feat(script-favorite): update toggleFavorite to use backend API

- Import toggleFavoriteScript from epicScript service
- Change toggleFavorite from sync local-only to async with API call
- Implement optimistic update pattern: update local cache first, then call backend
- Rollback on API failure with error toast
- Preserves localFavorites for offline/fast-render scenarios

mini-program/src/pages/main/ScriptLibraryView.vue

@@ -149,6 +149,7 @@
 <script setup>
 import { computed, ref } from 'vue'
 import { useAppStore } from '../../stores/app.js'
+import { toggleFavoriteScript } from '../../services/epicScript.js'
 
 const store = useAppStore()
 const activeType = ref('long')
@@ -316,15 +317,34 @@ const toggleScriptMenu = (script) => {
   activeMenuId.value = activeMenuId.value === id ? '' : id
 }
 
-const toggleFavorite = (script) => {
-  const favorite = isFavorite(script)
+const toggleFavorite = async (script) => {
+  const wasFav = isFavorite(script)
+  // 乐观更新：先改本地缓存
   const next = { ...localFavorites.value }
-  if (favorite) delete next[String(script.id)]
-  else next[String(script.id)] = true
+  if (wasFav) {
+    delete next[String(script.id)]
+  } else {
+    next[String(script.id)] = true
+  }
   localFavorites.value = next
   uni.setStorageSync('script_favorites', next)
   closeScriptMenu()
-  uni.showToast({ title: favorite ? '已取消收藏' : '已收藏', icon: 'success' })
+
+  try {
+    const result = await toggleFavoriteScript(script.id)
+    uni.showToast({ title: result.isFavorited ? '已收藏' : '已取消收藏', icon: 'success' })
+  } catch (error) {
+    // 回滚乐观更新
+    const restored = { ...localFavorites.value }
+    if (wasFav) {
+      restored[String(script.id)] = true
+    } else {
+      delete restored[String(script.id)]
+    }
+    localFavorites.value = restored
+    uni.setStorageSync('script_favorites', restored)
+    uni.showToast({ title: error?.message || '操作失败', icon: 'none' })
+  }
 }
 
 const continueScript = (script) => {