GitLab

- User balance low notification: email alert when balance drops below
  configurable threshold (user email + verified extra emails)
- Account quota notification: broadcast email to admin-configured
  recipients when daily/weekly/total quota usage exceeds alert threshold
- Admin settings: global enable/disable, default threshold, quota
  notification email list (Email Settings tab)
- User profile: enable/disable, custom threshold, add/remove extra
  notification emails with verification code flow
- Account quota: per-dimension alert toggle and threshold in quota
  control card
- Trigger logic: first-crossing only (old >= threshold && new < threshold
  for balance; old < threshold && new >= threshold for quota), naturally
  prevents duplicate notifications without Redis dedup

Migrate the hardcoded wechat field to the new extensible user
attributes system and improve the users management UI.

Migration:
- Add migration 019 to move wechat data to user_attribute_values
- Remove wechat field from User entity, DTOs, and API contracts
- Clean up wechat-related code from backend and frontend

UsersView enhancements:
- Add text labels to action buttons (Filter Settings, Column Settings,
  Attributes Config) for better UX
- Change status column to show colored dot + Chinese text instead of
  English text
- Add dynamic attribute columns support with batch loading
- Add column visibility settings with localStorage persistence
- Add filter settings modal for search and filter preferences
- Update i18n translations

🤖 Generated with [Claude Code](https://claude.com/claude-code

)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

- 移除所有语句末尾分号
- 统一对象属性尾随逗号格式
- 优化类型定义导入顺序
- 提升代码一致性和可读性

- 新增User模型字段：username（用户名）、wechat（微信号）、notes（备注）
- 扩展用户搜索功能，支持通过用户名和微信号搜索
- 添加用户个人资料更新功能，用户可自行编辑用户名和微信号
- 管理员用户列表新增用户名、微信号、备注显示列
- 备注字段仅对管理员可见，增强数据安全性
- 完善中英文国际化翻译
- 修复国际化文件中重复属性的TypeScript错误

🤖 Generated with [Claude Code](https://claude.com/claude-code

)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>