initial commit

src/routes/demo/tanstack-query.tsx

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+import { createFileRoute } from '@tanstack/react-router'
+import { useQuery } from '@tanstack/react-query'
+
+export const Route = createFileRoute('/demo/tanstack-query')({
+  component: TanStackQueryDemo,
+})
+
+function TanStackQueryDemo() {
+  const { data } = useQuery({
+    queryKey: ['todos'],
+    queryFn: () =>
+      Promise.resolve([
+        { id: 1, name: 'Alice' },
+        { id: 2, name: 'Bob' },
+        { id: 3, name: 'Charlie' },
+      ]),
+    initialData: [],
+  })
+
+  return (
+    <div
+      className="flex items-center justify-center min-h-screen bg-gradient-to-br from-purple-100 to-blue-100 p-4 text-white"
+      style={{
+        backgroundImage:
+          'radial-gradient(50% 50% at 95% 5%, #f4a460 0%, #8b4513 70%, #1a0f0a 100%)',
+      }}
+    >
+      <div className="w-full max-w-2xl p-8 rounded-xl backdrop-blur-md bg-black/50 shadow-xl border-8 border-black/10">
+        <h1 className="text-2xl mb-4">
+          TanStack Query Simple Promise Handling
+        </h1>
+        <ul className="mb-4 space-y-2">
+          {data.map((todo) => (
+            <li
+              key={todo.id}
+              className="bg-white/10 border border-white/20 rounded-lg p-3 backdrop-blur-sm shadow-md"
+            >
+              <span className="text-lg text-white">{todo.name}</span>
+            </li>
+          ))}
+        </ul>
+      </div>
+    </div>
+  )
+}