  const invSpeed = speedFactor > 0 && Math.abs(speedFactor - 1) > 0.01 ? 1 / speedFactor : 1
+  for (const clip of serverClips) {
+    const asset = assetMap.get(clip.asset_id)
+    if (!asset) continue
+    const assetDuration = asset.duration || asset.metadata?.duration || 0
+    const startTime = clip.start_time || 0
+    // 片段时长以后端计划为准（配音时长等比分配）；素材时长仅用于兜底钳制边界
+    const rawClipDuration = clip.duration || 0
+    // #1754：按 speedFactor 缩放片段时长，使总时长匹配配音
+    const clipDuration = invSpeed !== 1 ? rawClipDuration * invSpeed : rawClipDuration
+    const endTime =
+      assetDuration > 0
+        ? Math.min(startTime + clipDuration, assetDuration)
+        : startTime + clipDuration
     const videoUrl = asset.file_url || asset.storage_key
-
-    segments.push({ assetId: asset.id, videoUrl, startTime, endTime, order: i })
-  })
-
-  return segments
+    segments.push({
+      assetId: asset.id,
+      videoUrl,
+      startTime,
+      endTime,
+      order: clip.order,
+      playbackRate: invSpeed !== 1 ? speedFactor : undefined,
+    })
+  }
+  return segments.sort((a, b) => a.order - b.order)
 }
 
 const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
   assets,
-  template,
   videoRatio,
   ready,
   serverClips,
   voiceAudioUrl,
   titleSettings,
   onTitlePositionChange,
-  variantSeed = 0,
+  playToken,
   variantTitle,
   compact = false,
+  activePlayToken = null,
+  onPlayTokenChange,
 }) => {
+  // #1754：测量配音时长，计算缩放因子
+  const [voiceDuration, setVoiceDuration] = useState(0)
+  useEffect(() => {
+    if (!voiceAudioUrl) {
+      setVoiceDuration(0)
+      return
+    }
+    const audio = new Audio()
+    audio.preload = "metadata"
+    const onLoaded = () => {
+      if (audio.duration && isFinite(audio.duration)) {
+        setVoiceDuration(audio.duration)
+      }
+    }
+    audio.addEventListener("loadedmetadata", onLoaded)
+    audio.src = voiceAudioUrl
+    return () => {
+      audio.removeEventListener("loadedmetadata", onLoaded)
+    }
+  }, [voiceAudioUrl])
+
+  // #1756：clips 原始总时长 + 转场时长（后端等比分配配音时包含转场占位）
+  const rawClipsDuration = useMemo(() => {
+    if (!serverClips?.length) return 0
+    return serverClips.reduce((sum, c) => sum + (c.duration || 0) + (c.transition_duration || 0), 0)
+  }, [serverClips])
+
+  // #1754→#1756：配音时长可用且与 clips+转场 总时长偏差 > 5% 时，按比例调速
+  const speedFactor = useMemo(() => {
+    if (!voiceDuration || voiceDuration <= 0 || rawClipsDuration <= 0) return 1
+    const ratio = rawClipsDuration / voiceDuration
+    return Math.abs(ratio - 1) > 0.05 ? ratio : 1
+  }, [voiceDuration, rawClipsDuration])
+
   const segments = useMemo(
-    () => buildPlaybackSegments(assets, template, serverClips, variantSeed),
-    [assets, template, serverClips, variantSeed],
+    () => buildPlaybackSegments(assets, serverClips, speedFactor),
+    [assets, serverClips, speedFactor],
   )
   // 批量变体：标题文字取 variantTitle，样式仍由全局 titleSettings 控制
   const effectiveTitle = variantTitle ?? titleSettings?.title
 
   // ── ASS 坐标系参数（与后端 ass_subtitle_builder.py 一致） ──
-  const TITLE_MARGIN_TOP = 120
-  const TITLE_MARGIN_BOTTOM = 60
+  const TITLE_MARGIN_TOP = 180
+  const TITLE_MARGIN_BOTTOM = 100
   const TITLE_MARGIN_SIDE = 40
   const playRes = (() => {
     switch (videoRatio) {
@@ -339,6 +339,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
     canPlay: videoCanPlay,
     togglePlayPause: videoTogglePlayPause,
     seekTo: videoSeekTo,
+    pause: videoPause,
     videoRefs,
   } = useSegmentScheduler(segments)
 
@@ -353,6 +354,10 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
   // ── 配音音频同步 ──
   const audioRef = useRef<HTMLAudioElement | null>(null)
   const prevIsPlayingRef = useRef(false)
+  // 本卡片静音开关（#1741）：默认有声，用户可点喇叭单独静音某张卡片
+  const [muted, setMuted] = useState(false)
+  // 有配音时 video 素材保持静音（避免原声与配音混音）；无配音时取消静音，素材原声兜底
+  const hasVoice = !!voiceAudioUrl
 
   useEffect(() => {
     if (!voiceAudioUrl) {
@@ -370,7 +375,8 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
     if (audioRef.current.src !== voiceAudioUrl) {
       audioRef.current.src = voiceAudioUrl
     }
-  }, [voiceAudioUrl])
+    audioRef.current.muted = muted
+  }, [voiceAudioUrl, muted])
 
   useEffect(() => {
     const audio = audioRef.current
@@ -409,17 +415,42 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
     [effectiveUseWebCodecs, canvasControls, videoSeekTo],
   )
 
+  // ── 批量网格播放互斥（#1741）：播放权属于其他实例时，本实例自动暂停（视频+配音） ──
+  useEffect(() => {
+    if (activePlayToken == null || playToken == null || activePlayToken === playToken) return
+    if (effectiveUseWebCodecs) {
+      if (canvasState.isPlaying) canvasControls.pause()
+    } else if (isPlaying) {
+      videoPause()
+    }
+    // isPlaying/canvasState.isPlaying 不放依赖：只在 token 变化时执行一次暂停，
+    // token 等于自身时本实例的播放在 handleTogglePlay 里处理
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [activePlayToken, playToken, effectiveUseWebCodecs])
+
   const handleTogglePlay = useCallback(() => {
     if (effectiveUseWebCodecs) {
       if (canvasState.isPlaying) {
         canvasControls.pause()
+        onPlayTokenChange?.(null)
       } else {
+        if (playToken != null) onPlayTokenChange?.(playToken)
         canvasControls.play()
       }
     } else {
+      // video fallback：先上报播放权（暂停其他卡片），再切换本卡片播放/暂停
+      if (playToken != null) onPlayTokenChange?.(isPlaying ? null : playToken)
       videoTogglePlayPause()
     }
-  }, [effectiveUseWebCodecs, canvasState.isPlaying, canvasControls, videoTogglePlayPause])
+  }, [
+    effectiveUseWebCodecs,
+    canvasState.isPlaying,
+    canvasControls,
+    videoTogglePlayPause,
+    isPlaying,
+    playToken,
+    onPlayTokenChange,
+  ])
 
   // ── 进度条拖拽 ──
   const [isDragging, setIsDragging] = useState(false)
@@ -573,7 +604,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
         maxWidth: compact ? "100%" : 280,
         margin: compact ? 0 : "0 auto",
         aspectRatio: "9 / 16",
-        background: "#0a0a0a",
+        background: compact ? "transparent" : "#0a0a0a",
         borderRadius: compact ? 10 : 24,
         overflow: "hidden",
         boxShadow: compact
@@ -597,7 +628,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
             style={{
               width: "100%",
               height: "100%",
-              objectFit: "contain",
+              objectFit: "cover",
             }}
           />
         </div>
@@ -608,7 +639,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
         segments.map((seg, i) => (
           <video
             key={seg.assetId}
-            muted
+            muted={hasVoice || muted}
             ref={(el) => {
               videoRefs.current[i] = el
             }}
@@ -619,7 +650,7 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
               inset: 0,
               width: "100%",
               height: "100%",
-              objectFit: "contain",
+              objectFit: "cover",
               background: "#000",
               zIndex: 1,
               opacity: i === videoCurrentSegIdx ? 1 : 0,
@@ -662,8 +693,8 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
                         ? { top: "50%", transform: "translate(-50%, -50%)" }
                         : { bottom: `${titleBottomPct}%` }),
                   }),
-              pointerEvents: onTitlePositionChange && variantSeed === 0 ? "auto" : "none",
-              cursor: onTitlePositionChange && variantSeed === 0 ? "grab" : "default",
+              pointerEvents: onTitlePositionChange && playToken == null ? "auto" : "none",
+              cursor: onTitlePositionChange && playToken == null ? "grab" : "default",
               touchAction: "none",
               userSelect: "none",
               WebkitUserSelect: "none",
@@ -743,6 +774,45 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
         </button>
       )}
 
+      {/* 静音/有声切换（#1741）：左上角，默认有声；批量与单视频均可单独静音 */}
+      {segments.length > 0 && (
+        <button
+          type="button"
+          aria-label={muted ? "取消静音" : "静音"}
+          title={muted ? "取消静音" : "静音"}
+          onClick={() => setMuted((m) => !m)}
+          style={{
+            position: "absolute",
+            top: 8,
+            left: 8,
+            width: compact ? 26 : 30,
+            height: compact ? 26 : 30,
+            display: "flex",
+            alignItems: "center",
+            justifyContent: "center",
+            background: "rgba(0,0,0,0.45)",
+            backdropFilter: "blur(8px)",
+            WebkitBackdropFilter: "blur(8px)",
+            border: "1px solid rgba(255,255,255,0.1)",
+            borderRadius: "50%",
+            color: muted ? "rgba(255,255,255,0.45)" : "rgba(255,255,255,0.92)",
+            fontSize: compact ? 13 : 15,
+            cursor: "pointer",
+            zIndex: 10,
+            padding: 0,
+            transition: "background 0.15s, color 0.15s",
+          }}
+          onMouseEnter={(e) => {
+            e.currentTarget.style.background = "rgba(0,0,0,0.65)"
+          }}
+          onMouseLeave={(e) => {
+            e.currentTarget.style.background = "rgba(0,0,0,0.45)"
+          }}
+        >
+          {muted ? <AudioMutedOutlined /> : <AudioOutlined />}
+        </button>
+      )}
+
       {/* 片段指示器 — 右上角胶囊 */}
       <div
         style={{
@@ -753,9 +823,9 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
           backdropFilter: "blur(8px)",
           WebkitBackdropFilter: "blur(8px)",
           color: "rgba(255,255,255,0.9)",
-          fontSize: 10,
+          fontSize: compact ? 9 : 10,
           fontWeight: 500,
-          padding: "2px 8px",
+          padding: compact ? "1px 6px" : "2px 8px",
           borderRadius: 999,
           zIndex: 10,
           border: "1px solid rgba(255,255,255,0.1)",
@@ -774,8 +844,8 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
           right: 0,
           display: "flex",
           alignItems: "center",
-          gap: 10,
-          padding: "12px 16px 16px",
+          gap: compact ? 6 : 10,
+          padding: compact ? "8px 10px 10px" : "12px 16px 16px",
           background: "linear-gradient(transparent, rgba(0,0,0,0.7))",
           backdropFilter: "blur(4px)",
           WebkitBackdropFilter: "blur(4px)",
@@ -788,10 +858,10 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
             background: "rgba(255,255,255,0.15)",
             border: "none",
             color: "#fff",
-            fontSize: 16,
+            fontSize: compact ? 14 : 16,
             cursor: "pointer",
-            width: 32,
-            height: 32,
+            width: compact ? 26 : 32,
+            height: compact ? 26 : 32,
             borderRadius: "50%",
             display: "flex",
             alignItems: "center",
@@ -811,9 +881,9 @@ const FrontendPreviewPlayer: React.FC<FrontendPreviewPlayerProps> = ({
 
         <span
           style={{
-            fontSize: 11,
+            fontSize: compact ? 10 : 11,
             color: "rgba(255,255,255,0.85)",
-            minWidth: 72,
+            minWidth: compact ? 58 : 72,
             fontVariantNumeric: "tabular-nums",
             letterSpacing: 0.2,
           }}

apps/web/src/pages/generate/components/GenerateResultPanel.tsx

@@ -1,96 +0,0 @@
-import React from "react"
-import { Typography } from "antd"
-import { PlayCircleOutlined, CloseCircleOutlined } from "@ant-design/icons"
-import type { GeneratedVideo } from "@/api/template-editor"
-import { ProgressIndicator } from "./result-panel/ProgressIndicator"
-import { ResultVideoCard } from "./result-panel/ResultVideoCard"
-
-const { Text } = Typography
-
-interface GenerateResultPanelProps {
-  generated: boolean
-  generating: boolean
-  progress: number
-  generateError: string | null
-  generatedVideos: GeneratedVideo[]
-  onVideoPreview: (video: GeneratedVideo) => void
-  onDownload: () => void
-  onShare: () => void
-  onGoToLibrary: () => void
-}
-
-const GenerateResultPanel: React.FC<GenerateResultPanelProps> = ({
-  generated,
-  generating,
-  progress,
-  generateError,
-  generatedVideos,
-  onVideoPreview,
-  onDownload,
-  onShare,
-  onGoToLibrary,
-}) => {
-  return (
-    <div className="xx-generate-result">
-      <div className="xx-result-header">
-        <h3>生成结果</h3>
-        {generated && generatedVideos.length > 0 && (
-          <span className="xx-result-count">{generatedVideos.length} 个视频</span>
-        )}
-      </div>
-
-      {generating && <ProgressIndicator progress={progress} />}
-
-      {generateError && !generating && (
-        <div className="xx-result-empty">
-          <CloseCircleOutlined style={{ fontSize: 40, color: "#ff4d4f", marginBottom: 12 }} />
-          <Text strong style={{ display: "block", marginBottom: 4 }}>
-            生成失败
-          </Text>
-          <Text style={{ fontSize: 12, color: "var(--text-secondary)" }}>
-            {typeof generateError === "string" ? generateError : "请重试"}
-          </Text>
-        </div>
-      )}
-
-      {!generated && !generating && !generateError && (
-        <div className="xx-result-empty">
-          <PlayCircleOutlined
-            style={{ fontSize: 48, color: "var(--text-tertiary)", marginBottom: 12 }}
-          />
-          <Text style={{ color: "var(--text-secondary)", fontSize: 13 }}>
-            完成配置后点击「确认生成」
-          </Text>
-          <Text style={{ color: "var(--text-tertiary)", fontSize: 12, marginTop: 4 }}>
-            生成的视频将在这里展示
-          </Text>
-        </div>
-      )}
-
-      {generated && generatedVideos.length > 0 && (
-        <div className="xx-video-grid">
-          {generatedVideos.map((video, idx) => (
-            <ResultVideoCard
-              key={video.id || idx}
-              video={video}
-              index={idx}
-              onPreview={onVideoPreview}
-              onDownload={onDownload}
-              onShare={onShare}
-            />
-          ))}
-        </div>
-      )}
-
-      {generated && (
-        <div className="xx-result-footer">
-          <button className="xx-btn xx-btn-ghost xx-btn-block" onClick={onGoToLibrary}>
-            前往成片库 →
-          </button>
-        </div>
-      )}
-    </div>
-  )
-}
-
-export default GenerateResultPanel

apps/web/src/pages/generate/components/GenerateStepContent.tsx

@@ -50,6 +50,8 @@ export interface GenerateStepContentProps {
   selectedVoice: string
   onSelectedVoiceChange: (id: string) => void
   onServerClipsChange: (clips: EditPlanClip[]) => void
+  /** 当前模板创建片段被判失效（404/400/422）时的自动回退回调（#1777） */
+  onTemplateInvalid?: () => boolean
   /* 生成 */
   generating: boolean
   generated: boolean
@@ -108,6 +110,7 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
     selectedVoice,
     onSelectedVoiceChange,
     onServerClipsChange,
+    onTemplateInvalid,
     generating,
     generated,
     generateError,
@@ -153,6 +156,7 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
           selectedTemplate={selectedTemplate}
           templateSegments={templateSegments}
           onServerClipsChange={onServerClipsChange}
+          onTemplateInvalid={onTemplateInvalid}
         />
       )
     case 3:
@@ -189,7 +193,7 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
         />
       )
     case 5:
-      /* 确认生成页：批量=逐任务进度网格；单视频=进度状态卡（成片播放器在左侧大区域） */
+      /* 确认生成页：批量=逐任务进度网格；单视频=仅渲染进度/失败状态（完成后只显示成片播放器，播放器在按钮上方） */
       if (previewCount > 1) {
         return (
           <BatchGenerationGrid
@@ -199,10 +203,10 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
           />
         )
       }
-      /* 单视频：渲染进度 / 失败重试 / 完成提示（成片播放器在右侧栏） */
+      /* 单视频：生成中显示进度卡、失败显示重试卡；生成完成后不再渲染提示卡，页面只保留成片播放器+操作按钮 */
+      if (generated && !generating && !generateError) return null
       return (
         <div className="xx-form-section">
-          <h3>🎬 确认生成</h3>
           {generating && (
             <div className="xx-gen-progress-card">
               <div className="xx-gen-progress-header">
@@ -234,14 +238,6 @@ export const GenerateStepContent: React.FC<GenerateStepContentProps> = (props) =
               </button>
             </div>
           )}
-          {generated && !generating && (
-            <div className="xx-gen-success-card">
-              <div className="xx-gen-success-info">
-                <div className="xx-gen-success-title">✅ 视频生成完成！</div>
-                <div className="xx-gen-success-sub">右侧可预览成片，点击「下一步」选择封面</div>
-              </div>
-            </div>
-          )}
         </div>
       )
     case 6:

apps/web/src/pages/generate/components/PreviewVideoPanel.tsx

@@ -1,380 +0,0 @@
-/**
- * 右侧预览视频面板 — 服务器渲染预览架构
- *
- * Step4+: 显示预览面板
- * Step5: 播放服务器渲染的真实视频（POST /generation/preview）
- *
- * 架构：
- * - 进入 Step4/5 时自动创建服务器预览渲染任务
- * - 轮询完成后用 <video> 标签播放返回的 video_url
- * - 标题样式编辑时 CSS TitleOverlay 实时叠加预览
- * - 素材/配音/BGM 变更自动重新渲染
- * - 标题文字/样式变更标记 stale，保留旧视频 + 显示"重新预览"按钮
- *
- * 点"确认生成"时走 confirm 路径，成品就是预览视频本身，100% 一致。
- */
-import React, { useMemo, useRef, useState, useEffect } from "react"
-import { LoadingOutlined, ReloadOutlined, ExclamationCircleOutlined } from "@ant-design/icons"
-import { Button } from "antd"
-import type { TitleSettings } from "../types"
-import { getFontFamily } from "../constants"
-import type { ServerPreviewStatus } from "../hooks/useServerPreview"
-
-interface PreviewVideoPanelProps {
-  /** 服务器预览状态 */
-  previewStatus: ServerPreviewStatus
-  /** 服务器渲染视频 URL */
-  videoUrl: string | null
-  /** 渲染进度 0-100 */
-  progress: number
-  /** 错误信息 */
-  error: string | null
-  /** 重新预览回调 */
-  onRetry: () => void
-  /** 视频比例 */
-  videoRatio: string
-  /** 标题设置 — CSS 实时预览层 */
-  titleSettings?: TitleSettings
-  /** 素材数量 */
-  assetCount?: number
-}
-
-/* ── ASS 坐标系参数（与后端 ass_subtitle_builder.py 一致） ── */
-const TITLE_MARGIN_TOP = 120
-const TITLE_MARGIN_BOTTOM = 60
-const TITLE_MARGIN_SIDE = 40
-
-/** 根据视频比例返回后端实际渲染分辨率（PlayResX × PlayResY） */
-function getResolution(ratio: string): { width: number; height: number } {
-  switch (ratio) {
-    case "16:9":
-      return { width: 1920, height: 1080 }
-    case "1:1":
-      return { width: 1080, height: 1080 }
-    case "9:16":
-    default:
-      return { width: 1080, height: 1920 }
-  }
-}
-
-function getPositionStyle(
-  position: string,
-  playResX: number,
-  playResY: number,
-): React.CSSProperties {
-  const sidePercent = (TITLE_MARGIN_SIDE / playResX) * 100
-  switch (position) {
-    case "bottom":
-      return {
-        bottom: `${(TITLE_MARGIN_BOTTOM / playResY) * 100}%`,
-        left: `${sidePercent}%`,
-        right: `${sidePercent}%`,
-        textAlign: "center",
-      }
-    case "center":
-      return {
-        top: "50%",
-        transform: "translateY(-50%)",
-        left: `${sidePercent}%`,
-        right: `${sidePercent}%`,
-        textAlign: "center",
-      }
-    case "top":
-    default:
-      return {
-        top: `${(TITLE_MARGIN_TOP / playResY) * 100}%`,
-        left: `${sidePercent}%`,
-        right: `${sidePercent}%`,
-        textAlign: "center",
-      }
-  }
-}
-
-function buildTitleStyle(
-  settings: TitleSettings,
-  containerHeight: number,
-  playResY: number,
-): React.CSSProperties {
-  // 字号按容器高度与 PlayResY 的比例缩放，不设上限（与后端一致）
-  const fontSizePx =
-    containerHeight > 0
-      ? (settings.size / playResY) * containerHeight
-      : (settings.size / playResY) * 400
-
-  const base: React.CSSProperties = {
-    fontFamily: getFontFamily(settings.font),
-    fontSize: `${fontSizePx}px`,
-    color: settings.color || "#ffffff",
-    fontWeight: settings.bold ? 700 : 400,
-    fontStyle: settings.italic ? "italic" : "normal",
-    lineHeight: 1.05,
-    wordBreak: "break-word",
-    pointerEvents: "none",
-    userSelect: "none",
-  }
-  if (settings.stroke) base.WebkitTextStroke = "1px #000000"
-  if (settings.shadow) base.textShadow = "2px 2px 4px rgba(0,0,0,0.8)"
-  return base
-}
-
-/** CSS 标题实时预览覆盖层 */
-const TitleOverlay: React.FC<{ titleSettings: TitleSettings; videoRatio: string }> = ({
-  titleSettings,
-  videoRatio,
-}) => {
-  const containerRef = useRef<HTMLDivElement>(null)
-  const [containerHeight, setContainerHeight] = useState(400)
-
-  useEffect(() => {
-    const el = containerRef.current
-    if (!el) return
-    const ro = new ResizeObserver((entries) => {
-      for (const entry of entries) {
-        const h = entry.contentRect.height
-        if (h > 0) setContainerHeight(h)
-      }
-    })
-    ro.observe(el)
-    const rect = el.getBoundingClientRect()
-    if (rect.height > 0) setContainerHeight(rect.height)
-    return () => ro.disconnect()
-  }, [])
-
-  const { width: playResX, height: playResY } = getResolution(videoRatio)
-
-  const positionStyle = useMemo(
-    () => getPositionStyle(titleSettings.position, playResX, playResY),
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-    [titleSettings.position, playResX, playResY],
-  )
-  const titleStyle = useMemo(
-    () => buildTitleStyle(titleSettings, containerHeight, playResY),
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-    [
-      containerHeight,
-      titleSettings.font,
-      titleSettings.size,
-      titleSettings.color,
-      titleSettings.bold,
-      titleSettings.italic,
-      titleSettings.stroke,
-      titleSettings.shadow,
-      playResY,
-    ],
-  )
-
-  const displayTitle = titleSettings.title?.trim() || "标题预览"
-
-  return (
-    <div
-      ref={containerRef}
-      style={{
-        position: "absolute",
-        inset: 0,
-        zIndex: 20,
-        pointerEvents: "none",
-        overflow: "hidden",
-      }}
-    >
-      <div style={{ ...positionStyle, ...titleStyle, position: "absolute" }}>
-        {displayTitle.split(/[/／]/).map((part, i) => (
-          <span key={i}>
-            {i > 0 && <br />}
-            {part}
-          </span>
-        ))}
-      </div>
-    </div>
-  )
-}
-
-/* ── 主组件 ── */
-
-export const PreviewVideoPanel: React.FC<PreviewVideoPanelProps> = ({
-  previewStatus,
-  videoUrl,
-  progress,
-  error,
-  onRetry,
-  videoRatio,
-  titleSettings,
-  assetCount,
-}) => {
-  const videoAspectStyle = { aspectRatio: (videoRatio || "9:16").replace(":", "/") }
-  const isLoading = previewStatus === "loading"
-  const isReady = previewStatus === "ready" || previewStatus === "stale"
-  const isFailed = previewStatus === "failed"
-  const isIdle = previewStatus === "idle"
-  const isStale = previewStatus === "stale"
-
-  return (
-    <div className="xx-generate-preview">
-      <div className="xx-preview-header">
-        <h3>预览视频</h3>
-        {isReady && !isStale && <span className="xx-preview-badge">服务器渲染</span>}
-        {isStale && (
-          <span
-            style={{
-              fontSize: 12,
-              color: "#faad14",
-              display: "flex",
-              alignItems: "center",
-              gap: 4,
-            }}
-          >
-            <ExclamationCircleOutlined /> 配置已变更
-          </span>
-        )}
-        {isLoading && <span className="xx-preview-badge">渲染中</span>}
-      </div>
-
-      <div className="xx-preview-video" style={{ ...videoAspectStyle, position: "relative" }}>
-        {/* 加载中 */}
-        {isLoading && (
-          <div
-            style={{
-              position: "absolute",
-              inset: 0,
-              display: "flex",
-              flexDirection: "column",
-              alignItems: "center",
-              justifyContent: "center",
-              zIndex: 5,
-              background: "rgba(0,0,0,0.6)",
-            }}
-          >
-            <LoadingOutlined style={{ fontSize: 36, color: "#fff" }} spin />
-            <p style={{ marginTop: 12, color: "rgba(255,255,255,0.9)", fontSize: 14 }}>
-              正在渲染预览视频{progress > 0 ? `...${progress}%` : "..."}
-            </p>
-            <p style={{ marginTop: 4, color: "rgba(255,255,255,0.5)", fontSize: 12 }}>
-              首次渲染约需 30-60 秒
-            </p>
-          </div>
-        )}
-
-        {/* 空闲状态（尚未触发预览） */}
-        {isIdle && (
-          <div
-            style={{
-              position: "absolute",
-              inset: 0,
-              display: "flex",
-              flexDirection: "column",
-              alignItems: "center",
-              justifyContent: "center",
-              background: "rgba(0,0,0,0.3)",
-              zIndex: 5,
-            }}
-          >
-            <p style={{ color: "rgba(255,255,255,0.7)", fontSize: 14 }}>等待素材选择...</p>
-          </div>
-        )}
-
-        {/* 服务器渲染的真实视频 */}
-        {isReady && videoUrl && (
-          <video
-            key={videoUrl}
-            src={videoUrl}
-            controls
-            autoPlay
-            loop
-            playsInline
-            style={{
-              width: "100%",
-              height: "100%",
-              objectFit: "contain",
-              position: "absolute",
-              inset: 0,
-              zIndex: 1,
-            }}
-          />
-        )}
-
-        {/* 标题样式实时预览层（仅在有视频时叠加） */}
-        {isReady && titleSettings && (
-          <TitleOverlay titleSettings={titleSettings} videoRatio={videoRatio} />
-        )}
-
-        {/* stale 遮罩：配置变更提示 */}
-        {isStale && (
-          <div
-            style={{
-              position: "absolute",
-              bottom: 0,
-              left: 0,
-              right: 0,
-              padding: "10px 16px",
-              background: "linear-gradient(transparent, rgba(0,0,0,0.85))",
-              display: "flex",
-              alignItems: "center",
-              justifyContent: "space-between",
-              gap: 8,
-              zIndex: 30,
-            }}
-          >
-            <span style={{ color: "rgba(255,255,255,0.9)", fontSize: 12 }}>
-              配置已变更，预览内容可能不是最新
-            </span>
-            <Button size="small" type="primary" icon={<ReloadOutlined />} onClick={onRetry}>
-              重新预览
-            </Button>
-          </div>
-        )}
-
-        {/* 错误状态 */}
-        {isFailed && (
-          <div
-            style={{
-              position: "absolute",
-              inset: 0,
-              display: "flex",
-              flexDirection: "column",
-              alignItems: "center",
-              justifyContent: "center",
-              background: "rgba(0,0,0,0.7)",
-              zIndex: 10,
-              padding: 24,
-            }}
-          >
-            <ExclamationCircleOutlined style={{ fontSize: 40, color: "#ff4d4f" }} />
-            <p
-              style={{
-                marginTop: 12,
-                color: "rgba(255,255,255,0.9)",
-                fontSize: 14,
-                textAlign: "center",
-              }}
-            >
-              {error || "预览渲染失败"}
-            </p>
-            <Button
-              type="primary"
-              icon={<ReloadOutlined />}
-              onClick={onRetry}
-              style={{ marginTop: 12 }}
-            >
-              重新预览
-            </Button>
-          </div>
-        )}
-      </div>
-
-      {/* 素材信息 */}
-      {assetCount !== undefined && assetCount > 0 && (
-        <div className="xx-preview-info">
-          <div className="xx-preview-info-row">
-            <span>素材数</span>
-            <span>{assetCount} 个</span>
-          </div>
-          <div className="xx-preview-info-row">
-            <span>比例</span>
-            <span>{videoRatio}</span>
-          </div>
-        </div>
-      )}
-    </div>
-  )
-}
-
-export default PreviewVideoPanel

apps/web/src/pages/generate/components/Step2MaterialSelect.tsx

@@ -23,6 +23,8 @@ interface Step2MaterialSelectProps {
   templateSegments?: TemplateSegment[]
   /** 服务端 clips 创建成功后的回调 */
   onServerClipsChange?: (clips: EditPlanClip[]) => void
+  /** 当前模板创建片段返回 404/400/422（模板失效）时的自动回退回调（#1777） */
+  onTemplateInvalid?: () => boolean
 }
 
 const Step2MaterialSelect: React.FC<Step2MaterialSelectProps> = (props) => {
@@ -36,16 +38,25 @@ const Step2MaterialSelect: React.FC<Step2MaterialSelectProps> = (props) => {
 
       <div className="xx-form-field" style={{ marginTop: 12 }}>
         <label>选择视频库</label>
-        <select
-          value={m.selectedLibraryId}
-          onChange={(e) => m.setSelectedLibraryId(e.target.value)}
-        >
-          {m.libraries.map((lib) => (
-            <option key={lib.id} value={lib.id}>
-              {lib.name}
-            </option>
-          ))}
-        </select>
+        {m.libraries.length === 0 && !m.materialsLoading ? (
+          <div className="xx-empty-state">
+            <p>暂无视频素材库</p>
+            <p style={{ fontSize: 13, color: "var(--text-tertiary)" }}>
+              请先在「素材库」中创建视频素材库并上传视频
+            </p>
+          </div>
+        ) : (
+          <select
+            value={m.selectedLibraryId}
+            onChange={(e) => m.setSelectedLibraryId(e.target.value)}
+          >
+            {m.libraries.map((lib) => (
+              <option key={lib.id} value={lib.id}>
+                {lib.name}
+              </option>
+            ))}
+          </select>
+        )}
       </div>
 
       {m.materialMode === "manual" && (

apps/web/src/pages/generate/components/Step5VoiceSelect.tsx

@@ -37,6 +37,12 @@ const isAiVoice = (item: AssetItem): boolean => {
   return (!duration || duration <= 0) && (!size || size <= 0)
 }
 
+/** 格式化时长（秒 → "14.7秒"；0/无效 → "时长未知"，不做任何时长过滤） */
+const formatDurationSeconds = (seconds?: number): string => {
+  if (!seconds || seconds <= 0) return "时长未知"
+  return `${seconds.toFixed(1)}秒`
+}
+
 /** 格式化文件大小 */
 const formatFileSize = (bytes?: number): string => {
   if (!bytes || bytes <= 0) return "未知"
@@ -261,7 +267,9 @@ const Step5VoiceSelect: React.FC<Step5VoiceSelectProps> = ({
               >
                 {isAiVoice(item) ? (
                   <span style={{ color: "#1677ff", fontWeight: 500 }}>AI 音色</span>
-                ) : null}
+                ) : (
+                  <span>{formatDurationSeconds(getDuration(item))}</span>
+                )}
                 <span>{isAiVoice(item) ? "按文本合成" : formatFileSize(getFileSize(item))}</span>
               </div>
             </div>

apps/web/src/pages/generate/components/Step6CoverSettings.tsx

@@ -91,11 +91,13 @@ const Step6CoverSettings: React.FC<Step6CoverSettingsProps> = (props) => {
       shadow: props.titleSettings?.shadow ?? false,
     },
     covers: batchCoversList,
-    onCoversChange: (urls) => {
-      // 按卡片顺序写回对应变体索引
+    onCoversChange: (updater) => {
+      // 按卡片顺序写回对应变体索引；支持函数式 updater（#1750：串行回写避免闭包覆盖）
+      const prevCardView = cardIndexes.map((vi) => (props.previewCovers || [])[vi] || "")
+      const nextCardView = typeof updater === "function" ? updater(prevCardView) : updater
       const next = [...(props.previewCovers || [])]
       cardIndexes.forEach((vi, cardPos) => {
-        next[vi] = urls[cardPos] || ""
+        next[vi] = nextCardView[cardPos] || ""
       })
       props.onPreviewCoversChange?.(next)
     },
@@ -142,7 +144,8 @@ const Step6CoverSettings: React.FC<Step6CoverSettingsProps> = (props) => {
           <Button
             buttonType="primary"
             onClick={() => void batchCovers.generateAll()}
-            disabled={completedVideos.length === 0 || batchCovers.loadingIndex !== null}
+            disabled={completedVideos.length === 0 || batchCovers.busyIndexes.length > 0}
+            style={{ whiteSpace: "nowrap", flexShrink: 0 }}
           >
             ✨ 一键全部自动生成
           </Button>
@@ -151,8 +154,8 @@ const Step6CoverSettings: React.FC<Step6CoverSettingsProps> = (props) => {
         <div className="xx-cover-grid">
           {cardIndexes.map((variantIndex, cardPos) => {
             const url = batchCoversList[cardPos]
-            const isLoading = batchCovers.loadingIndex === cardPos
-            const isUploading = batchCovers.uploadingIndex === cardPos
+            const isLoading = batchCovers.busyIndexes.includes(cardPos)
+            const isUploading = batchCovers.uploadingIndexes.includes(cardPos)
             const title = batchTitles[cardPos]
             return (
               <div className="xx-cover-card" key={variantIndex}>

apps/web/src/pages/generate/components/result-panel/ProgressIndicator.tsx

@@ -1,40 +0,0 @@
-import React from "react"
-import { Typography } from "antd"
-
-const { Text } = Typography
-
-interface ProgressIndicatorProps {
-  progress: number
-}
-
-export const ProgressIndicator: React.FC<ProgressIndicatorProps> = ({ progress }) => {
-  return (
-    <div className="xx-result-progress">
-      <div className="xx-progress-circle">
-        <svg viewBox="0 0 80 80">
-          <circle cx="40" cy="40" r="36" fill="none" stroke="var(--border-color)" strokeWidth="6" />
-          <circle
-            cx="40"
-            cy="40"
-            r="36"
-            fill="none"
-            stroke="var(--primary-color)"
-            strokeWidth="6"
-            strokeDasharray={`${Math.round(progress) * 2.26} 226`}
-            strokeLinecap="round"
-            transform="rotate(-90 40 40)"
-          />
-        </svg>
-        <span className="xx-progress-percent">{Math.round(progress)}%</span>
-      </div>
-      <div className="xx-progress-text">
-        <Text strong style={{ fontSize: 14, display: "block", marginBottom: 4 }}>
-          正在生成视频
-        </Text>
-        <Text style={{ fontSize: 12, color: "var(--text-secondary)" }}>
-          AI 正在处理素材，请稍候…
-        </Text>
-      </div>
-    </div>
-  )
-}

apps/web/src/pages/generate/components/result-panel/ResultVideoCard.tsx

@@ -1,63 +0,0 @@
-import React from "react"
-import { PlayCircleOutlined, DownloadOutlined, ShareAltOutlined } from "@ant-design/icons"
-import type { GeneratedVideo } from "@/api/template-editor"
-import { formatDuration } from "@/api/voice-clone"
-
-interface ResultVideoCardProps {
-  video: GeneratedVideo
-  index: number
-  onPreview: (video: GeneratedVideo) => void
-  onDownload: () => void
-  onShare: () => void
-}
-
-export const ResultVideoCard: React.FC<ResultVideoCardProps> = ({
-  video,
-  index,
-  onPreview,
-  onDownload,
-  onShare,
-}) => {
-  return (
-    <div className="xx-video-card" onClick={() => onPreview(video)}>
-      <div className="xx-video-thumb">
-        {video.thumbnail_url ? (
-          <img src={video.thumbnail_url} alt="" />
-        ) : (
-          <div className="xx-video-thumb-placeholder">
-            <PlayCircleOutlined style={{ fontSize: 32, opacity: 0.5 }} />
-          </div>
-        )}
-        <div className="xx-video-play-overlay">
-          <PlayCircleOutlined style={{ fontSize: 36, color: "#fff" }} />
-        </div>
-        {video.duration && (
-          <span className="xx-video-duration">{formatDuration(video.duration)}</span>
-        )}
-      </div>
-      <div className="xx-video-info">
-        <div className="xx-video-title">视频 {index + 1}</div>
-        <div className="xx-video-actions">
-          <button
-            className="xx-video-action-btn"
-            onClick={(e) => {
-              e.stopPropagation()
-              onDownload()
-            }}
-          >
-            <DownloadOutlined />
-          </button>
-          <button
-            className="xx-video-action-btn"
-            onClick={(e) => {
-              e.stopPropagation()
-              onShare()
-            }}
-          >
-            <ShareAltOutlined />
-          </button>
-        </div>
-      </div>
-    </div>
-  )
-}

apps/web/src/pages/generate/components/step7-confirm/GenerationStatus.tsx

@@ -1,117 +0,0 @@
-import React from "react"
-import { LoadingOutlined, CheckCircleFilled, CloseCircleOutlined } from "@ant-design/icons"
-import type { GeneratedVideo } from "@/api/template-editor"
-
-interface GenerationStatusProps {
-  generating: boolean
-  generated: boolean
-  generateError: string | null
-  progress: number
-  generatedVideos: GeneratedVideo[]
-  getGenerationPhase: (progress: number) => { icon: string; label: string }
-  onScrollToPreview: () => void
-  onRetry: () => void
-  onDismissError: () => void
-}
-
-const GenerationStatus: React.FC<GenerationStatusProps> = ({
-  generating,
-  generated,
-  generateError,
-  progress,
-  generatedVideos,
-  getGenerationPhase,
-  onScrollToPreview,
-  onRetry,
-  onDismissError,
-}) => {
-  return (
-    <div style={{ marginTop: 16 }}>
-      {!generating && !generated && !generateError && (
-        <div className="xx-gen-progress-card" style={{ opacity: 0.85 }}>
-          <div className="xx-gen-progress-header">
-            <div className="xx-gen-progress-icon">🎬</div>
-            <div className="xx-gen-progress-info">
-              <div className="xx-gen-progress-phase">尚未开始生成视频</div>
-              <div className="xx-gen-progress-sub">
-                请返回「选择标题」步骤，点击「确认生成视频」开始渲染最终视频
-              </div>
-            </div>
-          </div>
-        </div>
-      )}
-      {generating && (
-        <div className="xx-gen-progress-card">
-          <div className="xx-gen-progress-header">
-            <div className="xx-gen-progress-icon">
-              <LoadingOutlined />
-            </div>
-            <div className="xx-gen-progress-info">
-              <div className="xx-gen-progress-phase">
-                {getGenerationPhase(progress).icon} {getGenerationPhase(progress).label}
-              </div>
-              <div className="xx-gen-progress-sub">预计还需 1-2 分钟，请稍候…</div>
-            </div>
-            <div className="xx-gen-progress-percent">{Math.round(progress)}%</div>
-          </div>
-          <div className="xx-gen-progress-bar">
-            <div
-              className="xx-gen-progress-bar-fill"
-              style={{ width: `${Math.min(Math.round(progress), 100)}%` }}
-            />
-          </div>
-          <div className="xx-gen-progress-tip">
-            💡 生成过程中可以切换到其他页面操作，完成后会自动通知
-          </div>
-        </div>
-      )}
-      {generated && !generating && (
-        <div className="xx-gen-success-card">
-          <div className="xx-gen-success-icon">
-            <CheckCircleFilled style={{ fontSize: 32, color: "#52c41a" }} />
-          </div>
-          <div className="xx-gen-success-info">
-            <div className="xx-gen-success-title">视频生成完成！</div>
-            <div className="xx-gen-success-sub">
-              共生成 {generatedVideos.length} 条视频，可在右侧预览或前往成片库查看
-            </div>
-          </div>
-          <button
-            type="button"
-            className="xx-btn xx-btn-primary xx-btn-sm"
-            onClick={onScrollToPreview}
-          >
-            查看结果
-          </button>
-        </div>
-      )}
-      {generateError && !generating && (
-        <div className="xx-gen-error-card">
-          <div className="xx-gen-error-icon">
-            <CloseCircleOutlined style={{ fontSize: 28, color: "#ef4444" }} />
-          </div>
-          <div className="xx-gen-error-info">
-            <div className="xx-gen-error-title">生成失败</div>
-            <div className="xx-gen-error-msg">
-              {typeof generateError === "string" ? generateError : JSON.stringify(generateError)}
-            </div>
-          </div>
-          <div style={{ display: "flex", gap: 8 }}>
-            <button type="button" className="xx-btn xx-btn-primary xx-btn-sm" onClick={onRetry}>
-              🔄 重试
-            </button>
-            <button
-              type="button"
-              className="xx-btn xx-btn-ghost xx-btn-sm"
-              onClick={onDismissError}
-            >
-              知道了
-            </button>
-          </div>
-        </div>
-      )}
-    </div>
-  )
-}
-
-export default GenerationStatus

apps/web/src/pages/generate/generate.css

@@ -117,10 +117,6 @@
   grid-template-columns: 1fr;
 }
 
-.xx-generate-layout.full-width .xx-generate-right-col {
-  display: none;
-}
-
 /* ============================================================
    左侧表单区 generate-form
    ============================================================ */
@@ -2323,28 +2319,6 @@
    生成结果（右侧）
    ================================================================ */
 
-.xx-generate-right-col {
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  gap: 16px;
-}
-
-/* ── 内联视频播放器（右侧） ── */
-.xx-inline-video-player {
-  width: 100%;
-  max-width: 320px;
-  background: var(--bg-surface, #fff);
-  border: 1px solid var(--border-primary, #e2e8f0);
-  border-radius: 16px;
-  padding: 16px;
-  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
-}
-
-.xx-inline-video-player video {
-  background: #000;
-}
-
 .xx-preview-header {
   display: flex;
   align-items: center;
@@ -2710,11 +2684,12 @@
 
 /* ── 封面设置区域改造样式 ── */
 
-/* 封面操作按钮区 */
+/* 封面操作按钮区（单视频全宽页居中） */
 .xx-cover-actions {
   display: flex;
   gap: 12px;
   margin-bottom: 12px;
+  justify-content: center;
 }
 
 /* 已选模板文字 */
@@ -3202,10 +3177,11 @@
   margin: 0;
 }
 
-/* ── 批量封面网格 ── */
+/* ── 批量封面网格（单卡/少卡时居中排列，卡片限宽不拉伸） ── */
 .xx-cover-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
+  grid-template-columns: repeat(auto-fill, minmax(180px, 220px));
+  justify-content: center;
   gap: 16px;
 }
 
@@ -3282,17 +3258,28 @@
 /* ============================================================
    批量前端 Canvas 预览网格（Issue #1677 修正：纯前端实时预览）
    ============================================================ */
+/* #1741：卡片整体缩小至约 3/5——宽屏排 3 列（卡片限宽 220px 居中），
+   中屏自动回退 2 列，窄屏 1 列（见下方媒体查询）；卡片保持 9:16 比例不变形 */
 .xx-canvas-grid {
   display: grid;
-  grid-template-columns: repeat(2, 1fr);
-  gap: 16px;
+  grid-template-columns: repeat(auto-fill, minmax(160px, 180px));
+  justify-content: center;
+  gap: 14px;
+}
+
+/* 窄屏单列时卡片限宽居中，避免 1fr 拉伸导致卡片过高 */
+@media (max-width: 960px) {
+  .xx-canvas-grid {
+    grid-template-columns: minmax(0, 320px);
+  }
 }
 
 .xx-canvas-grid-card {
+  position: relative;
   border: 2px solid var(--border-primary, #e2e8f0);
   border-radius: 12px;
   overflow: hidden;
-  background: #000;
+  background: transparent;
   transition: border-color 0.2s ease;
   min-width: 0;
 }
@@ -3330,6 +3317,37 @@
   accent-color: var(--primary-color, #1677ff);
 }
 
+/* #1750：批量变体片段加载/错误占位（9:16 竖屏比例，与播放器卡片同尺寸防塌陷） */
+.xx-variant-clips-status {
+  position: relative;
+  width: 100%;
+  aspect-ratio: 9 / 16;
+  max-height: 70vh;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 4px;
+  font-size: 13px;
+  color: rgba(255, 255, 255, 0.75);
+  background: #0a0a0a;
+  border-radius: 16px;
+  overflow: hidden;
+  box-shadow:
+    0 4px 6px -1px rgba(0, 0, 0, 0.3),
+    0 20px 50px -12px rgba(0, 0, 0, 0.5),
+    inset 0 0 0 1px rgba(255, 255, 255, 0.06);
+}
+
+.xx-variant-clips-status .anticon {
+  font-size: 22px;
+}
+
+.xx-variant-clips-error-text {
+  color: rgba(255, 255, 255, 0.85);
+  font-size: 13px;
+}
+
 /* ============================================================
    批量标题：AI 一键生成行（Issue #1677）
    ============================================================ */
@@ -3361,16 +3379,18 @@
    第5步确认生成：批量渲染进度网格（Issue #1677）
    ============================================================ */
 .xx-batch-gen-grid {
+  justify-items: center;
   display: grid;
-  grid-template-columns: repeat(2, 1fr);
-  gap: 16px;
+  grid-template-columns: repeat(auto-fill, minmax(160px, 180px));
+  justify-content: center;
+  gap: 14px;
 }
 
 .xx-batch-gen-card {
   border: 1px solid var(--border-primary, #e2e8f0);
   border-radius: 12px;
   padding: 14px;
-  background: var(--bg-surface, #fff);
+  background: transparent;
   display: flex;
   flex-direction: column;
   gap: 10px;
@@ -3435,10 +3455,10 @@
   word-break: break-word;
 }
 
-/* ── 响应式：窄屏批量网格回退单列 ── */
+/* ── 响应式：窄屏批量网格回退单列（.xx-canvas-grid 的窄屏限宽见网格定义处 #1741） ── */
 @media (max-width: 960px) {
-  .xx-canvas-grid,
   .xx-batch-gen-grid {
-    grid-template-columns: 1fr;
+    justify-items: center;
+    grid-template-columns: minmax(0, 320px);
   }
 }

apps/web/src/pages/generate/hooks/generate-video/types.ts

@@ -42,6 +42,12 @@ export interface UseGenerateVideoProps {
   variantCoverUrls?: string[]
   /** 勾选要生成的变体索引（批量模式） */
   selectedVariantIndexes?: number[]
+  /**
+   * 批量变体剪辑计划 ID（#1744，按变体全量索引长度=previewCount）：
+   * 预览阶段后端独立选片产出，正式生成按勾选顺序回传，实现预览即成片；
+   * 为空（降级本地模拟/后端未上线）时不传，后端自行独立选片。
+   */
+  variantPlanIds?: string[]
 }
 
 /** 生成阶段 */

apps/web/src/pages/generate/hooks/step2-materials/useMaterialLibrary.ts

@@ -8,11 +8,22 @@ import type { AssetItem } from "@/api/assets"
  * 管理素材库列表、当前选中库、素材列表加载
  */
 export function useMaterialLibrary() {
-  /* ── 素材库数据 API ── */
-  const { data: libraries = [] } = useQuery({
-    queryKey: ["asset-libraries"],
-    queryFn: getAssetLibraries,
+  /* ── 素材库数据 API ──
+   * Step2 是视频选片，只拉取 kind=video 的素材库（#1777）：
+   * 后端按 kind 查询参数过滤，前端 getAssetLibraries("video") 再兜底过滤一次，
+   * 避免配音库(voice)/图片库(image) 混进「选择视频库」下拉。
+   * queryKey 带 kind，与素材管理页/配音页的 ["asset-libraries"] 全量缓存隔离。
+   */
+  const { data: allLibraries = [] } = useQuery({
+    queryKey: ["asset-libraries", "video"],
+    queryFn: () => getAssetLibraries("video"),
+    staleTime: 60_000,
   })
+  // 前端兜底过滤：仅保留 kind=video 的素材库（后端按 kind 查询参数过滤）
+  const libraries = useMemo(
+    () => allLibraries.filter((lib) => lib.kind === "video"),
+    [allLibraries],
+  )
   const [selectedLibraryId, setSelectedLibraryId] = useState<string>("")
 
   // 自动选中第一个视频库

apps/web/src/pages/generate/hooks/step2-materials/useSmartMatch.ts

@@ -13,21 +13,22 @@ interface UseSmartMatchOptions {
 }
 
 /** 默认 limit（拿不到目标时长时的兜底上限） */
-const DEFAULT_LIMIT = 10
-/** 每个素材切片按 15 秒估算所需素材数 */
-const SECONDS_PER_ASSET = 15
+const DEFAULT_LIMIT = 30
+/**
+ * 候选池放大倍数（#1744）：批量 N 个变体独立选片、跨变体 20% 区间避让需要
+ * 足够大的素材池才能保证 N 条成片素材排布互不相同（历史已用区间写回素材 metadata）。
+ * 旧规则「总时长/15 秒」只够 1 条成片的选片量，池太小会导致变体间大量复用同区间。
+ */
+const ASSET_POOL_MULTIPLIER = 3
 
 /**
- * 根据模板 segments 计算所需素材数量上限。
- * 取每个 segment 的 duration_min 之和作为目标视频总时长，
- * 再按 15 秒/素材估算需要多少个素材，且保证不少于片段数（每个片段至少 1 个素材）；
- * 结果钳制到 [1, 200] 区间（后端 limit 上限 200）。
+ * 根据模板 segments 计算智能匹配候选素材数量上限（#1750：模板无时长概念）。
+ * 候选池 = 片段数 × 3：每个片段至少 3 个候选素材供变体间洗牌/避让
+ * （独立选片 + 区间不重叠）；结果钳制到 [1, 200] 区间（后端 limit 上限 200）。
  */
-function computeLimitFromSegments(segments?: TemplateSegment[]): number {
+export function computeLimitFromSegments(segments?: TemplateSegment[]): number {
   if (!segments || segments.length === 0) return DEFAULT_LIMIT
-  const totalSeconds = segments.reduce((sum, seg) => sum + (seg.duration_min || 0), 0)
-  if (totalSeconds <= 0) return DEFAULT_LIMIT
-  const limit = Math.max(segments.length, Math.ceil(totalSeconds / SECONDS_PER_ASSET))
+  const limit = segments.length * ASSET_POOL_MULTIPLIER
   return Math.max(1, Math.min(limit, 200))
 }
 

apps/web/src/pages/generate/hooks/useBatchCovers.ts

@@ -1,6 +1,13 @@
 /**
- * 批量封面 Hook（Issue #1677）
+ * 批量封面 Hook（Issue #1677 / #1750 修复）
  * N 个视频时：逐个自动生成封面（从对应成片抽帧 + 叠加对应标题）或上传自定义封面
+ *
+ * #1750 修复：
+ * - patchCover 改为函数式 updater 回写（onCoversChange 支持 (prev)=>next），
+ *   修复串行 generateAll 时闭包捕获旧 covers 数组导致回写互相覆盖的 bug；
+ * - loading/uploading 状态改数组（busyIndexes/uploadingIndexes），支持多个卡片在途；
+ * - generateOne 返回 boolean，generateAll 据此统计成功/失败数量分级提示，单个失败不阻塞；
+ * - generateAll 一次点击即处理所有未生成封面（无需点 3 次）。
  */
 import { useCallback, useState } from "react"
 import { message } from "antd"
@@ -8,6 +15,9 @@ import { generateCover } from "@/api/generation"
 import { uploadAssetDirect, getAssetLibraries } from "@/api/assets"
 import type { GeneratedVideo } from "@/api/template-editor"
 
+/** onCoversChange 支持直接传值或函数式 updater（函数式用于串行回写避免闭包覆盖） */
+type CoversChangeFn = (updater: string[] | ((prev: string[]) => string[])) => void
+
 interface UseBatchCoversOptions {
   selectedTemplate: string
   generatedVideos: GeneratedVideo[]
@@ -24,7 +34,7 @@ interface UseBatchCoversOptions {
     shadow: boolean
   }
   covers: string[]
-  onCoversChange: (urls: string[]) => void
+  onCoversChange: CoversChangeFn
 }
 
 export function useBatchCovers({
@@ -35,28 +45,46 @@ export function useBatchCovers({
   covers,
   onCoversChange,
 }: UseBatchCoversOptions) {
-  const [loadingIndex, setLoadingIndex] = useState<number | null>(null)
-  const [uploadingIndex, setUploadingIndex] = useState<number | null>(null)
+  /** 正在自动生成封面的变体序号集合（数组支持多个卡片同时在途） */
+  const [busyIndexes, setBusyIndexes] = useState<number[]>([])
+  /** 正在上传自定义封面的变体序号集合 */
+  const [uploadingIndexes, setUploadingIndexes] = useState<number[]>([])
 
+  const addBusy = useCallback((i: number) => {
+    setBusyIndexes((prev) => (prev.includes(i) ? prev : [...prev, i]))
+  }, [])
+  const removeBusy = useCallback((i: number) => {
+    setBusyIndexes((prev) => prev.filter((x) => x !== i))
+  }, [])
+  const addUploading = useCallback((i: number) => {
+    setUploadingIndexes((prev) => (prev.includes(i) ? prev : [...prev, i]))
+  }, [])
+  const removeUploading = useCallback((i: number) => {
+    setUploadingIndexes((prev) => prev.filter((x) => x !== i))
+  }, [])
+
+  /** 函数式回写单个封面位置（基于最新 prev，不受闭包旧值影响） */
   const patchCover = useCallback(
     (index: number, url: string) => {
-      const next = [...covers]
-      next[index] = url
-      onCoversChange(next)
+      onCoversChange((prev) => {
+        const next = [...prev]
+        next[index] = url
+        return next
+      })
     },
-    [covers, onCoversChange],
+    [onCoversChange],
   )
 
-  /** 为第 index 个视频自动生成封面 */
+  /** 为第 index 个视频自动生成封面；返回是否成功（供 generateAll 统计） */
   const generateOne = useCallback(
-    async (index: number) => {
+    async (index: number): Promise<boolean> => {
       const finalVideos = generatedVideos.filter((v) => v.status === "completed")
       const target = finalVideos[index] || generatedVideos[index]
       if (!target) {
         message.warning("该视频尚未生成完成")
-        return
+        return false
       }
-      setLoadingIndex(index)
+      addBusy(index)
       try {
         const titleText = titles[index] || ""
         const response = await generateCover(selectedTemplate, {
@@ -82,23 +110,25 @@ export function useBatchCovers({
         if (url) {
           patchCover(index, url)
           message.success(`视频 ${index + 1} 封面生成成功`)
-        } else {
-          message.warning(`视频 ${index + 1} 封面生成未返回图片，请重试`)
+          return true
         }
+        message.warning(`视频 ${index + 1} 封面生成未返回图片，请重试`)
+        return false
       } catch (err) {
         console.error(`[封面] 视频 ${index + 1} 生成失败:`, err)
         message.error(`视频 ${index + 1} 封面生成失败，请重试`)
+        return false
       } finally {
-        setLoadingIndex(null)
+        removeBusy(index)
       }
     },
-    [generatedVideos, titles, titleStyle, selectedTemplate, patchCover],
+    [generatedVideos, titles, titleStyle, selectedTemplate, patchCover, addBusy, removeBusy],
   )
 
   /** 为第 index 个视频上传自定义封面 */
   const uploadOne = useCallback(
     async (index: number, file: File) => {
-      setUploadingIndex(index)
+      addUploading(index)
       try {
         const libs = await getAssetLibraries()
         const imageLib = libs.find((l) => l.kind === "image") || libs[0]
@@ -121,26 +151,43 @@ export function useBatchCovers({
         console.error(`[封面] 视频 ${index + 1} 上传失败:`, err)
         message.error("封面上传失败，请重试")
       } finally {
-        setUploadingIndex(null)
+        removeUploading(index)
       }
     },
-    [patchCover],
+    [patchCover, addUploading, removeUploading],
   )
 
-  /** 一键全部自动生成（串行，避免队列限流） */
+  /** 一键全部自动生成（串行，避免队列限流；单个失败不阻塞，结束后分级提示） */
   const generateAll = useCallback(async () => {
     const finalVideos = generatedVideos.filter((v) => v.status === "completed")
-    for (let i = 0; i < finalVideos.length; i++) {
-      if (covers[i]) continue // 已有封面跳过
+    const total = finalVideos.length
+    // 待处理：基于调用时刻的 covers 快照判断（已有封面跳过）；
+    // 回写走函数式 updater，循环内不再依赖可能过期的 covers 闭包
+    const pending = finalVideos.map((_, i) => i).filter((i) => !covers[i])
+    if (pending.length === 0) {
+      message.info("所有视频封面已生成")
+      return
+    }
+    let okCount = 0
+    let failCount = 0
+    for (const i of pending) {
       // eslint-disable-next-line no-await-in-loop
-      await generateOne(i)
+      const ok = await generateOne(i)
+      if (ok) okCount += 1
+      else failCount += 1
+    }
+    if (failCount === 0) {
+      message.success(`全部 ${total} 个封面已生成`)
+    } else if (okCount === 0) {
+      message.error("封面生成全部失败，请重试")
+    } else {
+      message.warning(`已生成 ${okCount} 个封面，${failCount} 个失败，请对失败项重试`)
     }
-    message.success("全部封面已生成")
   }, [generatedVideos, covers, generateOne])
 
   return {
-    loadingIndex,
-    uploadingIndex,
+    busyIndexes,
+    uploadingIndexes,
     generateOne,
     uploadOne,
     generateAll,

apps/web/src/pages/generate/hooks/useBatchVariantPlans.ts

@@ -0,0 +1,153 @@
+/**
+ * 批量变体真实片段 Hook（#1744 接入 / #1750 修正）
+ *
+ * 批量预览（N>1）进入第 4 步时，向后端轻量接口 POST /generation/variant-plans
+ * 申请 N 个变体的独立剪辑计划片段：
+ * - 接口只做选片/建 plan（秒级），不渲染视频，无渲染成本；
+ * - 选片逻辑与正式批量生成（POST /generation/tasks?count=N）完全同源
+ *   （reselect_plan_for_variant：素材洗牌 + main 片段洗牌 + 起点随机 +
+ *   跨变体 20% 区间避让 + 使用区间写回素材 metadata），
+ *   因此前端按这些 clips 播放的预览与最终成片一致；
+ * - 正式生成时把 plan_ids 回传，后端直接关联预览 plan 渲染，不再重新选片。
+ *
+ * 错误处理（#1750 基线：严禁用前端假数据冒充预览）：
+ * - 端点 404（后端未上线）/ 400 / 网络错误 / 超时：一律置 error 状态，
+ *   UI 显示「预览加载失败，请重试」，不再静默降级本地模拟；
+ * - 单个变体 clips 为空同样视为加载失败（计划数据不完整）。
+ *
+ * N=1 不调用本 hook（单视频零回归）。
+ */
+import { useCallback, useEffect, useRef, useState } from "react"
+import type { EditPlanClip } from "@/api/template-editor"
+import { createBatchVariantPlans, type VariantPlan } from "@/api/generation/variantPlans"
+
+export interface BatchVariantClipsState {
+  /** 各变体的服务端真实片段（按 variant_index 排序）；未就绪为空数组 */
+  clipsByVariant: EditPlanClip[][]
+  /** 各变体的 plan_id（正式生成回传，保证预览即成片）；未就绪为空串 */
+  planIdsByVariant: string[]
+  /** 是否正在向后端申请变体计划 */
+  loading: boolean
+  /** 后端真实片段是否全部可用（每个变体都有 ≥1 条片段） */
+  ready: boolean
+  /** 加载失败（端点未上线/网络错误/数据不完整）；true 时 UI 显示错误态+重试 */
+  error: boolean
+  /** 用户点击「重试」：强制重新申请变体计划 */
+  retry: () => void
+}
+
+interface UseBatchVariantPlansOptions {
+  /** 是否启用：仅批量（count>1）且素材已选时为 true */
+  enabled: boolean
+  count: number
+  templateId: string
+  assetIds: string[]
+  /** 源剪辑计划 ID（草稿/预览关联），无则空串由后端兜底最新 plan */
+  sourcePlanId?: string
+}
+
+export function useBatchVariantPlans({
+  enabled,
+  count,
+  templateId,
+  assetIds,
+  sourcePlanId = "",
+}: UseBatchVariantPlansOptions): BatchVariantClipsState {
+  const [clipsByVariant, setClipsByVariant] = useState<EditPlanClip[][]>([])
+  const [planIdsByVariant, setPlanIdsByVariant] = useState<string[]>([])
+  const [loading, setLoading] = useState(false)
+  const [error, setError] = useState(false)
+
+  const requestSeqRef = useRef(0)
+  // 记录上次成功申请的入参指纹，素材/数量未变时不重复请求
+  const lastKeyRef = useRef("")
+  // 重试计数（state）：用户点重试时 +1，驱动 effect 重新发起请求（即使指纹相同）；
+  // 用 state 而非 ref + 直接调 load，避免 retry 与 effect 双发导致 seq 竞争
+  const [retryNonce, setRetryNonce] = useState(0)
+
+  const load = useCallback(async () => {
+    const seq = ++requestSeqRef.current
+    setLoading(true)
+    setError(false)
+    try {
+      const resp = await createBatchVariantPlans({
+        template_id: templateId,
+        asset_ids: assetIds,
+        count,
+        ...(sourcePlanId ? { source_edit_plan_id: sourcePlanId } : {}),
+      })
+      if (seq !== requestSeqRef.current) return
+
+      const items: VariantPlan[] = Array.isArray(resp.items) ? resp.items : []
+      const clips: EditPlanClip[][] = Array.from({ length: count }, () => [])
+      const planIds: string[] = Array.from({ length: count }, () => "")
+      for (const item of items) {
+        const idx = item.variant_index
+        if (idx < 0 || idx >= count) continue
+        planIds[idx] = item.plan_id || ""
+        clips[idx] = (item.clips || [])
+          .filter((c) => c && c.asset_id && c.status === "ready")
+          .sort((a, b) => a.order - b.order)
+      }
+      // 数据完整性校验：每个变体都必须有真实片段，否则视为失败（不允许假数据冒充）
+      const incomplete = clips.some((list) => list.length === 0)
+      if (incomplete) {
+        console.warn("[useBatchVariantPlans] 变体计划数据不完整（存在空片段变体），标记加载失败")
+        setClipsByVariant([])
+        setPlanIdsByVariant([])
+        setError(true)
+      } else {
+        setClipsByVariant(clips)
+        setPlanIdsByVariant(planIds)
+        setError(false)
+      }
+    } catch (err) {
+      if (seq !== requestSeqRef.current) return
+      // 404（后端端点未上线）/ 400（参数错误）/ 网络错误 / 超时：统一错误态
+      console.warn("[useBatchVariantPlans] 申请变体计划失败，预览加载失败:", err)
+      setClipsByVariant([])
+      setPlanIdsByVariant([])
+      setError(true)
+    } finally {
+      if (seq === requestSeqRef.current) setLoading(false)
+    }
+  }, [templateId, count, sourcePlanId, assetIds])
+
+  /** 用户点击「重试」：nonce +1 驱动 effect 重新发起请求（effect 内 lastKey 校验保证只发一次） */
+  const retry = useCallback(() => {
+    setRetryNonce((n) => n + 1)
+  }, [])
+
+  useEffect(() => {
+    if (!enabled || !templateId || assetIds.length === 0 || count <= 1) {
+      requestSeqRef.current += 1
+      // 函数式更新：已是目标值时返回 prev（Object.is 相等 React 跳过渲染），
+      // 避免父组件传入内联字面量数组导致 effect 每次 render 触发 → 无限 setState 循环
+      setClipsByVariant((prev) => (prev.length === 0 ? prev : []))
+      setPlanIdsByVariant((prev) => (prev.length === 0 ? prev : []))
+      setLoading((prev) => (prev === false ? prev : false))
+      setError((prev) => (prev === false ? prev : false))
+      lastKeyRef.current = ""
+      return
+    }
+    const key = `${retryNonce}|${templateId}|${count}|${sourcePlanId}|${[...assetIds]
+      .sort()
+      .join(",")}`
+    if (key === lastKeyRef.current) return
+    lastKeyRef.current = key
+    load()
+  }, [enabled, templateId, count, sourcePlanId, assetIds, load, retryNonce])
+
+  const ready = !error && !loading && clipsByVariant.every((list) => list.length > 0)
+
+  return {
+    clipsByVariant,
+    planIdsByVariant,
+    loading,
+    ready,
+    error,
+    retry,
+  }
+}
+
+export default useBatchVariantPlans

apps/web/src/pages/generate/hooks/useGenerateFormState/index.ts

@@ -40,6 +40,8 @@ export interface GenerateFormState {
   selectedTemplate: string
   setSelectedTemplate: (id: string) => void
   userTemplates: EditingTemplate[]
+  /** 当前选中模板在创建片段时被判失效（404/400/422）后的运行时自动回退 */
+  handleInvalidTemplate: () => boolean
 
   /* 素材 */
   selectedMaterials: string[]
@@ -131,7 +133,8 @@ export const useGenerateFormState = (): GenerateFormState => {
   const [currentStep, setCurrentStep] = useState(1)
 
   /* ── 模板选择 ── */
-  const { selectedTemplate, setSelectedTemplate, userTemplates } = useTemplateSelection()
+  const { selectedTemplate, setSelectedTemplate, userTemplates, handleInvalidTemplate } =
+    useTemplateSelection()
 
   /* ── source_edit_plan_id：仅取 URL 参数，无则 null 让后端兜底 ── */
   // selectedTemplate 是模板 ID 而非 edit_plan_id，不能混淆；
@@ -228,6 +231,7 @@ export const useGenerateFormState = (): GenerateFormState => {
     selectedTemplate,
     setSelectedTemplate,
     userTemplates,
+    handleInvalidTemplate,
     selectedMaterials,
     setSelectedMaterials,
     materialMode,

apps/web/src/pages/generate/hooks/useGenerateFormState/templateFallback.ts

@@ -0,0 +1,81 @@
+/**
+ * 失效模板判定与自动回退工具（#1777）
+ *
+ * 背景：用户进入生成页后，之前选中的模板可能已被删除、或从未配置片段。
+ * 调用片段相关接口（PUT/POST /templates/{id}/editor/clips[...]/from-assets）时：
+ *   - 模板不存在 → 后端返回 404（并行工单 #1774 把「模板不存在」统一为该状态码）
+ *   - 模板无片段配置 → 当前部分场景返回 400（detail 含「片段配置」），
+ *     参数校验类错误返回 422
+ * 这三类响应都说明「当前选中的模板不可用于生成」，应清除失效选择并自动切换到
+ * 第一个有效模板，同时提示用户，而不是让页面卡死、无任何反馈。
+ */
+import type { EditingTemplate } from "@/api/editing-planner"
+
+/** 失效模板相关的 HTTP 状态码 */
+const INVALID_TEMPLATE_STATUSES = new Set([404, 400, 422])
+
+/**
+ * 从任意抛出值（axios 错误）提取 HTTP 状态码。
+ * 非 axios 错误 / 无响应时返回 null。
+ */
+export function getHttpStatus(err: unknown): number | null {
+  if (!err || typeof err !== "object") return null
+  const status = (err as { response?: { status?: number }; status?: number })?.response?.status
+  return typeof status === "number" ? status : null
+}
+
+/** 安全提取后端错误文本（detail/message/msg，422 数组也兜底拼一下） */
+function extractErrorText(err: unknown): string {
+  if (!err || typeof err !== "object") return ""
+  const data = (err as { response?: { data?: unknown } })?.response?.data
+  if (!data) return ""
+  try {
+    const text = JSON.stringify(data)
+    return typeof text === "string" ? text : ""
+  } catch {
+    return ""
+  }
+}
+
+/**
+ * 判断一次 clips/from-assets 请求失败是否因为「模板失效」。
+ *
+ * 严格判定，避免把无关的 400/422（例如素材参数问题）误判为模板失效：
+ *   - 404：模板/编辑计划不存在，一定是模板失效
+ *   - 400：仅当后端文本明确提到「片段配置」（无片段配置无法创建片段）才判定
+ *   - 422：参数校验类，from-assets 场景下命中「片段/segments」相关字段才判定
+ */
+export function isInvalidTemplateError(err: unknown): boolean {
+  const status = getHttpStatus(err)
+  if (status === null || !INVALID_TEMPLATE_STATUSES.has(status)) return false
+  if (status === 404) return true
+
+  const text = extractErrorText(err)
+  if (status === 400) {
+    // 后端当前返回：「模板没有片段配置，无法创建片段」
+    return /片段配置|没有片段|无片段|segments?|clip.*config/i.test(text)
+  }
+  // 422：FastAPI 校验错误，命中模板片段相关字段
+  return /segment|clip|片段|模板/i.test(text)
+}
+
+/**
+ * 判断模板是否可用于生成（有效模板）。
+ *
+ * 有效 = 处于激活态（is_active !== false，字段缺失视为 true 兼容旧后端）
+ *        且至少配置了一个片段。
+ * 与后端 valid_only 过滤口径保持一致（#1769/#1772），这里是前端双保险。
+ */
+export function isValidTemplate(template: EditingTemplate | null | undefined): boolean {
+  if (!template) return false
+  if (template.is_active === false) return false
+  return (template.segments?.length ?? 0) > 0
+}
+
+/** 从模板列表中取出第一个有效模板，没有则返回 null */
+export function findFirstValidTemplate(
+  templates: EditingTemplate[] | null | undefined,
+): EditingTemplate | null {
+  if (!Array.isArray(templates)) return null
+  return templates.find(isValidTemplate) ?? null
+}

apps/web/src/pages/generate/hooks/useGenerateFormState/useTemplateSelection.ts

@@ -1,22 +1,89 @@
-import { useState, useEffect } from "react"
+import { useState, useEffect, useRef, useCallback, useMemo } from "react"
 import { useQuery } from "@tanstack/react-query"
+import { message } from "antd"
 import { getEditingTemplates } from "@/api/editing-planner"
 import type { EditingTemplate } from "@/api/editing-planner"
+import { findFirstValidTemplate, isValidTemplate } from "./templateFallback"
+
+/** 失效模板自动切换的提示文案 */
+export const INVALID_TEMPLATE_FALLBACK_TOAST = "原模板已失效，已自动切换"
 
 export function useTemplateSelection() {
+  // selectedTemplate 纯内存状态，绝不写入 localStorage/sessionStorage/URL，
+  // 因此失效模板 ID 不会被持久化、刷新后也不会恢复（#1777 要求 4）
   const [selectedTemplate, setSelectedTemplate] = useState("")
-  const { data: userTemplates = [] } = useQuery<EditingTemplate[]>({
+
+  const { data: allTemplates = [] } = useQuery<EditingTemplate[]>({
     queryKey: ["generate-templates"],
-    queryFn: () => getEditingTemplates(),
+    // valid_only：后端过滤掉没有片段配置的无效模板（#1769/#1772）。
+    // 旧后端忽略该 query 参数时，下方 isValidTemplate 前端兜底再过滤一次。
+    queryFn: () => getEditingTemplates({ validOnly: true }),
     staleTime: 60_000,
   })
 
-  /* 模板加载完成后自动选中第一个 */
-  useEffect(() => {
-    if (userTemplates.length > 0 && !selectedTemplate) {
-      setSelectedTemplate(userTemplates[0].id)
-    }
-  }, [userTemplates, selectedTemplate])
+  // 双保险：后端 valid_only 已过滤，前端再按 is_active + segments 兜底，
+  // 保证下拉/自动选择只包含可用于生成的有效模板。
+  // 用 useMemo 缓存引用，避免每次渲染都 .filter 创建新数组，
+  // 导致下游 useTitleCoverSync effect 无限触发、覆盖用户手动修改（#1789）
+  const validTemplates = useMemo(() => allTemplates.filter(isValidTemplate), [allTemplates])
+  const userTemplates = validTemplates
 
-  return { selectedTemplate, setSelectedTemplate, userTemplates }
+  // 用 ref 持有最新值，供稳定回调 handleInvalidTemplate 使用（避免闭包拿到旧值）
+  const templatesRef = useRef(validTemplates)
+  templatesRef.current = validTemplates
+  const selectedRef = useRef(selectedTemplate)
+  selectedRef.current = selectedTemplate
+  // 已提示过失效的模板 ID，避免用户停留在失效模板上时 clips 防抖请求反复弹 toast；
+  // 用户手动切换/成功切换后重置，保证下一个失效模板仍能提示
+  const fallbackNotifiedRef = useRef<string>("")
+
+  /* 自动选择：模板加载完成且当前未选中时，自动选中第一个有效模板。
+   * 用户手动选择（setSelectedTemplate 被显式调用）后 selectedTemplate 非空，
+   * 本 effect 直接 return，绝不覆盖用户的手动选择（#1777 要求 4：手动优先）。 */
+  useEffect(() => {
+    if (selectedTemplate) return
+    const firstValid = validTemplates[0]
+    if (firstValid) {
+      setSelectedTemplate(firstValid.id)
+    }
+  }, [validTemplates, selectedTemplate])
+
+  /** 用户手动选择模板：优先级最高，重置失效提示标记 */
+  const handleSelectTemplate = useCallback((id: string) => {
+    fallbackNotifiedRef.current = ""
+    setSelectedTemplate(id)
+  }, [])
+
+  /**
+   * 运行时失效回退（#1777 要求 3）：
+   * 创建片段接口返回 404（模板不存在）/ 400/422（模板无片段配置）时调用。
+   *  - 清除失效选择，自动切换到第一个有效模板，并 toast 提示；
+   *  - 没有有效模板时清空选择，Step1 展示明确的「暂无可用模板」空状态引导，
+   *    不让用户卡在失效模板上。
+   * 返回 true 表示已按「模板失效」处理（调用方可据此静默原始错误提示）。
+   */
+  const handleInvalidTemplate = useCallback((): boolean => {
+    const current = selectedRef.current
+    // 同一个失效模板只提示一次（clips 防抖 effect 在素材/模板变化时会反复触发）
+    if (current && fallbackNotifiedRef.current === current) return true
+
+    const fallback = findFirstValidTemplate(templatesRef.current)
+    fallbackNotifiedRef.current = current || "__empty__"
+    if (fallback) {
+      setSelectedTemplate(fallback.id)
+      message.warning(INVALID_TEMPLATE_FALLBACK_TOAST)
+    } else {
+      // 没有任何有效模板：清空选择，交由 Step1 空状态引导用户去模板编辑器创建
+      setSelectedTemplate("")
+      message.warning("当前没有可用模板，请先在「模板编辑器」中创建并配置片段")
+    }
+    return true
+  }, [])
+
+  return {
+    selectedTemplate,
+    setSelectedTemplate: handleSelectTemplate,
+    userTemplates,
+    handleInvalidTemplate,
+  }
 }

apps/web/src/pages/generate/hooks/useGenerateFormState/useTitleCoverSync.ts

@@ -1,4 +1,4 @@
-import { useEffect } from "react"
+import { useEffect, useRef } from "react"
 import type { TitleSettings } from "../../types"
 import type { CoverConfig } from "../../types/cover"
 import type { EditingTemplate } from "@/api/editing-planner"
@@ -11,7 +11,11 @@ interface UseTitleCoverSyncOptions {
 }
 
 /**
- * 当选中模板变化时，自动同步标题和封面配置
+ * 当选中模板变化时，自动同步标题和封面配置。
+ *
+ * #1789 修复：userTemplates 用 ref 持有最新值，不放入依赖数组。
+ * 否则每次渲染 .filter() 创建的新数组引用都会触发 effect，
+ * 从模板 title_config 覆盖用户手动修改（如字号滑块拖动），导致回弹。
  */
 export function useTitleCoverSync({
   selectedTemplate,
@@ -19,8 +23,12 @@ export function useTitleCoverSync({
   setTitleSettings,
   setCoverSettings,
 }: UseTitleCoverSyncOptions) {
+  // 用 ref 持有最新 userTemplates，避免数组引用变化导致 effect 反复触发
+  const templatesRef = useRef(userTemplates)
+  templatesRef.current = userTemplates
+
   useEffect(() => {
-    const tpl = userTemplates.find((t) => t.id === selectedTemplate)
+    const tpl = templatesRef.current.find((t) => t.id === selectedTemplate)
     if (tpl?.title_config) {
       setTitleSettings((prev: TitleSettings) => ({
         ...prev,
@@ -43,5 +51,7 @@ export function useTitleCoverSync({
         thumbnail_url: tpl.cover_config!.thumbnail_url || prev.thumbnail_url,
       }))
     }
-  }, [selectedTemplate, userTemplates, setTitleSettings, setCoverSettings])
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [selectedTemplate, setTitleSettings, setCoverSettings])
+  // ↑ 移除 userTemplates，只在 selectedTemplate 真正变化时触发
 }

apps/web/src/pages/generate/hooks/useGenerateVideo.ts

@@ -178,6 +178,14 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
         isBatch && props.variantCoverUrls?.length
           ? indexes.map((i) => props.variantCoverUrls![i] || "")
           : []
+      // #1744 变体 plan 数组：预览阶段后端独立选片产出的 plan id，按勾选顺序回传，
+      // 后端直接关联这些 plan 渲染（不再重新选片）→ 预览所见即成片。
+      // 全部为空（降级本地模拟/后端端点未上线）时不传，后端走自身独立选片。
+      const variantPlansArr =
+        isBatch && props.variantPlanIds?.length
+          ? indexes.map((i) => props.variantPlanIds![i] || "")
+          : []
+      const hasVariantPlans = variantPlansArr.some((id) => !!id)
 
       try {
         const taskResp = await createGenerationTask({
@@ -200,6 +208,7 @@ export function useGenerateVideo(props: UseGenerateVideoProps) {
           ...(titlesArr.length ? { titles: titlesArr } : {}),
           ...(voiceArr.length ? { voice_library_ids: voiceArr } : {}),
           ...(coversArr.length ? { cover_urls: coversArr } : {}),
+          ...(hasVariantPlans ? { variant_plan_ids: variantPlansArr } : {}),
           ...(props.titleSettings?.title
             ? {
                 title_config: {

apps/web/src/pages/generate/hooks/usePreviewAssets.ts

@@ -44,6 +44,12 @@ interface UsePreviewAssetsReturn {
   ready: boolean
   /** 手动触发重新加载 */
   reload: () => void
+  /**
+   * 差集补拉（#1750）：后端变体计划 clips 可能引用不在用户已选列表中的素材
+   * （跨素材库选片/素材池扩展），发现 assets 中缺失的 asset_id 时补拉详情并合并，
+   * 保证预览播放器拿得到素材文件 URL，而不是静默丢片段。
+   */
+  ensureAssets: (ids: string[]) => Promise<void>
 }
 
 /**
@@ -91,11 +97,41 @@ export function usePreviewAssets(assetIds: string[], enabled: boolean): UsePrevi
     }
   }, [stableAssetIds, enabled])
 
+  // 补拉用独立序号：不干扰主 load 的竞态守卫
+  const ensureSeqRef = useRef(0)
+  const assetsRef = useRef<AssetItem[]>([])
+  useEffect(() => {
+    assetsRef.current = assets
+  }, [assets])
+
+  /**
+   * 差集补拉（#1750）：变体计划 clips 引用的 asset_id 不在当前素材列表时，
+   * 补拉素材详情并去重合并（不静默丢片段、不用假数据冒充）。
+   */
+  const ensureAssets = useCallback(async (ids: string[]) => {
+    const validIds = ids.filter((id): id is string => typeof id === "string" && id.length > 0)
+    if (!validIds.length) return
+    const seq = ++ensureSeqRef.current
+    const missing = Array.from(new Set(validIds)).filter(
+      (id) => !assetsRef.current.some((a) => a.id === id),
+    )
+    if (!missing.length) return
+    const fetched = await fetchAssetsByIds(missing)
+    if (seq !== ensureSeqRef.current || !fetched.length) return
+    const existing = new Set(assetsRef.current.map((a) => a.id))
+    const additions = fetched.filter((a) => !existing.has(a.id))
+    if (!additions.length) return
+    const merged = [...assetsRef.current, ...additions]
+    assetsRef.current = merged
+    setAssets(merged)
+    setReady(merged.length > 0)
+  }, [])
+
   useEffect(() => {
     load()
   }, [load])
 
-  return { assets, loading, ready, reload: load }
+  return { assets, loading, ready, reload: load, ensureAssets }
 }
 
 /**

apps/web/src/pages/generate/hooks/useSegmentScheduler.ts

@@ -15,6 +15,8 @@ export interface PlaybackSegment {
   startTime: number
   endTime: number
   order: number
+  /** #1754 兜底：配音时长≠clips 总时长时按比例调速，1.0 = 原速 */
+  playbackRate?: number
 }
 
 export interface SegmentSchedulerState {
@@ -131,6 +133,11 @@ export function useSegmentScheduler(segments: PlaybackSegment[]): SegmentSchedul
       if (Math.abs(video.currentTime - localTime) > 0.05) {
         video.currentTime = localTime
       }
+      // #1754：按比例调速（配音时长≠clips 总时长时的前端兜底）
+      const rate = seg.playbackRate || 1
+      if (Math.abs(video.playbackRate - rate) > 0.01) {
+        video.playbackRate = rate
+      }
 
       segIdxRef.current = index
       setCurrentSegmentIndex(index)
@@ -242,6 +249,12 @@ export function useSegmentScheduler(segments: PlaybackSegment[]): SegmentSchedul
       video.currentTime = seg.startTime
     }
 
+    // #1754：调速
+    const rate = seg?.playbackRate || 1
+    if (Math.abs(video.playbackRate - rate) > 0.01) {
+      video.playbackRate = rate
+    }
+
     try {
       await video.play()
       setIsPlaying(true)

apps/web/src/pages/generate/hooks/useServerPreview.ts

@@ -1,297 +0,0 @@
-/**
- * 服务器渲染预览 Hook
- *
- * 核心职责：
- * 1. 调用 POST /generation/preview 创建服务器预览渲染任务
- * 2. 轮询 GET /generation/preview/{task_id} 直到完成
- * 3. 返回服务器渲染的真实视频 URL（供 <video> 标签播放）
- * 4. 检测配置变更，标记预览失效（stale）或自动重新渲染
- * 5. 网络错误自动重试 2 次
- *
- * 状态机：
- *   idle → loading → ready → stale (config changed)
- *                   ↘ failed → idle (retry)
- */
-import { useState, useCallback, useRef, useEffect } from "react"
-import { createPreview, getPreviewStatus } from "@/api/generation/preview"
-import type { CreatePreviewRequest } from "@/api/generation/types"
-
-export type ServerPreviewStatus = "idle" | "loading" | "ready" | "stale" | "failed"
-
-interface UseServerPreviewOptions {
-  /** 是否启用预览（Step4+ 且有素材和模板时） */
-  enabled: boolean
-  /** 构建预览请求参数（每次 render 调用，获取最新配置） */
-  buildRequest: () => CreatePreviewRequest
-  /** 预览任务创建成功回调 */
-  onPreviewTaskCreated?: (taskId: string, sourceEditPlanId?: string) => void
-}
-
-interface UseServerPreviewReturn {
-  status: ServerPreviewStatus
-  videoUrl: string | null
-  error: string | null
-  /** 进度 0-100 */
-  progress: number
-  /** 手动触发预览创建（"重新预览"按钮或标题变更后手动刷新） */
-  triggerPreview: () => void
-  /** 当前预览任务 ID */
-  taskId: string | null
-}
-
-const POLL_INTERVAL = 2000
-const POLL_TIMEOUT = 120_000
-const MAX_NETWORK_RETRIES = 2
-
-/**
- * 对配置参数做指纹，用于检测配置是否变化
- */
-function buildFingerprint(req: CreatePreviewRequest): string {
-  return JSON.stringify({
-    t: req.template_id,
-    a: [...req.asset_ids].sort(),
-    d: req.duration,
-    r: req.video_ratio,
-    v: req.voice_library_id,
-    b: req.bgm_config,
-    title: req.title_config,
-  })
-}
-
-export function useServerPreview({
-  enabled,
-  buildRequest,
-  onPreviewTaskCreated,
-}: UseServerPreviewOptions): UseServerPreviewReturn {
-  const [status, setStatus] = useState<ServerPreviewStatus>("idle")
-  const [videoUrl, setVideoUrl] = useState<string | null>(null)
-  const [error, setError] = useState<string | null>(null)
-  const [progress, setProgress] = useState(0)
-  const [taskId, setTaskId] = useState<string | null>(null)
-
-  const pollTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
-  const timeoutTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
-  const requestSeqRef = useRef(0)
-  const renderedFingerprintRef = useRef<string>("")
-  const mountedRef = useRef(true)
-  const networkRetriesRef = useRef(0)
-
-  // 始终持有最新的 buildRequest 和回调
-  const buildRequestRef = useRef(buildRequest)
-  buildRequestRef.current = buildRequest
-  const onCreatedRef = useRef(onPreviewTaskCreated)
-  onCreatedRef.current = onPreviewTaskCreated
-
-  /* ── 清理 ── */
-  const clearTimers = useCallback(() => {
-    if (pollTimerRef.current) {
-      clearTimeout(pollTimerRef.current)
-      pollTimerRef.current = null
-    }
-    if (timeoutTimerRef.current) {
-      clearTimeout(timeoutTimerRef.current)
-      timeoutTimerRef.current = null
-    }
-  }, [])
-
-  useEffect(() => {
-    mountedRef.current = true
-    return () => {
-      mountedRef.current = false
-      clearTimers()
-    }
-  }, [clearTimers])
-
-  /* ── 创建预览 + 轮询 ── */
-  const createAndPoll = useCallback(
-    async (request: CreatePreviewRequest, seq: number) => {
-      setStatus("loading")
-      setProgress(0)
-      setError(null)
-      networkRetriesRef.current = 0
-
-      try {
-        const resp = await createPreview(request)
-        if (seq !== requestSeqRef.current || !mountedRef.current) return
-
-        // 兼容批量响应 {items, total}：取第一个变体
-        const firstTask = resp.items?.[0]
-        const taskId = firstTask?.task_id || ""
-        setTaskId(taskId)
-        onCreatedRef.current?.(taskId, resp.source_edit_plan_id)
-
-        let completed = false
-
-        // 超时保护
-        timeoutTimerRef.current = setTimeout(() => {
-          if (completed || seq !== requestSeqRef.current || !mountedRef.current) return
-          completed = true
-          clearTimers()
-          setStatus("failed")
-          setError("预览渲染超时（120秒），请重试")
-        }, POLL_TIMEOUT)
-
-        const poll = async () => {
-          if (completed || seq !== requestSeqRef.current || !mountedRef.current) return
-
-          try {
-            const st = await getPreviewStatus(taskId)
-            if (completed || seq !== requestSeqRef.current || !mountedRef.current) return
-
-            if (st.status === "completed" && st.video_url) {
-              completed = true
-              clearTimers()
-              renderedFingerprintRef.current = buildFingerprint(request)
-              setVideoUrl(st.video_url)
-              setProgress(100)
-              setStatus("ready")
-              setError(null)
-              return
-            }
-
-            if (st.status === "failed" || st.status === "cancelled") {
-              completed = true
-              clearTimers()
-              setStatus("failed")
-              setError(
-                st.status === "cancelled"
-                  ? "预览任务已取消"
-                  : st.error_message || "预览渲染失败，请重试",
-              )
-              return
-            }
-
-            // pending / generating
-            if (typeof st.progress === "number") setProgress(st.progress)
-            pollTimerRef.current = setTimeout(poll, POLL_INTERVAL)
-          } catch (pollErr) {
-            if (completed || seq !== requestSeqRef.current || !mountedRef.current) return
-            if (networkRetriesRef.current < MAX_NETWORK_RETRIES) {
-              networkRetriesRef.current += 1
-              console.warn(
-                `[ServerPreview] 轮询网络错误，第 ${networkRetriesRef.current} 次重试`,
-                pollErr,
-              )
-              pollTimerRef.current = setTimeout(poll, POLL_INTERVAL * 2)
-            } else {
-              completed = true
-              clearTimers()
-              setStatus("failed")
-              setError("网络错误，无法获取预览状态，请重试")
-            }
-          }
-        }
-
-        poll()
-      } catch (createErr) {
-        if (seq !== requestSeqRef.current || !mountedRef.current) return
-        console.error("[ServerPreview] 创建预览任务失败:", createErr)
-
-        const isNetworkError =
-          !!(createErr as { request?: unknown })?.request ||
-          (createErr as { code?: string })?.code === "ERR_NETWORK"
-
-        if (isNetworkError && networkRetriesRef.current < MAX_NETWORK_RETRIES) {
-          networkRetriesRef.current += 1
-          console.warn(`[ServerPreview] 创建任务网络错误，第 ${networkRetriesRef.current} 次重试`)
-          setTimeout(() => {
-            if (seq === requestSeqRef.current && mountedRef.current) {
-              createAndPoll(request, seq)
-            }
-          }, POLL_INTERVAL * 2)
-          return
-        }
-
-        const errData = (
-          createErr as { response?: { data?: { detail?: string; message?: string } } }
-        )?.response?.data
-        setStatus("failed")
-        setError(errData?.detail || errData?.message || "预览任务创建失败，请重试")
-      }
-    },
-    [clearTimers],
-  )
-
-  /* ── 手动触发预览 ── */
-  const triggerPreview = useCallback(() => {
-    if (!enabled) return
-    const request = buildRequestRef.current()
-    if (!request.template_id || request.asset_ids.length === 0) return
-
-    clearTimers()
-    const seq = ++requestSeqRef.current
-    setVideoUrl(null)
-    setTaskId(null)
-    createAndPoll(request, seq)
-  }, [enabled, clearTimers, createAndPoll])
-
-  /* ── 自动触发 + 配置变更检测 ── */
-  // 每次 render 都检查最新配置 fingerprint，与已渲染的 fingerprint 比较
-  const request = enabled ? buildRequest() : null
-  const currentFingerprint = request
-    ? request.template_id && request.asset_ids.length > 0
-      ? buildFingerprint(request)
-      : ""
-    : ""
-
-  // 首次进入自动触发
-  const didInitRef = useRef(false)
-  useEffect(() => {
-    if (!enabled || !currentFingerprint) {
-      didInitRef.current = false
-      // 禁用时取消进行中的轮询，避免回到前序步骤后仍在后台轮询
-      requestSeqRef.current += 1
-      clearTimers()
-      return
-    }
-    if (!didInitRef.current) {
-      didInitRef.current = true
-      renderedFingerprintRef.current = currentFingerprint
-      triggerPreview()
-    }
-  }, [enabled, currentFingerprint, triggerPreview, clearTimers])
-
-  // 配置变更检测：素材/配音/BGM 等变化 → 自动重渲染；标题样式变化 → 标记 stale
-  const prevFingerprintRef = useRef(currentFingerprint)
-  useEffect(() => {
-    if (!enabled || !currentFingerprint) return
-    const prev = prevFingerprintRef.current
-    prevFingerprintRef.current = currentFingerprint
-
-    if (!prev || prev === currentFingerprint) return
-    if (currentFingerprint === renderedFingerprintRef.current) return
-
-    // 配置已变更
-    // 判断是标题样式变更还是素材/配音/BGM 变更
-    const prevParsed = JSON.parse(prev) as Record<string, unknown>
-    const currParsed = JSON.parse(currentFingerprint) as Record<string, unknown>
-    const nonTitleChanged =
-      prevParsed.t !== currParsed.t ||
-      prevParsed.a !== currParsed.a ||
-      prevParsed.d !== currParsed.d ||
-      prevParsed.r !== currParsed.r ||
-      prevParsed.v !== currParsed.v ||
-      JSON.stringify(prevParsed.b) !== JSON.stringify(currParsed.b)
-
-    if (nonTitleChanged) {
-      // 素材/配音/BGM/模板等变化 → 自动重新渲染
-      renderedFingerprintRef.current = currentFingerprint
-      triggerPreview()
-    } else {
-      // 仅标题文字/样式变化 → 标记 stale，不自动重渲染（避免频繁请求）
-      // 实时预览由 CSS TitleOverlay 提供
-      setStatus((s) => (s === "ready" ? "stale" : s))
-    }
-  }, [enabled, currentFingerprint, triggerPreview])
-
-  return {
-    status,
-    videoUrl,
-    error,
-    progress,
-    triggerPreview,
-    taskId,
-  }
-}
-
-export default useServerPreview

apps/web/src/pages/generate/hooks/useStep2Materials.ts

@@ -10,6 +10,7 @@ import { updateEditPlanClips, createClipsFromAssets, getEditPlanClips } from "@/
 import { useMaterialLibrary } from "./step2-materials/useMaterialLibrary"
 import { useSmartMatch } from "./step2-materials/useSmartMatch"
 import { useDraftAutoSave } from "./useDraftAutoSave"
+import { isInvalidTemplateError } from "./useGenerateFormState/templateFallback"
 
 interface UseStep2MaterialsProps {
   materialMode: "manual" | "auto"
@@ -24,6 +25,8 @@ interface UseStep2MaterialsProps {
   templateSegments?: TemplateSegment[]
   /** 服务端 clips 创建成功后的回调，用于通知预览播放器 */
   onServerClipsChange?: (clips: EditPlanClip[]) => void
+  /** 当前模板创建片段返回 404/400/422（模板失效）时的自动回退回调（#1777） */
+  onTemplateInvalid?: () => boolean
 }
 
 export function useStep2Materials({
@@ -36,6 +39,7 @@ export function useStep2Materials({
   selectedTemplate,
   templateSegments,
   onServerClipsChange,
+  onTemplateInvalid,
 }: UseStep2MaterialsProps) {
   const {
     libraries,
@@ -102,6 +106,8 @@ export function useStep2Materials({
   selectedTemplateRef.current = selectedTemplate
   const onServerClipsChangeRef = useRef(onServerClipsChange)
   onServerClipsChangeRef.current = onServerClipsChange
+  const onTemplateInvalidRef = useRef(onTemplateInvalid)
+  onTemplateInvalidRef.current = onTemplateInvalid
 
   useEffect(() => {
     const tid = selectedTemplateRef.current
@@ -123,11 +129,12 @@ export function useStep2Materials({
       const requiredClipsCount = segs.length > 0 ? segs.length : undefined
 
       try {
-        // 1. 清空旧片段
-        await updateEditPlanClips(tid, [], controller.signal)
+        // 1. 清空旧片段（静默全局 toast：模板失效时由下方回退统一提示）
+        await updateEditPlanClips(tid, [], controller.signal, true)
         // 2. 调用后端 from-assets 接口创建片段（异步秒级返回，60s 超时仅为兜底）
         await createClipsFromAssets(tid, ids, "main", requiredClipsCount, {
           signal: controller.signal,
+          silentErrorToast: true,
         })
         // 3. 获取服务端生成的 clips（含 start_time/duration），供预览播放器使用
         const clipList = await getEditPlanClips(tid, { limit: 500 })
@@ -146,6 +153,14 @@ export function useStep2Materials({
           message.error("智能选片失败，请重试")
           return
         }
+        // 模板失效（404 模板不存在 / 400/422 无片段配置）：
+        // 清空失效选择并自动切到第一个有效模板 + toast，避免页面卡死无提示（#1777）
+        if (isInvalidTemplateError(err)) {
+          console.warn("[useStep2Materials] 当前模板已失效，触发自动回退:", err)
+          onServerClipsChangeRef.current?.([])
+          onTemplateInvalidRef.current?.()
+          return
+        }
         console.warn("[useStep2Materials] 写入 clips 失败:", err)
       }
     }, 800)

apps/web/src/pages/generate/hooks/useVariantVoicePreview.ts

@@ -0,0 +1,166 @@
+/**
+ * 批量变体配音预览音频解析（#1750）
+ *
+ * 独立配音模式下每个变体挂载各自的配音 URL：
+ * - 配音素材（voice 资产，有 file_url）→ 直接用素材文件 URL；
+ * - AI 音色（预置/克隆，无实体文件）→ 按该变体自己的标题调 /tts/preview 合成；
+ * - 共用模式下所有变体解析为同一条（等价于旧 previewVoiceAudioUrl）。
+ *
+ * N=1 不使用本 hook（单视频配音预览逻辑在 GeneratePage 内保持不变，零回归）。
+ */
+import { useEffect, useRef, useState } from "react"
+import { useQuery } from "@tanstack/react-query"
+import { getAssetsByKind } from "@/api/assets"
+import type { AssetItem } from "@/api/assets"
+import { previewTts } from "@/api/tts"
+
+interface UseVariantVoicePreviewOptions {
+  /** 是否批量模式（count>1） */
+  enabled: boolean
+  /** 变体数量 */
+  count: number
+  /** 是否每个视频独立配音 */
+  perVideo: boolean
+  /** 共用配音 ID（独立模式下为变体 0 的配音） */
+  sharedVoiceId: string
+  /** 克隆音色 ID 覆盖（共用模式，与旧逻辑一致：selectedClonedVoice || selectedVoice） */
+  clonedVoiceId?: string
+  /** 各变体独立配音 ID（独立模式）；长度不足时回退共用 */
+  variantVoiceIds: string[]
+  /** 各变体标题（TTS 合成文案源） */
+  titles: string[]
+}
+
+/** 稳定的空数组常量：避免 useQuery 数据未就绪时每次渲染产生新引用导致 effect 无限触发 */
+const EMPTY_VOICE_MATERIALS: AssetItem[] = []
+
+/** 判断配音 ID 是否对应实体素材（有 file_url）；否则视为 AI 音色需 TTS */
+function findMaterialUrl(id: string, materials: AssetItem[]): string | null {
+  if (!id) return null
+  const m = materials.find((x) => x.id === id)
+  return m?.file_url || null
+}
+
+export function useVariantVoicePreview({
+  enabled,
+  count,
+  perVideo,
+  sharedVoiceId,
+  clonedVoiceId = "",
+  variantVoiceIds,
+  titles,
+}: UseVariantVoicePreviewOptions): (string | null)[] {
+  const [urls, setUrls] = useState<(string | null)[]>([])
+  // 配音素材库：组件内部自取，避免调用方传入不稳定数组引用导致 effect 反复触发
+  const { data: voiceMaterialsData } = useQuery({
+    queryKey: ["assets", "voice"],
+    queryFn: () => getAssetsByKind("voice", { limit: 50 }),
+  })
+  const voiceMaterials: AssetItem[] = voiceMaterialsData ?? EMPTY_VOICE_MATERIALS
+  // 已缓存的 TTS 结果：key = `${voiceId}|${title}`，避免重复合成
+  const ttsCacheRef = useRef<Map<string, string>>(new Map())
+  // 在途请求 AbortController
+  const abortRef = useRef<AbortController | null>(null)
+  const seqRef = useRef(0)
+
+  useEffect(() => {
+    if (!enabled || count <= 1) {
+      setUrls((prev) => (prev.length === 0 ? prev : []))
+      return
+    }
+
+    const seq = ++seqRef.current
+    abortRef.current?.abort()
+    const controller = new AbortController()
+    abortRef.current = controller
+
+    // 每个变体实际使用的配音 ID
+    const voiceIds = Array.from({ length: count }, (_, i) =>
+      perVideo ? variantVoiceIds[i] || sharedVoiceId : sharedVoiceId,
+    )
+
+    // 先用素材 URL 同步填充；AI 音色位置先置 null，待 TTS 完成
+    const result: (string | null)[] = voiceIds.map((id, i) => {
+      const materialUrl = findMaterialUrl(id, voiceMaterials)
+      if (materialUrl) return materialUrl
+      // 共用模式下克隆音色 ID 可能与 selectedVoice 不同（与旧 useEffect 逻辑一致）
+      if (!perVideo && i === 0 && clonedVoiceId) {
+        return findMaterialUrl(clonedVoiceId, voiceMaterials)
+      }
+      return null
+    })
+
+    // 收集需要 TTS 的变体：无素材 URL 且有标题且有音色 ID
+    const ttsJobs: { index: number; voiceId: string; title: string }[] = []
+    voiceIds.forEach((id, i) => {
+      if (result[i]) return
+      // 共用模式沿用旧逻辑：voice_id = selectedClonedVoice || selectedVoice
+      const ttsVoiceId = !perVideo && i === 0 ? clonedVoiceId || id : id
+      const title = titles[i] || ""
+      if (!ttsVoiceId || !title) return
+      ttsJobs.push({ index: i, voiceId: ttsVoiceId, title })
+    })
+
+    setUrls((prev) =>
+      prev.length === result.length && prev.every((v, i) => v === result[i]) ? prev : result,
+    )
+
+    if (ttsJobs.length === 0) return
+
+    let cancelled = false
+    void (async () => {
+      // 串行 TTS，避免瞬间 N 个合成请求打爆后端
+      for (const job of ttsJobs) {
+        const cacheKey = `${job.voiceId}|${job.title}`
+        const cached = ttsCacheRef.current.get(cacheKey)
+        if (cached) {
+          if (seq === seqRef.current) {
+            setUrls((prev) => {
+              if (prev[job.index] === cached) return prev
+              const next = [...prev]
+              next[job.index] = cached
+              return next
+            })
+          }
+          continue
+        }
+        try {
+          // eslint-disable-next-line no-await-in-loop
+          const res = await previewTts({ text: job.title, voice_id: job.voiceId })
+          if (cancelled || controller.signal.aborted || seq !== seqRef.current) return
+          const audioUrl = res.audio_url || ""
+          if (audioUrl) {
+            ttsCacheRef.current.set(cacheKey, audioUrl)
+            setUrls((prev) => {
+              if (prev[job.index] === audioUrl) return prev
+              const next = [...prev]
+              next[job.index] = audioUrl
+              return next
+            })
+          }
+        } catch (err) {
+          if (cancelled || controller.signal.aborted || seq !== seqRef.current) return
+          console.warn(`[变体${job.index + 1}预览配音生成失败]`, err)
+        }
+      }
+    })()
+
+    return () => {
+      cancelled = true
+      controller.abort()
+    }
+  }, [
+    enabled,
+    count,
+    perVideo,
+    sharedVoiceId,
+    clonedVoiceId,
+    variantVoiceIds,
+    titles,
+    voiceMaterials,
+  ])
+
+  return urls
+}
+
+export default useVariantVoicePreview

apps/web/src/pages/generate/utils/calculateTotalVideoDuration.ts

@@ -1,54 +0,0 @@
-/**
- * 共享：根据素材列表和模板片段计算总视频时长
- * GeneratePage（配音校验）和 FrontendPreviewPlayer（播放控制）共用
- */
-
-export interface DurationAsset {
-  id?: string
-  duration?: number
-  metadata?: { duration?: number }
-}
-
-export interface DurationTemplateSegment {
-  duration_min?: number
-  duration_max?: number
-}
-
-/**
- * 计算总视频时长
- * @param assets 素材列表
- * @param template 模板（含 segments）
- * @returns 总时长（秒），无有效数据时返回 0
- */
-export function calculateTotalVideoDuration(
-  assets: DurationAsset[] | undefined,
-  template: { segments?: DurationTemplateSegment[] } | undefined,
-): number {
-  if (!assets || assets.length === 0 || !template) return 0
-
-  const templateSegments = template.segments || []
-
-  return assets.reduce((sum, asset, i) => {
-    const assetDuration = asset.duration || asset.metadata?.duration || 30
-    const tplSeg = templateSegments[i] || templateSegments[templateSegments.length - 1]
-    const segDuration = tplSeg
-      ? Math.min(
-          tplSeg.duration_max ?? assetDuration,
-          Math.max(tplSeg.duration_min ?? 0, assetDuration),
-        )
-      : Math.min(assetDuration, 10)
-    return sum + segDuration
-  }, 0)
-}
-
-/**
- * 估算总视频时长（仅依赖模板 segments）
- * 当素材未加载或加载失败时，用各片段 duration_max 之和作为估算值
- * 确保配音时长校验不会因素材未就绪而跳过
- */
-export function estimateTotalVideoDuration(
-  template: { segments?: DurationTemplateSegment[] } | undefined,
-): number {
-  if (!template?.segments || template.segments.length === 0) return 0
-  return template.segments.reduce((sum, seg) => sum + (seg.duration_max || 0), 0)
-}

apps/web/src/pages/my-templates/components/TemplateCard.tsx

@@ -66,7 +66,7 @@ export const TemplateCard: React.FC<TemplateCardProps> = ({
 
     <div className="mt-card-meta">
       <Text type="secondary" style={{ fontSize: 12 }}>
-        {tpl.segments.length} 片段 · 预估 ~{tpl.estimated_duration}s
+        {tpl.segments.length} 个片段
       </Text>
       {tpl.category && <Tag style={{ fontSize: 11, marginTop: 4 }}>{tpl.category}</Tag>}
     </div>

apps/web/src/pages/my-templates/hooks/useMyTemplates.ts

@@ -57,11 +57,6 @@ export function useMyTemplates() {
         title_config: tpl.title_config,
         subtitle_config: tpl.subtitle_config,
         bgm_config: tpl.bgm_config,
-        estimated_duration:
-          tpl.estimated_duration ??
-          Math.round(
-            tpl.segments.reduce((s, seg) => s + (seg.duration_min + seg.duration_max) / 2, 0),
-          ),
         segments: tpl.segments.map(({ id: _id, ...rest }) => rest),
       }),
     onSuccess: () => {

apps/web/src/pages/templates/TemplateLibrary.tsx

@@ -1,7 +1,7 @@
 /**
  * 模板库页面（升级版）— V21 设计系统
  * 对接后端模板管理 API：
- * - 分页查询（page/page_size/category/keyword/duration_range）
+ * - 分页查询（page/page_size/category/keyword）
  * - 模板详情（素材规则、字幕样式、BGM、比例等参数配置）
  * - 复制模板 / 从模板生成
  * - 卡片网格布局 + 类型筛选 + 搜索 + 收藏
@@ -24,7 +24,6 @@ const TemplateLibrary: React.FC = () => {
     error,
     searchText,
     activeType,
-    durationRange,
     page,
     pageSize,
     setPage,
@@ -34,7 +33,6 @@ const TemplateLibrary: React.FC = () => {
     handleCreate,
     handleSearchChange,
     handleCategoryChange,
-    handleDurationChange,
   } = useTemplateLibrary()
 
   const {
@@ -62,8 +60,6 @@ const TemplateLibrary: React.FC = () => {
         onSearchChange={handleSearchChange}
         activeType={activeType}
         onTypeChange={handleCategoryChange}
-        durationRange={durationRange}
-        onDurationChange={handleDurationChange}
       />
 
       {/* 模板展示区 */}
@@ -77,7 +73,6 @@ const TemplateLibrary: React.FC = () => {
         errorMessage={error?.message}
         searchText={searchText}
         activeType={activeType}
-        durationRange={durationRange}
         onPageChange={setPage}
         onPreview={handlePreview}
         onToggleFavorite={toggleFavorite}

apps/web/src/pages/templates/components/template-library/TemplateCard.tsx

@@ -1,7 +1,7 @@
 import React from "react"
 import { Tag } from "antd"
 import type { TemplateItem } from "@/api/templates"
-import { gradientForCategory, getTypeColor, formatDuration } from "../../utils/templateLibrary"
+import { gradientForCategory, getTypeColor } from "../../utils/templateLibrary"
 
 interface TemplateCardProps {
   template: TemplateItem
@@ -37,7 +37,7 @@ export const TemplateCard: React.FC<TemplateCardProps> = ({
         <div className="xx-template-thumb-name">{template.name}</div>
         <div className="xx-template-thumb-meta">
           <span className="xx-template-thumb-duration">
-            {formatDuration(template.estimated_duration ?? template.target_duration)}
+            {template.clip_count || template.segments?.length || 0} 个片段
           </span>
         </div>
         <div className="xx-template-preview-hint">点击查看详情</div>

apps/web/src/pages/templates/components/template-library/TemplateDetailModal.tsx

@@ -5,9 +5,8 @@ import PreviewArea from "./template-detail-modal/PreviewArea"
 import SegmentList from "./template-detail-modal/SegmentList"
 import StyleConfig from "./template-detail-modal/StyleConfig"
 import DetailFooter from "./template-detail-modal/DetailFooter"
-import { getTypeColor, formatDuration } from "../../utils/templateLibrary"
+import { getTypeColor } from "../../utils/templateLibrary"
 import { TEMPLATE_TYPES } from "../../constants/templateLibrary"
-import { calcTotalSegmentDuration } from "../../utils/templateLibrary"
 
 export const TemplateDetailModal: React.FC<TemplateDetailModalProps> = ({
   template,
@@ -18,7 +17,6 @@ export const TemplateDetailModal: React.FC<TemplateDetailModalProps> = ({
   onCopy,
 }) => {
   const segments = template.segments ?? []
-  const totalSegmentDuration = calcTotalSegmentDuration(segments)
   const typeInfo = TEMPLATE_TYPES.find((t) => t.type === template.category)
 
   return (
@@ -64,11 +62,6 @@ export const TemplateDetailModal: React.FC<TemplateDetailModalProps> = ({
             size="small"
             className="xx-template-modal-desc-table"
             items={[
-              {
-                key: "duration",
-                label: "目标时长",
-                children: formatDuration(template.estimated_duration ?? template.target_duration),
-              },
               {
                 key: "clips",
                 label: "片段数量",
@@ -87,7 +80,7 @@ export const TemplateDetailModal: React.FC<TemplateDetailModalProps> = ({
             ]}
           />
 
-          <SegmentList segments={segments} totalDuration={totalSegmentDuration} />
+          <SegmentList segments={segments} />
           <StyleConfig template={template} />
           <DetailFooter
             template={template}

apps/web/src/pages/templates/components/template-library/TemplateGrid.tsx

@@ -14,7 +14,6 @@ interface TemplateGridProps {
   errorMessage?: string
   searchText: string
   activeType: string
-  durationRange: string
   onPageChange: (page: number) => void
   onPreview: (template: TemplateItem) => void
   onToggleFavorite: (id: string, e: React.MouseEvent) => void
@@ -31,7 +30,6 @@ export const TemplateGrid: React.FC<TemplateGridProps> = ({
   errorMessage,
   searchText,
   activeType,
-  durationRange,
   onPageChange,
   onPreview,
   onToggleFavorite,
@@ -64,7 +62,7 @@ export const TemplateGrid: React.FC<TemplateGridProps> = ({
 
   // 空状态
   if (templates.length === 0) {
-    const hasFilter = !!searchText || activeType !== "全部" || !!durationRange
+    const hasFilter = !!searchText || activeType !== "全部"
     return (
       <div className="xx-templates-empty">
         <div className="xx-templates-empty-icon">

apps/web/src/pages/templates/components/template-library/TemplateToolbar.tsx

@@ -1,15 +1,13 @@
 import React from "react"
 import { SearchOutlined } from "@ant-design/icons"
-import type { EditTemplateType, DurationRange } from "../../types/templateLibrary"
-import { TEMPLATE_TYPES, DURATION_OPTIONS } from "../../constants/templateLibrary"
+import type { EditTemplateType } from "../../types/templateLibrary"
+import { TEMPLATE_TYPES } from "../../constants/templateLibrary"
 
 interface TemplateToolbarProps {
   searchText: string
   onSearchChange: (e: React.ChangeEvent<HTMLInputElement>) => void
   activeType: EditTemplateType | "全部"
   onTypeChange: (type: EditTemplateType | "全部") => void
-  durationRange: DurationRange
-  onDurationChange: (value: DurationRange) => void
 }
 
 export const TemplateToolbar: React.FC<TemplateToolbarProps> = ({
@@ -17,8 +15,6 @@ export const TemplateToolbar: React.FC<TemplateToolbarProps> = ({
   onSearchChange,
   activeType,
   onTypeChange,
-  durationRange,
-  onDurationChange,
 }) => {
   return (
     <div className="xx-templates-toolbar">
@@ -46,18 +42,8 @@ export const TemplateToolbar: React.FC<TemplateToolbarProps> = ({
           </button>
         ))}
       </div>
-      {/* 时长筛选 */}
-      <div className="xx-templates-duration-filter">
-        {DURATION_OPTIONS.map((opt) => (
-          <button
-            key={opt.value}
-            className={`xx-templates-duration-btn${durationRange === opt.value ? " active" : ""}`}
-            onClick={() => onDurationChange(opt.value)}
-          >
-            {opt.label}
-          </button>
-        ))}
-      </div>
     </div>
   )
 }
+
+export default TemplateToolbar