fix: collapse button display color in dark mode

frontend/app_flowy/lib/workspace/presentation/home/navigation.dart

@@ -53,6 +53,8 @@ class FlowyNavigation extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final theme = context.watch<AppTheme>();
+
     return ChangeNotifierProxyProvider<HomeStackNotifier, NavigationNotifier>(
       create: (_) {
         final notifier = Provider.of<HomeStackNotifier>(context, listen: false);
@@ -66,7 +68,7 @@ class FlowyNavigation extends StatelessWidget {
         child: Row(children: [
           Selector<NavigationNotifier, PublishNotifier<bool>>(
               selector: (context, notifier) => notifier.collapasedNotifier,
-              builder: (ctx, collapsedNotifier, child) => _renderCollapse(ctx, collapsedNotifier)),
+              builder: (ctx, collapsedNotifier, child) => _renderCollapse(ctx, collapsedNotifier, theme)),
           Selector<NavigationNotifier, List<NavigationItem>>(
             selector: (context, notifier) => notifier.navigationItems,
             builder: (ctx, items, child) => Expanded(
@@ -81,8 +83,7 @@ class FlowyNavigation extends StatelessWidget {
     );
   }
 
-  Widget _renderCollapse(BuildContext context, PublishNotifier<bool> collapsedNotifier) {
-    final theme = context.watch<AppTheme>();
+  Widget _renderCollapse(BuildContext context, PublishNotifier<bool> collapsedNotifier, AppTheme theme) {
     return ChangeNotifierProvider.value(
       value: collapsedNotifier,
       child: Consumer(