Add JS test coverage to SonarQube job in CI workflow

- Add Node.js and Bun setup steps to the sonarqube job
- Install JS dependencies and run bun test:coverage before SonarQube scan

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -144,9 +144,23 @@ jobs:
           extensions: intl, pdo_pgsql, zip, gd, redis, imagick
           coverage: xdebug
 
-      - name: Install dependencies
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '22'
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v1
+
+      - name: Install PHP dependencies
         run: composer install --no-interaction --prefer-dist
 
+      - name: Install JS dependencies
+        run: bun install
+
+      - name: JS tests with coverage
+        run: bun run test:coverage
+
       - name: Create test database
         run: php bin/console doctrine:database:create --env=test --if-not-exists