Diagnose remaining Caterium v17.7.1 E2E failures

.github/workflows/diag-e2e-v1771.yml

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+name: Diagnose Caterium v17.7.1 E2E
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - '.github/workflows/diag-e2e-v1771.yml'
+permissions:
+  contents: write
+jobs:
+  diagnose:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+      - run: npm install
+      - run: npx playwright install --with-deps chromium
+      - name: Capture E2E output
+        run: npm run test:e2e > ops/e2e-v1771.log 2>&1 || true
+      - name: Save diagnostic log
+        run: |
+          rm -f .github/workflows/diag-e2e-v1771.yml ops/qa-trigger-v1771-final.txt
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add -A
+          git commit -m "Capture v17.7.1 E2E diagnostics"
+          git push