✨ feat(ai-chat): 全面升级AI聊天面板并优化交互体验

- 消息管理：新增聊天气泡的重试、编辑与单条删除功能及相对应的持久化状态函数
- 快捷操作：支持长文一键滑动到底端，并在代码块内增加SQL一键送入编辑器的快捷执行机制
- 视觉优化：深化AI回复背景沉浸感，重绘AI洞察按钮并移除设置面板所有的冗余紫色调
- 设置调优：放宽模型初始必填限制，新增内置系统提示词（Builtin Prompt）全览面板

frontend/package.json

@@ -16,11 +16,15 @@
     "@dnd-kit/sortable": "^10.0.0",
     "@dnd-kit/utilities": "^3.2.2",
     "@monaco-editor/react": "^4.6.0",
+    "@types/react-syntax-highlighter": "^15.5.13",
     "antd": "^5.12.0",
     "clsx": "^2.1.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
+    "react-markdown": "^10.1.0",
     "react-resizable": "^3.1.3",
+    "react-syntax-highlighter": "^16.1.1",
+    "remark-gfm": "^4.0.1",
     "sql-formatter": "^15.7.0",
     "uuid": "^9.0.1",
     "zustand": "^4.4.7"