Fix webkit frontend tests silently passing when they fail (#7408)

* Improve update-plugins workflow resilience and add summary

Continue processing remaining plugins when one fails instead of
crashing. Add summary at the end showing succeeded/failed/skipped
counts and plugin names.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Fix webkit frontend tests silently passing when they fail

Remove `|| true` from the webkit Playwright test step that was
swallowing non-zero exit codes, causing the workflow to always
report success regardless of test results.

Fixes #7405

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/frontend-tests.yml

@@ -192,7 +192,7 @@ jobs:
           done
           cd src
           gnpm exec playwright install webkit --with-deps
-          gnpm run test-ui --project=webkit || true
+          gnpm run test-ui --project=webkit
       - uses: actions/upload-artifact@v7
         if: always()
         with: