ci(#54): add frontend PR quality gates

.github/workflows/auto-merge.yml

@@ -1,30 +1,29 @@
 name: Dependabot Auto Merge
+
 on:
   pull_request_target:
-    types: [labeled, edited]
+    types: [opened, reopened, synchronize, ready_for_review, labeled]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+concurrency:
+  group: dependabot-auto-merge-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
 
 jobs:
   merge:
-    if: contains(github.event.pull_request.labels.*.name, 'dependencies')
+    if: >
+      github.actor == 'dependabot[bot]' &&
+      github.event.pull_request.user.login == 'dependabot[bot]' &&
+      contains(github.event.pull_request.labels.*.name, 'dependencies')
     name: Dependabot Auto Merge
     runs-on: ubuntu-latest
+    timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v4
-
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4
-
-      - name: Setup Node.js environment
-        uses: actions/setup-node@v4
-        with:
-          node-version: '20'
-
-      - name: Install deps
-        run: pnpm install
-
-      - name: Merge
-        uses: ahmadnassri/action-dependabot-auto-merge@v2
-        with:
-          command: merge
-          target: minor
-          github-token: ${{ secrets.GH_TOKEN }}
+      - name: Enable auto-merge
+        env:
+          GH_TOKEN: ${{ github.token }}
+          PR_URL: ${{ github.event.pull_request.html_url }}
+        run: gh pr merge "$PR_URL" --auto --merge