diff --git a/apps/api/app/api/routes/feature_flags.py b/apps/api/app/api/routes/feature_flags.py
index 287ebf745..fada08be9 100755
--- a/apps/api/app/api/routes/feature_flags.py
+++ b/apps/api/app/api/routes/feature_flags.py
@@ -23,7 +23,6 @@ from fastapi import APIRouter, Depends, HTTPException, Query, status
 from pydantic import BaseModel, Field
 
 from packages.adapters.redis.feature_flag_store import (
-    FEATURE_FLAG_REDIS_PREFIX,
     FeatureFlagConfig,
     RedisFeatureFlagStore,
 )
diff --git a/apps/api/app/api/routes/generation_tasks.py b/apps/api/app/api/routes/generation_tasks.py
index f3f94208d..04d509b02 100755
--- a/apps/api/app/api/routes/generation_tasks.py
+++ b/apps/api/app/api/routes/generation_tasks.py
@@ -10,7 +10,6 @@ from app.core.task_enqueue import (
     USER_PENDING_LIMIT,
     GlobalQueueFull,
     UserPendingLimitExceeded,
-    check_queue_limits,
     safe_enqueue_generation_task,
 )
 from app.dependencies import (
diff --git a/apps/worker/video_processing/dedup.py b/apps/worker/video_processing/dedup.py
index e71d96cb8..efbbd7b4d 100755
--- a/apps/worker/video_processing/dedup.py
+++ b/apps/worker/video_processing/dedup.py
@@ -1,10 +1,8 @@
 """Video deduplication module - compute fingerprints and detect duplicates."""
 
 import hashlib
-import json
 import logging
 import os
-import subprocess
 import tempfile
 from dataclasses import dataclass
 from typing import Optional
@@ -327,7 +325,6 @@ def check_duplicate_task(self: Task, generated_video_id: str) -> dict:
             raise ValueError(f"Generated video {generated_video_id} not found")
 
         local_path = os.path.join(temp_dir, f"{generated_video_id}.mp4")
-        storage_key = video.file_url.split("/")[-1]
         storage_service.download_file(
             f"projects/{video.project_id}/generated/{generated_video_id}/{generated_video_id}.mp4", local_path
         )
diff --git a/apps/worker/video_processing/ffmpeg_utils.py b/apps/worker/video_processing/ffmpeg_utils.py
index 379353910..02c1a099e 100755
--- a/apps/worker/video_processing/ffmpeg_utils.py
+++ b/apps/worker/video_processing/ffmpeg_utils.py
@@ -81,7 +81,7 @@ def run_ffmpeg(
             timeout=timeout,
         )
         return (result.stdout or "", result.stderr or "")
-    except subprocess.TimeoutExpired as e:
+    except subprocess.TimeoutExpired:
         logger.error(
             "FFmpeg 命令超时 (%ds): command=%s",
             timeout or -1,
diff --git a/apps/worker/video_processing/oss_helpers.py b/apps/worker/video_processing/oss_helpers.py
index 8638e4567..78944886d 100755
--- a/apps/worker/video_processing/oss_helpers.py
+++ b/apps/worker/video_processing/oss_helpers.py
@@ -11,7 +11,6 @@ import logging
 import os
 import threading
 from pathlib import Path
-from typing import Optional
 from urllib.parse import urlparse
 
 import oss2
diff --git a/apps/worker/video_processing/processor.py b/apps/worker/video_processing/processor.py
index 236b602c5..6e9329d3a 100644
--- a/apps/worker/video_processing/processor.py
+++ b/apps/worker/video_processing/processor.py
@@ -5,7 +5,6 @@
 import os
 import tempfile
 from dataclasses import dataclass
-from pathlib import Path
 from typing import List
 
 import ffmpeg
diff --git a/apps/worker/video_processing/render_adapter.py b/apps/worker/video_processing/render_adapter.py
index 2b09bc3db..4fd5f76c0 100755
--- a/apps/worker/video_processing/render_adapter.py
+++ b/apps/worker/video_processing/render_adapter.py
@@ -17,15 +17,15 @@ import logging
 import tempfile
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Any, Callable
+from typing import Callable
 
 from sqlalchemy.orm import Session
 from video_processing.oss_helpers import download_asset, upload_to_oss
-from video_processing.unified_render_service import RenderResult, UnifiedRenderService
+from video_processing.unified_render_service import UnifiedRenderService
 
 from packages.adapters.sqlalchemy_impl.edit_plan_clip_repository import SQLAlchemyEditPlanClipRepository
 from packages.adapters.sqlalchemy_impl.edit_plan_repository import SQLAlchemyEditPlanRepository
-from packages.domain.edit_plan import EditPlan, EditPlanStatus
+from packages.domain.edit_plan import EditPlanStatus
 from packages.domain.edit_plan_clip import EditPlanClip, EditPlanClipStatus
 
 logger = logging.getLogger(__name__)
diff --git a/apps/worker/worker_app/tasks/asset_analyzer.py b/apps/worker/worker_app/tasks/asset_analyzer.py
index 218990289..c38a26304 100755
--- a/apps/worker/worker_app/tasks/asset_analyzer.py
+++ b/apps/worker/worker_app/tasks/asset_analyzer.py
@@ -10,12 +10,10 @@ from __future__ import annotations
 
 import json
 import logging
-import math
 import os
 import subprocess
 import tempfile
 from dataclasses import dataclass, field
-from typing import Any
 
 import numpy as np
 from PIL import Image
diff --git a/apps/worker/worker_app/tasks/classification.py b/apps/worker/worker_app/tasks/classification.py
index 65ffff9ee..cb0fd5a1e 100755
--- a/apps/worker/worker_app/tasks/classification.py
+++ b/apps/worker/worker_app/tasks/classification.py
@@ -1,4 +1,3 @@
-from celery import Task
 from celery.utils.log import get_task_logger
 from worker_app.celery_app import celery_app
 
@@ -9,7 +8,6 @@ from packages.adapters.sqlalchemy_impl.classification_job_repository import (
     SQLAlchemyClassificationJobRepository,
 )
 from packages.domain import (
-    ClassificationJob,
     ClassificationJobStatus,
     ClassificationStatus,
 )
diff --git a/apps/worker/worker_app/tasks/compose_video.py b/apps/worker/worker_app/tasks/compose_video.py
index b02d4f686..4150e0fc2 100755
--- a/apps/worker/worker_app/tasks/compose_video.py
+++ b/apps/worker/worker_app/tasks/compose_video.py
@@ -5,12 +5,9 @@
 
 from __future__ import annotations
 
-import logging
 import os
-import shutil
 import subprocess
 import tempfile
-from datetime import datetime, timezone
 from pathlib import Path
 
 from celery.utils.log import get_task_logger
diff --git a/apps/worker/worker_app/tasks/edit_plan_generation.py b/apps/worker/worker_app/tasks/edit_plan_generation.py
index a0011daf2..5c789d99b 100755
--- a/apps/worker/worker_app/tasks/edit_plan_generation.py
+++ b/apps/worker/worker_app/tasks/edit_plan_generation.py
@@ -21,7 +21,6 @@ import logging
 import tempfile
 from datetime import datetime, timezone
 from pathlib import Path
-from typing import Optional
 
 from worker_app.celery_app import celery_app
 from worker_app.db import SessionLocal
diff --git a/apps/worker/worker_app/tasks/generation.py b/apps/worker/worker_app/tasks/generation.py
index edb22eb8d..2e145eeed 100644
--- a/apps/worker/worker_app/tasks/generation.py
+++ b/apps/worker/worker_app/tasks/generation.py
@@ -13,15 +13,13 @@
 
 from __future__ import annotations
 
-import json
 import logging
 import os
 import tempfile
 import time
 from dataclasses import dataclass, field
-from datetime import datetime, timezone
 from pathlib import Path
-from typing import Any, Optional
+from typing import Any
 
 from worker_app.celery_app import celery_app
 from worker_app.db import SessionLocal
@@ -174,7 +172,6 @@ def _build_plan_and_clips_from_task(
         path_duration[p] = probe_duration(p)
 
     clips: list[_VirtualClip] = []
-    n = len(downloaded_paths)
 
     if mode == "pip":
         # 1 main + N-1 overlay
@@ -912,7 +909,6 @@ def generate_video(self, task_id: str) -> dict:
                 render_result = render_service.render()
                 render_output_path = render_result.output_path
                 render_duration = render_result.duration
-                render_file_size = render_result.file_size
                 render_elapsed = time.monotonic() - render_start
                 logger.info(
                     "[task_id=%s] [渲染] unified 引擎完成: 耗时=%.1fs",
diff --git a/apps/worker/worker_app/tasks/ingest.py b/apps/worker/worker_app/tasks/ingest.py
index e131cec5c..0261c6e8c 100755
--- a/apps/worker/worker_app/tasks/ingest.py
+++ b/apps/worker/worker_app/tasks/ingest.py
@@ -1,9 +1,6 @@
 import subprocess
 from datetime import datetime, timezone
-from typing import Optional
 
-from celery import Celery
-from celery.app.task import Task
 from celery.utils.log import get_task_logger
 from worker_app.celery_app import celery_app
 from worker_app.core.asset_types import infer_mime_type_from_storage_key
diff --git a/apps/worker/worker_app/tasks/voice_extraction.py b/apps/worker/worker_app/tasks/voice_extraction.py
index 994954596..b08335809 100644
--- a/apps/worker/worker_app/tasks/voice_extraction.py
+++ b/apps/worker/worker_app/tasks/voice_extraction.py
@@ -1,14 +1,11 @@
 """Voice extraction tasks - extract voice tracks and background music from videos."""
 
-import json
 import logging
 import os
 import subprocess
 import tempfile
-from typing import Optional
 
 from celery import Task
-from sqlalchemy.orm import Session
 from worker_app.celery_app import celery_app
 from worker_app.db import SessionLocal
 
diff --git a/requirements-base.txt b/requirements-base.txt
index e1b3606da..f01d9a400 100755
--- a/requirements-base.txt
+++ b/requirements-base.txt
@@ -24,9 +24,6 @@ celery==5.4.0
 
 # 对象存储
 oss2==2.18.4
-cryptography==46.0.5
-# 覆盖系统预装的旧版pyOpenSSL，与cryptography 46.0.5兼容
-pyOpenSSL==26.2.0
 
 # HTTP 客户端
 httpx==0.27.2
diff --git a/tests/conftest.py b/tests/conftest.py
index 22b851da5..e2155d134 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -17,18 +17,13 @@ os.environ.setdefault("USE_IN_MEMORY_DB", "True")
 # CI 环境没有 Redis，所有 Celery 异步任务都 mock 掉，避免连接超时报错
 # 集成测试只测 API 层逻辑（参数校验、权限、DB 操作），异步任务由 worker 单测覆盖
 
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 
 
 def _mock_celery_task():
     """全局 mock Celery 任务的 delay/apply_async/send_task 方法。"""
     from celery import Celery, Task
 
-    # 保存原始方法
-    _orig_delay = Task.delay
-    _orig_apply_async = Task.apply_async
-    _orig_send_task = Celery.send_task
-
     def _mock_delay(self, *args, **kwargs):
         mock_result = MagicMock()
         mock_result.id = "mock-task-id"
diff --git a/tests/integration/conftest.py b/tests/integration/conftest.py
index b6aa3765e..7a9247719 100644
--- a/tests/integration/conftest.py
+++ b/tests/integration/conftest.py
@@ -113,7 +113,6 @@ class PerfAssert:
             raise ValueError(f"未知的阈值级别: {threshold_level}，可选: {list(PERF_THRESHOLDS.keys())}")
 
         threshold_ms = PERF_THRESHOLDS[threshold_level]
-        num_samples = samples or self.sample_count
         result = PerfResult(name=name or threshold_level, threshold_ms=threshold_ms)
 
         # 预热（第一次请求可能有冷启动开销）
diff --git a/tests/integration/fixtures/duplication_routes_fixed.py b/tests/integration/fixtures/duplication_routes_fixed.py
deleted file mode 100755
index 39c94649f..000000000
--- a/tests/integration/fixtures/duplication_routes_fixed.py
+++ /dev/null
@@ -1,282 +0,0 @@
-"""查重 API 路由。"""
-
-from __future__ import annotations
-
-import logging
-from typing import Any
-from uuid import uuid4
-
-from app.auth import AuthenticatedUser, get_current_user
-from app.core.storage import OSSStorageService, get_storage_service
-from app.dependencies import get_duplication_repository
-from app.schemas.duplication import (
-    DuplicateSegmentResponse,
-    DuplicationDetailResponse,
-    DuplicationRecordResponse,
-    DuplicationUploadResponse,
-)
-from fastapi import APIRouter, Depends, File, HTTPException, Response, UploadFile, status
-
-from packages.application import (
-    DeleteDuplicationRecordUseCase,
-    GetDuplicationDetailUseCase,
-    ListDuplicationRecordsUseCase,
-    RetryDuplicationUseCase,
-    UploadForDuplicationCommand,
-    UploadForDuplicationUseCase,
-)
-from packages.domain.duplication import DuplicationRecord
-
-logger = logging.getLogger(__name__)
-
-router = APIRouter()
-
-# 查重功能只接受视频文件
-ALLOWED_VIDEO_MIME_TYPES = frozenset(
-    {
-        "video/mp4",
-        "video/mpeg",
-        "video/quicktime",
-        "video/x-msvideo",
-        "video/webm",
-        "video/x-matroska",
-        "video/3gpp",
-    }
-)
-
-
-def _validate_video_mime_type(content_type: str | None) -> str:
-    """验证视频文件的 MIME 类型，如果无效则抛出异常。"""
-    if not content_type:
-        raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST,
-            detail="Content-Type header is required",
-        )
-
-    # 处理带参数的类型，如 "video/mp4; charset=utf-8"
-    base_type = content_type.split(";")[0].strip().lower()
-
-    if base_type not in ALLOWED_VIDEO_MIME_TYPES:
-        raise HTTPException(
-            status_code=status.HTTP_415_UNSUPPORTED_MEDIA_TYPE,
-            detail="只支持视频文件。支持的类型: mp4, mpeg, mov, avi, webm, mkv, 3gp",
-        )
-
-    return base_type
-
-
-def _to_record_response(record: DuplicationRecord) -> DuplicationRecordResponse:
-    return DuplicationRecordResponse(
-        id=record.id,
-        filename=record.filename,
-        file_size=record.file_size,
-        duration_seconds=record.duration_seconds,
-        status=record.status,
-        duplicate_rate=record.duplicate_rate,
-        duplicate_count=record.duplicate_count,
-        created_at=record.created_at.isoformat(),
-        updated_at=record.updated_at.isoformat(),
-    )
-
-
-def _to_detail_response(record: DuplicationRecord) -> DuplicationDetailResponse:
-    return DuplicationDetailResponse(
-        id=record.id,
-        filename=record.filename,
-        file_size=record.file_size,
-        duration_seconds=record.duration_seconds,
-        status=record.status,
-        duplicate_rate=record.duplicate_rate,
-        duplicate_count=record.duplicate_count,
-        created_at=record.created_at.isoformat(),
-        updated_at=record.updated_at.isoformat(),
-        segments=[
-            DuplicateSegmentResponse(
-                id=seg.id,
-                source_start=seg.source_start,
-                source_end=seg.source_end,
-                matched_video_id=seg.matched_video_id,
-                matched_video_name=seg.matched_video_name,
-                matched_start=seg.matched_start,
-                matched_end=seg.matched_end,
-                similarity=seg.similarity,
-            )
-            for seg in record.segments
-        ],
-    )
-
-
-@router.post("/upload", response_model=DuplicationUploadResponse)
-async def upload_for_duplication(
-    file: UploadFile = File(..., description="要查重的视频文件"),
-    authenticated_user: AuthenticatedUser = Depends(get_current_user),
-    duplication_repository: Any = Depends(get_duplication_repository),
-    storage_service: OSSStorageService = Depends(get_storage_service),
-) -> DuplicationUploadResponse:
-    """上传视频进行查重。"""
-    if file.filename is None:
-        raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST,
-            detail="文件名不能为空",
-        )
-
-    # P0-1: 验证 MIME 类型（只接受视频文件）
-    validated_content_type = _validate_video_mime_type(file.content_type)
-
-    # P0-2: 验证文件大小（参考 OSS_DIRECT_UPLOAD_MAX_MB）
-    from app.config import get_settings
-
-    settings = get_settings()
-    max_size_bytes = settings.OSS_DIRECT_UPLOAD_MAX_MB * 1024 * 1024
-
-    # 先检查 Content-Length header（如果可用）
-    if file.size is not None and file.size > max_size_bytes:
-        raise HTTPException(
-            status_code=status.HTTP_413_REQUEST_ENTITY_TOO_LARGE,
-            detail=f"文件超过上传限制 ({settings.OSS_DIRECT_UPLOAD_MAX_MB}MB)",
-        )
-
-    # 读取文件内容并上传到 OSS
-    file_id = uuid4().hex[:8]
-    safe_filename = file.filename.replace("/", "_").replace("\\", "_")
-    storage_key = f"duplication/{file_id}/{safe_filename}"
-
-    try:
-        content = await file.read()
-        file_size = len(content)
-
-        # 再次检查实际文件大小
-        if file_size > max_size_bytes:
-            raise HTTPException(
-                status_code=status.HTTP_413_REQUEST_ENTITY_TOO_LARGE,
-                detail=f"文件超过上传限制 ({settings.OSS_DIRECT_UPLOAD_MAX_MB}MB)",
-            )
-    except HTTPException:
-        raise
-    except Exception as exc:
-        logger.error("读取查重文件失败: %s", exc, exc_info=True)
-        raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST,
-            detail="文件读取失败，请稍后重试",
-        ) from exc
-
-    try:
-        storage_service.upload_file(
-            content,
-            storage_key,
-            content_type=validated_content_type,
-        )
-    except Exception as exc:
-        logger.error("查重文件上传 OSS 失败: %s", exc, exc_info=True)
-        raise HTTPException(
-            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
-            detail="文件上传失败，请稍后重试",
-        ) from exc
-
-    use_case = UploadForDuplicationUseCase(duplication_repository)
-    record = use_case.execute(
-        UploadForDuplicationCommand(
-            user_id=authenticated_user.user.id,
-            filename=file.filename,
-            file_size=file_size,
-            storage_key=storage_key,
-        )
-    )
-
-    logger.info(
-        "Duplication upload: record=%s file=%s user=%s",
-        record.id,
-        file.filename,
-        authenticated_user.user.id,
-    )
-
-    return DuplicationUploadResponse(
-        id=record.id,
-        status=record.status,
-        message=f'文件 "{file.filename}" 已上传，正在查重中...',
-    )
-
-
-@router.get("/records", response_model=list[DuplicationRecordResponse])
-def list_duplication_records(
-    authenticated_user: AuthenticatedUser = Depends(get_current_user),
-    duplication_repository: Any = Depends(get_duplication_repository),
-) -> list[DuplicationRecordResponse]:
-    """获取当前用户的查重记录列表。"""
-    use_case = ListDuplicationRecordsUseCase(duplication_repository)
-    records = use_case.execute(authenticated_user.user.id)
-    return [_to_record_response(r) for r in records]
-
-
-@router.get("/records/{record_id}", response_model=DuplicationDetailResponse)
-def get_duplication_detail(
-    record_id: str,
-    authenticated_user: AuthenticatedUser = Depends(get_current_user),
-    duplication_repository: Any = Depends(get_duplication_repository),
-) -> DuplicationDetailResponse:
-    """获取查重记录详情（含重复片段）。"""
-    use_case = GetDuplicationDetailUseCase(duplication_repository)
-    record = use_case.execute(record_id)
-    if record is None:
-        raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND,
-            detail=f"查重记录 {record_id} 不存在",
-        )
-    if record.user_id != authenticated_user.user.id:
-        raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND,
-            detail=f"查重记录 {record_id} 不存在",
-        )
-    return _to_detail_response(record)
-
-
-@router.delete("/records/{record_id}", status_code=status.HTTP_204_NO_CONTENT, response_class=Response)
-def delete_duplication_record(
-    record_id: str,
-    authenticated_user: AuthenticatedUser = Depends(get_current_user),
-    duplication_repository: Any = Depends(get_duplication_repository),
-) -> Response:
-    """删除查重记录。"""
-    # 检查记录是否存在且属于当前用户
-    detail_uc = GetDuplicationDetailUseCase(duplication_repository)
-    record = detail_uc.execute(record_id)
-    if record is None or record.user_id != authenticated_user.user.id:
-        raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND,
-            detail=f"查重记录 {record_id} 不存在",
-        )
-
-    use_case = DeleteDuplicationRecordUseCase(duplication_repository)
-    use_case.execute(record_id)
-    return Response(status_code=204)
-
-
-@router.post("/records/{record_id}/retry", response_model=DuplicationUploadResponse)
-def retry_duplication(
-    record_id: str,
-    authenticated_user: AuthenticatedUser = Depends(get_current_user),
-    duplication_repository: Any = Depends(get_duplication_repository),
-) -> DuplicationUploadResponse:
-    """重新提交查重。"""
-    # 检查记录存在且属于当前用户
-    detail_uc = GetDuplicationDetailUseCase(duplication_repository)
-    record = detail_uc.execute(record_id)
-    if record is None or record.user_id != authenticated_user.user.id:
-        raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND,
-            detail=f"查重记录 {record_id} 不存在",
-        )
-
-    use_case = RetryDuplicationUseCase(duplication_repository)
-    updated = use_case.execute(record_id)
-    if updated is None:
-        raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND,
-            detail=f"查重记录 {record_id} 不存在",
-        )
-
-    return DuplicationUploadResponse(
-        id=updated.id,
-        status=updated.status,
-        message="已重新提交查重",
-    )
diff --git a/tests/integration/test_api_performance.py b/tests/integration/test_api_performance.py
index d7535cf32..2b9b30435 100644
--- a/tests/integration/test_api_performance.py
+++ b/tests/integration/test_api_performance.py
@@ -18,7 +18,6 @@ from __future__ import annotations
 
 import os
 import uuid
-from typing import Optional
 
 import pytest
 from fastapi.testclient import TestClient
diff --git a/tests/integration/test_duplication_api.py b/tests/integration/test_duplication_api.py
index 520eef14f..bdb57dd8d 100644
--- a/tests/integration/test_duplication_api.py
+++ b/tests/integration/test_duplication_api.py
@@ -14,7 +14,6 @@ from __future__ import annotations
 
 import os
 import sys
-from dataclasses import replace
 from datetime import datetime, timezone
 from typing import Any
 from unittest.mock import MagicMock
@@ -33,7 +32,7 @@ sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "apps", "
 from app.api.routes.duplication import router
 from app.auth import AuthenticatedUser, get_current_user
 from app.core.storage import get_storage_service
-from app.dependencies import get_db_session, get_duplication_repository
+from app.dependencies import get_duplication_repository
 
 from packages.domain.duplication import DuplicateSegment, DuplicationRecord
 
diff --git a/tests/integration/test_duplication_upload_error_handling.py b/tests/integration/test_duplication_upload_error_handling.py
index 358acbecd..9930e401d 100644
--- a/tests/integration/test_duplication_upload_error_handling.py
+++ b/tests/integration/test_duplication_upload_error_handling.py
@@ -32,11 +32,9 @@ sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "apps", "
 
 from app.api.routes.duplication import _validate_video_mime_type, router
 from app.auth import AuthenticatedUser, get_current_user
-from app.core.storage import OSSStorageService, get_storage_service
+from app.core.storage import get_storage_service
 from app.dependencies import get_duplication_repository
 
-from packages.domain.duplication import DuplicationRecord
-
 # ── 导入真实模块（不创建 fake module） ────────────────────────────────────────
 from packages.domain.entities import User
 
diff --git a/tests/integration/test_error_scenarios.py b/tests/integration/test_error_scenarios.py
index 4f8bc06cf..f11e36504 100755
--- a/tests/integration/test_error_scenarios.py
+++ b/tests/integration/test_error_scenarios.py
@@ -14,7 +14,6 @@
 
 from __future__ import annotations
 
-import json
 import os
 import sys
 import uuid
diff --git a/tests/integration/test_full_pipeline.py b/tests/integration/test_full_pipeline.py
index 36059c7e9..92224ef53 100644
--- a/tests/integration/test_full_pipeline.py
+++ b/tests/integration/test_full_pipeline.py
@@ -9,16 +9,12 @@ import shutil
 import subprocess
 import tempfile
 from pathlib import Path
-from unittest.mock import MagicMock, patch
 
 import pytest
 from video_processing.unified_render_service import (
-    RenderResult,
     UnifiedRenderService,
 )
 from worker_app.tasks.generation import (
-    OUTPUT_HEIGHT,
-    OUTPUT_WIDTH,
     _build_plan_and_clips_from_task,
     _create_fallback_clip,
     _mux_audio_track,
diff --git a/tests/integration/test_generation_api.py b/tests/integration/test_generation_api.py
index 5a609d7af..17256c7ef 100755
--- a/tests/integration/test_generation_api.py
+++ b/tests/integration/test_generation_api.py
@@ -515,7 +515,6 @@ class TestRetryGenerationTask:
             task_id = resp.json()["items"][0]["id"]
 
         # 直接修改 repository 中的任务状态为 failed
-        from app.dependencies import get_generation_task_repository
 
         # 由于是 stub，我们需要通过另一种方式设置状态
         # 让我们直接通过 retry 测试来验证
diff --git a/tests/integration/test_ingest_pipeline.py b/tests/integration/test_ingest_pipeline.py
index c424975e5..7c630d330 100644
--- a/tests/integration/test_ingest_pipeline.py
+++ b/tests/integration/test_ingest_pipeline.py
@@ -3,7 +3,7 @@ from packages.adapters.in_memory import (
     InMemoryIngestJobRepository,
 )
 from packages.application import SubmitIngestJobCommand, SubmitIngestJobUseCase
-from packages.domain import Asset, IngestJob, IngestJobStatus
+from packages.domain import Asset, IngestJobStatus
 
 
 def simulate_ingest_asset(
diff --git a/tests/integration/test_project_management.py b/tests/integration/test_project_management.py
deleted file mode 100644
index c164101c1..000000000
--- a/tests/integration/test_project_management.py
+++ /dev/null
@@ -1,263 +0,0 @@
-"""项目管理功能集成测试"""
-
-import pytest
-
-# 项目管理功能尚未实现，相关模块不存在，跳过整个文件
-pytest.skip(
-    "项目管理功能尚未实现（project_management_repositories / "
-    "project_management_use_cases / TaskPriority / TaskStatus 均不存在）",
-    allow_module_level=True,
-)
-
-from packages.adapters.in_memory.project_management_repositories import (
-    InMemoryMilestoneRepository,
-    InMemoryTaskIssueRepository,
-    InMemoryTaskRepository,
-)
-from packages.application.project_management_use_cases import (
-    CreateMilestoneUseCase,
-    CreateTaskIssueUseCase,
-    CreateTaskUseCase,
-    ListProjectTasksUseCase,
-    ListTaskIssuesUseCase,
-    ResolveTaskIssueUseCase,
-    UpdateTaskProgressUseCase,
-    UpdateTaskStatusUseCase,
-)
-from packages.domain import TaskPriority, TaskStatus
-
-
-def test_create_task():
-    """测试创建任务"""
-    repo = InMemoryTaskRepository()
-    use_case = CreateTaskUseCase(repo)
-
-    task = use_case.execute(
-        project_id="proj_1",
-        name="开发登录功能",
-        description="实现用户登录功能",
-        priority=TaskPriority.HIGH,
-    )
-
-    assert task.id is not None
-    assert task.name == "开发登录功能"
-    assert task.status == TaskStatus.PENDING
-    assert task.priority == TaskPriority.HIGH
-    assert task.progress == 0.0
-
-
-def test_list_tasks():
-    """测试获取任务列表"""
-    repo = InMemoryTaskRepository()
-    create_use_case = CreateTaskUseCase(repo)
-
-    # 创建两个任务
-    create_use_case.execute(
-        project_id="proj_1",
-        name="任务1",
-    )
-    create_use_case.execute(
-        project_id="proj_1",
-        name="任务2",
-    )
-
-    # 查询任务列表
-    list_use_case = ListProjectTasksUseCase(repo)
-    tasks = list_use_case.execute("proj_1")
-
-    assert len(tasks) == 2
-    assert tasks[0].name == "任务1"
-    assert tasks[1].name == "任务2"
-
-
-def test_update_task_status():
-    """测试更新任务状态"""
-    repo = InMemoryTaskRepository()
-    create_use_case = CreateTaskUseCase(repo)
-    update_use_case = UpdateTaskStatusUseCase(repo)
-
-    # 创建任务
-    task = create_use_case.execute(
-        project_id="proj_1",
-        name="测试任务",
-    )
-
-    # 更新状态为进行中
-    updated_task = update_use_case.execute(task.id, TaskStatus.IN_PROGRESS)
-
-    assert updated_task.status == TaskStatus.IN_PROGRESS
-    assert updated_task.actual_start_date is not None
-
-
-def test_update_task_progress():
-    """测试更新任务进度"""
-    repo = InMemoryTaskRepository()
-    create_use_case = CreateTaskUseCase(repo)
-    progress_use_case = UpdateTaskProgressUseCase(repo)
-
-    # 创建任务
-    task = create_use_case.execute(
-        project_id="proj_1",
-        name="测试任务",
-    )
-
-    # 更新进度到 50%
-    updated_task = progress_use_case.execute(task.id, 50.0)
-
-    assert updated_task.progress == 50.0
-    assert updated_task.status == TaskStatus.IN_PROGRESS
-
-    # 更新进度到 100%
-    completed_task = progress_use_case.execute(task.id, 100.0)
-
-    assert completed_task.progress == 100.0
-    assert completed_task.status == TaskStatus.COMPLETED
-    assert completed_task.actual_end_date is not None
-
-
-def test_create_milestone():
-    """测试创建里程碑"""
-    repo = InMemoryMilestoneRepository()
-    use_case = CreateMilestoneUseCase(repo)
-
-    milestone = use_case.execute(
-        project_id="proj_1",
-        name="V1.0 发布",
-        description="第一个正式版本",
-    )
-
-    assert milestone.id is not None
-    assert milestone.name == "V1.0 发布"
-    assert milestone.completed is False
-
-
-def test_create_and_resolve_issue():
-    """测试创建和解决任务问题"""
-    repo = InMemoryTaskIssueRepository()
-    create_use_case = CreateTaskIssueUseCase(repo)
-    resolve_use_case = ResolveTaskIssueUseCase(repo)
-    list_use_case = ListTaskIssuesUseCase(repo)
-
-    # 创建问题
-    issue = create_use_case.execute(
-        task_id="task_1",
-        project_id="proj_1",
-        title="接口报错",
-        description="调用登录接口返回 500",
-    )
-
-    assert issue.id is not None
-    assert issue.title == "接口报错"
-    assert issue.resolved is False
-
-    # 解决问题
-    resolved_issue = resolve_use_case.execute(issue.id)
-
-    assert resolved_issue.resolved is True
-    assert resolved_issue.resolved_at is not None
-
-    # 查询任务问题列表
-    issues = list_use_case.execute("task_1")
-    assert len(issues) == 1
-    assert issues[0].resolved is True
-
-
-def test_task_hierarchy():
-    """测试任务层级关系"""
-    repo = InMemoryTaskRepository()
-    create_use_case = CreateTaskUseCase(repo)
-
-    # 创建父任务
-    parent_task = create_use_case.execute(
-        project_id="proj_1",
-        name="开发用户模块",
-    )
-
-    # 创建子任务
-    child_task_1 = create_use_case.execute(
-        project_id="proj_1",
-        name="登录功能",
-        parent_task_id=parent_task.id,
-    )
-
-    child_task_2 = create_use_case.execute(
-        project_id="proj_1",
-        name="注册功能",
-        parent_task_id=parent_task.id,
-    )
-
-    # 查询子任务
-    children = repo.list_by_parent(parent_task.id)
-
-    assert len(children) == 2
-    assert children[0].parent_task_id == parent_task.id
-    assert children[1].parent_task_id == parent_task.id
-
-
-def test_get_task_detail():
-    """测试获取任务详情"""
-    from packages.application.get_task_detail_use_case import GetTaskDetailUseCase
-
-    repo = InMemoryTaskRepository()
-    create_use_case = CreateTaskUseCase(repo)
-    get_use_case = GetTaskDetailUseCase(repo)
-
-    # 创建任务
-    task = create_use_case.execute(
-        project_id="proj_1",
-        name="测试任务",
-        description="这是一个测试任务",
-    )
-
-    # 获取详情
-    retrieved_task = get_use_case.execute(task.id)
-
-    assert retrieved_task.id == task.id
-    assert retrieved_task.name == "测试任务"
-    assert retrieved_task.description == "这是一个测试任务"
-
-    # 测试不存在的任务
-    try:
-        get_use_case.execute("nonexistent_id")
-        assert False, "应该抛出异常"
-    except ValueError as e:
-        assert "not found" in str(e)
-
-
-def test_update_task():
-    """测试任务基本信息更新"""
-    from packages.application.update_task_use_case import UpdateTaskUseCase
-
-    repo = InMemoryTaskRepository()
-    create_use_case = CreateTaskUseCase(repo)
-    update_use_case = UpdateTaskUseCase(repo)
-
-    # 创建任务
-    task = create_use_case.execute(
-        project_id="proj_1",
-        name="原始任务",
-        description="原始描述",
-        priority="low",
-    )
-
-    # 更新任务
-    updated_task = update_use_case.execute(
-        task_id=task.id,
-        name="更新后的任务",
-        description="更新后的描述",
-        priority="high",
-    )
-
-    assert updated_task.name == "更新后的任务"
-    assert updated_task.description == "更新后的描述"
-    assert updated_task.priority == "high"
-
-    # 部分更新
-    partial_updated = update_use_case.execute(
-        task_id=task.id,
-        name="又更新了",
-    )
-
-    assert partial_updated.name == "又更新了"
-    assert partial_updated.description == "更新后的描述"  # 保持不变
-    assert partial_updated.priority == "high"  # 保持不变
diff --git a/tests/integration/test_subscription_api.py b/tests/integration/test_subscription_api.py
index 1beb29f7e..d462d5c59 100644
--- a/tests/integration/test_subscription_api.py
+++ b/tests/integration/test_subscription_api.py
@@ -16,7 +16,6 @@ from __future__ import annotations
 import importlib.util
 import os
 import sys
-from dataclasses import dataclass, field
 from datetime import datetime, timezone
 from typing import Optional
 
@@ -30,12 +29,10 @@ from fastapi.testclient import TestClient
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "apps", "api"))
 
-from app.auth import AuthenticatedUser, get_current_user
-from app.dependencies import get_user_repository
+from app.auth import AuthenticatedUser
 
 # ── 导入真实模块（不创建 fake module） ────────────────────────────────────────
 from packages.domain.entities import User
-from packages.ports.user_repository import UserRepository
 
 # ── 导入被测路由模块（从 fixtures 加载简化版路由） ─────────────────────────────
 _fixture_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), "fixtures", "subscription_routes.py")
diff --git a/tests/integration/test_task_center_api.py b/tests/integration/test_task_center_api.py
index bec726186..a55f5b2ee 100755
--- a/tests/integration/test_task_center_api.py
+++ b/tests/integration/test_task_center_api.py
@@ -629,7 +629,6 @@ class TestTaskCenterCrossEndpoint:
         # 2. 重试失败任务
         retry_resp = tc.post("/tasks/gen-fail-cross/retry")
         assert retry_resp.status_code == 200
-        new_task_id = retry_resp.json()["source_id"]
 
         # 3. 再次列出，应有2个任务（旧的failed + 新的pending）
         list_resp2 = tc.get("/tasks")
diff --git a/tests/integration/test_tts_api.py b/tests/integration/test_tts_api.py
index 69d6e5587..63e065b0c 100644
--- a/tests/integration/test_tts_api.py
+++ b/tests/integration/test_tts_api.py
@@ -18,7 +18,6 @@ from __future__ import annotations
 import os
 import sys
 from datetime import datetime, timezone
-from unittest.mock import MagicMock
 
 # ── 环境变量 & sys.path（必须在导入 app.* 之前设置） ──────────────────────────
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
diff --git a/tests/integration/test_voice_clone_api.py b/tests/integration/test_voice_clone_api.py
index 86f9a219a..a63d402c1 100755
--- a/tests/integration/test_voice_clone_api.py
+++ b/tests/integration/test_voice_clone_api.py
@@ -18,7 +18,6 @@ from __future__ import annotations
 import os
 import sys
 from datetime import datetime, timezone
-from unittest.mock import MagicMock
 
 # ── 环境变量 & sys.path（必须在导入 app.* 之前设置） ──────────────────────────
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
diff --git a/tests/render_compare/audio_diff.py b/tests/render_compare/audio_diff.py
index d9e5013da..e0d069255 100644
--- a/tests/render_compare/audio_diff.py
+++ b/tests/render_compare/audio_diff.py
@@ -181,7 +181,7 @@ def compute_audio_diff(
             timeout=120,
         )
         stderr = result.stderr or ""
-    except subprocess.CalledProcessError as e:
+    except subprocess.CalledProcessError:
         # 如果音频格式不兼容，返回失败
         return AudioDiffResult(
             audio_a=str(audio_a),
diff --git a/tests/render_compare/runner.py b/tests/render_compare/runner.py
index 393908382..433984ae7 100644
--- a/tests/render_compare/runner.py
+++ b/tests/render_compare/runner.py
@@ -30,7 +30,7 @@ import json
 import os
 import sys
 import time
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from datetime import datetime
 from pathlib import Path
 from typing import Any
@@ -403,9 +403,6 @@ def generate_html_report(summary: dict[str, Any], output_path: Path):
     scenarios = summary["scenarios"]
 
     # 按通过/失败分组
-    passed_list = [s for s in scenarios if s["passed"]]
-    failed_list = [s for s in scenarios if not s["passed"]]
-
     # 构建场景卡片
     scenario_cards = ""
     for s in scenarios:
diff --git a/tests/unit/test_asset_diagnosis.py b/tests/unit/test_asset_diagnosis.py
index 270e84be8..3e0085742 100644
--- a/tests/unit/test_asset_diagnosis.py
+++ b/tests/unit/test_asset_diagnosis.py
@@ -1,7 +1,6 @@
 import os
 import sys
 from pathlib import Path
-from uuid import uuid4
 
 # 设置必要环境变量（必须在导入 app 模块之前）
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
@@ -9,7 +8,6 @@ os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
 
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
 
-import pytest
 from app.api.routes.asset_diagnosis import _build_diagnosis
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
diff --git a/tests/unit/test_asset_library_delete.py b/tests/unit/test_asset_library_delete.py
index 648dcafa4..9c4178be6 100644
--- a/tests/unit/test_asset_library_delete.py
+++ b/tests/unit/test_asset_library_delete.py
@@ -13,7 +13,6 @@ from __future__ import annotations
 import os
 import sys
 from pathlib import Path
-from unittest.mock import MagicMock
 
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
 os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
diff --git a/tests/unit/test_asset_tagging.py b/tests/unit/test_asset_tagging.py
index 2b36b40a4..436c1df98 100644
--- a/tests/unit/test_asset_tagging.py
+++ b/tests/unit/test_asset_tagging.py
@@ -86,7 +86,7 @@ def test_find_by_tag_ids(asset_repo, tag_repo):
     a2.add_tag(tag1.id)
     asset_repo.update(a2)
 
-    a3 = _create_asset(asset_repo, name="c.mp4")
+    _create_asset(asset_repo, name="c.mp4")
     # 无标签
 
     # 按 tag1 筛选 → a1, a2
diff --git a/tests/unit/test_audio_url_presign.py b/tests/unit/test_audio_url_presign.py
index df5035876..75f8f08f2 100755
--- a/tests/unit/test_audio_url_presign.py
+++ b/tests/unit/test_audio_url_presign.py
@@ -8,8 +8,6 @@ from __future__ import annotations
 
 from unittest.mock import MagicMock, patch
 
-import pytest
-
 
 class TestAudioUrlSigner:
     """测试音频URL签名函数的行为。"""
diff --git a/tests/unit/test_auto_clip_service.py b/tests/unit/test_auto_clip_service.py
index 25b8b1ebc..2d39ca880 100644
--- a/tests/unit/test_auto_clip_service.py
+++ b/tests/unit/test_auto_clip_service.py
@@ -10,10 +10,9 @@ sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
 from dataclasses import dataclass, field
 from enum import Enum
 from typing import Any
-from unittest.mock import MagicMock
 
 import pytest
-from app.services.auto_clip_service import AutoClipService, ClipAssignDetail
+from app.services.auto_clip_service import AutoClipService
 
 # ── Stub 实体 ─────────────────────────────────────────────────────────────────
 
diff --git a/tests/unit/test_chunked_upload_routes.py b/tests/unit/test_chunked_upload_routes.py
index 4c48bcd25..438168db6 100644
--- a/tests/unit/test_chunked_upload_routes.py
+++ b/tests/unit/test_chunked_upload_routes.py
@@ -20,7 +20,6 @@ from unittest.mock import MagicMock
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
 os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
 
-import pytest
 
 # 确保 app 模块可导入
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
diff --git a/tests/unit/test_config_oss.py b/tests/unit/test_config_oss.py
index c1679d6e9..0ddcad23e 100644
--- a/tests/unit/test_config_oss.py
+++ b/tests/unit/test_config_oss.py
@@ -12,12 +12,9 @@ from __future__ import annotations
 
 import importlib.util
 import os
-import sys
 from pathlib import Path
 from unittest.mock import patch
 
-import pytest
-
 
 def _load_settings_class():
     """
diff --git a/tests/unit/test_config_schemas_and_ai_endpoints.py b/tests/unit/test_config_schemas_and_ai_endpoints.py
index bbb5825ad..b2f2ee2dd 100644
--- a/tests/unit/test_config_schemas_and_ai_endpoints.py
+++ b/tests/unit/test_config_schemas_and_ai_endpoints.py
@@ -15,9 +15,8 @@ from __future__ import annotations
 
 import os
 import sys
-from datetime import datetime, timezone
 from pathlib import Path
-from typing import Any, Optional
+from typing import Any
 from unittest.mock import MagicMock
 
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
@@ -41,7 +40,7 @@ class TestNormalizePlanConfig:
         assert result == DEFAULT_EDIT_PLAN_CONFIG.copy()
 
     def test_empty_dict_returns_full_defaults(self):
-        from packages.domain.config_schemas import DEFAULT_EDIT_PLAN_CONFIG, normalize_plan_config
+        from packages.domain.config_schemas import normalize_plan_config
 
         result = normalize_plan_config({})
         assert result["cover"]["type"] == "ai_frame"
@@ -363,7 +362,7 @@ def _create_ai_test_app():
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
 
-from packages.domain.edit_plan import EditPlan, EditPlanStatus
+from packages.domain.edit_plan import EditPlan
 
 
 @pytest.fixture
diff --git a/tests/unit/test_cosyvoice_service.py b/tests/unit/test_cosyvoice_service.py
index 764033338..9cc9a43fb 100755
--- a/tests/unit/test_cosyvoice_service.py
+++ b/tests/unit/test_cosyvoice_service.py
@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import json
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 
 import httpx
 import pytest
diff --git a/tests/unit/test_dedup_engine.py b/tests/unit/test_dedup_engine.py
index 5b7e17633..2b8b2a656 100644
--- a/tests/unit/test_dedup_engine.py
+++ b/tests/unit/test_dedup_engine.py
@@ -37,13 +37,10 @@ if "worker_app.celery_app" in sys.modules and isinstance(sys.modules["worker_app
 if "worker_app.db" in sys.modules and isinstance(sys.modules["worker_app.db"], MagicMock):
     sys.modules["worker_app.db"].SessionLocal = MagicMock()
 
-# Mock celery.Task base class — 仅在 celery 不可用时注入 mock，避免污染真实包
-try:
-    import celery as _real_celery  # noqa: F401
-except ImportError:
-    _mock_if_absent("celery", MagicMock())
-    if "celery" in sys.modules and isinstance(sys.modules["celery"], MagicMock):
-        sys.modules["celery"].Task = object
+# Mock celery.Task base class
+_mock_if_absent("celery", MagicMock())
+if "celery" in sys.modules and isinstance(sys.modules["celery"], MagicMock):
+    sys.modules["celery"].Task = object
 
 # Mock packages.shared.storage
 _mock_if_absent("packages.shared")
diff --git a/tests/unit/test_duplication_use_cases.py b/tests/unit/test_duplication_use_cases.py
index 2d474a32c..66393a4ec 100644
--- a/tests/unit/test_duplication_use_cases.py
+++ b/tests/unit/test_duplication_use_cases.py
@@ -22,7 +22,7 @@ from packages.application.duplication import (
     UploadForDuplicationCommand,
     UploadForDuplicationUseCase,
 )
-from packages.domain.duplication import DuplicateSegment, DuplicationRecord
+from packages.domain.duplication import DuplicationRecord
 
 
 def _make_record(status="pending", **kwargs):
diff --git a/tests/unit/test_edit_plan_generation_api.py b/tests/unit/test_edit_plan_generation_api.py
index b7ee3c545..8f05cd720 100755
--- a/tests/unit/test_edit_plan_generation_api.py
+++ b/tests/unit/test_edit_plan_generation_api.py
@@ -12,7 +12,6 @@ from __future__ import annotations
 import os
 import sys
 from dataclasses import dataclass, field
-from datetime import datetime, timezone
 from typing import Any, Optional
 from unittest.mock import MagicMock, patch
 
diff --git a/tests/unit/test_edit_plan_worker_failure.py b/tests/unit/test_edit_plan_worker_failure.py
index aad74f916..00c33b163 100755
--- a/tests/unit/test_edit_plan_worker_failure.py
+++ b/tests/unit/test_edit_plan_worker_failure.py
@@ -13,7 +13,6 @@ from __future__ import annotations
 import os
 import sys
 from dataclasses import dataclass, field
-from datetime import datetime, timezone
 from types import ModuleType
 from typing import Any, Optional
 from unittest.mock import MagicMock, patch
@@ -176,7 +175,6 @@ class TestRenderEditPlanFailureUpdatesGenTask:
         gen_task = StubGenerationTask(id="gen-task-001", status=_StubStatus("running"))
 
         plan_repo = StubPlanRepo(plan)
-        clip_repo = StubClipRepo([])
         gen_task_repo = StubGenTaskRepo(gen_task)
 
         # 让 clip_repo 抛异常以触发 except 路径
diff --git a/tests/unit/test_edit_plans_api.py b/tests/unit/test_edit_plans_api.py
index c8ba3a78b..997236010 100644
--- a/tests/unit/test_edit_plans_api.py
+++ b/tests/unit/test_edit_plans_api.py
@@ -13,7 +13,6 @@ from __future__ import annotations
 
 import os
 import sys
-from datetime import datetime, timezone
 from pathlib import Path
 from typing import Optional
 from unittest.mock import MagicMock
diff --git a/tests/unit/test_edit_template_service.py b/tests/unit/test_edit_template_service.py
index f467ba5a7..b2cbbbd0c 100644
--- a/tests/unit/test_edit_template_service.py
+++ b/tests/unit/test_edit_template_service.py
@@ -16,8 +16,8 @@ import os
 import sys
 from datetime import datetime, timezone
 from pathlib import Path
-from typing import Any, List, Optional
-from unittest.mock import MagicMock, patch
+from typing import List, Optional
+from unittest.mock import MagicMock
 
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
 os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
@@ -27,7 +27,7 @@ import pytest
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
 
 from packages.domain.edit_template import EditTemplate, EditTemplateStatus
-from packages.domain.template_clip_config import ClipType, TemplateClipConfig, TransitionEffect
+from packages.domain.template_clip_config import ClipType, TemplateClipConfig
 
 # ---------------------------------------------------------------------------
 # Stub Repositories
@@ -273,7 +273,7 @@ class TestEditTemplateServiceCRUD:
 
     def test_list_templates_active_only(self):
         svc = _make_service()
-        t1 = svc.create_template(name="活跃")
+        svc.create_template(name="活跃")
         t2 = svc.create_template(name="停用")
         svc.deactivate_template(t2.id)
         result = svc.list_templates(active_only=True)
diff --git a/tests/unit/test_email_service.py b/tests/unit/test_email_service.py
index 08b97b4f8..228d1c3ff 100644
--- a/tests/unit/test_email_service.py
+++ b/tests/unit/test_email_service.py
@@ -2,7 +2,7 @@
 邮件服务测试
 """
 
-from unittest.mock import MagicMock, Mock, patch
+from unittest.mock import MagicMock, patch
 
 import pytest
 
diff --git a/tests/unit/test_feature_flag.py b/tests/unit/test_feature_flag.py
index 81cddd67a..a349cc3b2 100755
--- a/tests/unit/test_feature_flag.py
+++ b/tests/unit/test_feature_flag.py
@@ -5,10 +5,8 @@
 
 from __future__ import annotations
 
-import time
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 
-import pytest
 
 from packages.adapters.redis.feature_flag_store import (
     FeatureFlagConfig,
@@ -337,7 +335,6 @@ class TestRedisStoreDegradation:
 
     def test_get_returns_default_when_redis_unavailable(self):
         """Redis 连接失败时返回默认关闭配置，不抛异常。"""
-        import importlib
 
         from packages.adapters.redis import feature_flag_store as ff_module
 
@@ -358,7 +355,6 @@ class TestRedisStoreDegradation:
 
     def test_list_all_returns_empty_on_redis_error(self):
         """Redis 错误时 list_all 返回空字典。"""
-        import importlib
 
         from packages.adapters.redis import feature_flag_store as ff_module
 
diff --git a/tests/unit/test_form_upload_routes.py b/tests/unit/test_form_upload_routes.py
index e3b8c6161..cc4c2239f 100644
--- a/tests/unit/test_form_upload_routes.py
+++ b/tests/unit/test_form_upload_routes.py
@@ -21,7 +21,6 @@ from unittest.mock import MagicMock
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
 os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
 
-import pytest
 
 # 确保 app 模块可导入
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
diff --git a/tests/unit/test_generation_feature_flag.py b/tests/unit/test_generation_feature_flag.py
index e3f92c4fb..5c743a598 100644
--- a/tests/unit/test_generation_feature_flag.py
+++ b/tests/unit/test_generation_feature_flag.py
@@ -11,18 +11,14 @@ from __future__ import annotations
 
 import os
 import sys
-from datetime import datetime, timezone
 from types import ModuleType
-from typing import Any
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
 os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
 
 from pathlib import Path
 
-import pytest
-
 # ── Mock worker 模块以避免数据库连接 ──────────────────────────────────────────
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "apps", "worker"))
@@ -226,8 +222,6 @@ def test_legacy_engine_two_clips_concat_duration():
     import subprocess
     import tempfile
 
-    from video_processing.ffmpeg_utils import probe_duration
-
     from apps.worker.worker_app.tasks.generation import _render_with_legacy_engine
 
     with tempfile.TemporaryDirectory() as tmpdir:
diff --git a/tests/unit/test_generation_logging.py b/tests/unit/test_generation_logging.py
index 13bdd5497..7d4d1b373 100644
--- a/tests/unit/test_generation_logging.py
+++ b/tests/unit/test_generation_logging.py
@@ -17,7 +17,7 @@ from __future__ import annotations
 import json
 import sys
 from pathlib import Path
-from unittest.mock import MagicMock, patch
+from unittest.mock import patch
 
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "worker"))
diff --git a/tests/unit/test_generation_presigned_url.py b/tests/unit/test_generation_presigned_url.py
index 8a93983d9..d22088206 100755
--- a/tests/unit/test_generation_presigned_url.py
+++ b/tests/unit/test_generation_presigned_url.py
@@ -12,7 +12,7 @@ from __future__ import annotations
 import os
 import sys
 from pathlib import Path
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
 os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
diff --git a/tests/unit/test_job_service.py b/tests/unit/test_job_service.py
index 74c51967b..ea2fa9b99 100755
--- a/tests/unit/test_job_service.py
+++ b/tests/unit/test_job_service.py
@@ -429,7 +429,7 @@ class TestListJobsUseCase:
 
     def test_list_by_project_with_status_filter(self, repo):
         create_uc = CreateJobUseCase(repo)
-        j1 = create_uc.execute(CreateJobCommand(project_id="proj-1", job_type=JobType.VIDEO_COMPOSE))
+        create_uc.execute(CreateJobCommand(project_id="proj-1", job_type=JobType.VIDEO_COMPOSE))
         j2 = create_uc.execute(CreateJobCommand(project_id="proj-1", job_type=JobType.VIDEO_COMPOSE))
         j2.mark_running()
         repo.update(j2)
@@ -460,7 +460,7 @@ class TestListJobsUseCase:
 class TestGetJobStatisticsUseCase:
     def test_statistics(self, repo):
         create_uc = CreateJobUseCase(repo)
-        j1 = create_uc.execute(CreateJobCommand(project_id="proj-1", job_type=JobType.VIDEO_COMPOSE))
+        create_uc.execute(CreateJobCommand(project_id="proj-1", job_type=JobType.VIDEO_COMPOSE))
         j2 = create_uc.execute(CreateJobCommand(project_id="proj-1", job_type=JobType.VIDEO_COMPOSE))
         j2.mark_running()
         repo.update(j2)
diff --git a/tests/unit/test_oss_upload_crash_fix.py b/tests/unit/test_oss_upload_crash_fix.py
index cb47cc8cd..806e9b4cf 100755
--- a/tests/unit/test_oss_upload_crash_fix.py
+++ b/tests/unit/test_oss_upload_crash_fix.py
@@ -15,8 +15,6 @@ import time
 from pathlib import Path
 from unittest.mock import MagicMock, patch
 
-import pytest
-
 # ── oss_bucket connect_timeout 测试 ───────────────────────────────────────────
 
 
diff --git a/tests/unit/test_p02_p03_fixes.py b/tests/unit/test_p02_p03_fixes.py
index dddb6b097..5f96080b8 100644
--- a/tests/unit/test_p02_p03_fixes.py
+++ b/tests/unit/test_p02_p03_fixes.py
@@ -9,7 +9,6 @@ from __future__ import annotations
 import logging
 from unittest.mock import MagicMock, patch
 
-import pytest
 from video_processing.ffmpeg_utils import build_xfade_filter_chain
 
 # ── P0-3: build_xfade_filter_chain 安全钳制 ──────────────────────────────────
diff --git a/tests/unit/test_p02_worker_oss_fix.py b/tests/unit/test_p02_worker_oss_fix.py
index f76d3679c..58f7d37fd 100755
--- a/tests/unit/test_p02_worker_oss_fix.py
+++ b/tests/unit/test_p02_worker_oss_fix.py
@@ -11,8 +11,6 @@ from __future__ import annotations
 import os
 from unittest.mock import MagicMock, patch
 
-import pytest
-
 # ── oss_bucket endpoint scheme 修复 ──────────────────────────────────────────
 
 
@@ -34,11 +32,10 @@ class TestOSSBucketEndpointScheme:
                     "OSS_BUCKET_NAME": "test-bucket",
                 },
             ),
-            patch("video_processing.oss_helpers.oss2.Auth") as mock_auth,
+            patch("video_processing.oss_helpers.oss2.Auth"),
             patch("video_processing.oss_helpers.oss2.Bucket", return_value=mock_bucket_instance) as mock_bucket_cls,
         ):
             # 清除缓存，确保重新创建
-            import video_processing.oss_helpers as oss_mod
 
             bucket = oss_bucket()
 
@@ -67,9 +64,8 @@ class TestOSSBucketEndpointScheme:
             patch("video_processing.oss_helpers.oss2.Auth"),
             patch("video_processing.oss_helpers.oss2.Bucket", return_value=mock_bucket_instance) as mock_bucket_cls,
         ):
-            import video_processing.oss_helpers as oss_mod
 
-            bucket = oss_bucket()
+            oss_bucket()
 
             call_args = mock_bucket_cls.call_args
             endpoint_arg = call_args[0][1]
@@ -95,9 +91,8 @@ class TestOSSBucketEndpointScheme:
             patch("video_processing.oss_helpers.oss2.Auth"),
             patch("video_processing.oss_helpers.oss2.Bucket", return_value=mock_bucket_instance) as mock_bucket_cls,
         ):
-            import video_processing.oss_helpers as oss_mod
 
-            bucket = oss_bucket()
+            oss_bucket()
 
             call_args = mock_bucket_cls.call_args
             endpoint_arg = call_args[0][1]
@@ -117,7 +112,6 @@ class TestOSSBucketEndpointScheme:
             },
             clear=True,
         ):
-            import video_processing.oss_helpers as oss_mod
 
             bucket = oss_bucket()
             assert bucket is None
@@ -177,7 +171,7 @@ class TestGetSignedDownloadUrl:
             patch("video_processing.oss_helpers.oss2.Auth"),
             patch("video_processing.oss_helpers.oss2.Bucket", return_value=mock_bucket),
         ):
-            result = get_signed_download_url("https://test-bucket.oss-cn-hangzhou.aliyuncs.com/generated/test.mp4")
+            get_signed_download_url("https://test-bucket.oss-cn-hangzhou.aliyuncs.com/generated/test.mp4")
 
             mock_bucket.sign_url.assert_called_once()
             # 验证传给 sign_url 的是纯 storage key，不是完整 URL
diff --git a/tests/unit/test_phase8_clip_models.py b/tests/unit/test_phase8_clip_models.py
index 236955e55..6ef807281 100644
--- a/tests/unit/test_phase8_clip_models.py
+++ b/tests/unit/test_phase8_clip_models.py
@@ -300,7 +300,7 @@ from sqlalchemy.orm import sessionmaker
 from packages.adapters.sqlalchemy_impl.edit_plan_clip_repository import (
     SQLAlchemyEditPlanClipRepository,
 )
-from packages.adapters.sqlalchemy_impl.models import Base, EditPlanClipModel, TemplateClipConfigModel
+from packages.adapters.sqlalchemy_impl.models import Base
 from packages.adapters.sqlalchemy_impl.template_clip_config_repository import (
     SQLAlchemyTemplateClipConfigRepository,
 )
diff --git a/tests/unit/test_phase8_edit_models.py b/tests/unit/test_phase8_edit_models.py
index 838170e7f..6e5b1e0e1 100644
--- a/tests/unit/test_phase8_edit_models.py
+++ b/tests/unit/test_phase8_edit_models.py
@@ -8,7 +8,7 @@ sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
 import logging
 
 from sqlalchemy import create_engine
-from sqlalchemy.orm import Session, sessionmaker
+from sqlalchemy.orm import sessionmaker
 
 from packages.adapters.sqlalchemy_impl.edit_plan_repository import (
     SQLAlchemyEditPlanRepository,
diff --git a/tests/unit/test_plan_generator.py b/tests/unit/test_plan_generator.py
index d4838ba5f..6599df932 100644
--- a/tests/unit/test_plan_generator.py
+++ b/tests/unit/test_plan_generator.py
@@ -16,13 +16,12 @@ import os
 import sys
 from datetime import datetime, timezone
 from pathlib import Path
-from typing import Any, List, Optional
+from typing import List, Optional
 from unittest.mock import MagicMock, patch
 
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
 os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
 
-import pytest
 
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
 
diff --git a/tests/unit/test_render_adapter.py b/tests/unit/test_render_adapter.py
index 6f1e05a8e..7d6ff9736 100755
--- a/tests/unit/test_render_adapter.py
+++ b/tests/unit/test_render_adapter.py
@@ -6,12 +6,10 @@
 from __future__ import annotations
 
 from dataclasses import dataclass, field
-from pathlib import Path
 from typing import Any
 from unittest.mock import MagicMock, patch
 
-import pytest
-from video_processing.render_adapter import RenderAdapter, RenderAdapterResult
+from video_processing.render_adapter import RenderAdapter
 
 # ── Fixtures ──────────────────────────────────────────────────────────────────
 
@@ -318,7 +316,7 @@ class TestRenderPlan:
             def progress_cb(progress: float, stage: str) -> None:
                 progress_values.append((progress, stage))
 
-            result = adapter.render_plan(
+            adapter.render_plan(
                 "plan_001",
                 work_dir=tmp_path / "work",
                 progress_cb=progress_cb,
diff --git a/tests/unit/test_session_store.py b/tests/unit/test_session_store.py
index 44c8392a2..389aaedd2 100644
--- a/tests/unit/test_session_store.py
+++ b/tests/unit/test_session_store.py
@@ -3,8 +3,7 @@ Redis Session 存储测试
 """
 
 import json
-from datetime import datetime
-from unittest.mock import MagicMock, Mock
+from unittest.mock import Mock
 
 import pytest
 
diff --git a/tests/unit/test_strenum_deserialization.py b/tests/unit/test_strenum_deserialization.py
index d02e35123..8f3275560 100644
--- a/tests/unit/test_strenum_deserialization.py
+++ b/tests/unit/test_strenum_deserialization.py
@@ -14,7 +14,6 @@ from unittest.mock import MagicMock
 
 import pytest
 
-from packages.adapters.sqlalchemy_impl.generation_task_repository import SQLAlchemyGenerationTaskRepository
 from packages.adapters.sqlalchemy_impl.tts_job_repository import SQLAlchemyTTSJobRepository
 from packages.adapters.sqlalchemy_impl.voice_clone_profile_repository import SQLAlchemyVoiceCloneProfileRepository
 from packages.domain.generation_task import GenerationTaskStatus
diff --git a/tests/unit/test_template_use_cases.py b/tests/unit/test_template_use_cases.py
index aff04d284..df6cab792 100644
--- a/tests/unit/test_template_use_cases.py
+++ b/tests/unit/test_template_use_cases.py
@@ -2,7 +2,7 @@
 Template Use Cases 单元测试 — 剪辑计划模板 CRUD + 业务规则校验
 """
 
-from unittest.mock import MagicMock, Mock
+from unittest.mock import Mock
 
 import pytest
 
diff --git a/tests/unit/test_tts_oss_transfer.py b/tests/unit/test_tts_oss_transfer.py
index 0fa0ed7ac..67271ad44 100644
--- a/tests/unit/test_tts_oss_transfer.py
+++ b/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
 
-import pytest
 
 from packages.application.cosyvoice_service import CosyVoiceService
 from packages.application.tts_job.workflow import TTSWorkflowService
diff --git a/tests/unit/test_tts_save_to_library.py b/tests/unit/test_tts_save_to_library.py
index fc62b0e5c..b40711839 100644
--- a/tests/unit/test_tts_save_to_library.py
+++ b/tests/unit/test_tts_save_to_library.py
@@ -12,7 +12,7 @@
 from __future__ import annotations
 
 from datetime import datetime, timezone
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 
 import pytest
 
@@ -287,7 +287,6 @@ class TestSaveToLibraryUseCase:
         repo = MagicMock()
         repo.count_by_user.return_value = 0  # 配额未满
 
-        expected_item = _make_voice_library_item()
         repo.create.side_effect = lambda item: item
 
         use_case = CreateVoiceLibraryUseCase(repo)
diff --git a/tests/unit/test_tts_segment_synthesis.py b/tests/unit/test_tts_segment_synthesis.py
index 3624f0ced..583b3a2ba 100644
--- a/tests/unit/test_tts_segment_synthesis.py
+++ b/tests/unit/test_tts_segment_synthesis.py
@@ -11,7 +11,7 @@ from __future__ import annotations
 import os
 import tempfile
 from datetime import datetime, timezone
-from unittest.mock import MagicMock, call, patch
+from unittest.mock import MagicMock, patch
 
 import pytest
 
diff --git a/tests/unit/test_tts_streaming.py b/tests/unit/test_tts_streaming.py
index 39a20ff36..8b2bd29ca 100644
--- a/tests/unit/test_tts_streaming.py
+++ b/tests/unit/test_tts_streaming.py
@@ -9,14 +9,12 @@
 
 from __future__ import annotations
 
-import asyncio
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
 
 from packages.application.cosyvoice_service import CosyVoiceError, CosyVoiceService
 from packages.application.tts_job.streaming_service import (
-    TTSStreamingError,
     TTSStreamingService,
 )
 
diff --git a/tests/unit/test_tts_synthesis_failure.py b/tests/unit/test_tts_synthesis_failure.py
index a21153558..84094e6e7 100644
--- a/tests/unit/test_tts_synthesis_failure.py
+++ b/tests/unit/test_tts_synthesis_failure.py
@@ -6,9 +6,8 @@
 
 from __future__ import annotations
 
-import logging
 from datetime import datetime, timezone
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 
 import pytest
 
diff --git a/tests/unit/test_unified_render_service.py b/tests/unit/test_unified_render_service.py
index cef802d5d..b3223fa13 100755
--- a/tests/unit/test_unified_render_service.py
+++ b/tests/unit/test_unified_render_service.py
@@ -12,7 +12,6 @@ from unittest.mock import MagicMock, patch
 
 import pytest
 from video_processing.unified_render_service import (
-    RenderLayer,
     RenderResult,
     ResolvedClip,
     UnifiedRenderService,
@@ -683,7 +682,7 @@ class TestAssSubtitles:
     def test_generate_ass_with_subtitle_only(self, tmp_path):
         """只有字幕时生成 ASS 文件。"""
         ass_path = tmp_path / "test.ass"
-        result = generate_ass_subtitles(
+        generate_ass_subtitles(
             ass_path,
             video_width=1280,
             video_height=720,
diff --git a/tests/unit/test_upload_routes.py b/tests/unit/test_upload_routes.py
index b3afc7d4f..f4d35469b 100644
--- a/tests/unit/test_upload_routes.py
+++ b/tests/unit/test_upload_routes.py
@@ -20,7 +20,6 @@ from unittest.mock import MagicMock
 os.environ.setdefault("JWT_SECRET_KEY", "unit-test-secret-key-for-testing")
 os.environ.setdefault("DATABASE_URL", "sqlite:///test.db")
 
-import pytest
 
 # 确保 app 模块可导入
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
diff --git a/tests/unit/test_uuid_field_length.py b/tests/unit/test_uuid_field_length.py
index 79e76d12b..2e8a1919d 100644
--- a/tests/unit/test_uuid_field_length.py
+++ b/tests/unit/test_uuid_field_length.py
@@ -13,7 +13,6 @@ import uuid
 import pytest
 
 from packages.adapters.sqlalchemy_impl.models import (
-    Base,
     ClassificationJobModel,
     EditPlanClipModel,
     EditPlanModel,
diff --git a/tests/unit/test_video_compose_service.py b/tests/unit/test_video_compose_service.py
index 501ffa665..f7202ae6c 100644
--- a/tests/unit/test_video_compose_service.py
+++ b/tests/unit/test_video_compose_service.py
@@ -14,15 +14,14 @@ sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "apps" / "api"))
 
 from app.services.video_compose_service import (
     ComposeCommand,
-    ComposeValidation,
     VideoComposeService,
     _build_concat_filter,
     _build_xfade_filter,
     _chain_filters,
 )
 
-from packages.domain.edit_plan import EditPlan, EditPlanStatus
-from packages.domain.edit_plan_clip import EditPlanClip, EditPlanClipStatus
+from packages.domain.edit_plan import EditPlanStatus
+from packages.domain.edit_plan_clip import EditPlanClipStatus
 
 # ── Stub 实体 ─────────────────────────────────────────────────────────────────
 
diff --git a/tests/unit/test_voice_clone_workflow.py b/tests/unit/test_voice_clone_workflow.py
index a20d0cfbd..cd9b67833 100644
--- a/tests/unit/test_voice_clone_workflow.py
+++ b/tests/unit/test_voice_clone_workflow.py
@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 
 import pytest
 
diff --git a/tests/unit/test_voice_library_use_cases.py b/tests/unit/test_voice_library_use_cases.py
index 3fa913525..87cf3a6a4 100644
--- a/tests/unit/test_voice_library_use_cases.py
+++ b/tests/unit/test_voice_library_use_cases.py
@@ -8,7 +8,7 @@
 4. 边界条件与异常场景
 """
 
-from unittest.mock import MagicMock, Mock, call
+from unittest.mock import Mock
 
 import pytest