refactor: 移除多余依赖，统一 MUI 为唯一 UI 库

- 移除 radix-ui、clsx、tailwind-merge、class-variance-authority、react-router-dom

- 前后端全面适配 MUI 组件，清理残留 Tailwind 工具类引用

- 优化 Agent Loop 引擎、IPC 处理器、Provider Adapter 等后端模块

- 新增 Agent 网络工具通用设计文档 v2

src/components/chat/MessageList.tsx

@@ -11,10 +11,9 @@ import { StreamingIndicator } from './StreamingIndicator';
 export function MessageList(): React.JSX.Element {
   const messages = useAgentStore((s) => s.messages);
   const isStreaming = useAgentStore((s) => s.isStreaming);
-  const streamingContent = useAgentStore((s) => s.streamingContent);
   const messagesEndRef = useRef<HTMLDivElement>(null);
 
-  useEffect(() => { messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' }); }, [messages, streamingContent]);
+  useEffect(() => { messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' }); }, [messages]);
 
   if (messages.length === 0 && !isStreaming) {
     return (
@@ -33,7 +32,7 @@ export function MessageList(): React.JSX.Element {
     <Box sx={{ flex: 1, overflowY: 'auto', px: 2, py: 3 }}>
       <Box sx={{ maxWidth: 768, mx: 'auto', display: 'flex', flexDirection: 'column', gap: 3 }}>
         {messages.map((msg, i) => (
-          <MessageItem key={msg.id} message={msg} isLast={i === messages.length - 1} isStreaming={isStreaming} streamContent={streamingContent} />
+          <MessageItem key={msg.id} message={msg} isLast={i === messages.length - 1} isStreaming={isStreaming} />
         ))}
         <StreamingIndicator />
         <div ref={messagesEndRef} />