ci: deploy 用 cp 替代 rsync；同步 contrib 模板；更新产品说明

.github/workflows/reusable-release-frontend.yaml

@@ -59,14 +59,15 @@ jobs:
       - name: Build
         run: ${{ inputs.build_command }}
 
-      - name: Deploy (rsync dist to web root)
+      - name: Deploy (sync dist to web root)
         run: |
           set -euo pipefail
           test -d dist
           DEST="${{ inputs.deploy_path }}"
           DEST="${DEST%/}"
           mkdir -p "$DEST"
-          rsync -a --delete dist/ "$DEST/"
+          find "$DEST" -mindepth 1 -maxdepth 1 -exec rm -rf {} +
+          cp -a dist/. "$DEST/"
 
       - name: Set ownership for Nginx (Baota www)
         if: ${{ inputs.chown_www }}