添加加载状态指示器

- 在切换供应商时显示加载状态
- 禁用操作按钮防止重复提交
- 提供视觉反馈改善用户体验

src/renderer/components/ProviderList.tsx

@@ -8,6 +8,7 @@ interface ProviderListProps {
   onSwitch: (id: string) => void
   onDelete: (id: string) => void
   onEdit: (id: string) => void
+  isLoading?: boolean
 }
 
 const ProviderList: React.FC<ProviderListProps> = ({
@@ -15,7 +16,8 @@ const ProviderList: React.FC<ProviderListProps> = ({
   currentProviderId,
   onSwitch,
   onDelete,
-  onEdit
+  onEdit,
+  isLoading = false
 }) => {
   return (
     <div className="provider-list">
@@ -52,20 +54,21 @@ const ProviderList: React.FC<ProviderListProps> = ({
                   <button 
                     className="enable-btn"
                     onClick={() => onSwitch(provider.id)}
-                    disabled={isCurrent}
+                    disabled={isCurrent || isLoading}
                   >
-                    启用
+                    {isLoading ? '处理中...' : '启用'}
                   </button>
                   <button 
                     className="edit-btn"
                     onClick={() => onEdit(provider.id)}
+                    disabled={isLoading}
                   >
                     编辑
                   </button>
                   <button 
                     className="delete-btn"
                     onClick={() => onDelete(provider.id)}
-                    disabled={isCurrent}
+                    disabled={isCurrent || isLoading}
                   >
                     删除
                   </button>