- Use `plainText` property instead of `text` on `supportPreviewDisclosure` in `configDiagnostics.qml`.
- `DisclosureButton` inherits from `PlainButton.qml`, which expects `plainText` to safely bind and format the button text and accessible name. Direct assignment to `text` broke the text binding and resulted in an empty label.
- Update `CHANGELOG.md` under `Unreleased` -> `Fixed`.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
Co-authored-by: Lucenx9 <185146821+Lucenx9@users.noreply.github.com>