fix: black + isort + flake8 E303 全量格式修复

- black: 修复 scripts/check_migration_safety.py 末尾空行
- isort: 修复 5 个文件的 import 排序
  - apps/api/app/api/routes/generation_tasks.py
  - apps/api/app/core/storage.py
  - apps/api/app/services/job_service.py
  - tests/unit/test_tts_oss_transfer.py
  - tests/unit/test_feature_flag.py
- flake8 E303: 修复 assets.py 多余空行

注：E704（Protocol 单行 def）和 E226（f-string 内运算符）
为合理写法，未修改；如 CI 卡住可在 .flake8 中加 ignore。

apps/api/app/api/routes/assets.py

@@ -1,6 +1,7 @@
 import logging
 from typing import Any, Optional
 
+from app.api.routes._helpers import check_project_access
 from app.auth import AuthenticatedUser, get_current_user
 from app.core.storage import get_storage_service
 from app.dependencies import (
@@ -27,8 +28,6 @@ from packages.application import (
 )
 from packages.domain import AssetStatus, ClassificationStatus
 
-from app.api.routes._helpers import check_project_access
-
 logger = logging.getLogger(__name__)
 
 router = APIRouter()
@@ -74,7 +73,6 @@ def _to_asset_response(item, storage_service=None) -> AssetResponse:
     )
 
 
-
 @router.get("", response_model=ListAssetsResponse)
 def list_assets(
     library_id: Optional[str] = Query(None),

apps/api/app/api/routes/chunked_upload.py

@@ -13,6 +13,7 @@ from pathlib import Path
 from typing import Any
 from uuid import uuid4
 
+from app.api.routes._helpers import require_project_and_library
 from app.auth import AuthenticatedUser, get_current_user
 from app.core.celery_app import celery_app
 from app.core.storage import OSSStorageService, get_storage_service
@@ -34,8 +35,6 @@ from fastapi.params import File
 
 from packages.application import GetProjectUseCase, SubmitIngestJobCommand, SubmitIngestJobUseCase
 
-from app.api.routes._helpers import require_project_and_library
-
 router = APIRouter()
 logger = logging.getLogger(__name__)
 

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

@@ -45,11 +45,11 @@ from packages.application.generation_tasks import (
     CreateGenerationTaskCommand,
     CreateGenerationTaskUseCase,
 )
-
-from ._helpers import check_project_access
 from packages.domain.config_schemas import normalize_plan_config
 from packages.domain.edit_plan import EditPlan, EditPlanStatus
 
+from ._helpers import check_project_access
+
 logger = logging.getLogger(__name__)
 
 router = APIRouter()

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

@@ -3,6 +3,7 @@ import random
 import uuid
 from typing import Any
 
+from app.api.routes._helpers import check_project_access
 from app.auth import AuthenticatedUser, get_current_user
 from app.core.storage import OSSStorageService, get_storage_service
 from app.core.task_enqueue import (
@@ -31,8 +32,6 @@ from app.schemas.generation_task import (
 )
 from fastapi import APIRouter, Depends, HTTPException
 
-from app.api.routes._helpers import check_project_access
-
 from packages.application import (
     CreateGenerationTaskCommand,
     CreateGenerationTaskUseCase,

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

@@ -4,6 +4,7 @@ from __future__ import annotations
 
 from typing import Optional
 
+from app.api.routes._helpers import get_user_plan
 from app.auth import AuthenticatedUser, get_current_user
 from app.dependencies import get_db_session, get_user_repository
 from app.schemas.title_library import (
@@ -28,8 +29,6 @@ from packages.application.title_library.use_cases import (
 )
 from packages.ports.user_repository import UserRepository
 
-from app.api.routes._helpers import get_user_plan
-
 router = APIRouter()
 
 

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

@@ -2,6 +2,7 @@ import logging
 from typing import Any
 from uuid import uuid4
 
+from app.api.routes._helpers import require_project_and_library
 from app.auth import AuthenticatedUser, get_current_user
 from app.config import get_settings
 from app.core.celery_app import celery_app
@@ -23,8 +24,6 @@ from fastapi import APIRouter, Depends, File, Form, HTTPException, UploadFile, s
 
 from packages.application import SubmitIngestJobCommand, SubmitIngestJobUseCase
 
-from app.api.routes._helpers import require_project_and_library
-
 logger = logging.getLogger(__name__)
 
 router = APIRouter()

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

@@ -7,6 +7,7 @@ from __future__ import annotations
 
 from typing import Literal, Optional
 
+from app.api.routes._helpers import get_user_plan
 from app.auth import AuthenticatedUser, get_current_user
 from app.dependencies import get_audio_url_signer, get_db_session, get_user_repository
 from app.schemas.voice import (
@@ -39,8 +40,6 @@ from packages.application.voice_library.use_cases import (
 from packages.domain.preset_voices import PRESET_VOICES
 from packages.ports.user_repository import UserRepository
 
-from app.api.routes._helpers import get_user_plan
-
 router = APIRouter()
 
 

apps/api/app/core/storage.py

@@ -5,8 +5,8 @@ This module keeps old import paths working so existing code
 does not need to change.
 """
 
+from packages.shared.storage import SharedStorageService as OSSStorageService
 from packages.shared.storage import (
-    SharedStorageService as OSSStorageService,
     get_shared_storage_service,
     get_storage_service,
 )

apps/api/app/services/job_service.py

@@ -13,7 +13,6 @@ from __future__ import annotations
 import logging
 from typing import Any
 
-
 from packages.application.jobs import (
     CancelJobUseCase,
     CompleteJobCommand,

scripts/check_migration_safety.py

@@ -247,4 +247,3 @@ def main() -> int:
 
 if __name__ == "__main__":
     sys.exit(main())
-

tests/unit/test_feature_flag.py

@@ -7,7 +7,6 @@ from __future__ import annotations
 
 from unittest.mock import MagicMock
 
-
 from packages.adapters.redis.feature_flag_store import (
     FeatureFlagConfig,
     InMemoryFeatureFlagStore,

tests/unit/test_tts_oss_transfer.py

@@ -9,7 +9,6 @@ from __future__ import annotations
 from datetime import datetime, timezone
 from unittest.mock import MagicMock, patch
 
-
 from packages.application.cosyvoice_service import CosyVoiceService
 from packages.application.tts_job.workflow import TTSWorkflowService
 from packages.domain.tts_job import TTSJob, TTSJobStatus