chore(admin-ui): add filters-card component for platform order filters

tests/Feature/AdminPlatformOrdersIndexShouldUseFiltersCardClassesTest.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrdersIndexShouldUseFiltersCardClassesTest 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_admin_platform_orders_index_should_use_filters_card_classes(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $response = $this->get('/admin/platform-orders');
+        $response->assertOk();
+
+        // 护栏：平台订单筛选区应使用统一的 Filters Card 组件类，便于后续全站风格一致。
+        $response->assertSee('filters-card', false);
+        $response->assertSee('filters-summary', false);
+        $response->assertSee('filters-body', false);
+        $response->assertSee('filters-grid', false);
+    }
+}