深色模式、首页设置页面和功能优化

ohos/entry/src/main/ets/pages/WidgetSettings.ets

@@ -1,5 +1,6 @@
 import { router } from '@kit.ArkUI';
 import { preferences } from '@kit.ArkData';
+import { common } from '@kit.AbilityKit';
 //todo 重要 后续 刷新按钮要求固定显示
 @Entry
 @Component
@@ -45,7 +46,7 @@ struct WidgetSettings {
   async saveSettings() {
     try {
       if (!this.preference) {
-        const context = getContext(this);
+        const context = getContext(this) as common.UIAbilityContext;
         this.preference = await preferences.getPreferences(context, 'widget_settings');
       }
       console.info('[WidgetSettings] Saving settings - showTime: ' + this.showTime + ', showWeather: ' + this.showWeather);