fix: 更新新用户优惠券图片链接并添加调试日志

- 将新用户优惠券相关图片链接统一更新为新的CDN地址
- 在store中添加console.log调试setNewUserCoupon方法
- 移除不再使用的本地图片变量

pages/components/NewUserCoupon.vue

@@ -6,7 +6,7 @@
                 <view style="position: relative;">
                     <image class="coupon-image"
                     style="height: 800rpx;"
-                    src="http://wxa.mp.video.tencent-cloud.com/271/20304/stodownload?m=e32f5f803d62036cc76c2de769355081&filekey=30340201010420301e0202010f040253480410e32f5f803d62036cc76c2de76935508102020d9e040d00000004627466730000000132&hy=SH&storeid=2689416ee0007c1f4000000000000010f00004f50534805aab171568b33d14&bizid=1023"
+                    src="https://image.hhlm1688.com/2025/08/08168577fd3c2c428785038ee249736e54Rectangle 9031@3x.png"
                     mode="aspectFill"></image>
 
                     <image 
@@ -43,7 +43,7 @@ export default {
     data() {
         return {
             showPopup: true,
-            image : 'https://img.teyizhao.com/2025-08-07/a7535f42-6726-4630-9552-6940331ddb8b.png',
+            image : '',
         }
     },
     computed : {

pages_order/newUser/index.vue

@@ -2,7 +2,7 @@
     <view class="new-user-page">
         <!-- 背景图片 -->
         <image class="bg-image"
-            src="http://wxa.mp.video.tencent-cloud.com/271/20304/stodownload?m=e32f5f803d62036cc76c2de769355081&filekey=30340201010420301e0202010f040253480410e32f5f803d62036cc76c2de76935508102020d9e040d00000004627466730000000132&hy=SH&storeid=2689416ee0007c1f4000000000000010f00004f50534805aab171568b33d14&bizid=1023"
+            src="https://image.hhlm1688.com/2025/08/08168577fd3c2c428785038ee249736e54Rectangle 9031@3x.png"
             mode="aspectFill" />
 
         <!-- 顶部标题图片 -->
@@ -37,7 +37,7 @@ export default {
     data() {
         return {
             isReceived: false, // 优惠券是否已领取
-            image : 'https://img.teyizhao.com/2025-08-07/a7535f42-6726-4630-9552-6940331ddb8b.png',
+            image : '',
         }
     },
     computed : {