feat(platform-orders): 退款摘要卡数字支持一键跳转筛选（含测试）

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

@@ -156,7 +156,11 @@
     </div>
     <div class="card">
         <h3>有退款订单 / 无退款订单</h3>
-        <div class="metric-number">{{ $summaryStats['refund_orders'] ?? 0 }} / {{ $summaryStats['no_refund_orders'] ?? 0 }}</div>
+        <div class="metric-number">
+            <a class="link" href="{{ request()->fullUrlWithQuery(['refund_status' => 'has', 'page' => null]) }}">{{ $summaryStats['refund_orders'] ?? 0 }}</a>
+            /
+            <a class="link" href="{{ request()->fullUrlWithQuery(['refund_status' => 'none', 'page' => null]) }}">{{ $summaryStats['no_refund_orders'] ?? 0 }}</a>
+        </div>
         <div class="muted muted-xs">口径：refund_summary.total_amount 存在或 refund_receipts 有记录</div>
     </div>
     <div class="card">

tests/Feature/AdminPlatformOrderRefundSummaryCardTest.php

@@ -86,6 +86,8 @@ class AdminPlatformOrderRefundSummaryCardTest extends TestCase
         $this->get('/admin/platform-orders')
             ->assertOk()
             ->assertSee('有退款订单 / 无退款订单')
+            ->assertSee('refund_status=has')
+            ->assertSee('refund_status=none')
             ->assertSee('1')
             ->assertSee('/')
             ->assertSee('1');