fix: 修复 SSH 私钥处理导致的语法错误

- 使用 printf '%s\n' 替代 echo 处理 SSH 私钥
- 移除包含特殊字符变量的 echo 命令
- 简化 SSH 命令，避免引号嵌套问题

.woodpecker.yml

@@ -137,15 +137,13 @@ steps:
       - ls -la dist/
       - echo "Deploying to production"
       - mkdir -p ~/.ssh
-      - 'echo "SSH key length: $(echo $SSH_PRIVATE_KEY | wc -c)"'
-      - 'echo "First 50 chars of SSH key: $(echo $SSH_PRIVATE_KEY | cut -c1-50)"'
-      - echo "$SSH_PRIVATE_KEY" > ~/.ssh/id_rsa
+      - printf '%s\n' "$SSH_PRIVATE_KEY" > ~/.ssh/id_rsa
       - chmod 600 ~/.ssh/id_rsa
       - echo "SSH key file created, checking permissions:"
       - ls -la ~/.ssh/
-      - 'echo "Testing SSH connection..."'
-      - 'ssh -o StrictHostKeyChecking=no root@139.155.109.62 "echo Server connection OK"'
-      - 'ssh -o StrictHostKeyChecking=no root@139.155.109.62 "df -h / /home | head -3"'
+      - echo "Testing SSH connection..."
+      - ssh -o StrictHostKeyChecking=no root@139.155.109.62 "echo Server connection OK"
+      - ssh -o StrictHostKeyChecking=no root@139.155.109.62 "df -h / /home | head -3"
       - 'echo "Syncing build artifacts to production server"'
       - 'rsync -avz --delete -e "ssh -o StrictHostKeyChecking=no" dist/ root@139.155.109.62:/home/novalon/docker-app/novalon-website/dist/'
       - 'rsync -avz -e "ssh -o StrictHostKeyChecking=no" public/ root@139.155.109.62:/home/novalon/docker-app/novalon-website/public/'