新增加菜品后，处理需要程序重启才生效的Bug

exp_multimodal/exp_multimodal_gui.py

@@ -792,6 +792,9 @@ class MultiModalFoodApp:
             self.root.after(0, lambda: messagebox.showinfo("成功", f"索引构建完成！默认菜品：{len(default_labels)}个，自定义菜品：{len(self.custom_dishes)}个，总计：{len(all_labels)}个"))
             self.root.after(0, lambda: self.openset_status_label.configure(text=f"索引已构建 ({len(all_labels)}个菜品)", text_color="green"))
             
+            # 新增：重新加载索引到内存
+            self.root.after(0, self.reload_openset_matcher)
+            
         except Exception as e:
             self.root.after(0, lambda: messagebox.showerror("错误", f"构建索引失败: {e}"))
             self.root.after(0, lambda: self.openset_status_label.configure(text="构建失败", text_color="red"))
@@ -824,6 +827,32 @@ class MultiModalFoodApp:
             messagebox.showerror("错误", f"索引测试失败: {e}")
             self.openset_status_label.configure(text="索引无效", text_color="red")
 
+    def reload_openset_matcher(self):
+        """重新加载向量索引（用于索引更新后刷新）"""
+        try:
+            index_path = self.openset_index_path_var.get()
+            
+            # 检查索引是否存在
+            required_files = ["dish_names.json", "dish_embeddings.npy", "faiss_index.bin"]
+            for fname in required_files:
+                if not os.path.exists(os.path.join(index_path, fname)):
+                    print(f"[ReloadMatcher] 索引文件不完整，缺少: {fname}")
+                    return False
+            
+            # 重新创建 matcher 和 embedder
+            embedder_url = self.ollama_url_var.get().strip() or DEFAULT_OLLAMA_URL
+            embedder_model = self.openset_embedder_model_var.get().strip()
+            self.openset_embedder = OllamaEmbedder(base_url=embedder_url, model=embedder_model)
+            self.openset_matcher = DishNameMatcher(index_dir=index_path)
+            
+            num_dishes = len(self.openset_matcher.dish_names)
+            print(f"[ReloadMatcher] 成功重载索引，包含 {num_dishes} 个菜品")
+            return True
+            
+        except Exception as e:
+            print(f"[ReloadMatcher] 重载失败: {e}")
+            return False
+
     # -------------------- 识别流程 --------------------
     def start_recognition(self):
         if not self.uploaded_images:
@@ -1298,10 +1327,10 @@ class MultiModalFoodApp:
         
         messagebox.showinfo("成功", f"已添加菜品：{dish_name}")
         
-        # 询问是否立即重建索引
+        # 自动重建索引（后台线程，不阻塞UI）
         if self.auto_rebuild_index_var.get():
-            if messagebox.askyesno("重建索引", "是否立即重建向量索引？"):
-                self.build_openset_index()
+            self.openset_status_label.configure(text="正在自动重建索引...", text_color="orange")
+            threading.Thread(target=self._build_index_thread, daemon=True).start()
     
     def import_dishes_from_json(self):
         """从JSON文件批量导入菜品"""
@@ -1345,13 +1374,15 @@ class MultiModalFoodApp:
             
             messagebox.showinfo(
                 "导入完成",
-                f"成功导入 {added_count} 个新菜品"       f"（总计导入{len(new_dishes)}个，其中{len(new_dishes)-added_count}个已存在）" +  f"当前自定义菜品数：{len(self.custom_dishes)}"
+                f"成功导入 {added_count} 个新菜品" +
+                f"（总计导入{len(new_dishes)}个，其中{len(new_dishes)-added_count}个已存在）" +
+                f"当前自定义菜品数：{len(self.custom_dishes)}"
             )
             
-            # 询问是否重建索引
+            # 自动重建索引（后台线程）
             if self.auto_rebuild_index_var.get() and added_count > 0:
-                if messagebox.askyesno("重建索引", f"已添加{added_count}个新菜品，是否立即重建向量索引？"):
-                    self.build_openset_index()
+                self.openset_status_label.configure(text="正在自动重建索引...", text_color="orange")
+                threading.Thread(target=self._build_index_thread, daemon=True).start()
                     
         except Exception as e:
             messagebox.showerror("错误", f"导入失败: {e}")