feat：在多个组件中添加onActivated钩子以优化数据加载逻辑

src/pages/discover.vue

@@ -30,6 +30,10 @@ async function loadExtraDiscoverSources() {
 onMounted(async () => {
   await loadExtraDiscoverSources()
 })
+
+onActivated(async () => {
+  loadExtraDiscoverSources()
+})
 </script>
 
 <template>

src/pages/downloading.vue

@@ -29,6 +29,10 @@ function jumpTab(tab: string) {
 onMounted(async () => {
   await loadDownloaderSetting()
 })
+
+onActivated(async () => {
+  loadDownloaderSetting()
+})
 </script>
 
 <template>

src/pages/recommend.vue

@@ -145,6 +145,10 @@ onBeforeMount(async () => {
 onMounted(async () => {
   await loadExtraRecommendSources()
 })
+
+onActivated(async () => {
+  loadExtraRecommendSources()
+})
 </script>
 
 <template>

src/views/subscribe/SubscribeListView.vue

@@ -128,7 +128,7 @@ onMounted(async () => {
 
 onActivated(async () => {
   if (!loading.value) {
-    await fetchData()
+    fetchData()
   }
 })
 </script>