feat(admin-dashboard): sync trend/billing card height with recent orders

resources/views/admin/dashboard.blade.php

@@ -78,7 +78,7 @@
 </div>
 
 <div class="two-col mb-20" data-role="analysis-skeleton">
-    <div class="card">
+    <div class="card" data-role="dashboard-card-trend">
         <h3 class="mt-0">趋势</h3>
         <div class="muted">近7天｜平台订单（按天）</div>
 
@@ -248,7 +248,7 @@
 </div>
 
 <div class="two-col mb-20">
-    <div class="card" id="billing-workbench">
+    <div class="card" id="billing-workbench" data-role="dashboard-card-billing-workbench">
         <h3 class="mt-0">收费工作台（快捷治理）</h3>
         <div class="muted">聚焦收费闭环的日常治理入口：订单 → 订阅 → 套餐。</div>
 
@@ -298,7 +298,7 @@
 </div>
 
 <div class="two-col mb-20" data-role="analysis-skeleton-row2">
-    <div class="card">
+    <div class="card" data-role="dashboard-card-recent-platform-orders">
         <div class="flex-between">
             <h3 class="mt-0">最近平台订单</h3>
             @php