feat(ui): 实现 LSP UI 集成

- 添加 LSP 相关类型定义 (LSPServer, FileDiagnostic, DiagnosticsResponse)
- 添加 LSP API 函数 (listLSPServers, installLSPServer, startLSPServer 等)
- 创建 LSPPanel 组件: 语言服务器管理面板
- 创建 DiagnosticsPanel 组件: 诊断详情面板 (含搜索过滤)
- 创建 DiagnosticsIndicator 组件: 状态栏指示器
- 集成到 Web 模块 (App.tsx, Chat.tsx)

packages/web/src/pages/Chat.tsx

@@ -14,6 +14,7 @@ import {
   PermissionDialog,
   ContextUsage,
   SubagentProgress,
+  DiagnosticsIndicator,
 } from '@ai-assistant/ui';
 
 interface ChatPageProps {
@@ -30,6 +31,8 @@ interface ChatPageProps {
   onOpenAgents?: () => void;
   onOpenCheckpoints?: () => void;
   onOpenProviders?: () => void;
+  onOpenLSP?: () => void;
+  onOpenDiagnostics?: () => void;
   // Working Directory
   workingDirectory?: string;
 }
@@ -47,6 +50,8 @@ export function ChatPage({
   onOpenAgents,
   onOpenCheckpoints,
   onOpenProviders,
+  onOpenLSP,
+  onOpenDiagnostics,
   workingDirectory,
 }: ChatPageProps) {
   const {
@@ -184,8 +189,17 @@ export function ChatPage({
           <ConnectionStatus />
 
           {/* 工具栏按钮 */}
-          {(onToggleFileBrowser || onOpenCommands || onOpenMCP || onOpenHooks || onOpenAgents || onOpenCheckpoints || onOpenProviders) && (
+          {(onToggleFileBrowser || onOpenCommands || onOpenMCP || onOpenHooks || onOpenAgents || onOpenCheckpoints || onOpenProviders || onOpenLSP || onOpenDiagnostics) && (
             <div className="flex items-center gap-1.5 border-l border-line-muted pl-3">
+              {/* LSP 诊断指示器 */}
+              {(onOpenLSP || onOpenDiagnostics) && (
+                <DiagnosticsIndicator
+                  onClickDiagnostics={onOpenDiagnostics}
+                  onClickLSP={onOpenLSP}
+                  refreshInterval={30000}
+                />
+              )}
+
               {/* Checkpoints 按钮 */}
               {onOpenCheckpoints && (
                 <motion.button