fix: the new mobile toolbar doesn't work if resizeToAvoidBottomInset is true (#593)

* fix: toolbar issues

* fix: adjust the mobile toolbar when resizeToAvoidBottomInset is true

example/lib/home_page.dart

@@ -87,14 +87,15 @@ class _HomePageState extends State<HomePage> {
       key: _scaffoldKey,
       extendBodyBehindAppBar: PlatformExtension.isDesktopOrWeb,
       drawer: _buildDrawer(context),
-      resizeToAvoidBottomInset: false,
       appBar: AppBar(
         backgroundColor: const Color.fromARGB(255, 134, 46, 247),
         foregroundColor: Colors.white,
         surfaceTintColor: Colors.transparent,
         title: const Text('AppFlowy Editor'),
       ),
-      body: _buildBody(context),
+      body: SafeArea(
+        child: _buildBody(context),
+      ),
     );
   }