fix: adjust Playwright configuration for headless mode to resolve dependency issues

backend/playwright.config.mjs

@@ -15,24 +15,28 @@ export default defineConfig({
     actionTimeout: 0,
     baseURL: 'http://localhost:3000',
     trace: 'on-first-retry',
+    headless: true,
   },
   projects: [
     {
       name: 'chromium',
       use: {
         ...devices['Desktop Chrome'],
+        headless: true,
       },
     },
     {
       name: 'firefox',
       use: {
         ...devices['Desktop Firefox'],
+        headless: true,
       },
     },
     {
       name: 'webkit',
       use: {
         ...devices['Desktop Safari'],
+        headless: true,
       },
     },
   ],