Summary

• Pass the translated Success Message label to the success notification CodeHinter so the expanded editor header shows the field name instead of Editor.
• Reuse the same label for the inline field text and popup header.

Fixes #6655

Testing

• npx --yes esbuild@0.25.9 frontend/src/AppBuilder/QueryManager/Components/SuccessNotificationInputs.jsx --loader:.jsx=jsx --format=esm --outfile=NUL --log-level=error
• git diff --check

Not run: full frontend lint/test suite, because dependencies are not installed in this sparse checkout.