opt: bottomnav/searchbar stream debounce

Closes #590

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

lib/pages/main/controller.dart

@@ -213,4 +213,10 @@ class MainController extends GetxController {
             })
         .toList();
   }
+
+  @override
+  void onClose() {
+    bottomBarStream.close();
+    super.onClose();
+  }
 }

lib/pages/main/view.dart

@@ -1,4 +1,3 @@
-import 'dart:async';
 import 'dart:io';
 
 import 'package:PiliPlus/common/widgets/network_img_layer.dart';
@@ -19,6 +18,7 @@ import 'package:PiliPlus/utils/feed_back.dart';
 import 'package:PiliPlus/utils/storage.dart';
 import 'package:material_design_icons_flutter/material_design_icons_flutter.dart';
 import './controller.dart';
+import 'package:stream_transform/stream_transform.dart';
 
 class MainApp extends StatefulWidget {
   const MainApp({super.key});
@@ -265,7 +265,8 @@ class _MainAppState extends State<MainApp>
               : StreamBuilder(
                   stream: _mainController.hideTabBar
                       ? _mainController.bottomBarStream.stream
-                      : StreamController<bool>.broadcast().stream,
+                          .throttle(const Duration(milliseconds: 500))
+                      : null,
                   initialData: true,
                   builder: (context, AsyncSnapshot snapshot) {
                     return AnimatedSlide(