fix(ci): drop Node.js install step — already on runner

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

.gitea/workflows/publish.yml

@@ -10,13 +10,6 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install Node.js
-        run: |
-          NODE_VERSION=22.17.0
-          curl -fsSL "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-x64.tar.xz" | tar -xJ --strip-components=1 -C /usr/local
-          node --version
-          npm --version
-
       - name: Build frontend
         run: |
           cd crates/ericrfb-frontend