fix: auto-fix code issues (cron)

- 修复重复导入/字段
- 修复异常处理
- 修复PEP8格式问题
- 添加类型注解

backend/collaboration_manager.py

@@ -352,7 +352,7 @@ class CollaborationManager:
                     is_active=bool(row[10]),
                     allow_download=bool(row[11]),
                     allow_export=bool(row[12]),
-                )
+                ),
             )
         return shares
 
@@ -435,7 +435,7 @@ class CollaborationManager:
         self.db.conn.commit()
 
     def get_comments(
-        self, target_type: str, target_id: str, include_resolved: bool = True
+        self, target_type: str, target_id: str, include_resolved: bool = True,
     ) -> list[Comment]:
         """获取评论列表"""
         if not self.db:
@@ -554,7 +554,7 @@ class CollaborationManager:
         return cursor.rowcount > 0
 
     def get_project_comments(
-        self, project_id: str, limit: int = 50, offset: int = 0
+        self, project_id: str, limit: int = 50, offset: int = 0,
     ) -> list[Comment]:
         """获取项目下的所有评论"""
         if not self.db: