fix: 替换 setup-node/setup-go 为 shell 安装命令 (Gitea 无法访问 GitHub Actions)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -10,11 +10,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: 20
-          cache: "npm"
-          cache-dependency-path: frontend/package-lock.json
+        run: |
+          apt-get update -qq
+          apt-get install -y -qq nodejs npm 2>/dev/null || true
+          node --version
+          npm --version
 
       - name: Build frontend
         run: |
@@ -23,10 +23,16 @@ jobs:
           npm run build
 
       - name: Setup Go
-        uses: actions/setup-go@v5
-        with:
-          go-version: "1.22"
-          cache-dependency-path: backend/go.sum
+        run: |
+          if ! command -v go &>/dev/null; then
+            apt-get install -y -qq golang-go 2>/dev/null || {
+              wget -q https://go.dev/dl/go1.22.5.linux-amd64.tar.gz
+              tar -C /usr/local -xzf go1.22.5.linux-amd64.tar.gz
+              echo "/usr/local/go/bin" >> "$GITHUB_PATH"
+              export PATH="$PATH:/usr/local/go/bin"
+            }
+          fi
+          go version
 
       - name: Build all platforms
         run: |