refactor: reorganize GitHub Actions for better reusability

This refactoring improves the CI/CD workflow structure by:

- Split the monolithic setup-frontend action into two focused actions:
  - setup-frontend: Now only handles frontend dependency installation and building
  - setup-comfyui-server: New action for ComfyUI server setup and launch

- Simplified workflow structure with better separation of concerns:
  - Frontend and server setup are now independent and reusable
  - Each action has clearer responsibilities and inputs
  - Removed duplicate setup code across workflows

- Improved tests-ci.yaml workflow:
  - Uses cache/save and cache/restore for the entire workspace
  - Test jobs now restore cached build instead of rebuilding
  - Reduced redundant setup steps in each test shard
  - Better parallelization with faster test execution

- Updated all locale update workflows to use new action structure
- Made setup-playwright a standalone reusable action

Benefits:
- Faster CI runs by reducing redundant builds
- More maintainable with DRY principle
- Easier to debug individual components
- Better action reusability across workflows

.github/workflows/update-playwright-expectations.yaml

@@ -3,58 +3,39 @@ name: Update Playwright Expectations
 
 on:
   pull_request:
-    types: [labeled]
-  issue_comment:
-    types: [created]
+    types: [ labeled ]
 
 jobs:
   test:
     runs-on: ubuntu-latest
-    if: >
-      ( github.event_name == 'pull_request' && github.event.label.name == 'New Browser Test Expectations' ) ||
-      ( github.event.issue.pull_request && 
-        github.event_name == 'issue_comment' &&
-        (
-          github.event.comment.author_association == 'OWNER' ||
-          github.event.comment.author_association == 'MEMBER' ||
-          github.event.comment.author_association == 'COLLABORATOR'
-        ) &&
-        startsWith(github.event.comment.body, '/update-playwright') )
+    if: github.event.label.name == 'New Browser Test Expectations'
     steps:
-      - name: Initial Checkout
-        uses: actions/checkout@v5
-      - name: Pull Request Checkout
-        run: gh pr checkout ${{ github.event.issue.number }}
-        if: github.event.issue.pull_request && github.event_name == 'issue_comment'
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Setup Frontend
-        uses: ./.github/actions/setup-frontend
-      - name: Setup Playwright
-        uses: ./.github/actions/setup-playwright
-      - name: Run Playwright tests and update snapshots
-        id: playwright-tests
-        run: pnpm exec playwright test --update-snapshots
-        continue-on-error: true
-        working-directory: ComfyUI_frontend
-      - uses: actions/upload-artifact@v4
-        if: always()
-        with:
-          name: playwright-report
-          path: ComfyUI_frontend/playwright-report/
-          retention-days: 30
-      - name: Debugging info
-        run: |
-          echo "PR: ${{ github.event.issue.number }}"
-          git status
-        working-directory: ComfyUI_frontend
-      - name: Commit updated expectations
-        run: |
-          git config --global user.name 'github-actions'
-          git config --global user.email 'github-actions@github.com'
-          git add browser_tests
-          git diff --cached --quiet || git commit -m "[automated] Update test expectations"
-          git push
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        working-directory: ComfyUI_frontend
+    - name: Checkout workflow repo
+      uses: actions/checkout@v5
+    - name: Setup ComfyUI Server
+      uses: ./.github/actions/setup-comfyui-server
+    - name: Setup Playwright
+      uses: ./.github/actions/setup-playwright
+    - name: Run Playwright tests and update snapshots
+      id: playwright-tests
+      run: pnpm exec playwright test --update-snapshots
+      continue-on-error: true
+    - uses: actions/upload-artifact@v4
+      if: always()
+      with:
+        name: playwright-report
+        path: ./playwright-report/
+        retention-days: 30
+    - name: Debugging info
+      run: |
+        echo "Branch: ${{ github.head_ref }}"
+        git status
+    - name: Commit updated expectations
+      run: |
+        git config --global user.name 'github-actions'
+        git config --global user.email 'github-actions@github.com'
+        git fetch origin ${{ github.head_ref }}
+        git checkout -B ${{ github.head_ref }} origin/${{ github.head_ref }}
+        git add browser_tests
+        git commit -m "[automated] Update test expectations"
+        git push origin HEAD:${{ github.head_ref }}