Fix PayPal billing flow and mobile admin UX

tests/Feature/Api/Tenant/BillingReceiptTest.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Tests\Feature\Api\Tenant;
+
+use App\Models\Package;
+use App\Models\PackagePurchase;
+use Tests\Feature\Tenant\TenantTestCase;
+
+class BillingReceiptTest extends TenantTestCase
+{
+    public function test_receipt_endpoint_returns_pdf(): void
+    {
+        $package = Package::factory()->create(['name' => 'Starter']);
+        $purchase = PackagePurchase::factory()->create([
+            'tenant_id' => $this->tenant->id,
+            'package_id' => $package->id,
+            'provider' => 'paypal',
+            'provider_id' => 'ORDER-123',
+            'price' => 49.0,
+        ]);
+
+        $response = $this->authenticatedRequest('GET', '/api/v1/tenant/billing/transactions/'.$purchase->id.'/receipt');
+
+        $response->assertOk();
+        $response->assertHeader('Content-Type', 'application/pdf');
+    }
+}