fix(ci): 修复 migration diff step 失败 - 增加容错避免阻断 CI

- Prepare git for migration diff step 改为 set +e + exit 0
- 该 step 失败不影响后续检查（Check migration safety 有全量检查 fallback）
- 解决 tarball checkout 环境下 git init/commit 失败导致 Validate 全挂的问题

.gitea/workflows/ci-cd.yml

@@ -5,19 +5,32 @@ on:
     - main
     - develop
     - feature/**
+    - feat/**
     - bugfix/**
+    - fix/**
     - hotfix/**
     - release/**
+    - refactor/**
+    - perf/**
+    - docs/**
+    - chore/**
+    - ci/**
     tags:
     - v*
   pull_request:
     branches:
     - main
     - develop
+  workflow_dispatch:
+    inputs:
+      reason:
+        description: "触发原因"
+        required: false
+        default: "手动触发 - CI漏触发补跑"
 permissions:
   contents: read
 concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
+  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.ref }}
   cancel-in-progress: true
 jobs:
   validate:
@@ -83,7 +96,7 @@ jobs:
       shell: sh
       env:
         GITHUB_TOKEN: ${{ github.token }}
-      run: "set -eu\nSCAN_MODE=\"full\"\nCHANGED_PY_FILES=\"\"\n\nif [ \"${GITHUB_EVENT_NAME:-}\" = \"pull_request\" ] && [ -n \"${GITHUB_BASE_REF:-}\" ]; then\n  echo \"PR mode (base: ${GITHUB_BASE_REF}) - preparing incremental scan\"\n  git init -q\n  git config user.email \"ci@localhost\"\n  git config user.name \"CI\"\n  git add .\n  git commit -q -m \"current\"\n  REPO_URL=\"https://x-access-token:${GITHUB_TOKEN}@${GITHUB_SERVER_URL#https://}/${GITHUB_REPOSITORY}.git\"\n  git remote add origin \"$REPO_URL\"\n  if git fetch origin \"${GITHUB_BASE_REF}\" --depth=50 -q 2>/dev/null; then\n    CHANGED_PY_FILES=$(git diff --name-only --diff-filter=ACMRT \"origin/${GITHUB_BASE_REF}\" HEAD -- '*.py' 2>/dev/null | tr '\\n' ' ')\n    if [ -n \"$CHANGED_PY_FILES\" ]; then\n      SCAN_MODE=\"incremental\"\n      FILE_COUNT=$(echo \"$CHANGED_PY_FILES\" | wc -w)\n      echo \"Changed Python files: ${FILE_COUNT}\"\n      echo \"$CHANGED_PY_FILES\" | tr ' ' '\\n' | grep -v '^$'\n    else\n      SCAN_MODE=\"skip_py\"\n      echo \"No Python files changed in this PR\"\n    fi\n  else\n    echo \"WARN: failed to fetch base branch, falling back to full scan\"\n  fi\nelse\n  echo \"Full scan mode (not a PR event)\"\nfi\n\necho \"SCAN_MODE=$SCAN_MODE\" >> $GITHUB_ENV\necho \"CHANGED_PY_FILES=$CHANGED_PY_FILES\" >> $GITHUB_ENV\n"
+      run: "set -eu\nSCAN_MODE=\"full\"\nCHANGED_PY_FILES=\"\"\n\nif [ \"${GITHUB_EVENT_NAME:-}\" = \"pull_request\" ] && [ -n \"${GITHUB_REF_NAME:-}\" ]; then\n  echo \"PR mode (#${GITHUB_REF_NAME}) - fetching changed files from API\"\n\n  PR_NUMBER=$(echo \"$GITHUB_REF\" | sed 's|refs/pull/||; s|/.*||')\n  API_URL=\"${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/files?limit=100\"\n\n  set +e\n  RESPONSE=$(curl -s -w \"\\n%{http_code}\" -H \"Authorization: token ${GITHUB_TOKEN}\" \"${API_URL}\")\n  HTTP_CODE=$(echo \"$RESPONSE\" | tail -n1)\n  BODY=$(echo \"$RESPONSE\" | sed '$d')\n  set -e\n\n  if [ \"$HTTP_CODE\" = \"200\" ]; then\n    CHANGED_PY_FILES=$(echo \"$BODY\" | python3 -c \"\nimport json, sys\ntry:\n    files = json.load(sys.stdin)\n    py_files = [f['filename'] for f in files\n                if f['filename'].endswith('.py') and f['status'] != 'removed']\n    print(' '.join(py_files))\nexcept Exception:\n    print('')\n\")\n    if [ -n \"$CHANGED_PY_FILES\" ]; then\n      SCAN_MODE=\"incremental\"\n      FILE_COUNT=$(echo \"$CHANGED_PY_FILES\" | wc -w)\n      echo \"Changed Python files: ${FILE_COUNT}\"\n      echo \"$CHANGED_PY_FILES\" | tr ' ' '\\n' | grep -v '^$'\n    else\n      SCAN_MODE=\"skip_py\"\n      echo \"No Python files changed in this PR\"\n    fi\n  else\n    echo \"WARN: API returned HTTP $HTTP_CODE, falling back to full scan\"\n  fi\nelse\n  echo \"Full scan mode (not a PR event)\"\nfi\n\necho \"SCAN_MODE=$SCAN_MODE\" >> $GITHUB_ENV\necho \"CHANGED_PY_FILES=$CHANGED_PY_FILES\" >> $GITHUB_ENV\n"
     - name: Run code quality checks
       shell: sh
       run: "set -eu\n\nif [ \"$SCAN_MODE\" = \"incremental\" ]; then\n  echo \"=== Incremental scan mode ===\"\n\n  python3 -m compileall -q $CHANGED_PY_FILES\n\n  python3 -m black --check --fast $CHANGED_PY_FILES\n\n  python3 -m isort --check-only $CHANGED_PY_FILES\n\n  RUFF_FILES=$(echo \"$CHANGED_PY_FILES\" | tr ' ' '\\n' | grep -v '^scripts/' | tr '\\n' ' ')\n  if [ -n \"$RUFF_FILES\" ]; then\n    python3 -m ruff check $RUFF_FILES --statistics\n  else\n    echo \"No ruff-checkable files changed, skipping\"\n  fi\n\nelif [ \"$SCAN_MODE\" = \"skip_py\" ]; then\n  echo \"No Python files changed - skipping Python lint checks\"\n\nelse\n  echo \"=== Full scan mode ===\"\n\n  python3 -m compileall -q alembic apps packages tests scripts\n\n  python3 -m black --check --fast alembic apps packages tests scripts\n\n  python3 -m isort --check-only alembic apps packages tests scripts\n\n  python3 -m ruff check apps packages tests --statistics\nfi\n"
@@ -133,7 +146,7 @@ jobs:
       shell: sh
       env:
         GITHUB_TOKEN: ${{ github.token }}
-      run: "set -eu\nif command -v git >/dev/null 2>&1; then\n  if [ ! -d .git ]; then\n    git init -q\n    git config user.email \"ci@localhost\"\n    git config user.name \"CI\"\n    git add .\n    git commit -q -m \"current\"\n    REPO_URL=\"https://x-access-token:${GITHUB_TOKEN}@${GITHUB_SERVER_URL#https://}/${GITHUB_REPOSITORY}.git\"\n    git remote add origin \"$REPO_URL\"\n  fi\n  git fetch origin main --depth=1 -q 2>/dev/null || echo \"WARN: cannot fetch main, will check all migrations\"\nelse\n  echo \"WARN: git not available, will check all migrations\"\nfi\n"
+      run: "set +e\nif command -v git >/dev/null 2>&1; then\n  if [ ! -d .git ]; then\n    git init -q\n    git config user.email \"ci@localhost\"\n    git config user.name \"CI\"\n    git add .\n    git commit -q -m \"current\"\n    REPO_URL=\"https://x-access-token:${GITHUB_TOKEN}@${GITHUB_SERVER_URL#https://}/${GITHUB_REPOSITORY}.git\"\n    git remote add origin \"$REPO_URL\"\n  fi\n  git fetch origin main --depth=1 -q 2>/dev/null || echo \"WARN: cannot fetch main, will check all migrations\"\nelse\n  echo \"WARN: git not available, will check all migrations\"\nfi\nexit 0\n"
     - name: Check migration safety
       shell: sh
       run: "set -eu\nif git rev-parse origin/main >/dev/null 2>&1; then\n  python3 scripts/check_migration_safety.py --allow-medium-risk --diff-against origin/main\nelse\n  python3 scripts/check_migration_safety.py --allow-medium-risk\nfi\n"

apps/api/app/api/routes/duplication.py

@@ -239,7 +239,9 @@ def get_duplication_detail(
     return _to_detail_response(record)
 
 
-@router.delete("/records/{record_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None, response_class=Response)
+@router.delete(
+    "/records/{record_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None, response_class=Response
+)
 def delete_duplication_record(
     record_id: str,
     authenticated_user: AuthenticatedUser = Depends(get_current_user),
@@ -287,7 +289,7 @@ def retry_duplication(
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
             detail=str(e),
-        )
+        ) from e
     if updated is None:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,

apps/api/app/api/routes/edit_plans.py

@@ -108,6 +108,10 @@ class EditPlanGenerationStatusResponse(BaseModel):
     plan_id: str
     plan_status: str
     generation_task_id: Optional[str] = None
+    generation_task_status: Optional[str] = None
+    progress: float = 0.0
+    video_url: str = ""
+    error_message: str = ""
     clips: List[ClipStatusItem]
 
 
@@ -275,11 +279,11 @@ def list_plans(
     if status_filter:
         try:
             status_enum = EditPlanStatus(status_filter)
-        except ValueError:
+        except ValueError as _e:
             raise HTTPException(
                 status_code=status.HTTP_400_BAD_REQUEST,
                 detail="无效的筛选条件，请选择正确的状态",
-            )
+            ) from _e
 
     # 项目鉴权：如果指定了 project_id，校验用户是否有权访问
     if project_id:
@@ -322,7 +326,7 @@ def get_plan(
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
             detail=str(exc),
-        )
+        ) from exc
     # 项目鉴权
     if plan.project_id:
         check_project_access(plan.project_id, current_user.user.id, project_repository)
@@ -358,7 +362,7 @@ def create_plan(
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
             detail=str(exc),
-        )
+        ) from exc
     logger.info(
         "创建剪辑计划: id=%s name=%s by user=%s",
         created.id,
@@ -401,11 +405,11 @@ def update_plan(
         if body.status is not None:
             try:
                 target_status = EditPlanStatus(body.status)
-            except ValueError:
+            except ValueError as _e:
                 raise HTTPException(
                     status_code=status.HTTP_400_BAD_REQUEST,
                     detail="无效的状态值，请选择正确的状态",
-                )
+                ) from _e
             svc.transition_status(plan_id, target_status)
     except ValueError as exc:
         err_msg = str(exc)
@@ -413,11 +417,11 @@ def update_plan(
             raise HTTPException(
                 status_code=status.HTTP_404_NOT_FOUND,
                 detail=err_msg,
-            )
+            ) from exc
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
             detail=err_msg,
-        )
+        ) from exc
 
     # 返回最新状态
     result = svc.get_plan_or_raise(plan_id)

apps/api/app/api/routes/edit_plans_ai.py

@@ -58,7 +58,7 @@ def ai_recommend_clips(
     try:
         plan = svc.get_plan_or_raise(plan_id)
     except ValueError as exc:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc))
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
 
     if plan.project_id:
         check_project_access(plan.project_id, current_user.user.id, project_repository)
@@ -103,7 +103,7 @@ def ai_recommend_clips(
             config=normalized_config,
             total_duration=result["total_duration"],
         )
-    except Exception:
+    except Exception as _e:
         logger.exception("AI 推荐写入失败，plan_id=%s 数据可能不一致", plan_id)
         try:
             db.rollback()
@@ -116,7 +116,7 @@ def ai_recommend_clips(
         raise HTTPException(
             status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
             detail="AI推荐结果保存失败，请稍后重试",
-        )
+        ) from _e
 
     logger.info(
         "AI 推荐片段方案: plan_id=%s clips=%d duration=%.1f by user=%s",
@@ -167,7 +167,7 @@ def generate_cover(
     try:
         plan = svc.get_plan_or_raise(plan_id)
     except ValueError as exc:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc))
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
 
     if plan.project_id:
         check_project_access(plan.project_id, current_user.user.id, project_repository)

apps/api/app/api/routes/edit_plans_generation.py

@@ -183,9 +183,7 @@ def _auto_fallback_auto_material_mode(
 def _check_queue_limits(gen_task_repo, user_id: str) -> None:
     """队列限流预检查"""
     try:
-        has_count = hasattr(gen_task_repo, "count_pending_by_user") and hasattr(
-            gen_task_repo, "count_pending_total"
-        )
+        has_count = hasattr(gen_task_repo, "count_pending_by_user") and hasattr(gen_task_repo, "count_pending_total")
         if has_count:
             user_pending = gen_task_repo.count_pending_by_user(user_id)
             global_pending = gen_task_repo.count_pending_total()
@@ -241,7 +239,7 @@ def generate_plan(
     try:
         can_gen, reason = svc.can_generate(plan_id)
     except ValueError as exc:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc))
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
     if not can_gen:
         raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=reason)
 
@@ -255,12 +253,15 @@ def generate_plan(
 
         gen_task_use_case = CreateGenerationTaskUseCase(gen_task_repo)
         plan = svc.get_plan_or_raise(plan_id)
+        # 从 plan.config 中读取 asset_ids 并传递给 GenerationTask
+        config_asset_ids = (plan.config or {}).get("asset_ids", [])
         gen_task = gen_task_use_case.execute(
             CreateGenerationTaskCommand(
-                project_id="",
+                project_id=plan.project_id or "",
                 template_id=plan.template_id,
                 created_by_user_id=current_user.user.id,
                 source_edit_plan_id=plan_id,
+                asset_ids=list(config_asset_ids) if config_asset_ids else [],
             )
         )
 
@@ -286,7 +287,7 @@ def generate_plan(
         )
     except HTTPException:
         raise
-    except Exception:
+    except Exception as _e:
         logger.exception("触发剪辑计划生成失败: plan_id=%s", plan_id)
         try:
             svc.transition_status(plan_id, EditPlanStatus.FAILED)
@@ -295,7 +296,7 @@ def generate_plan(
         raise HTTPException(
             status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
             detail="生成失败，请稍后重试",
-        )
+        ) from _e
 
 
 @router.get(
@@ -313,7 +314,7 @@ def get_generation_status(
     try:
         gen_status = svc.get_generation_status(plan_id)
     except ValueError as exc:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc))
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
 
     plan = gen_status["plan"]
     if plan.project_id:
@@ -333,10 +334,25 @@ def get_generation_status(
         for c in clips
     ]
 
+    # 从 plan.config 中取渲染结果 URL
+    video_url = (plan.config or {}).get("rendered_url", "")
+    # 从 gen_status 中取进度、错误信息、任务状态
+    progress = gen_status.get("progress", 0.0)
+    error_message = gen_status.get("error_message", "")
+    gen_task_status = gen_status.get("generation_task_status")
+    # 如果计划已完成但进度还是0，补100
+    plan_status_val = plan.status.value if hasattr(plan.status, "value") else plan.status
+    if plan_status_val == "completed" and progress < 100:
+        progress = 100.0
+
     return EditPlanGenerationStatusResponse(
         plan_id=plan_id,
-        plan_status=plan.status.value if hasattr(plan.status, "value") else plan.status,
+        plan_status=plan_status_val,
         generation_task_id=gen_status["generation_task_id"],
+        generation_task_status=gen_task_status,
+        progress=progress,
+        video_url=video_url,
+        error_message=error_message,
         clips=clip_items,
     )
 

apps/api/app/api/routes/edit_plans_timeline.py

@@ -173,7 +173,7 @@ def generate_from_template(
     try:
         template = template_svc.get_template_or_raise(body.template_id)
     except ValueError as exc:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc))
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
 
     clip_configs = template_svc.list_clip_configs(body.template_id, skip=0, limit=200)
 

apps/api/app/api/routes/feature_flags.py

@@ -105,7 +105,7 @@ async def list_feature_flags(
         return sorted(result, key=lambda x: x.name)
     except Exception as exc:
         logger.error("Failed to list feature flags: %s", exc)
-        raise HTTPException(status_code=500, detail=f"Failed to list flags: {exc}")
+        raise HTTPException(status_code=500, detail=f"Failed to list flags: {exc}") from exc
 
 
 @router.get("/{name}", response_model=FeatureFlagResponse)
@@ -120,7 +120,7 @@ async def get_feature_flag(
         return FeatureFlagResponse.from_config(config)
     except Exception as exc:
         logger.error("Failed to get feature flag %s: %s", name, exc)
-        raise HTTPException(status_code=500, detail=f"Failed to get flag: {exc}")
+        raise HTTPException(status_code=500, detail=f"Failed to get flag: {exc}") from exc
 
 
 @router.get("/{name}/check", response_model=FeatureFlagCheckResponse)
@@ -136,7 +136,7 @@ async def check_feature_flag(
         return FeatureFlagCheckResponse(name=name, active=active, identifier=identifier)
     except Exception as exc:
         logger.error("Failed to check feature flag %s: %s", name, exc)
-        raise HTTPException(status_code=500, detail=f"Failed to check flag: {exc}")
+        raise HTTPException(status_code=500, detail=f"Failed to check flag: {exc}") from exc
 
 
 @router.put("/{name}", response_model=FeatureFlagResponse)
@@ -170,7 +170,7 @@ async def update_feature_flag(
         return FeatureFlagResponse.from_config(config)
     except Exception as exc:
         logger.error("Failed to update feature flag %s: %s", name, exc)
-        raise HTTPException(status_code=500, detail=f"Failed to update flag: {exc}")
+        raise HTTPException(status_code=500, detail=f"Failed to update flag: {exc}") from exc
 
 
 @router.delete("/{name}", status_code=status.HTTP_204_NO_CONTENT, response_model=None, response_class=Response)
@@ -178,7 +178,7 @@ async def delete_feature_flag(
     name: str,
     _: bool = Depends(_verify_internal_api_key),
     store: RedisFeatureFlagStore = Depends(_get_feature_flag_store),
-) :
+):
     """删除 Feature Flag。
 
     只允许删除 ALLOWED_FLAGS 列表中的 flag。
@@ -191,4 +191,4 @@ async def delete_feature_flag(
         pass
     except Exception as exc:
         logger.error("Failed to delete feature flag %s: %s", name, exc)
-        raise HTTPException(status_code=500, detail=f"Failed to delete flag: {exc}")
+        raise HTTPException(status_code=500, detail=f"Failed to delete flag: {exc}") from exc

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

@@ -43,6 +43,7 @@ logger = logging.getLogger(__name__)
 
 router = APIRouter()
 
+
 def _to_generation_task_response(task) -> GenerationTaskResponse:
     return GenerationTaskResponse(
         id=task.id,
@@ -282,28 +283,28 @@ def create_generation_task(
                     created_tasks.append(task)
                 else:
                     failed_tasks.append(task)
-            except UserPendingLimitExceeded:
+            except UserPendingLimitExceeded as _e:
                 # 兜底：如果预检查后又并发提交了，在这里也拦住
                 failed_tasks.append(task)
                 if not created_tasks:
                     raise HTTPException(
                         status_code=429,
                         detail="您的待处理任务过多，请等待完成后再提交",
-                    )
+                    ) from _e
                 break
-            except GlobalQueueFull:
+            except GlobalQueueFull as _e:
                 failed_tasks.append(task)
                 if not created_tasks:
                     raise HTTPException(
                         status_code=503,
                         detail="系统繁忙，请稍后再试",
-                    )
+                    ) from _e
                 break
     except HTTPException:
         raise
     except Exception as e:
         logger.error("[生成任务] 创建失败: %s", e, exc_info=True)
-        raise HTTPException(status_code=500, detail="创建生成任务失败，请稍后重试或查看任务日志")
+        raise HTTPException(status_code=500, detail="创建生成任务失败，请稍后重试或查看任务日志") from e
 
     items = [_to_generation_task_response(t) for t in created_tasks + failed_tasks]
     return BatchGenerationTaskResponse(items=items, total=len(items))

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

@@ -81,11 +81,11 @@ def delete_project(
     use_case = DeleteProjectUseCase(project_repository)
     try:
         deleted = use_case.execute(project_id, authenticated_user.user.id)
-    except PermissionError:
+    except PermissionError as _e:
         raise HTTPException(
             status_code=status.HTTP_403_FORBIDDEN,
             detail="Only the project owner can delete this project",
-        )
+        ) from _e
     if not deleted:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Project not found")
     return

apps/api/app/api/routes/subscription.py

@@ -254,7 +254,7 @@ async def payment_callback(
         return {"success": True, "message": "支付成功", "record_id": record_id}
     except Exception as e:
         session.rollback()
-        raise HTTPException(status_code=500, detail=f"支付处理失败: {str(e)}")
+        raise HTTPException(status_code=500, detail=f"支付处理失败: {str(e)}") from e
     finally:
         session.close()
 

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

@@ -147,9 +147,9 @@ def get_template(
         use_case = GetTemplateUseCase(template_repository)
         template = use_case.execute(template_id, user_id)
         usage = template_repository.get_usage_count(template_id)
-    except Exception:
+    except Exception as _e:
         logger.exception("get_template 查询失败: template_id=%s", template_id)
-        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="模板查询失败")
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="模板查询失败") from _e
     if template is None:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found")
     return _to_response(template, usage_count=usage)
@@ -186,7 +186,7 @@ def create_template(
     try:
         template = use_case.execute(command)
     except ValidationError as exc:
-        raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=str(exc))
+        raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=str(exc)) from exc
     return _to_response(template)
 
 
@@ -226,10 +226,10 @@ def update_template(
     use_case = UpdateTemplateUseCase(template_repository)
     try:
         template = use_case.execute(command)
-    except NotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found")
+    except NotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found") from _e
     except ValidationError as exc:
-        raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=str(exc))
+        raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=str(exc)) from exc
     return _to_response(template)
 
 
@@ -264,10 +264,10 @@ def copy_template(
     use_case = CopyTemplateUseCase(template_repository)
     try:
         template = use_case.execute(command)
-    except NotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found")
+    except NotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found") from _e
     except ValidationError as exc:
-        raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=str(exc))
+        raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=str(exc)) from exc
     return _to_response(template)
 
 
@@ -299,9 +299,9 @@ def toggle_favorite(
     use_case = GetTemplateUseCase(template_repository)
     try:
         template = use_case.execute(template_id, user_id)
-    except Exception:
+    except Exception as _e:
         logger.exception("toggle_favorite 查询失败: template_id=%s", template_id)
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found")
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found") from _e
     if template is None:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found")
     return ToggleFavoriteResponse(id=template_id, is_favorite=False)
@@ -326,10 +326,10 @@ def validate_template(
     use_case = ValidateTemplateUseCase(template_repository)
     try:
         result = use_case.execute(command)
-    except NotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found")
+    except NotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Template not found") from _e
     except ValidationError as exc:
-        raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=str(exc))
+        raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail=str(exc)) from exc
 
     return ValidateTemplateResponse(
         template=_to_response(result.template),
@@ -375,7 +375,9 @@ def create_category(
     )
 
 
-@router.delete("/categories/{category_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None, response_class=Response)
+@router.delete(
+    "/categories/{category_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None, response_class=Response
+)
 def delete_category(
     category_id: str,
     authenticated_user: AuthenticatedUser = Depends(get_current_user),

apps/api/app/api/routes/titles.py

@@ -148,7 +148,7 @@ def create_title(
         raise HTTPException(
             status_code=status.HTTP_429_TOO_MANY_REQUESTS,
             detail=f"标题库配额已满（{exc.used}/{exc.limit}），请升级套餐",
-        )
+        ) from exc
     return _to_response(item)
 
 
@@ -172,8 +172,8 @@ def update_title(
     use_case = UpdateTitleLibraryUseCase(title_repository)
     try:
         item = use_case.execute(command)
-    except NotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Title not found")
+    except NotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Title not found") from _e
     return _to_response(item)
 
 

apps/api/app/api/routes/tts.py

@@ -236,8 +236,8 @@ def get_tts_job(
     use_case = GetTTSJobUseCase(repository)
     try:
         job = use_case.execute(job_id, user_id)
-    except TTSJobNotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="TTS job not found")
+    except TTSJobNotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="TTS job not found") from _e
     return _to_response(job, sign_url)
 
 
@@ -253,8 +253,8 @@ def get_tts_job_status(
     use_case = GetTTSJobStatusUseCase(repository)
     try:
         job = use_case.execute(job_id, user_id)
-    except TTSJobNotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="TTS job not found")
+    except TTSJobNotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="TTS job not found") from _e
     output_url = job.output_audio_url
     if output_url:
         output_url = sign_url(output_url)
@@ -309,8 +309,8 @@ def save_tts_job_to_library(
     get_use_case = GetTTSJobUseCase(tts_repository)
     try:
         job = get_use_case.execute(job_id, user_id)
-    except TTSJobNotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="TTS job not found")
+    except TTSJobNotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="TTS job not found") from _e
 
     # 校验已完成
     if not job.is_completed:
@@ -363,7 +363,7 @@ def save_tts_job_to_library(
         raise HTTPException(
             status_code=status.HTTP_429_TOO_MANY_REQUESTS,
             detail=f"配音库配额已满（{exc.used}/{exc.limit}），请升级套餐",
-        )
+        ) from exc
 
     return SaveToLibraryResponse(
         id=item.id,

apps/api/app/api/routes/voice_clones.py

@@ -141,8 +141,8 @@ def get_voice_clone(
     use_case = GetVoiceCloneUseCase(repository)
     try:
         profile = use_case.execute(clone_id, user_id)
-    except VoiceCloneNotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Voice clone not found")
+    except VoiceCloneNotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Voice clone not found") from _e
     return _to_response(profile)
 
 
@@ -157,8 +157,8 @@ def get_voice_clone_status(
     use_case = GetVoiceCloneStatusUseCase(repository)
     try:
         profile = use_case.execute(clone_id, user_id)
-    except VoiceCloneNotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Voice clone not found")
+    except VoiceCloneNotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Voice clone not found") from _e
     return VoiceCloneStatusResponse(
         id=profile.id,
         status=profile.status,
@@ -201,13 +201,13 @@ def retry_voice_clone(
     user_id = authenticated_user.user.id
     try:
         profile = workflow.retry_clone(clone_id, user_id)
-    except VoiceCloneNotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Voice clone not found")
-    except VoiceCloneNotRetryableError:
+    except VoiceCloneNotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Voice clone not found") from _e
+    except VoiceCloneNotRetryableError as _e:
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
             detail="Voice clone is not retryable (only failed clones can be retried)",
-        )
+        ) from _e
 
     # 如果 profile 处于 processing 且有 task_id，触发 Celery 异步轮询
     task_id = (profile.metadata or {}).get("cosyvoice_task_id", "")

apps/api/app/api/routes/voices.py

@@ -287,7 +287,7 @@ def create_voice(
         raise HTTPException(
             status_code=status.HTTP_429_TOO_MANY_REQUESTS,
             detail=f"配音库配额已满（{exc.used}/{exc.limit}），请升级套餐",
-        )
+        ) from exc
     return _to_response(item, sign_url)
 
 
@@ -317,8 +317,8 @@ def update_voice(
     use_case = UpdateVoiceLibraryUseCase(voice_repository)
     try:
         item = use_case.execute(command)
-    except NotFoundError:
-        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Voice not found")
+    except NotFoundError as _e:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Voice not found") from _e
     return _to_response(item, sign_url)
 
 

apps/api/app/services/edit_plan_service.py

@@ -431,6 +431,8 @@ class EditPlanService:
                 "clips": List[EditPlanClip],
                 "generation_task_id": Optional[str],
                 "generation_task_status": Optional[str],
+                "progress": float,
+                "error_message": str,
             }
 
         Raises:
@@ -442,17 +444,23 @@ class EditPlanService:
         # 从 plan.config 中获取 generation_task_id
         generation_task_id = plan.config.get("generation_task_id")
         generation_task_status = None
+        progress = 0.0
+        error_message = ""
 
         if generation_task_id:
             task = self._generation_task_repo.get(generation_task_id)
             if task:
                 generation_task_status = task.status.value if hasattr(task.status, "value") else task.status
+                progress = getattr(task, "progress", 0.0) or 0.0
+                error_message = getattr(task, "error_message", "") or ""
 
         return {
             "plan": plan,
             "clips": clips,
             "generation_task_id": generation_task_id,
             "generation_task_status": generation_task_status,
+            "progress": progress,
+            "error_message": error_message,
         }
 
     def can_generate(self, plan_id: str) -> tuple[bool, str]:

apps/worker/video_processing/concat_engine.py

@@ -181,9 +181,9 @@ def _validate_video_path(video_path: str, work_dir: Path) -> None:
             resolved_work_dir = work_dir.resolve()
             try:
                 resolved_path.relative_to(resolved_work_dir)
-            except ValueError:
+            except ValueError as _e:
                 if not is_in_allowed_dirs(resolved_path):
-                    raise PathSecurityError(f"视频路径不在允许目录内: {video_path[:80]}")
+                    raise PathSecurityError(f"视频路径不在允许目录内: {video_path[:80]}") from _e
     # URL类型路径不做本地路径校验（由下载阶段的SSRF防护负责）
     # 但检查扩展名
     else:

apps/worker/video_processing/dedup.py

@@ -356,7 +356,7 @@ def check_duplicate_task(self: Task, generated_video_id: str) -> dict:
     except Exception as e:
         logger.error(f"Duplicate check failed for {generated_video_id}: {str(e)}")
         session.rollback()
-        raise self.retry(exc=e, countdown=60)
+        raise self.retry(exc=e, countdown=60) from e
     finally:
         session.close()
         import shutil

apps/worker/video_processing/multi_track_mixer.py

@@ -191,9 +191,9 @@ def _validate_audio_path(audio_path: str, work_dir: Path) -> None:
             resolved_work_dir = work_dir.resolve()
             try:
                 resolved_path.relative_to(resolved_work_dir)
-            except ValueError:
+            except ValueError as _e:
                 if not is_in_allowed_dirs(resolved_path):
-                    raise PathSecurityError(f"音频路径不在允许目录内: {audio_path[:80]}")
+                    raise PathSecurityError(f"音频路径不在允许目录内: {audio_path[:80]}") from _e
     # URL类型路径不做本地路径校验（由下载阶段的SSRF防护负责）
     # 但检查扩展名
     else:

apps/worker/video_processing/path_security.py

@@ -129,8 +129,8 @@ def safe_resolve_path(
     if not allow_outside:
         try:
             full_path.relative_to(base_dir)
-        except ValueError:
-            raise PathSecurityError(f"路径遍历检测：路径 '{path_str}' 超出基路径 '{base_dir}' 范围")
+        except ValueError as _e:
+            raise PathSecurityError(f"路径遍历检测：路径 '{path_str}' 超出基路径 '{base_dir}' 范围") from _e
 
     # 扩展名校验
     if allowed_extensions is not None:

apps/worker/video_processing/subtitle_render_engine.py

@@ -682,6 +682,6 @@ def _validate_subtitle_path(subtitle_path: str, work_dir: Path) -> None:
         resolved_work_dir = work_dir.resolve()
         try:
             resolved_path.relative_to(resolved_work_dir)
-        except ValueError:
+        except ValueError as _e:
             if not is_in_allowed_dirs(resolved_path):
-                raise PathSecurityError(f"字幕路径不在允许目录内: {subtitle_path[:80]}")
+                raise PathSecurityError(f"字幕路径不在允许目录内: {subtitle_path[:80]}") from _e

apps/worker/video_processing/unified_render_service.py

@@ -1363,23 +1363,37 @@ class UnifiedRenderService:
                 # 单 clip 层，直接使用预处理标签
                 layer_output_labels[layer.role] = layer_labels[0]
             else:
-                # 多 clip 层，用 TransitionEngine 构建转场链
                 out_label = f"{layer.role}_merged"
-                # 计算该层使用的转场时长（取首个非零值，否则用默认）
-                layer_dur = 0.0
-                for d in layer_transition_durations:
-                    if d > 0:
-                        layer_dur = d
-                        break
-                xfade_filter, _ = self._transition_engine.build_xfade_chain(
-                    clip_durations=layer_durations,
-                    clip_video_labels=layer_labels,
-                    transitions=layer_transitions,
-                    transition_duration=layer_dur if layer_dur > 0 else None,
-                    output_label=out_label,
+                # 判断是否全部为硬切：是则用 concat filter，否则用 xfade 转场链
+                all_cut = all(
+                    t is None or t == "" or str(t).lower() == "cut"
+                    for t in layer_transitions[1:]  # 第一个 clip 的转场忽略
                 )
-                if xfade_filter:
-                    filter_parts.append(xfade_filter)
+                if all_cut:
+                    # 全硬切：用 concat filter，性能远优于 xfade
+                    concat_inputs = "".join(f"[{label}]" for label in layer_labels)
+                    filter_parts.append(f"{concat_inputs}concat=n={len(layer_labels)}:v=1:a=0[{out_label}]")
+                    logger.info(
+                        "[unified-render] layer=%s clips=%d using concat (all hard-cut)",
+                        layer.role,
+                        len(layer_labels),
+                    )
+                else:
+                    # 有转场效果：用 TransitionEngine 构建 xfade 链
+                    layer_dur = 0.0
+                    for d in layer_transition_durations:
+                        if d > 0:
+                            layer_dur = d
+                            break
+                    xfade_filter, _ = self._transition_engine.build_xfade_chain(
+                        clip_durations=layer_durations,
+                        clip_video_labels=layer_labels,
+                        transitions=layer_transitions,
+                        transition_duration=layer_dur if layer_dur > 0 else None,
+                        output_label=out_label,
+                    )
+                    if xfade_filter:
+                        filter_parts.append(xfade_filter)
                 layer_output_labels[layer.role] = out_label
 
         # Step 3: 合成各层

apps/worker/worker_app/tasks/compose_video.py

@@ -63,6 +63,18 @@ def compose_video(self, job_id: str, **kwargs):
         resolver = get_render_engine_resolver()
         user_id = job.created_by_user_id or None
         engine = resolver.get_engine(user_id=user_id)
+        # 灰度期间打印详细 flag 配置，便于排查
+        config = resolver.get_config_snapshot()
+        logger.info(
+            "compose_video 引擎选择: job_id=%s engine=%s user_id=%s enabled=%s percentage=%s whitelist=%d default=%s",
+            job_id,
+            engine,
+            user_id,
+            config.get("enabled"),
+            config.get("percentage"),
+            len(config.get("whitelist", [])),
+            config.get("default_engine"),
+        )
 
         if engine == "unified":
             return _compose_with_unified_engine(self, job_service, job, plan_id, db)
@@ -78,7 +90,7 @@ def compose_video(self, job_id: str, **kwargs):
             job_service.fail_job(job_id, str(exc)[:500])
         except Exception:
             logger.exception("更新 Job 失败状态时出错")
-        raise self.retry(exc=exc, countdown=60)
+        raise self.retry(exc=exc, countdown=60) from exc
     finally:
         db.close()
 

apps/worker/worker_app/tasks/edit_plan_generation.py

@@ -77,9 +77,21 @@ def _resolve_render_engine(user_id: str) -> str:
         from video_processing.render_engine_resolver import get_render_engine_resolver
 
         resolver = get_render_engine_resolver()
-        return resolver.get_engine(user_id=user_id)
+        engine = resolver.get_engine(user_id=user_id)
+        # 灰度期间打印详细 flag 配置，便于排查
+        config = resolver.get_config_snapshot()
+        logger.info(
+            "edit_plan 引擎选择: user_id=%s engine=%s enabled=%s percentage=%s whitelist=%d default=%s",
+            user_id,
+            engine,
+            config.get("enabled"),
+            config.get("percentage"),
+            len(config.get("whitelist", [])),
+            config.get("default_engine"),
+        )
+        return engine
     except Exception as exc:
-        logger.warning("获取渲染引擎配置失败，fallback 到 legacy: %s", exc)
+        logger.warning("获取渲染引擎配置失败，fallback 到 legacy: %s", exc, exc_info=True)
         return "legacy"
 
 
@@ -95,6 +107,14 @@ def _mark_plan_failed(plan_repo, plan_id, gen_task_repo, generation_task_id, err
             gen_task.status = "failed"
             gen_task.error_message = error_msg
             gen_task.completed_at = datetime.now(timezone.utc)
+            try:
+                gen_task.append_log(
+                    stage="render_failed",
+                    message=error_msg[:500],
+                    level="ERROR",
+                )
+            except Exception:
+                pass
             gen_task_repo.update(gen_task)
 
 
@@ -148,9 +168,11 @@ def _finalize_render_success(
             clip.mark_rendered()
             clip_repo.update(clip)
 
-    # 更新 EditPlan 状态为 completed
+    # 更新 EditPlan 状态为 completed + 回写实际渲染时长
     plan.config["rendered_url"] = output_url or ""
     plan.config["rendered_storage_key"] = storage_key
+    if hasattr(plan, "total_duration") and duration > 0:
+        plan.total_duration = duration
     plan.mark_completed()
     plan_repo.update(plan)
 
@@ -160,7 +182,15 @@ def _finalize_render_success(
         if gen_task:
             gen_task.status = "completed"
             gen_task.progress = 100.0
-            gen_task.result_count = len(rendered_clip_ids)
+            # 剪辑计划是多片段合成 1 个成片，result_count = 1
+            gen_task.result_count = 1
+            gen_task.append_log(
+                stage="render_complete",
+                message=f"渲染完成，输出时长 {duration:.1f}s",
+                level="INFO",
+                engine=engine,
+                clip_count=len(rendered_clip_ids),
+            )
             gen_task.completed_at = datetime.now(timezone.utc)
             gen_task_repo.update(gen_task)
 
@@ -365,6 +395,13 @@ def render_edit_plan(self, plan_id: str) -> dict:
                 if gen_task:
                     gen_task.status = "running"
                     gen_task.started_at = datetime.now(timezone.utc)
+                    gen_task.append_log(
+                        stage="render_start",
+                        message=f"开始渲染，引擎 {engine}，片段数 {len(clips)}",
+                        level="INFO",
+                        engine=engine,
+                        clip_count=len(clips),
+                    )
                     gen_task_repo.update(gen_task)
 
             # 3. 下载素材并构建 asset_path_map
@@ -429,9 +466,28 @@ def render_edit_plan(self, plan_id: str) -> dict:
                             gen_task.status = "failed"
                             gen_task.error_message = "所有片段素材下载失败"
                             gen_task.completed_at = datetime.now(timezone.utc)
+                            gen_task.append_log(
+                                stage="download_failed",
+                                message="所有片段素材下载失败",
+                                level="ERROR",
+                            )
                             gen_task_repo.update(gen_task)
                     return {"status": "error", "message": "所有片段素材下载失败"}
 
+                # 素材下载完成，记录日志
+                if generation_task_id:
+                    gen_task = gen_task_repo.get(generation_task_id)
+                    if gen_task:
+                        gen_task.append_log(
+                            stage="download_done",
+                            message=f"素材下载完成，成功 {len(asset_path_map)} 个，失败 {len(failed_clip_ids)} 个",
+                            level="INFO",
+                            success_count=len(asset_path_map),
+                            failed_count=len(failed_clip_ids),
+                        )
+                        gen_task.progress = 30.0
+                        gen_task_repo.update(gen_task)
+
                 # 4. 根据引擎选择渲染方式
                 if engine == "unified":
                     result = _render_with_unified(
@@ -483,6 +539,15 @@ def render_edit_plan(self, plan_id: str) -> dict:
                         gen_task.status = "failed"
                         gen_task.error_message = f"渲染异常: {type(exc).__name__}: {exc}"
                         gen_task.completed_at = datetime.now(timezone.utc)
+                        try:
+                            gen_task.append_log(
+                                stage="render_failed",
+                                message=f"渲染异常: {type(exc).__name__}: {str(exc)[:500]}",
+                                level="ERROR",
+                                exception_type=type(exc).__name__,
+                            )
+                        except Exception:
+                            pass
                         gen_task_repo.update(gen_task)
                         logger.info(
                             "GenerationTask 已标记为 failed: task_id=%s plan_id=%s",
@@ -493,6 +558,6 @@ def render_edit_plan(self, plan_id: str) -> dict:
                 logger.warning(
                     "更新 GenerationTask 失败状态时异常: task_id=%s error=%s", generation_task_id, e, exc_info=True
                 )
-            raise self.retry(exc=exc, countdown=60)
+            raise self.retry(exc=exc, countdown=60) from exc
 
     return {"status": "error", "message": "数据库连接失败"}

apps/worker/worker_app/tasks/generation.py

@@ -787,10 +787,23 @@ def _resolve_render_engine(user_id: str) -> str:
         from video_processing.render_engine_resolver import get_render_engine_resolver
 
         resolver = get_render_engine_resolver()
-        return resolver.get_engine(user_id=user_id)
+        engine = resolver.get_engine(user_id=user_id)
+        # 灰度期间打印详细 flag 配置，便于排查
+        config = resolver.get_config_snapshot()
+        logger.info(
+            "[渲染引擎] flag 解析: user_id=%s engine=%s enabled=%s percentage=%s whitelist=%d default=%s",
+            user_id,
+            engine,
+            config.get("enabled"),
+            config.get("percentage"),
+            len(config.get("whitelist", [])),
+            config.get("default_engine"),
+        )
+        return engine
     except Exception as exc:
-        logger.warning("获取渲染引擎配置失败，fallback 到 unified: %s", exc)
-        return ENGINE_UNIFIED
+        # 异常时 fallback 到 legacy（保守策略，与 edit_plan_generation 一致）
+        logger.warning("获取渲染引擎配置失败，fallback 到 legacy: %s", exc, exc_info=True)
+        return ENGINE_LEGACY
 
 
 # ── 旧引擎渲染（FFmpeg filter_complex） ────────────────────────────────────────

apps/worker/worker_app/tasks/tts_synthesis.py

@@ -63,7 +63,7 @@ def process_tts_synthesis(self: Task, job_id: str) -> dict:
         if session is not None:
             session.rollback()
         # 超时重试，指数退避
-        raise self.retry(exc=e, countdown=30)
+        raise self.retry(exc=e, countdown=30) from e
 
     except CosyVoiceError as e:
         logger.error(f"TTS synthesis failed for {job_id}: {e}")
@@ -139,7 +139,7 @@ def process_tts_segment_synthesis(self: Task, job_id: str) -> dict:
         logger.warning(f"TTS segment synthesis timeout for {job_id}: {e}")
         if session is not None:
             session.rollback()
-        raise self.retry(exc=e, countdown=60)
+        raise self.retry(exc=e, countdown=60) from e
 
     except CosyVoiceError as e:
         logger.error(f"TTS segment synthesis failed for {job_id}: {e}")

apps/worker/worker_app/tasks/voice_clone.py

@@ -73,7 +73,7 @@ def process_voice_clone(self: Task, profile_id: str) -> dict:
         if session is not None:
             session.rollback()
         # 超时属于临时性故障，延迟 30 秒后重试
-        raise self.retry(exc=e, countdown=30)
+        raise self.retry(exc=e, countdown=30) from e
 
     except CosyVoiceError as e:
         logger.error(f"Voice clone failed for {profile_id}: {e}")

apps/worker/worker_app/tasks/voice_extraction.py

@@ -105,7 +105,7 @@ def extract_voice_task(self: Task, asset_id: str) -> dict:
     except Exception as e:
         logger.error(f"Voice extraction failed for {asset_id}: {str(e)}")
         session.rollback()
-        raise self.retry(exc=e, countdown=60)
+        raise self.retry(exc=e, countdown=60) from e
     finally:
         session.close()
         import shutil
@@ -141,7 +141,7 @@ def extract_background_task(self: Task, asset_id: str) -> dict:
     except Exception as e:
         logger.error(f"Background extraction failed for {asset_id}: {str(e)}")
         session.rollback()
-        raise self.retry(exc=e, countdown=60)
+        raise self.retry(exc=e, countdown=60) from e
     finally:
         session.close()
         import shutil

packages/application/auth/jwt_service.py

@@ -147,10 +147,10 @@ class JWTService:
                 algorithms=[self.config.ALGORITHM],
             )
             return payload
-        except ExpiredSignatureError:
-            raise ExpiredSignatureError("Token has expired")
+        except ExpiredSignatureError as _e:
+            raise ExpiredSignatureError("Token has expired") from _e
         except InvalidTokenError as e:
-            raise InvalidTokenError(f"Invalid token: {str(e)}")
+            raise InvalidTokenError(f"Invalid token: {str(e)}") from e
 
     def verify_access_token(self, token: str) -> Dict[str, Any]:
         """

packages/application/cosyvoice_service.py

@@ -656,8 +656,8 @@ class CosyVoiceService:
                         code = body.get("code", "")
                         message = body.get("message", "")
                         raise CosyVoiceError(f"CosyVoice API 参数错误: HTTP 400, " f"code={code}, message={message}")
-                    except ValueError:
-                        raise CosyVoiceError(f"CosyVoice API 调用失败: HTTP 400, body={body_text}")
+                    except ValueError as _e:
+                        raise CosyVoiceError(f"CosyVoice API 调用失败: HTTP 400, body={body_text}") from _e
                 elif response.status_code >= 500:
                     # 服务端错误，可重试
                     last_error = CosyVoiceError(f"CosyVoice API 服务端错误: HTTP {response.status_code}")

packages/application/tts_job/audio_merger.py

@@ -78,16 +78,16 @@ class AudioMerger:
                 run_ffmpeg(cmd, timeout=120)
             except CalledProcessError as e:
                 logger.error(f"FFmpeg 合并失败: stderr={e.stderr}")
-                raise AudioMergeError(f"FFmpeg 合并失败: {str(e)[:500]}")
+                raise AudioMergeError(f"FFmpeg 合并失败: {str(e)[:500]}") from e
 
             with open(output_path, "rb") as f:
                 return f.read()
 
-        except TimeoutExpired:
-            raise AudioMergeError("FFmpeg 合并超时（120 秒）")
+        except TimeoutExpired as _e:
+            raise AudioMergeError("FFmpeg 合并超时（120 秒）") from _e
         except AudioMergeError:
             raise
         except Exception as e:
-            raise AudioMergeError(f"音频合并失败: {e}")
+            raise AudioMergeError(f"音频合并失败: {e}") from e
         finally:
             shutil.rmtree(temp_dir, ignore_errors=True)

packages/domain/generation_task.py

@@ -170,8 +170,8 @@ class GenerationTask:
         if isinstance(new_status, str):
             try:
                 new_status = GenerationTaskStatus(new_status)
-            except ValueError:
-                raise ValueError(f"无效状态: {new_status}")
+            except ValueError as _e:
+                raise ValueError(f"无效状态: {new_status}") from _e
 
         allowed = _VALID_TRANSITIONS.get(self.status, set())
         if new_status not in allowed:

packages/domain/job.py

@@ -147,8 +147,8 @@ class Job:
         if isinstance(job_type, str):
             try:
                 job_type = JobType(job_type)
-            except ValueError:
-                raise ValueError(f"不支持的任务类型: {job_type}")
+            except ValueError as _e:
+                raise ValueError(f"不支持的任务类型: {job_type}") from _e
 
         return cls(
             id=uuid4().hex,
@@ -182,8 +182,8 @@ class Job:
         if isinstance(new_status, str):
             try:
                 new_status = JobStatus(new_status)
-            except ValueError:
-                raise ValueError(f"无效状态: {new_status}")
+            except ValueError as _e:
+                raise ValueError(f"无效状态: {new_status}") from _e
 
         allowed = _VALID_TRANSITIONS.get(self.status, set())
         if new_status not in allowed:

packages/domain/tts_job.py

@@ -193,8 +193,8 @@ class TTSJob:
         if isinstance(new_status, str):
             try:
                 new_status = TTSJobStatus(new_status)
-            except ValueError:
-                raise ValueError(f"无效状态: {new_status}")
+            except ValueError as _e:
+                raise ValueError(f"无效状态: {new_status}") from _e
 
         allowed = _VALID_TRANSITIONS.get(self.status, set())
         if new_status not in allowed:

packages/domain/voice_clone_profile.py

@@ -177,8 +177,8 @@ class VoiceCloneProfile:
         if isinstance(new_status, str):
             try:
                 new_status = VoiceCloneStatus(new_status)
-            except ValueError:
-                raise ValueError(f"无效状态: {new_status}")
+            except ValueError as _e:
+                raise ValueError(f"无效状态: {new_status}") from _e
 
         allowed = _VALID_TRANSITIONS.get(self.status, set())
         if new_status not in allowed:

packages/shared/storage.py

@@ -114,7 +114,7 @@ class SharedStorageService:
                 self.bucket.put_object(storage_key, file_or_path, headers={"Content-Type": content_type})
             return f"{self.public_url}/{storage_key}"
         except Exception as e:
-            raise Exception(f"Failed to upload file to OSS: {e}")
+            raise Exception(f"Failed to upload file to OSS: {e}") from e
 
     def get_url(self, storage_key: str) -> str:
         """Get public URL for a file."""
@@ -129,7 +129,7 @@ class SharedStorageService:
             os.makedirs(os.path.dirname(local_path), exist_ok=True)
             self.bucket.get_object_to_file(storage_key, local_path)
         except Exception as e:
-            raise Exception(f"Failed to download file from OSS: {e}")
+            raise Exception(f"Failed to download file from OSS: {e}") from e
 
     def get_download_url(self, storage_key_or_url: str, expires_seconds: int = 3600) -> str:
         """Get signed download URL."""

tests/unit/test_edit_plan_generation_api.py

@@ -665,7 +665,16 @@ class TestResponseSchema:
         resp = client.get(f"/api/v1/edit-plans/{plan.id}/generation-status")
         assert resp.status_code == 200
         data = resp.json()
-        expected_keys = {"plan_id", "plan_status", "generation_task_id", "clips"}
+        expected_keys = {
+            "plan_id",
+            "plan_status",
+            "generation_task_id",
+            "generation_task_status",
+            "progress",
+            "video_url",
+            "error_message",
+            "clips",
+        }
         assert set(data.keys()) == expected_keys
 
 

tests/unit/test_tech_debt_security_round2.py

@@ -367,7 +367,7 @@ class TestVerifyUrlRedirectValidation:
                     except urllib.error.HTTPError as e:
                         if 300 <= e.code < 400 and e.headers.get("Location"):
                             if redirect_count >= max_redirects:
-                                raise Exception(f"重定向次数超过上限 ({max_redirects})")
+                                raise Exception(f"重定向次数超过上限 ({max_redirects})") from e
                             location = e.headers["Location"]
                             current = urljoin(safe_url, location)
                             redirect_count += 1

tests/unit/test_unified_render_service.py

@@ -45,6 +45,7 @@ class FakeClip:
     start_time: float = 0.0
     duration: float = 0.0
     transition_effect: str = "cut"
+    transition_duration: float = 0.0
     status: str = "ready"
     config: dict[str, Any] = field(default_factory=dict)
 
@@ -65,6 +66,7 @@ def _make_clip(
     asset_id: str = "",
     duration: float = 0.0,
     transition_effect: str = "cut",
+    transition_duration: float = 0.0,
     config: dict[str, Any] | None = None,
 ) -> FakeClip:
     return FakeClip(
@@ -74,6 +76,7 @@ def _make_clip(
         asset_id=asset_id or f"asset_{clip_id}.mp4",
         duration=duration,
         transition_effect=transition_effect,
+        transition_duration=transition_duration,
         config=config or {},
     )
 
@@ -332,7 +335,7 @@ class TestBuildFilterComplex:
         assert "[final_video]" in fc
 
     def test_single_layer_multi_clips(self):
-        """多个 main clips → xfade 串联。"""
+        """多个 main clips（默认硬切）→ concat 串联。"""
         clips = [
             _make_clip("c1", "main", order=0, duration=3.0),
             _make_clip("c2", "main", order=1, duration=3.0),
@@ -343,6 +346,35 @@ class TestBuildFilterComplex:
         }
         svc = _make_service(clips, asset_paths)
 
+        with _patch_path_exists(), patch("video_processing.unified_render_service.probe_duration", return_value=5.0):
+            resolved = svc._resolve_clips()
+            layers = svc._group_clips_into_layers(resolved)
+            fc, input_args = svc._build_filter_complex(layers)
+
+        assert input_args.count("-i") == 2
+        # 全硬切场景走 concat filter（性能远优于 xfade）
+        assert "concat=n=2:v=1:a=0" in fc
+        assert "[final_video]" in fc
+
+    def test_single_layer_multi_clips_with_transition(self):
+        """多个 main clips 带转场效果 → xfade 串联。"""
+        clips = [
+            _make_clip("c1", "main", order=0, duration=3.0),
+            _make_clip(
+                "c2",
+                "main",
+                order=1,
+                duration=3.0,
+                transition_effect="fade",
+                transition_duration=0.5,
+            ),
+        ]
+        asset_paths = {
+            "asset_c1.mp4": Path("/tmp/asset_c1.mp4"),
+            "asset_c2.mp4": Path("/tmp/asset_c2.mp4"),
+        }
+        svc = _make_service(clips, asset_paths)
+
         with _patch_path_exists(), patch("video_processing.unified_render_service.probe_duration", return_value=5.0):
             resolved = svc._resolve_clips()
             layers = svc._group_clips_into_layers(resolved)
@@ -380,7 +412,7 @@ class TestBuildFilterComplex:
         """
         clips = [
             _make_clip("c1", "main", order=0, duration=3.0),
-            _make_clip("c2", "main", order=1, duration=5.0),
+            _make_clip("c2", "main", order=1, duration=5.0, transition_effect="fade", transition_duration=0.5),
         ]
         asset_paths = {
             "asset_c1.mp4": Path("/tmp/asset_c1.mp4"),