chore(admin-ui): plans index uses page header

resources/views/admin/plans/index.blade.php

@@ -35,15 +35,19 @@
 
     $planIndexUrl = \App\Support\BackUrl::withBack('/admin/plans', $safeBackForLinks);
 @endphp
-<div class="card mb-20">
-    <p class="muted muted-tight">这里是总台视角的套餐目录页，用于沉淀平台可售卖的标准能力包。</p>
-    <p class="muted">当前阶段先完成套餐主数据可见、可筛与口径收拢，后续再接授权项、售价规则与上下架动作。</p>
-
-    @if($safeBackForLinks !== '')
-        <div class="mt-10">
-            <a href="{!! $safeBackForLinks !!}" class="muted">← 返回上一页（保留上下文）</a>
+<div class="page-header mb-20" data-page="admin.plans.index">
+    <div class="page-header-main">
+        <div>
+            <div class="page-header-title">套餐管理</div>
+            <div class="page-header-subtitle">这里是总台视角的套餐目录页，用于沉淀平台可售卖的标准能力包。当前阶段先完成套餐主数据可见、可筛与口径收拢，后续再接授权项、售价规则与上下架动作。</div>
         </div>
-    @endif
+
+        <div class="page-header-actions">
+            @if($safeBackForLinks !== '')
+                <a href="{!! $safeBackForLinks !!}" class="btn btn-secondary btn-sm">返回上一页（保留上下文）</a>
+            @endif
+        </div>
+    </div>
 </div>
 
 <div class="card mb-20">