fix(statusbar): cycling-list hover highlight on row re-entry

Row exit now clears the preview only when the highlight still points at
that row. Moving between rows can fire on_enter before the previous
row's on_exit, so the unconditional clear wiped a freshly highlighted
row (notably when returning to the first row). Guarding the clear fixes
the highlight not reappearing.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

src/app/mod.rs

@@ -769,6 +769,9 @@ pub enum Message {
     CycleSelect(acadrust::Handle),
     /// Preview (highlight) a cycling-list row's object, or clear with `None`.
     CycleHover(Option<acadrust::Handle>),
+    /// Cursor left a cycling-list row; clear the preview only if it still
+    /// points at this row (guards against enter/exit event reordering).
+    CycleHoverExit(acadrust::Handle),
     /// Dismiss the selection-cycling list box without picking.
     CycleCancel,
     /// Toggle the selection-filter type picker open/closed.