feat: 下架按钮根据label状态显示已下架

pages/goods-update/goods-update.wxml

@@ -171,10 +171,11 @@
       编辑货源
     </button>
     <button 
-      class="publish-button bottom-button"
+      class="publish-button bottom-button {{goodsDetail.label == 1 ? 'disabled-button' : ''}}"
       bindtap="prepareUnpublishSupply"
+      disabled="{{goodsDetail.label == 1}}"
     >
-      下架
+      {{goodsDetail.label == 1 ? '已下架' : '下架'}}
     </button>
   </view>
 

pages/goods-update/goods-update.wxss

@@ -497,6 +497,15 @@ video.slider-media .wx-video-volume-icon {
   box-shadow: 0 4px 12px rgba(82, 196, 26, 0.3);
 }
 
+/* 已下架按钮样式 */
+.publish-button.bottom-button.disabled-button,
+.publish-button.bottom-button[disabled] {
+  background-color: #d9d9d9;
+  color: #999999;
+  border: 2rpx solid #d9d9d9;
+  box-shadow: none;
+}
+
 /* 返回按钮样式 */
 .back-button.bottom-button {
   background-color: #ffffff;