feat(ci): 纯前端PR自动跳过后端检查，节省CI时间

.gitea/workflows/ci-cd.yml

@@ -33,7 +33,43 @@ concurrency:
   group: ci-cd-${{ gitea.event_name }}-${{ gitea.ref }}
   cancel-in-progress: true
 jobs:
+  check-frontend-only:
+    name: Check if frontend-only change
+    runs-on: ci-l1
+    if: github.event_name == 'pull_request'
+    outputs:
+      skip_backend: ${{ steps.check.outputs.skip_backend }}
+    steps:
+    - name: Checkout code
+      shell: sh
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+      run: "set -eu\npython3 - <<'PY'\nimport io, os, tarfile, time, urllib.request, urllib.error\nurl = f\"{os.environ['GITHUB_API_URL']}/repos/{os.environ['GITHUB_REPOSITORY']}/archive/{os.environ['GITHUB_SHA']}.tar.gz\"\nrequest = urllib.request.Request(url, headers={\"Authorization\": f\"token {os.environ['GITHUB_TOKEN']}\"})\nlast_err = None\nfor attempt in range(5):\n    try:\n        with urllib.request.urlopen(request, timeout=120) as response:\n            archive = response.read()\n        break\n    except urllib.error.HTTPError as e:\n        last_err = e\n        if e.code >= 500 and attempt < 4:\n            wait = 2 ** attempt\n            print(f\"Checkout HTTP {e.code}, retrying in {wait}s (attempt {attempt+1}/5)...\")\n            time.sleep(wait)\n            continue\n        raise\n    except Exception as e:\n        last_err = e\n        if attempt < 4:\n            wait = 2 ** attempt\n            print(f\"Checkout error: {e}, retrying in {wait}s (attempt {attempt+1}/5)...\")\n            time.sleep(wait)\n            continue\n        raise\nelse:\n    raise last_err\nwith tarfile.open(fileobj=io.BytesIO(archive), mode='r:gz') as tar:\n    root_prefix = tar.getmembers()[0].name.split('/', 1)[0] + '/'\n    for member in tar.getmembers():\n        name = member.name\n        if name == root_prefix[:-1]:\n            continue\n        if name.startswith(root_prefix):\n            member.name = name[len(root_prefix):]\n        if member.name:\n            tar.extract(member, '.')\nPY\n"
+    - name: Check changed files
+      id: check
+      shell: bash
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+      run: |
+        set -eu
+        PR_NUMBER=$(echo "$GITHUB_REF" | sed 's|refs/pull/||; s|/.*||')
+        API_URL="${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/files?limit=300"
+        FILES=$(curl -s -H "Authorization: token ${GITHUB_TOKEN}" "$API_URL"           | python3 -c "import sys,json; [print(f['filename']) for f in json.load(sys.stdin)]")
+        FRONTEND_COUNT=$(echo "$FILES" | grep -c '^apps/web/' || true)
+        BACKEND_COUNT=$(echo "$FILES" | grep -cv '^apps/web/' || true)
+        TOTAL=$(echo "$FILES" | grep -cv '^$' || true)
+        echo "变更文件: ${TOTAL} 个 (前端: ${FRONTEND_COUNT}, 后端/公共: ${BACKEND_COUNT})"
+        if [ "$BACKEND_COUNT" = "0" ] && [ "$FRONTEND_COUNT" -gt "0" ]; then
+          echo "skip_backend=true" >> $GITHUB_OUTPUT
+          echo "✅ 纯前端改动，跳过后端检查"
+        else
+          echo "skip_backend=false" >> $GITHUB_OUTPUT
+          echo "🔧 包含后端/公共变更，运行完整CI"
+        fi
+
   validate:
+    needs: check-frontend-only
+    if: always() && needs.check-frontend-only.outputs.skip_backend != 'true'
     name: Validate Code Quality And Tests
     runs-on: ci-l1
     timeout-minutes: 10
@@ -190,6 +226,8 @@ jobs:
 
         '
   unit-tests:
+    needs: check-frontend-only
+    if: always() && needs.check-frontend-only.outputs.skip_backend != 'true'
     name: Unit Tests
     runs-on: ci-l2
     timeout-minutes: 8
@@ -264,8 +302,10 @@ jobs:
     name: Integration Tests
     runs-on: ci-l2
     timeout-minutes: 30
-    if: always()
-    needs: validate
+    if: always() && needs.check-frontend-only.outputs.skip_backend != 'true'
+    needs:
+      - check-frontend-only
+      - validate
     env:
       DATABASE_URL: postgresql+psycopg://postgres:postgres@127.0.0.1:5432/xiaoxia_saas
       USE_IN_MEMORY_DB: 'false'