Reveal hidden tray icons while the panel is open

Pressing a tray tile did nothing visible because the item was hidden
off-screen, so its menu opened where it could not be seen. Temporarily
put the icons back on the menu bar while the panel is open, so clicking
a tile opens that app's real menu in view.

💘 Generated with Crush

Assisted-by: Crush:deepseek-v4.1-flash

Sources/SimpleTopBar/MenuBarItems.swift

@@ -252,6 +252,22 @@ final class MenuBarHider: ObservableObject {
         isHiding = hiding
     }
 
+    /// Temporarily reveal the items (e.g. while the panel is open) so pressing
+    /// a tray icon opens its menu at its real, on-screen position. Keeps the
+    /// user's `enabled` preference untouched.
+    func suspend() {
+        guard enabled else { return }
+        spacer?.length = 0
+        isHiding = false
+    }
+
+    /// Restore hiding after a `suspend()`.
+    func resume() {
+        guard enabled else { return }
+        spacer?.length = Self.hiddenLength
+        isHiding = true
+    }
+
     /// Put the menu bar back the way we found it. Called on quit. Leaves the
     /// user's preference intact.
     func restore() {