refactor: 移除polling-store，重构setting-store

src/components/global/theme-switch/theme-switch.vue

@@ -5,14 +5,14 @@ import { storeToRefs } from 'pinia';
 import type { ComponentInstance } from 'vue';
 
 const settingsStore = useSettingStore();
-const { darkThemeEnabled } = storeToRefs(settingsStore);
+const { darkMode } = storeToRefs(settingsStore);
 
 // 使外部能够获取NSwitch的类型提示
 defineExpose({} as ComponentInstance<typeof NSwitch>);
 </script>
 
 <template>
-  <NSwitch v-model:value="darkThemeEnabled">
+  <NSwitch v-model:value="darkMode">
     <template #unchecked-icon>
       <NIcon>
         <svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">