feat: 空状态插画 (CSS 简笔平板支撑小人 + 主题色气泡)

pages/records/records.wxml

@@ -65,9 +65,14 @@
         <text class="history-hint" wx:if="{{historyList.length > 0}}">长按可删除</text>
       </view>
       <view wx:if="{{historyList.length === 0}}" class="empty-state">
-        <image class="empty-icon" src="{{icons.peopleFill}}" mode="aspectFit"></image>
+        <view class="empty-illus">
+          <view class="empty-illus-body"></view>
+          <view class="empty-illus-arm empty-illus-arm--l"></view>
+          <view class="empty-illus-arm empty-illus-arm--r"></view>
+          <view class="empty-illus-bubble">开始</view>
+        </view>
         <text class="empty-text">还没有训练记录</text>
-        <text class="empty-sub">开始你的第一次平板支撑吧</text>
+        <text class="empty-sub">完成第一次训练,开启你的坚持!</text>
       </view>
       <view class="history-list">
         <view class="history-item" wx:for="{{historyList}}" wx:key="id" data-id="{{item.id}}" bindlongpress="onLongPressDelete">

pages/records/records.wxss

@@ -277,3 +277,72 @@
   color: var(--text-secondary);
   border-top: 1rpx solid var(--border);
 }
+
+/* ---- empty state illustration ---- */
+.empty-state {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  padding: 60rpx 32rpx;
+}
+
+.empty-illus {
+  position: relative;
+  width: 200rpx;
+  height: 200rpx;
+  margin-bottom: 40rpx;
+}
+
+.empty-illus-body {
+  position: absolute;
+  bottom: 30rpx;
+  left: 50%;
+  transform: translateX(-50%);
+  width: 160rpx;
+  height: 30rpx;
+  background: linear-gradient(90deg, var(--primary), var(--primary-light));
+  border-radius: 16rpx;
+}
+
+.empty-illus-arm {
+  position: absolute;
+  bottom: 36rpx;
+  width: 20rpx;
+  height: 60rpx;
+  background: var(--primary);
+  border-radius: 10rpx;
+}
+
+.empty-illus-arm--l {
+  left: 30rpx;
+  transform: rotate(30deg);
+}
+
+.empty-illus-arm--r {
+  right: 30rpx;
+  transform: rotate(-30deg);
+}
+
+.empty-illus-bubble {
+  position: absolute;
+  top: 0;
+  right: 0;
+  background: var(--primary-bg);
+  color: var(--primary);
+  font-size: 22rpx;
+  font-weight: 600;
+  padding: 8rpx 16rpx;
+  border-radius: 16rpx;
+  line-height: 1;
+}
+
+.empty-text {
+  font-size: 30rpx;
+  color: var(--text);
+  margin-bottom: 12rpx;
+}
+
+.empty-sub {
+  font-size: 26rpx;
+  color: var(--text-secondary);
+}