feat: 人生事件和剧本收藏从 localStorage 切换为真实 API

- 后端：新增 t_event_favorite 表（UNIQUE KEY + MyBatis-Plus Entity）
- 后端：LifeEventController 新增 /favorite/toggle、/favorite/page、/favorite/check 三个真实端点
- 后端：EventFavoriteService 完整 CRUD，含 toggle/分页/批量查询/状态检查
- 后端：删除旧的 favorite-placeholder mock 端点
- 前端：life-event/detail.vue 从 localStorage 假收藏切换为真实 API + localStorage 缓存防闪烁
- 前端：ScriptLibraryView.vue 从 localFavorites 切换为 checkFavoriteScript 真实 API
- 前端：stores/app.js 新增 toggleEventFavorite / checkEventFavorite 方法
- 修复：审核发现的 UNIQUE 约束缺失、未使用 watch 导入、Controller 参数注解遗漏、Controller 委托 Service 构造 Response

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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

@@ -147,9 +147,9 @@
 </template>
 
 <script setup>
-import { computed, ref } from 'vue'
+import { computed, ref, watch } from 'vue'
 import { useAppStore } from '../../stores/app.js'
-import { toggleFavoriteScript } from '../../services/epicScript.js'
+import { toggleFavoriteScript, checkFavoriteScript } from '../../services/epicScript.js'
 
 const store = useAppStore()
 const activeType = ref('long')
@@ -157,7 +157,7 @@ const activeStatus = ref('all')
 const keyword = ref('')
 const sortMode = ref('updated')
 const viewMode = ref('list')
-const localFavorites = ref(uni.getStorageSync('script_favorites') || {})
+const favoriteStatus = ref({})
 const activeMenuId = ref('')
 const deleteTarget = ref(null)
 const deletingScript = ref(false)
@@ -198,6 +198,26 @@ const visibleScripts = computed(() => {
   })
 })
 
+// 列表加载后批量检查收藏状态
+const loadFavoriteStatus = async () => {
+  const ids = scripts.value.map(s => String(s.id)).filter(id => !id.startsWith('demo-'))
+  if (!ids.length) return
+  const status = {}
+  await Promise.all(ids.map(async (id) => {
+    try {
+      status[id] = await checkFavoriteScript(id)
+    } catch {
+      status[id] = false
+    }
+  }))
+  favoriteStatus.value = status
+}
+
+// 监听 scripts 变化时重新加载收藏状态
+watch(scripts, () => {
+  loadFavoriteStatus()
+}, { immediate: true })
+
 const sortLabel = computed(() => {
   const map = { updated: '最近更新⌄', words: '字数最多⌄', progress: '进度最高⌄' }
   return map[sortMode.value] || '最近更新⌄'
@@ -243,7 +263,7 @@ const getProgress = (script) => Math.max(0, Math.min(99, Number(script.progress
 const getInitial = (script) => (script.title || '剧').slice(0, 1)
 
 const isFavorite = (script) => {
-  return Boolean(script.isFavorite || script.favorite || localFavorites.value[String(script.id)])
+  return Boolean(favoriteStatus.value[String(script.id)])
 }
 
 const openScriptChat = (script) => {
@@ -319,15 +339,14 @@ const toggleScriptMenu = (script) => {
 
 const toggleFavorite = async (script) => {
   const wasFav = isFavorite(script)
-  // 乐观更新：先改本地缓存
-  const next = { ...localFavorites.value }
+  // 乐观更新：先改内存状态
+  const next = { ...favoriteStatus.value }
   if (wasFav) {
     delete next[String(script.id)]
   } else {
     next[String(script.id)] = true
   }
-  localFavorites.value = next
-  uni.setStorageSync('script_favorites', next)
+  favoriteStatus.value = next
   closeScriptMenu()
 
   try {
@@ -335,14 +354,13 @@ const toggleFavorite = async (script) => {
     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 }
+    const restored = { ...favoriteStatus.value }
     if (wasFav) {
       restored[String(script.id)] = true
     } else {
       delete restored[String(script.id)]
     }
-    localFavorites.value = restored
-    uni.setStorageSync('script_favorites', restored)
+    favoriteStatus.value = restored
     uni.showToast({ title: error?.message || '操作失败', icon: 'none' })
   }
 }
@@ -383,10 +401,9 @@ const confirmDeleteScript = async () => {
     return
   }
 
-  const next = { ...localFavorites.value }
+  const next = { ...favoriteStatus.value }
   delete next[id]
-  localFavorites.value = next
-  uni.setStorageSync('script_favorites', next)
+  favoriteStatus.value = next
   const conversationId = deleteTarget.value.conversationId || deleteTarget.value.plotJson?.conversationId
   if (conversationId) uni.removeStorageSync(`script_conversation_history_${conversationId}`)
   uni.removeStorageSync(`script_chat_history_${id}`)