fix: 打开新增/编辑配方时重新加载oils，确保新增产品可搜索

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

frontend/src/views/RecipeManager.vue

@@ -44,7 +44,7 @@
 
     <!-- Action buttons -->
     <div class="action-bar">
-      <button class="action-chip" @click="showAddOverlay = true">新增</button>
+      <button class="action-chip" @click="oils.loadOils(); showAddOverlay = true">新增</button>
       <button class="action-chip" :class="{ active: isAllSelected }" @click="toggleSelectAll">
         全选<span v-if="totalSelected > 0" class="chip-count">{{ totalSelected }}</span>
       </button>
@@ -808,6 +808,7 @@ function editRecipe(recipe) {
   }
   formNote.value = recipe.note || ''
   formTags.value = [...(recipe.tags || [])]
+  oils.loadOils()
   showAddOverlay.value = true
 }