feat(chequebook): add cheque book module with Maker-Checker workflow

Adds cheque series creation, stock receive, cheque leaf request/lookup,
and stop-payment/lost-reporting flows with Maker-Checker approval and
a checker-inbox tab for pending chequebook requests.

src/app/chequebook/leaf-lookup/leaf-lookup.component.ts

@@ -0,0 +1,81 @@
+/**
+ * Copyright since 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/** Angular Imports */
+import { Component, inject } from '@angular/core';
+import { UntypedFormBuilder, UntypedFormGroup, Validators } from '@angular/forms';
+import { MatIconModule } from '@angular/material/icon';
+import { MatButtonModule } from '@angular/material/button';
+import { MatSnackBar, MatSnackBarModule } from '@angular/material/snack-bar';
+import { FaIconComponent } from '@fortawesome/angular-fontawesome';
+import { STANDALONE_SHARED_IMPORTS } from 'app/standalone-shared.module';
+
+/** Custom Services */
+import { ChequeBookService } from '../chequebook.service';
+
+/**
+ * The teller/counter quick-lookup: given a bare cheque-leaf serial number, is it active, stopped, lost, or
+ * was it ever issued at all — one code path covers every case (issued or unissued-but-stolen stock).
+ */
+@Component({
+  selector: 'mifosx-leaf-lookup',
+  templateUrl: './leaf-lookup.component.html',
+  styleUrls: ['./leaf-lookup.component.scss'],
+  imports: [
+    ...STANDALONE_SHARED_IMPORTS,
+    MatIconModule,
+    MatButtonModule,
+    MatSnackBarModule,
+    FaIconComponent
+  ]
+})
+export class LeafLookupComponent {
+  private formBuilder = inject(UntypedFormBuilder);
+  private chequeBookService = inject(ChequeBookService);
+  private snackBar = inject(MatSnackBar);
+
+  private notify(message: string, isError = false): void {
+    this.snackBar.open(message, 'Dismiss', { duration: isError ? 6000 : 3000 });
+  }
+
+  searchForm: UntypedFormGroup;
+  // a bare serial number is only unique within its own series — more than one series can share a number,
+  // so the lookup can legitimately return more than one match
+  results: any[] = [];
+  searched = false;
+  busy = false;
+
+  constructor() {
+    this.searchForm = this.formBuilder.group({
+      serialNo: [
+        '',
+        Validators.required
+      ]
+    });
+  }
+
+  search(): void {
+    if (this.searchForm.invalid || this.busy) {
+      return;
+    }
+    this.busy = true;
+    this.searched = true;
+    this.results = [];
+    this.chequeBookService.lookupLeaf(this.searchForm.value.serialNo).subscribe({
+      next: (data: any) => {
+        this.busy = false;
+        this.results = Array.isArray(data) ? data : [data];
+      },
+      error: () => {
+        this.busy = false;
+        this.results = [];
+        this.notify('No cheque leaf found with that serial number', true);
+      }
+    });
+  }
+}