refactor: 移除polling-store，重构setting-store

src/pages/station/station-page.vue

@@ -11,7 +11,7 @@ import { storeToRefs } from 'pinia';
 import { computed, ref } from 'vue';
 
 const settingStore = useSettingStore();
-const { stationGridCols: stationGridColumns } = storeToRefs(settingStore);
+const { stationGridCols } = storeToRefs(settingStore);
 
 const stationStore = useStationStore();
 const { stations } = storeToRefs(stationStore);
@@ -174,7 +174,7 @@ const onClickDetail: StationCardProps['onClickDetail'] = (type, station) => {
     </NFlex>
 
     <!-- 车站 -->
-    <NGrid :cols="stationGridColumns" :x-gap="6" :y-gap="6" style="padding: 8px">
+    <NGrid :cols="stationGridCols" :x-gap="6" :y-gap="6" style="padding: 8px">
       <NGridItem v-for="station in stations" :key="station.code">
         <StationCard
           :station="station"