feat: scaffold Tauri v2 + React + TypeScript + shadcn/ui project

Set up Vite + React 19 + TypeScript, Tauri v2, Tailwind v4,
shadcn/ui (dark theme), and all core frontend dependencies
(Zustand, TanStack Query/Table/Virtual, CodeMirror, lucide-react).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main.tsx

@@ -0,0 +1,27 @@
+import React from "react";
+import ReactDOM from "react-dom/client";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
+import { TooltipProvider } from "@/components/ui/tooltip";
+import { Toaster } from "@/components/ui/sonner";
+import App from "./App";
+import "./styles/globals.css";
+
+const queryClient = new QueryClient({
+  defaultOptions: {
+    queries: {
+      retry: 1,
+      refetchOnWindowFocus: false,
+    },
+  },
+});
+
+ReactDOM.createRoot(document.getElementById("root")!).render(
+  <React.StrictMode>
+    <QueryClientProvider client={queryClient}>
+      <TooltipProvider>
+        <App />
+        <Toaster />
+      </TooltipProvider>
+    </QueryClientProvider>
+  </React.StrictMode>
+);