QFrame+Qt.Popup and QDialog popups are unreliable on macOS inside
QDialog parents — they may appear behind the parent or not receive
clicks. Replace with a simple inline QLabel that toggles visibility
when the ? button is clicked. This is the most reliable approach
across all platforms.
- Add self._inline_help QLabel below the mapping input (hidden by default)
- _toggle_inline_help() simply shows/hides the label
- Styled with dark background, blue border, matching the app theme
- No external popup windows needed
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
