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/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.

src/app/update.rs

@@ -3649,6 +3649,15 @@ impl OpenCADStudio {
                 self.tabs[i].scene.set_hover_highlight(handle);
                 Task::none()
             }
+            Message::CycleHoverExit(handle) => {
+                // Only clear if another row hasn't already taken the highlight;
+                // enter/exit can fire out of order when moving between rows.
+                let i = self.active_tab;
+                if self.tabs[i].scene.hover_highlight == Some(handle) {
+                    self.tabs[i].scene.set_hover_highlight(None);
+                }
+                Task::none()
+            }
             Message::CycleCancel => {
                 self.cycle_candidates = None;
                 self.tabs[self.active_tab].scene.set_hover_highlight(None);

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()
 }