feat: add health check endpoint for monitoring

frontend/e2e/health-check.spec.ts

@@ -0,0 +1,33 @@
+/**
+ * E2E: Health check endpoint verification
+ *
+ * Tests that:
+ * 1. GET /api/health returns 200 with { status: "ok" }
+ * 2. The endpoint is publicly accessible (no auth required)
+ */
+
+import { test, expect } from "@playwright/test";
+
+test.describe("Health Check Endpoint", () => {
+  test("GET /api/health returns status ok", async ({ request }) => {
+    const response = await request.get("/api/health");
+
+    expect(response.status()).toBe(200);
+
+    const body = await response.json();
+    expect(body).toEqual({ status: "ok" });
+  });
+
+  test("health endpoint is accessible without authentication", async ({
+    request,
+  }) => {
+    // Make request without any auth headers/cookies
+    const response = await request.get("/api/health", {
+      headers: {},
+    });
+
+    expect(response.status()).toBe(200);
+    const body = await response.json();
+    expect(body.status).toBe("ok");
+  });
+});

frontend/src/app/api/health/route.ts

@@ -0,0 +1,5 @@
+import { NextResponse } from "next/server";
+
+export async function GET() {
+  return NextResponse.json({ status: "ok" });
+}

frontend/src/lib/auth/mode.ts

@@ -166,6 +166,7 @@ export const ROUTE_CONFIG = {
     "/register",
     "/verify-request", // For email magic link
     "/api/auth",
+    "/api/health",
     "/pending-approval",
     "/account-suspended",
   ],