feat(admin-dashboard): add 7d trend meta summary

public/css/admin-components.css

@@ -322,6 +322,25 @@
     box-shadow:var(--adm-shadow-sm);
 }
 
+/* 迷你图表的摘要行（用于展示合计/峰值等口径，参考 Ant Design Pro 的 card extra/meta 文案） */
+.adm-mini-meta{
+    margin-top:8px;
+    display:flex;
+    flex-wrap:wrap;
+    gap:6px;
+    align-items:center;
+    color:var(--adm-text-secondary, #64748b);
+    font-size:12px;
+}
+
+.adm-mini-meta-item strong{
+    color:var(--adm-text, #0f172a);
+}
+
+.adm-mini-meta-sep{
+    color:var(--adm-text-muted, #94a3b8);
+}
+
 .adm-mini-chart.is-empty,
 .adm-mini-rank.is-empty,
 .adm-mini-share.is-empty{

resources/views/admin/dashboard.blade.php

@@ -97,6 +97,24 @@
 
         <div class="adm-mini-chart" data-role="platform-order-trend-7d-chart" data-points='@json($trendPoints)'></div>
 
+        @php
+            $trendPaidTotal = 0.0;
+            $trendOrdersTotal = 0;
+            $trendPaidMax = 0.0;
+            foreach ($trendRows as $r) {
+                $trendPaidTotal += (float) ($r['paid_sum'] ?? 0);
+                $trendOrdersTotal += (int) ($r['count'] ?? 0);
+                $trendPaidMax = max($trendPaidMax, (float) ($r['paid_sum'] ?? 0));
+            }
+        @endphp
+        <div class="adm-mini-meta" data-role="platform-order-trend-7d-meta">
+            <span class="adm-mini-meta-item">7天合计已付：<strong>¥{{ number_format($trendPaidTotal, 2) }}</strong></span>
+            <span class="adm-mini-meta-sep">｜</span>
+            <span class="adm-mini-meta-item">7天订单数：<strong>{{ (int) $trendOrdersTotal }}</strong></span>
+            <span class="adm-mini-meta-sep">｜</span>
+            <span class="adm-mini-meta-item">峰值：<strong>¥{{ number_format($trendPaidMax, 2) }}</strong></span>
+        </div>
+
         <table class="mt-10" data-role="platform-order-trend-7d">
             <thead>
             <tr>

tests/Feature/AdminDashboardPlatformOrderTrend7dShouldRenderTest.php

@@ -79,6 +79,7 @@ class AdminDashboardPlatformOrderTrend7dShouldRenderTest extends TestCase
 
         $res->assertSee('data-role="platform-order-trend-7d"', false);
         $res->assertSee('data-role="platform-order-trend-7d-chart"', false);
+        $res->assertSee('data-role="platform-order-trend-7d-meta"', false);
         $res->assertSee('近7天平台订单（按天）');
 
         // 断言日期行出现（只验证两个代表点）