pub fn find_in_install(app: &mut AppState, forward: bool)Expand description
What: Advance selection in the Install pane to the next/previous item matching the pane-find pattern.
Input: app mutable application state; forward when true searches downward, else upward
Output: No return value; updates install_state selection when a match is found
Details: Operates on visible indices and tests case-insensitive matches against package name or description; wraps around the list.