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/ChatInput.tsx

@@ -251,7 +251,7 @@ export function ChatInput(): React.JSX.Element {
           style={{ width: '100%', background: 'transparent', border: 'none', outline: 'none', color: 'inherit', fontSize: 14, lineHeight: '28px', resize: 'none', fontFamily: 'inherit', minHeight: 42, maxHeight: 160 }}
         />
 
-        <Stack direction="row" justifyContent="space-between" alignItems="center" sx={{ mt: 1, minHeight: 32 }}>
+        <Stack direction="row" sx={{ mt: 1, minHeight: 32, justifyContent: 'space-between', alignItems: 'center' }}>
           {/* 左侧：附件按钮 */}
           <Tooltip title={supportsImages ? '附加文件（图片/文本/代码）' : '附加文件（文本/代码）— DeepSeek 不支持图片'}>
             <IconButton size="small" sx={{ color: 'text.secondary' }} onClick={handleFileSelect}>
@@ -260,7 +260,7 @@ export function ChatInput(): React.JSX.Element {
           </Tooltip>
 
           {/* 右侧：发送按钮 */}
-          <Stack direction="row" spacing={1} alignItems="center">
+          <Stack direction="row" spacing={1} sx={{ alignItems: 'center' }}>
             {isStreaming ? (
               <Button variant="contained" color="error" size="small" onClick={handleAbort} sx={{ height: 28, fontSize: 12 }}>
                 <Square size={12} style={{ marginRight: 6 }} /> 中断