Replace issue date column with payment date in invoices list

Shows when the invoice was last paid instead of when it was created.
List is already sorted by paid_at DESC.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

resources/views/livewire/invoices/invoice-list.blade.php

@@ -211,7 +211,7 @@ class="w-full px-4 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:rin
                         <th class="px-4 py-3 text-center font-medium text-gray-600">{{ __('المتبقي') }}</th>
                         <th class="px-4 py-3 text-center font-medium text-gray-600">{{ __('الحالة') }}</th>
                         <th class="px-4 py-3 text-center font-medium text-gray-600">{{ __('طريقة الدفع') }}</th>
-                        <th class="px-4 py-3 text-center font-medium text-gray-600">{{ __('تاريخ الإصدار') }}</th>
+                        <th class="px-4 py-3 text-center font-medium text-gray-600">{{ __('تاريخ الدفع') }}</th>
                         <th class="px-4 py-3 text-center font-medium text-gray-600">{{ __('إجراءات') }}</th>
                     </tr>
                 </thead>
@@ -278,7 +278,7 @@ class="w-full px-4 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:rin
                             @endif
                         </td>
                         <td class="px-4 py-3 text-center text-gray-600" dir="ltr">
-                            {{ $invoice->issue_date?->format('Y-m-d') }}
+                            {{ $invoice->paid_at?->format('Y-m-d') ?? '—' }}
                         </td>
                         <td class="px-4 py-3 text-center space-x-2 space-x-reverse">
                             @can('invoices.view')