对话历史摘要功能上线

对 Telegram Bot 的功能进行了优化，旨在提升用户体验，使操作更便捷。

新增对话历史摘要功能:
- 修改 /history 命令，提供智能对话历史摘要 📚。
- 使用当前选择的 AI 模型生成简洁而信息丰富的摘要，快速回顾关键信息。
性能优化:
- 通过提供摘要而非完整历史，有效降低数据传输量 🚀。
- 巧妙避开 Telegram 消息长度限制，确保稳定性。
多语言支持:
- 对话历史摘要功能已支持多语言 🌍。
- 所有支持的语言均已更新相关翻译。
Vercel 部署页面更新:
- 新增 index.html 文件，Vercel 部署后显示成功页面 🎨。
- 页面包含部署成功确认、下一步指南。
Bug 修复:
- 修复了一些已知 bug 🐞，提升了 Bot 的稳定性。

Conversation History Summary Feature Launch

Optimized the Telegram Bot's functionality to enhance the user experience and make operations more convenient.

New Conversation History Summary Feature:
- Introduced the new /history command, providing intelligent conversation history summaries 📚.
- Generates concise and informative summaries using the currently selected AI model, allowing quick review of key information.
Performance Optimization:
- Effectively reduced data transfer volume by providing summaries instead of full histories 🚀.
- Cleverly bypasses Telegram message length limitations, ensuring stability.
Multi-language Support:
- The conversation history summary feature now supports multiple languages 🌍.
- Updated relevant translations for all supported languages.
Vercel Deployment Page Update:
- Added an index.html file, displaying a success page upon Vercel deployment 🎨.
- The page includes deployment success confirmation, next steps guide.
Bug Fixes:
- Fixed several known bugs 🐞, improving Bot stability.