fixed back button navigation with drawer (#1711)

mobile/lib/shared/views/tab_controller_page.dart

@@ -111,15 +111,13 @@ class TabControllerPage extends ConsumerWidget {
       ],
       builder: (context, child, animation) {
         final tabsRouter = AutoTabsRouter.of(context);
-        final appRouter = AutoRouter.of(context);
         return WillPopScope(
           onWillPop: () async {
             bool atHomeTab = tabsRouter.activeIndex == 0;
             if (!atHomeTab) {
               tabsRouter.setActiveIndex(0);
-            } else {
-              appRouter.navigateBack();
-            }
+            } 
+
             return atHomeTab;
           },
           child: LayoutBuilder(