Fix E2E test timeout: align Playwright port with Vite preview

Problem:
- CI E2E tests timing out after 120s waiting for web server
- Playwright config expected port 4173 (Vite default)
- vite.config.ts configured preview server on port 3000
- Playwright waited for wrong port, never found server

Solution:
- Changed playwright.config.ts baseURL from localhost:4173 to localhost:3000
- Now matches vite.config.ts preview.port setting

Result:
- E2E tests can now start successfully
- Preview server found immediately on correct port
- No more 120s timeout failures in CI

Author: macintorsten

playwright.config.ts

@@ -1,7 +1,7 @@
 import { defineConfig, devices } from '@playwright/test';
 
 const isCI = !!process.env.CI;
-const baseURL = process.env.PLAYWRIGHT_BASE_URL || 'http://localhost:4173';
+const baseURL = process.env.PLAYWRIGHT_BASE_URL || 'http://localhost:3000';
 
 export default defineConfig({
   testDir: './e2e',