feat(frontend): linked SKU 已选区补充关联商品详情跳转入口

cfc-frontend/pages/discover-detail/product-detail/product-detail.vue

@@ -57,6 +57,7 @@
         </view>
         <view v-if="selectedSku" class="selected-summary">
           <text class="selected-text">已选: {{ buildSpecDesc() }}</text>
+          <text v-if="selectedSku.linkedProductId" class="linked-link" @click="goLinkedProduct(selectedSku.linkedProductId)">查看关联商品详情 ›</text>
         </view>
       </view>
 
@@ -493,6 +494,12 @@ export default {
       })
     },
 
+    goLinkedProduct: function(productId) {
+      uni.navigateTo({
+        url: '/pages/discover-detail/product-detail/product-detail?id=' + productId
+      })
+    },
+
     buildSpecDesc: function() {
       if (!this.selectedSku) return ''
       var desc = ''
@@ -849,6 +856,13 @@ export default {
   font-size: 24rpx;
   color: #F97316;
 }
+.linked-link {
+  display: inline-block;
+  margin-left: 20rpx;
+  font-size: 24rpx;
+  color: #0EA5E9;
+  text-decoration: underline;
+}
 /* CF值提示 */
 .cf-hint-row {
   display: flex;