fix: CI test failures - build for local testing

Fixed the root cause of CI test failures:
- Test workflow now builds with GITHUB_ACTIONS=false for local baseUrl
- Removed CI-specific baseURL from Playwright config
- docusaurus serve always serves at root, regardless of build baseUrl
- Tests now work correctly in both local and CI environments

All 69 tests now pass (100%) in CI simulation.

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

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Author: hadrien-toma

.github/workflows/test.yml

@@ -31,6 +31,8 @@ jobs:
         run: npx playwright install --with-deps
 
       - name: Build Docusaurus
+        env:
+          GITHUB_ACTIONS: false
         run: npm run build
 
       - name: Run Playwright tests

playwright.config.ts

@@ -29,7 +29,7 @@ export default defineConfig({
   /* Shared settings for all the projects below */
   use: {
     /* Base URL to use in actions like `await page.goto('/')` */
-    baseURL: process.env.CI ? 'http://localhost:3000/docusaurus' : 'http://localhost:3000',
+    baseURL: 'http://localhost:3000',
 
     /* Collect trace when retrying the failed test */
     trace: 'on-first-retry',