test(platform-orders): ensure bmpa_processable_only checkbox renders and keeps checked

tests/Feature/AdminPlatformOrderFiltersShouldRenderBmpaProcessableOnlyCheckboxTest.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderFiltersShouldRenderBmpaProcessableOnlyCheckboxTest 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_filters_should_render_bmpa_processable_only_checkbox(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $html = $this->get('/admin/platform-orders')
+            ->assertOk()
+            ->getContent();
+
+        $this->assertStringContainsString('name="bmpa_processable_only"', $html);
+        $this->assertStringContainsString('只看可BMPA处理', $html);
+    }
+
+    public function test_platform_orders_filters_should_keep_checkbox_checked_when_enabled(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $html = $this->get('/admin/platform-orders?bmpa_processable_only=1')
+            ->assertOk()
+            ->getContent();
+
+        // Blade: @checked(...) will output checked="checked"
+        $this->assertStringContainsString('name="bmpa_processable_only" value="1" checked', $html);
+    }
+}