fix: 标签筛选时自动展开配方列表

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/views/RecipeManager.vue

@@ -109,7 +109,7 @@
         <span v-if="!auth.isAdmin" class="contrib-tag">已贡献 {{ sharedCount.adopted }}/{{ sharedCount.total }} 条</span>
         <span class="toggle-icon">{{ showMyRecipes ? '▾' : '▸' }}</span>
       </h3>
-      <template v-if="showMyRecipes || manageSearch">
+      <template v-if="showMyRecipes || manageSearch || selectedTags.length">
       <div class="recipe-list">
         <div
           v-for="d in myFilteredRecipes"
@@ -149,7 +149,7 @@
         <span>🌿 公共配方库 ({{ publicRecipes.length }})</span>
         <span class="toggle-icon">{{ showPublicRecipes ? '▾' : '▸' }}</span>
       </h3>
-      <div v-if="showPublicRecipes || manageSearch" class="recipe-list">
+      <div v-if="showPublicRecipes || manageSearch || selectedTags.length" class="recipe-list">
         <div
           v-for="r in publicFilteredRecipes"
           :key="r._id"