fix(flutter): 回退底部导航为四槽

lib/pages/home/home_view.dart

@@ -195,10 +195,6 @@ class _HomeTabsState extends State<_HomeTabs> {
   Widget _nav(BuildContext context, AppLocalizations l10n) {
     return AppBottomNav(
       barKey: const Key('home-tabs-bar'),
-      centerAction: AppBottomNavCenterAction(
-        label: l10n.createTab,
-        onTap: () => _selectTab(context, 2),
-      ),
       items: [
         _navItem(context, l10n, 0),
         _navItem(context, l10n, 1),