feat: Add a simple hello world API endpoint at /api/hello that returns { messa

src/app/api/hello/route.ts

@@ -0,0 +1,13 @@
+// FILE: src/app/api/hello/route.ts
+import { NextRequest, NextResponse } from 'next/server';
+
+/**
+ * GET /api/hello
+ * Returns a hello world message with the current timestamp
+ */
+export async function GET(_req: NextRequest) {
+  return NextResponse.json({
+    message: 'Hello World',
+    timestamp: Date.now(),
+  });
+}

src/tests/api/hello.test.ts

@@ -0,0 +1,26 @@
+// FILE: src/tests/api/hello.test.ts
+import { describe, it, expect } from 'vitest';
+import { GET } from '@/app/api/hello/route';
+import { NextRequest } from 'next/server';
+
+function createMockNextRequest(method: string = 'GET', url: string = 'http://localhost/api/hello') {
+  // Partial implementation sufficient for GET handler
+  return new NextRequest(url, { method });
+}
+
+describe('GET /api/hello', () => {
+  it('should return Hello World message and timestamp', async () => {
+    const req = createMockNextRequest();
+    const res = await GET(req);
+    expect(res.status).toBe(200);
+    const json = await res.json();
+    expect(json).toEqual(
+      expect.objectContaining({
+        message: 'Hello World',
+        timestamp: expect.any(Number),
+      })
+    );
+    // Additional check: timestamp is within the last 5 seconds (to guard against stale/fake responses)
+    expect(Math.abs(json.timestamp - Date.now())).toBeLessThan(5000);
+  });
+});