更新 .env.example，提供更清晰的 API 配置说明与本地开发环境配置指引。
修改 next.config.ts：支持动态解析允许的开发环境来源（origins），提升配置灵活性。
重构 admin-language-switcher：优化语言切换同步机制，确保语言变更能够及时生效。
优化英文、尼泊尔语与中文语言包中的错误提示文案，进一步明确 API 配置要求。
精简 admin-http.ts：将 API Base URL 校验逻辑抽离至独立模块并统一导出，提升代码可维护性。
修改 .env.example，补充环境切换说明并新增生产环境 API 地址配置。
更新 next.config.ts：使用 API_BASE_URL 进行 API 重写配置，确保 API 路由一致性。
重构 login-form.tsx：移除 API 配置检查逻辑，简化登录流程。
调整 admin-http.ts：通过 Next.js 代理转发 API 请求，提升后端通信稳定性。
- Introduced new API functions for managing admin report jobs, including download and post operations.
- Updated English, Nepali, and Chinese locale files to include new messages related to report job actions and rollback confirmations.
- Enhanced user experience by providing clearer instructions and feedback in the admin interface.
- Refactored related components to integrate new functionalities and improve overall usability.
- Updated English, Nepali, and Chinese locale files to include a new message for "Failed to save configuration".
- Added a hint for mixed rebate rates within the same dimension to enhance user understanding.
- Improved internationalization support across multiple locales for better user experience in the admin interface.
- Updated the English, Nepali, and Chinese locale files to include a new translation for "Toggle batch switch for {{group}}".
- Enhanced internationalization support for the admin interface by adding relevant strings for improved user experience.
- Implemented API functions for creating, updating, and deleting draws.
- Enhanced the admin draws console with UI components for managing draws.
- Added internationalization support for new draw management actions and messages.
