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/cash-history/cash-history.component.ts

@@ -8,9 +8,7 @@
 
 import { Component, OnInit, inject } from '@angular/core';
 import { CommonModule } from '@angular/common';
-import { FormsModule } from '@angular/forms';
 import { MatIconModule } from '@angular/material/icon';
-import { MatSnackBar, MatSnackBarModule } from '@angular/material/snack-bar';
 import { MatTabsModule } from '@angular/material/tabs';
 import { MatPaginatorModule, PageEvent } from '@angular/material/paginator';
 import { forkJoin, of } from 'rxjs';
@@ -31,6 +29,8 @@ interface TxnRow {
   reversedBy: number | null;
   reversedAt: string | null;
   reverseReason: string | null;
+  /** Customer PAN recorded on a cash exchange. */
+  panNumber?: string | null;
   type: 'transfer' | 'settlement' | 'inter' | 'exchange';
 }
 
@@ -52,7 +52,10 @@ interface DetailView {
   loading: boolean;
 }
 
-/** Unified history of all cash movements with reversal and detail view support. */
+/**
+ * Unified history of all cash movements with a detail view. Read-only: cash movements cannot be reversed
+ * from here (an earlier reversal still shows as Reversed, with who, when and why).
+ */
 @Component({
   selector: 'mifosx-cash-history',
   templateUrl: './cash-history.component.html',
@@ -63,16 +66,13 @@ interface DetailView {
   standalone: true,
   imports: [
     CommonModule,
-    FormsModule,
     MatIconModule,
-    MatSnackBarModule,
     MatTabsModule,
     MatPaginatorModule
   ]
 })
 export class CashHistoryComponent implements OnInit {
   private service = inject(CashierService);
-  private snackBar = inject(MatSnackBar);
 
   transfers: TxnRow[] = [];
   settlements: TxnRow[] = [];
@@ -99,10 +99,6 @@ export class CashHistoryComponent implements OnInit {
 
   private denomKindMap = new Map<number, 'note' | 'coin'>();
 
-  reversingId: number | null = null;
-  reversingType: string | null = null;
-  reverseReason = '';
-
   detail: DetailView | null = null;
 
   ngOnInit(): void {
@@ -212,7 +208,8 @@ export class CashHistoryComponent implements OnInit {
       this.exchanges = (exchangeItems as any[]).map((e) => ({
         id: e.id,
         date: e.exchangeDate,
-        fromParty: e.accountNo ? `Account ${e.accountNo}` : 'Walk-in Customer',
+        fromParty: this.exchangeParty(e),
+        panNumber: e.panNumber ?? null,
         toParty: e.performedByUsername || '—',
         amount: e.exchangeAmount,
         note: e.note,
@@ -310,7 +307,8 @@ export class CashHistoryComponent implements OnInit {
         this.exchanges = (res.pageItems ?? []).map((e: any) => ({
           id: e.id,
           date: e.exchangeDate,
-          fromParty: e.accountNo ? `Account ${e.accountNo}` : 'Walk-in Customer',
+          fromParty: this.exchangeParty(e),
+          panNumber: e.panNumber ?? null,
           toParty: e.performedByUsername || '—',
           amount: e.exchangeAmount,
           note: e.note,
@@ -392,39 +390,12 @@ export class CashHistoryComponent implements OnInit {
     this.detail = null;
   }
 
-  startReverse(row: TxnRow): void {
-    this.reversingId = row.id;
-    this.reversingType = row.type;
-    this.reverseReason = '';
-  }
-
-  cancelReverse(): void {
-    this.reversingId = null;
-    this.reversingType = null;
-    this.reverseReason = '';
-  }
-
-  confirmReverse(): void {
-    if (!this.reversingId || !this.reversingType) return;
-    const id = this.reversingId;
-    const type = this.reversingType;
-    const reason = this.reverseReason;
-    this.cancelReverse();
-
-    let obs$;
-    if (type === 'transfer') obs$ = this.service.reverseCashTransfer(id, reason);
-    else if (type === 'settlement') obs$ = this.service.reverseCashSettlement(id, reason);
-    else if (type === 'exchange') obs$ = this.service.reverseCashExchange(id, reason);
-    else obs$ = this.service.reverseInterCashierTransfer(id, reason);
-
-    obs$.pipe(catchError(() => of(null))).subscribe((res: any) => {
-      if (res?.reversed) {
-        this.snackBar.open('Transaction reversed successfully', 'Close', { duration: 3000 });
-        this.load();
-      } else {
-        this.snackBar.open('Reversal failed', 'Close', { duration: 3000 });
-      }
-    });
+  /** Who the exchange was with: the customer's name (and account, if one), else the account, else a walk-in. */
+  private exchangeParty(e: any): string {
+    if (e.customerName) {
+      return e.accountNo ? `${e.customerName} (A/C ${e.accountNo})` : e.customerName;
+    }
+    return e.accountNo ? `Account ${e.accountNo}` : 'Walk-in Customer';
   }
 
   typeLabel(type: string): string {