feat(bank-transfer): convert bank transfer to maker-checker approval flow

- submitBankTransfer() now calls submit() with requestType='BANK_TRANSFER'
  instead of the immediate-execution /banktransfer endpoint
- Confirm dialog updated: 'Submit for Approval' instead of 'Execute Transfer'
- disbursement-review: isBankTransferMode getter, separate DR/CR entry tables,
  'Approve Bank Transfer' button label, correct isCollectionMode guard
- Disbursement Requests checker inbox: Type badge (Bank Transfer/Collection/
  Disbursement) column, GL column shows 'Intra-bank transfer' for BT requests
- Checker inbox tab renamed to 'Disbursement & Transfers'

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

src/app/clerk/disbursement-review/disbursement-review.component.ts

@@ -91,7 +91,10 @@ export class DisbursementReviewComponent implements OnInit {
         if (res?.error) {
           this.snackBar.open(res.error, 'Close', { duration: 5000 });
         } else {
-          this.snackBar.open('Disbursement approved successfully.', 'Close', { duration: 3000 });
+          const msg = this.isBankTransferMode
+            ? 'Bank transfer approved successfully.'
+            : 'Disbursement approved successfully.';
+          this.snackBar.open(msg, 'Close', { duration: 3000 });
           this.router.navigate(['/checker-inbox-and-tasks/disbursement-requests']);
         }
       });
@@ -114,7 +117,12 @@ export class DisbursementReviewComponent implements OnInit {
       });
   }
 
+  get isBankTransferMode(): boolean {
+    return this.request?.request_type === 'BANK_TRANSFER';
+  }
+
   get isCollectionMode(): boolean {
+    if (this.isBankTransferMode) return false;
     return this.creditEntries.some((e) => e.dbCr === 'Dr');
   }
 
@@ -131,6 +139,10 @@ export class DisbursementReviewComponent implements OnInit {
     return entries.reduce((sum, e) => sum + (e.amount ?? 0), 0);
   }
 
+  totalDebitAmount(): number {
+    return this.drEntries.reduce((sum, e) => sum + (e.amount ?? 0), 0);
+  }
+
   statusClass(status: string): string {
     const map: Record<string, string> = {
       PENDING: 'dri-status--pending',