HelpSearchWidget Class

Detailed Description

Owns a QLineEdit for the user's query and a popover QListWidget for ranked results. Queries are debounced by kDebounceMs; each new keystroke cancels the previous pending query. Result navigation:

• Up / Down — move selection
• Enter — emit the top (or selected) result
• Escape — close popover

The widget does not own the database; it talks to a HelpSearch instance supplied by the host activity. A dedicated "See all results" item at the end emits seeAllResultsRequested().