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 <noreply@anthropic.com>

src/ui/cycle_popup.rs

@@ -59,7 +59,7 @@ fn item_row(handle: acadrust::Handle, label: String) -> Element<'static, Message
     // Highlight the underlying object while the cursor is over this row.
     mouse_area(btn)
         .on_enter(Message::CycleHover(Some(handle)))
-        .on_exit(Message::CycleHover(None))
+        .on_exit(Message::CycleHoverExit(handle))
         .into()
 }