feat(phase6): 测试补全 + 集成测试 + repository 落地示范

- tests/unit/modules/test_repository.py：base_repository 在 SQLite 内存库的 CRUD 测试
- tests/integration/api/test_smoke.py：登录链路 / 只读接口 / 未授权拦截（标记 integration，默认跳过）
- conftest 提供 sqlite_db（隔离 DB）与 app/client/admin_headers（集成）fixture
- pytest.ini 默认跳过 integration，Makefile test-integration 可显式运行
- 修复 base_repository.get_by_id/get_by_ids 对字符串 ID 的兼容（URL 路径参数）
- 示范 modules/system/level service 改用 level_repo，CRUD 全链路实测通过

Co-Authored-By: Claude <noreply@anthropic.com>

modules/system/level/service.py

@@ -53,6 +53,7 @@ from sqlalchemy import and_
 from shared.constants import PAGE_SIZE
 from modules.system.level.schemas import LevelForm, LevelStatusForm
 from modules.system.level.models import Level
+from modules.system.level.repository import level_repo
 from modules.upload import service as upload
 from config import FASTAPI_TEMP_PATH, FASTAPI_UPLOAD_DIR, FASTAPI_IMAGE_URL
 from core.database import get_db_session
@@ -66,13 +67,12 @@ from utils.request import like_contains
 # 查询职级分页数据
 
 def get_level_page(request):
-    db = get_db_session()
     # 页码
     page = int(request.query_params.get("pageNo", 1))
     # 每页数
     limit = int(request.query_params.get("pageSize", PAGE_SIZE))
     # 查询数据
-    query = db.query(Level).filter(Level.is_delete == 0)
+    query = level_repo.filter(Level.is_delete == 0)
     # 职级名称
     name = request.query_params.get('name')
     if name:
@@ -105,9 +105,8 @@ def get_level_page(request):
 # 根据ID查询职级详情
 
 def get_level_detail(level_id):
-    db = get_db_session()
     # 根据ID查询职级
-    level = db.query(Level).filter(and_(Level.id == level_id, Level.is_delete == 0)).first()
+    level = level_repo.get_by_id(level_id)
     # 查询结果为空判断
     if not level:
         return None
@@ -118,15 +117,11 @@ def get_level_detail(level_id):
 # 添加职级
 
 def add_level(request, data: LevelForm):
-    db = get_db_session()
     # 唯一性校验
-    if db.query(Level).filter(and_(Level.name == data.name, Level.is_delete == 0)).first():
+    if level_repo.filter(Level.name == data.name, Level.is_delete == 0).first():
         return R.failed("职级名称不能重复")
-    # 表单数据赋值给对象
-    level = Level(**data.model_dump(exclude={'id'}))
-    level.create_user = get_user_id(request)
-    # 插入数据
-    level.save()
+    # 表单数据赋值给对象并插入
+    level_repo.create(**data.model_dump(exclude={'id'}), create_user=get_user_id(request))
     # 返回结果
     return R.ok(msg="添加成功")
 
@@ -134,24 +129,21 @@ def add_level(request, data: LevelForm):
 # 更新职级
 
 def update_level(request, data: LevelForm):
-    db = get_db_session()
     # 记录ID判空
     if not data.id or data.id <= 0:
         return R.failed("记录ID不能为空")
     # 唯一性校验（排除自身）
-    if db.query(Level).filter(and_(Level.name == data.name, Level.id != data.id, Level.is_delete == 0)).first():
+    if level_repo.filter(Level.name == data.name, Level.id != data.id, Level.is_delete == 0).first():
         return R.failed("职级名称不能重复")
 
     # 根据ID查询记录
-    level = db.query(Level).filter(and_(Level.id == data.id, Level.is_delete == 0)).first()
-    # 查询结果判空
-    if not level:
+    if not level_repo.get_by_id(data.id):
         return R.failed("记录不存在")
     # 构造更新数据（排除 id）
     updData = data.model_dump(exclude={'id'})
     updData['update_user'] = get_user_id(request)
     updData['update_time'] = datetime.now(tz=timezone.utc)
-    result = db.query(Level).filter_by(id=data.id).update(updData)
+    result = level_repo.update(data.id, updData)
     # 提交数据
     if not result:
         return R.failed("更新失败")
@@ -164,15 +156,12 @@ def delete_level(level_id):
 # 设置状态
 
 def update_level_status(request, data: LevelStatusForm):
-    db = get_db_session()
     # 根据ID查询记录
-    level = db.query(Level).filter(and_(Level.id == data.id, Level.is_delete == 0)).first()
-    # 查询结果判空
-    if not level:
+    if not level_repo.get_by_id(data.id):
         return R.failed("记录不存在")
 
     # 更新记录
-    result = db.query(Level).filter_by(id=data.id).update({
+    result = level_repo.update(data.id, {
         "status": data.status,
         "update_user": get_user_id(request),
         "update_time": datetime.now(tz=timezone.utc)