feat(cashier+checker): add cashier deposit maker-checker flow and voucher system

- Add cashier deposit service and submit flow via maker-checker
- New CashierDepositService: submit, approve, reject, list endpoints
- Transaction-entry: cashier SD deposit goes to deposit-requests instead of direct credit
- Checker inbox: new Deposit Requests tab with approve/reject review dialog
- Cashier nav: My Deposit Requests tracking page
- Withdrawal requests: show voucher_no from backend instead of JS-padded id
- clerk-withdrawal.service: disburse denominationData accepts null for non-cash
- Role-based checker enforcement: only manager/head-cashier can approve/reject
- Maker cannot approve own request (self-approval blocked at backend)
- Denomination total validation: breakdown must match transaction amount

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/tasks/checker-inbox-and-tasks-tabs/withdrawal-requests/withdrawal-requests.component.scss

@@ -387,6 +387,18 @@
   font-size: 12px;
 }
 
+.wri-voucher {
+  font-weight: 700;
+  color: #1e40af;
+  letter-spacing: 0.06em;
+}
+
+.wri-token {
+  font-weight: 700;
+  color: #0f766e;
+  letter-spacing: 0.06em;
+}
+
 // Empty state (re-use checker inbox styles)
 .empty-state {
   text-align: center;