feat(cashier): cashier-only cash operations, exchange PAN/denomination checks and Branch Cash Position

- Cash Exchange Entry: customer details with PAN (mandatory above Rs 50,000), cashier card,
  denomination-wise validation against the master and real-time impact preview.
- Inter-Cashier Transfer: sender fixed to the logged-in cashier, both sides' details and
  denomination holdings shown, blocked until both are allocated cash.
- Reconciliation, exchange and inter-cashier operate on the logged-in cashier only.
- New Branch Cash Position screen (vault + cashier drawers, denomination-wise).
- Customer search dialog shows the KYC PAN.
- Cashier menu cleanup: Excess/Closing report and Exchange Detail removed, nav compacted to one row.
- Reverse actions removed from cash transfer, settlement, exchange and inter-cashier.

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

src/app/cashier/cashier-routing.module.ts

@@ -23,6 +23,7 @@ import { DayBookComponent } from './day-book/day-book.component';
 import { VoucherReportComponent } from './voucher-report/voucher-report.component';
 import { BranchDayComponent } from './branch-day/branch-day.component';
 import { VaultPositionComponent } from './vault-position/vault-position.component';
+import { BranchCashPositionComponent } from './branch-cash-position/branch-cash-position.component';
 import { AccountRegisterComponent } from './account-register/account-register.component';
 import { ClosingCashReportComponent } from './closing-cash-report/closing-cash-report.component';
 import { ExcessTransactionReportComponent } from './excess-transaction-report/excess-transaction-report.component';
@@ -225,6 +226,13 @@ const routes: Routes = [
           component: VaultPositionComponent,
           data: { title: 'Vault Position', breadcrumb: 'Vault Position' }
         },
+        {
+          // What the whole branch holds per denomination: the vault plus every cashier's drawer, so an
+          // exchange (which leaves the vault alone) is visible in the bank's total.
+          path: 'branch-position',
+          component: BranchCashPositionComponent,
+          data: { title: 'Branch Cash Position', breadcrumb: 'Branch Cash Position' }
+        },
         {
           // The same day book the clerk and cashier read, reached from where a principal officer
           // signing the day off actually looks. It carries the Officer Verification Sheet — each