Improved json auto save & budget mobile UI

lib/domains/settings/settings_state.dart

@@ -0,0 +1,17 @@
+part of 'settings_bloc.dart';
+
+class SettingsState {
+  final ThemeMode themeMode;
+
+  const SettingsState({
+    this.themeMode = ThemeMode.system,
+  });
+
+  SettingsState copyWith({
+    ThemeMode? themeMode,
+  }) {
+    return SettingsState(
+      themeMode: themeMode ?? this.themeMode,
+    );
+  }
+}