feat(admin): 仪表盘 KPI 聚焦收费主链（套餐/订阅/平台订单）

tests/Feature/AdminDashboardKpiShouldIncludeBillingChainStatsTest.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminDashboardKpiShouldIncludeBillingChainStatsTest 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_kpi_should_include_billing_chain_stats(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $res = $this->get('/admin');
+        $res->assertOk();
+
+        // 收费主链 KPI：套餐/订阅/平台订单
+        $res->assertSee('套餐');
+        $res->assertSee('订阅');
+        $res->assertSee('平台订单');
+    }
+}