WEB-263: Add Buy Down Fees tabs

src/app/loans/common-resolvers/loan-buy-down-fees-data.resolver.ts

@@ -0,0 +1,23 @@
+import { Injectable } from '@angular/core';
+import { Resolve, ActivatedRouteSnapshot } from '@angular/router';
+import { Observable } from 'rxjs';
+import { LoansService } from '../loans.service';
+
+@Injectable()
+export class LoanBuyDownFeesDataResolver implements Resolve<Object> {
+  constructor(private loansService: LoansService) {}
+
+  resolve(route: ActivatedRouteSnapshot): Observable<any> {
+    const loanId = route.paramMap.get('loanId') || route.parent.paramMap.get('loanId');
+
+    if (!loanId) {
+      console.error('LoanBuyDownFeesDataResolver: Could not find loanId in route parameters');
+      return new Observable((observer) => {
+        observer.next([]);
+        observer.complete();
+      });
+    }
+
+    return this.loansService.getBuyDownFeeData(loanId);
+  }
+}