Update sync.yml

[tytestelle]

name: Sync Fork with Upstream (Keep Workflow)

on:
schedule:
- cron: '0 */4 * * *' # 每 4 小时一次
workflow_dispatch:

jobs:
sync:
runs-on: ubuntu-latest
steps:
- name: Checkout current repository
uses: actions/checkout@v4
with:
fetch-depth: 0 # 保留完整提交历史

  - name: Set up Git
    run: |
      git config user.name "github-actions[bot]"
      git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

  - name: Backup workflows directory
    run: |
      mkdir -p /tmp/workflows
      cp -r .github/workflows/* /tmp/workflows/ || true

  - name: Add upstream and fetch
    run: |
      git remote add upstream https://github.com/Luckykeeper/MoonTV.git
      git fetch upstream

  - name: Merge upstream changes into main
    run: |
      git checkout main
      git merge upstream/main --no-edit || true

  - name: Restore workflows directory
    run: |
      mkdir -p .github/workflows
      cp -r /tmp/workflows/* .github/workflows/ || true
      git add .github/workflows || true
      git commit -m "Restore workflows after sync" || true

  - name: Push changes to origin
    run: git push origin main