Add Node.js 22 setup in CI for frontend jobs

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

.gitea/workflows/ci.yml

@@ -59,6 +59,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2
 
@@ -108,6 +113,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2