feat(cashier): add morning transfer & previous-day settlement hard block

- validateCashierHasMorningTransfer() blocks deposits & withdrawals when no today's cash transfer received
- validatePreviousDayClosed() blocks all transactions when previous day unsettled
- morningTransferReceived field added to cashier-day-status API response
- Warning banners shown in Savings, Current, FD, RD transaction forms
- Submit button disabled when either condition is active
- getCashierTotalCash SQL fixed: dm.denomination_value -> dm.denomination

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

src/app/cashier/cashier.service.ts

@@ -125,6 +125,9 @@ export class CashierService {
     if (asOfDate) params = params.set('asOfDate', asOfDate);
     return this.http.get('/cashreports/cashier-position/me', { params });
   }
+  getCashierDayStatus(): Observable<any> {
+    return this.http.get('/cashreports/cashier-day-status');
+  }
 
   checkSettlement(cashierId: number, date: string): Observable<any> {
     const params = new HttpParams().set('cashierId', String(cashierId)).set('date', date);