修复所有bug并添加新功能

- 修复添加账号按钮无反应问题
- 添加账号备注字段（可选）
- 添加账号设置按钮（修改密码/备注）
- 修复用户反馈���能
- 添加定时任务执行日志
- 修复容器重启后账号加载问题
- 修复所有JavaScript语法错误
- 优化账号加载机制（4层保障）

🤖 Generated with Claude Code

db_pool.py

@@ -82,8 +82,8 @@ class ConnectionPool:
             print(f"归还连接失败(数据库错误): {e}")
             try:
                 conn.close()
-            except Exception:
-                pass
+            except Exception as close_error:
+                print(f"关闭损坏的连接失败: {close_error}")
             # 创建新连接补充
             with self._lock:
                 try:
@@ -96,14 +96,14 @@ class ConnectionPool:
             print(f"警告: 连接池已满，关闭多余连接")
             try:
                 conn.close()
-            except Exception:
-                pass
+            except Exception as close_error:
+                print(f"关闭多余连接失败: {close_error}")
         except Exception as e:
             print(f"归还连接失败(未知错误): {e}")
             try:
                 conn.close()
-            except Exception:
-                pass
+            except Exception as close_error:
+                print(f"关闭异常连接失败: {close_error}")
 
     def close_all(self):
         """关闭所有连接"""