Add feature guard for refund receipt status transition tolerance config

tests/Feature/AdminPlatformOrderRefundReceiptToleranceConfigTest.php

@@ -0,0 +1,79 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderRefundReceiptToleranceConfigTest 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_add_refund_receipt_pushes_status_to_refunded_when_within_tolerance(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        // 设置较大的容差，验证 addRefundReceipt 的推进口径为：refund_total + tol >= paid
+        config(['saasshop.amounts.tolerance' => 0.50]);
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'refund_receipt_tol_plan_01',
+            'name' => '退款回执容差配置测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_REFUND_RECEIPT_TOL_0001',
+            'order_type' => 'new_purchase',
+            'status' => 'activated',
+            'payment_status' => 'paid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 10,
+            'paid_amount' => 10,
+            'placed_at' => now(),
+            'paid_at' => now(),
+            'activated_at' => now(),
+            'meta' => [],
+        ]);
+
+        // 退款 9.60；在 tol=0.50 下，应推进到 refunded
+        $this->post('/admin/platform-orders/' . $order->id . '/add-refund-receipt', [
+            'type' => 'refund',
+            'channel' => 'wechat',
+            'amount' => 9.60,
+            'refunded_at' => now()->format('Y-m-d H:i:s'),
+            'note' => '容差测试退款回执',
+        ])->assertRedirect();
+
+        $order->refresh();
+        $this->assertSame('refunded', $order->payment_status);
+        $this->assertNotNull($order->refunded_at);
+
+        $refundSummaryTotal = (float) data_get($order->meta, 'refund_summary.total_amount');
+        $this->assertSame(9.60, $refundSummaryTotal);
+    }
+}