[feat] Enhanced auto-retry configuration for flaky tests (#5089)

- Increased Playwright test retries from 2 to 3 in CI environment
- Added Vitest retry configuration (2 retries) for unit tests in CI
- Addresses issues #4658 and #4416 with consistently flaky tests

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <noreply@anthropic.com>

vitest.config.ts

@@ -17,6 +17,7 @@ export default defineConfig({
     globals: true,
     environment: 'happy-dom',
     setupFiles: ['./vitest.setup.ts'],
+    retry: process.env.CI ? 2 : 0,
     include: [
       'tests-ui/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}',
       'src/components/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'