feat: unify wallet with real payment methods, full transaction transparency, pay-session-from-wallet

Address wallet feedback: use the clinic's real payment infrastructure,
redesign the tab to match the admin panel, and make every wallet movement
fully auditable.

Backend:
- WalletTransaction: add createdBy (acting user) + createdByName, payment_method,
  reference, status; toArray exposes them (migration Version20260716083939).
- WalletService (Settlement): balance/charge/withdraw + settleSessionFromWallet,
  records actor/method/reason; insufficient balance throws ERR_WALLET_INSUFFICIENT.
- PatientController: charge/withdraw delegate to WalletService and accept
  payment_method/reference; PATCH /session/{uuid} with payment_method=wallet
  debits the patient's final share from the wallet (reference=session:{uuid}).
- docs/api/patient.md updated.

Frontend:
- Wallet modal redesigned to panel style (no gradient); payment method now uses
  the clinic's real bank accounts + POS devices (usePaymentMethods) plus cash.
- Wallet tab: panel balance card + DataTable ledger with columns مبلغ/نوع/روش/
  دلیل/ثبت‌کننده/تاریخ/ساعت/وضعیت + همه/واریزی/برداشت filters.
- Session card «تکمیل پرداخت» opens a payment-method chooser incl. کیف پول.

Tests: backend transparency + session-from-wallet (success/insufficient/cash);
frontend modal (real methods, toman→rials) + wallet tab + settle chooser.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

assets/admin/hooks/usePatientWallet.ts

@@ -8,6 +8,10 @@ export interface WalletTxn {
   type: 'credit' | 'debit' | string;
   description?: string | null;
   balance_after: number;
+  created_by_name?: string | null;
+  payment_method?: string | null;
+  reference?: string | null;
+  status?: string;
   created_at: number;
 }
 
@@ -19,6 +23,8 @@ interface WalletData {
 export interface WalletTxnInput {
   amount_rials: number;
   description?: string;
+  payment_method?: string;
+  reference?: string;
 }
 
 /**