feat: 首页、分类页加载数据逻辑重构

miniprogram/pages/category/category.less

@@ -142,8 +142,8 @@
     align-items: center;
     justify-content: center;
     overflow: hidden;
-    border: 1rpx solid #bbb;
-    background: #f0f0f0;
+    border: 1rpx solid rgba(50, 46, 37, 0.08);
+    background: #f5edd8;
 }
 
 .cat-card__thumb-img {
@@ -261,4 +261,46 @@
 .cat-empty__text {
     font-size: 28rpx;
     color: @text-gray;
+}
+
+// ── Skeleton ──
+@keyframes skeleton-pulse {
+    0% {
+        opacity: 0.6;
+    }
+
+    50% {
+        opacity: 0.3;
+    }
+
+    100% {
+        opacity: 0.6;
+    }
+}
+
+.cat-card--skeleton {
+    pointer-events: none;
+
+    .cat-card__thumb {
+        background: #e8e2d5;
+        animation: skeleton-pulse 1.5s ease-in-out infinite;
+    }
+
+    .cat-card__title,
+    .cat-card__subtitle {
+        background: #e8e2d5;
+        border-radius: 8rpx;
+        color: transparent;
+        animation: skeleton-pulse 1.5s ease-in-out infinite;
+    }
+
+    .cat-card__title {
+        width: 60%;
+        height: 32rpx;
+    }
+
+    .cat-card__subtitle {
+        width: 80%;
+        height: 24rpx;
+    }
 }