feat(ui): support running as menubar app (#1216)

ui/flutter/lib/database/database.dart

@@ -10,6 +10,7 @@ const String _windowState = 'windowState';
 const String _bookmark = 'bookmark';
 const String _createHistory = 'createHistory';
 const String _webToken = 'webToken';
+const String _runAsMenubarApp = 'runAsMenubarApp';
 
 class Database {
   static final Database _instance = Database._internal();
@@ -109,4 +110,12 @@ class Database {
   void clearCreateHistory() {
     clear(_createHistory);
   }
+
+  void saveRunAsMenubarApp(bool value) {
+    box.put(_runAsMenubarApp, value);
+  }
+
+  bool getRunAsMenubarApp() {
+    return box.get(_runAsMenubarApp, defaultValue: false) as bool;
+  }
 }