feat: 商品卡片增加编辑按钮，仅上架商品可编辑，状态改为已上架/已下架

src/pages/product/manage.vue

@@ -33,7 +33,7 @@
             :key="item.productId" 
             class="product-item"
           >
-            <view class="product-info" @click="editProduct(item)">
+            <view class="product-info">
               <view class="product-header">
                 <text class="product-name">{{ item.name }}</text>
                 <text class="product-category" v-if="item.categoryName">{{ item.categoryName }}</text>
@@ -45,11 +45,14 @@
               </view>
               <view class="product-status">
                 <text :class="['status', item.status === 1 ? 'on' : 'off']">
-                  {{ item.status === 1 ? '上架' : '下架' }}
+                  {{ item.status === 1 ? '已上架' : '已下架' }}
                 </text>
               </view>
             </view>
             <view class="product-actions">
+              <view class="action-btn edit" @click="editProduct(item)" v-if="item.status === 1">
+                编辑
+              </view>
               <view class="action-btn" @click="toggleStatus(item)">
                 {{ item.status === 1 ? '下架' : '上架' }}
               </view>
@@ -525,6 +528,11 @@ export default {
   margin-bottom: 10rpx;
 }
 
+.action-btn.edit {
+  background: #f0f5ff;
+  color: #667eea;
+}
+
 .action-btn.delete {
   background: #fff1f0;
   color: #ff4d4f;