test: dashboard platform order trend 7d should render

tests/Feature/AdminDashboardPlatformOrderTrend7dCardShouldRenderRowsTest.php

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+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminDashboardPlatformOrderTrend7dCardShouldRenderRowsTest 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_dashboard_platform_order_trend_7d_card_should_render_rows(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $res = $this->get('/admin');
+        $res->assertOk();
+
+        // 趋势卡（近7天）应存在，并渲染 7 天的行（即使当天无数据也补 0）
+        $res->assertSee('data-role="platform-order-trend-7d"', false);
+
+        $html = (string) $res->getContent();
+
+        // 粗略计数：tbody 内应出现 7 次日期文本（YYYY-MM-DD）
+        preg_match_all('/\d{4}-\d{2}-\d{2}/', $html, $m);
+        $this->assertGreaterThanOrEqual(7, count($m[0] ?? []));
+    }
+}