opt: bottomnav/searchbar stream debounce

Closes #590

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/pages/home/controller.dart

@@ -114,4 +114,10 @@ class HomeController extends GetxController
       ),
     );
   }
+
+  @override
+  void onClose() {
+    searchBarStream.close();
+    super.onClose();
+  }
 }