feat: enhance payment status handling and summary in MyPaymentsPage

- Added support for 'partial' payment status in MyPaymentsPage and related components.
- Updated API responses to include 'paid_rials' and 'summary' for invoices.
- Introduced InvoicePaymentStatus service to derive payment status based on actual payments.
- Enhanced tests to cover new payment scenarios including partial payments and payment methods.
- Updated documentation to reflect changes in payment status and API responses.

assets/admin/components/SessionPaymentAccordion.tsx

@@ -1,5 +1,6 @@
 import { ChevronDownIcon } from '@heroicons/react/24/outline';
 import { formatDate, formatRial } from '../lib/utils';
+import { PAYMENT_METHOD_LABELS } from '../lib/paymentMethods';
 import { FilesServicePaymentsCheck } from './icons/FilesServiceIcons';
 
 export interface SessionPaymentData {
@@ -14,10 +15,7 @@ export interface SessionPaymentData {
   updated_at?: number;
 }
 
-const PAYMENT_LABELS: Record<string, string> = {
-  cash: 'نقدی', card: 'کارت', insurance: 'بیمه', online: 'آنلاین', pending: 'در انتظار',
-  wallet: 'کیف پول', pos: 'کارتخوان',
-};
+const PAYMENT_LABELS = PAYMENT_METHOD_LABELS;
 
 /** vertical hairline divider between meta columns (tauri MUI vertical Divider). */
 function VDivider({ h = 24 }: { h?: number }) {