test: fix data-testid attribute names and update E2E test URLs to port 8917

frontend/playwright.config.ts

@@ -10,16 +10,16 @@ export default defineConfig({
   timeout: 30000,
   expect: { timeout: 5000 },
   use: {
-    baseURL: 'http://localhost',
+    baseURL: 'http://localhost:8917',
     trace: 'on-first-retry',
     screenshot: 'only-on-failure',
   },
 
   webServer: {
-    command: 'npm run dev',
-    url: 'http://localhost:3000',
+    command: 'NEXT_PUBLIC_API_URL=http://localhost:8916 npm run dev -- --port 8917',
+    url: 'http://localhost:8917',
     reuseExistingServer: true,
-    timeout: 60000,
+    timeout: 120000,
   },
 
   projects: [