feat(clerk): add clerk-facing Cheque Book screen and shell nav wiring

Adds a customer-account-scoped Cheque Book view under Clerk > Account
Facilities (list + leaf detail, with stop-payment/report-lost/mark-used/
return actions), reachable via a new hover dropdown on the Account
Facilities nav item. Also refreshes the Account Facilities page layout,
and carries over a few chequebook service/detail-dialog fixes from the
back-office module (used-leaf display, leaf-lookup dialog polish).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

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

@@ -53,7 +53,9 @@
                     ? 'warn'
                     : result.status === 'LOST'
                       ? 'bad'
-                      : 'neutral'
+                      : result.status === 'RETURNED'
+                        ? 'returned'
+                        : 'neutral'
             "
             >{{ result.status }}</span
           >
@@ -117,6 +119,12 @@
               ><span>{{ result.usedReason }}</span>
             </div>
           }
+          @if (result.status === 'RETURNED') {
+            <div>
+              <span class="k">{{ 'labels.inputs.Return Reason' | translate }}</span
+              ><span>{{ result.returnReason }}</span>
+            </div>
+          }
         </div>
       </mat-card-content>
     </mat-card>