feat: dashboard add platform order trend 7d

resources/views/admin/dashboard.blade.php

@@ -82,8 +82,36 @@
 <div class="two-col mb-20" data-role="analysis-skeleton">
     <div class="card">
         <h3 class="mt-0">趋势</h3>
-        <div class="muted">（占位）后续接入：平台订单金额/笔数趋势、续费转化、同步成功率等。</div>
-        <div class="muted muted-xs mt-10">说明：当前阶段先对齐 Ant Design Pro Analysis 的版式骨架，聚合指标后续分步接入。</div>
+        <div class="muted">近7天平台订单（按天）</div>
+
+        @php
+            $trendRows = (array) ($platformOrderTrend7d ?? []);
+        @endphp
+
+        <table class="mt-10" data-role="platform-order-trend-7d">
+            <thead>
+            <tr>
+                <th>日期</th>
+                <th>订单数</th>
+                <th>已付金额</th>
+            </tr>
+            </thead>
+            <tbody>
+            @forelse($trendRows as $row)
+                <tr>
+                    <td>{{ (string) ($row['date'] ?? '') }}</td>
+                    <td>{{ (int) ($row['count'] ?? 0) }}</td>
+                    <td>¥{{ number_format((float) ($row['paid_sum'] ?? 0), 2) }}</td>
+                </tr>
+            @empty
+                <tr>
+                    <td colspan="3" class="muted">暂无数据</td>
+                </tr>
+            @endforelse
+            </tbody>
+        </table>
+
+        <div class="muted muted-xs mt-10">说明：先接入最小可用趋势数据；后续再补时间范围切换、维度切换与可视化图表。</div>
     </div>
     <div class="card">
         <h3 class="mt-0">排行</h3>