Improve navigation and URL validation in Playwright authentication tests

- Replaced `waitForTimeout` with `Promise.all` for navigation events to improve reliability.
- Updated URL assertions to support regex patterns for handling query parameters.
- Adjusted worker count in `playwright.config.ts` for improved performance in local environments.

frontend/playwright.config.ts

@@ -18,7 +18,7 @@ export default defineConfig({
   /* Retry on CI and locally to handle flaky tests */
   retries: process.env.CI ? 2 : 1,
   /* Limit workers to prevent test interference */
-  workers: process.env.CI ? 1 : 4,
+  workers: process.env.CI ? 1 : 12,
   /* Reporter to use. See https://playwright.dev/docs/test-reporters */
   reporter: 'html',
   /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */