测试: 补齐摘要区总数链接护栏

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

@@ -641,7 +641,9 @@
 <div class="grid-3 mb-20">
     <div class="card">
         <h3>平台订单总数</h3>
-        <div class="metric-number">{{ $summaryStats['total_orders'] ?? 0 }}</div>
+        <div class="metric-number">
+            <a data-role="po-summary-link-total-orders" class="link" href="{!! $safeFullUrlWithQuery(['page' => null]) !!}">{{ $summaryStats['total_orders'] ?? 0 }}</a>
+        </div>
     </div>
     <div class="card">
         <h3>已支付 / 已生效</h3>

tests/Feature/AdminPlatformOrderIndexSummaryTotalOrdersLinkShouldHaveDataRoleAndKeepBackTest.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderIndexSummaryTotalOrdersLinkShouldHaveDataRoleAndKeepBackTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_platform_orders_index_summary_total_orders_link_should_have_data_role_and_keep_back(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $res = $this->get('/admin/platform-orders?merchant_id=1&plan_id=2&back=/admin&page=2');
+        $res->assertOk();
+
+        $html = (string) $res->getContent();
+
+        $re = '/<a[^>]*data-role="po-summary-link-total-orders"[^>]*href="([^"]+)"/u';
+        $this->assertMatchesRegularExpression($re, $html);
+        preg_match($re, $html, $m);
+
+        $rawHref = (string) ($m[1] ?? '');
+        $this->assertStringNotContainsString('&amp;back=', $rawHref);
+
+        $href = html_entity_decode($rawHref);
+        $query = parse_url($href, PHP_URL_QUERY) ?: '';
+        parse_str($query, $q);
+
+        $this->assertSame('1', (string) ($q['merchant_id'] ?? ''));
+        $this->assertSame('2', (string) ($q['plan_id'] ?? ''));
+        $this->assertSame('/admin', (string) ($q['back'] ?? ''));
+        $this->assertArrayNotHasKey('page', $q);
+    }
+}