add auth and nicer styling

src/app/api/login/route.ts

@@ -0,0 +1,26 @@
+import { NextRequest, NextResponse } from "next/server";
+import { getSession } from "@/lib/auth";
+
+export async function POST(req: NextRequest) {
+  try {
+    const { password } = await req.json();
+
+    if (password !== process.env.PASSWORD) {
+      return NextResponse.json(
+        { error: "Invalid password" },
+        { status: 401 }
+      );
+    }
+
+    const session = await getSession();
+    session.authenticated = true;
+    await session.save();
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    return NextResponse.json(
+      { error: "Authentication failed" },
+      { status: 500 }
+    );
+  }
+}