fix: 全面审计修复 — P0 功能缺陷 + P1 代码质量

P0 功能修复:
- stats: Admin V2 仪表盘 API 路径修正 (/stats/dashboard → /admin/dashboard)
- mcp: 桌面端 MCP 插件增加 isTauriRuntime() 守卫，避免浏览器模式崩溃
- admin: 侧边栏高亮逻辑修复 (startsWith → 精确匹配+子路径)

P1 代码质量:
- 删除 workflowBuilderStore.ts 死代码 (456行，零引用)
- sqlite.rs 3 处 SQL 静默失败改为 tracing::warn! 日志
- mcp_tool_adapter 2 处 unwrap 改为安全回退
- orchestration_execute 添加 @reserved 标注
- TRUTH.md 测试数字校准 (734→803)，Store 数 26→25

desktop/src/main.tsx

@@ -5,6 +5,7 @@ import './index.css';
 import { ToastProvider } from './components/ui/Toast';
 import { GlobalErrorBoundary } from './components/ui/ErrorBoundary';
 import { initWebMCPTools } from './lib/webmcp-tools';
+import { isTauriRuntime } from './lib/tauri-gateway';
 import { setupPluginListeners } from 'tauri-plugin-mcp';
 
 // Global error handler for uncaught errors
@@ -30,11 +31,10 @@ const handleGlobalReset = () => {
 // Initialize WebMCP debugging tools (dev mode only, Chrome 146+)
 initWebMCPTools();
 
-// Initialize tauri-plugin-mcp event listeners (dev mode only)
-if (import.meta.env.DEV) {
-  setupPluginListeners().catch((err) => {
-    console.warn('[MCP] Failed to setup plugin listeners:', err);
-  });
+// Initialize tauri-plugin-mcp event listeners (dev mode + Tauri runtime only)
+// Only works inside Tauri webview — gracefully skips in browser dev mode
+if (import.meta.env.DEV && isTauriRuntime()) {
+  setupPluginListeners().catch(() => {});
 }
 
 ReactDOM.createRoot(document.getElementById('root')!).render(