kdlb9zs9n: Scaffold Next.js app and create the server session from a Minnect login

src/app/page.tsx

@@ -0,0 +1,12 @@
+// Placeholder home page. The sign-in screen and the feed UI are built in
+// later tasks (tlv84yb7n and the feed tasks). This task delivers the server
+// session routes under /api/session.
+
+export default function HomePage() {
+  return (
+    <main style={{ maxWidth: 640, margin: "0 auto", padding: "2rem 1rem" }}>
+      <h1>Minnect feed browser</h1>
+      <p>The sign-in screen is built in a later task.</p>
+    </main>
+  );
+}