feat(billing): renewals, coupons, VAT numbering, billing cycles and invoice payment tracking

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

app/Services/Concerns/ActivatesPaidInvoices.php

@@ -14,6 +14,7 @@ use App\Models\Invoice;
 use App\Models\OrderItem;
 use App\Models\Service;
 use App\Models\ServiceAddon;
+use App\Services\ActivityLogger;
 use Carbon\Carbon;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Log;
@@ -92,6 +93,7 @@ trait ActivatesPaidInvoices
             ? $service->expires_at
             : now();
         $expiresAt = Carbon::parse($baseDate)->addMonths($months);
+        $previousExpiresAt = $service->expires_at;
 
         $service->update([
             'status' => 'active',
@@ -99,6 +101,21 @@ trait ActivatesPaidInvoices
             'suspended_at' => null,
         ]);
 
+        app(ActivityLogger::class)->log(
+            event: 'renewed',
+            logName: 'Service',
+            description: "Gia hạn dịch vụ #{$service->id} thêm {$months} tháng (hóa đơn #{$invoice->invoice_number})",
+            subject: $service,
+            oldValues: ['expires_at' => $previousExpiresAt?->toDateTimeString()],
+            newValues: [
+                'expires_at' => $expiresAt->toDateTimeString(),
+                'months' => $months,
+                'invoice_number' => $invoice->invoice_number,
+                'amount' => (int) $invoice->total,
+                'payment_method' => $invoice->payment_method,
+            ],
+        );
+
         if ($service->vm_id) {
             dispatch(new VMJobs((int) $service->vm_id, 'Start', false))->delay(now()->addSeconds(5));
         }