feat(shares): close share account directly on withdrawal approval; drop separate closure-request flow

Replaces the auto-submit-closure-request behavior with an immediate
account close, in the same approval action, when a withdrawal brings
shares to zero — matching the backend's new single-step close-on-
approval flow. Removes the now-unneeded Share Closure Request feature
entirely: dedicated create/list components (Clerk Dashboard + Approval
Center), routes, nav links, and the "eligible for closure" banner on
the Share Account view.

Also adds a clear "this will close the account" notice wherever a
withdrawal would zero out the account's shares — the standalone Share
Withdrawal Request page (submit + review) and Transaction Entry's
Share Redemption Transfer confirm dialog — styled as an amber warning
callout rather than a plain info line. Trims that confirm dialog to
just the required details (dropped the redundant ECS A/C No. line and
the validation-checklist block) and compacts its overall size.

src/app/tasks/tasks-routing.module.ts

@@ -18,7 +18,6 @@ import { CheckerInboxAndTasksComponent } from './checker-inbox-and-tasks/checker
 import { CheckerInboxComponent } from './checker-inbox-and-tasks-tabs/checker-inbox/checker-inbox.component';
 import { WithdrawalRequestsComponent } from './checker-inbox-and-tasks-tabs/withdrawal-requests/withdrawal-requests.component';
 import { ShareWithdrawalRequestsComponent } from './checker-inbox-and-tasks-tabs/share-withdrawal-requests/share-withdrawal-requests.component';
-import { ShareClosureRequestsComponent } from './checker-inbox-and-tasks-tabs/share-closure-requests/share-closure-requests.component';
 import { DepositRequestsComponent } from './checker-inbox-and-tasks-tabs/deposit-requests/deposit-requests.component';
 import { DisbursementRequestsComponent } from './checker-inbox-and-tasks-tabs/disbursement-requests/disbursement-requests.component';
 import { ClientApprovalComponent } from './checker-inbox-and-tasks-tabs/client-approval/client-approval.component';
@@ -166,11 +165,6 @@ const routes: Routes = [
           component: ShareWithdrawalRequestsComponent,
           data: { title: 'Share Withdrawal Requests' }
         },
-        {
-          path: 'share-closure-requests',
-          component: ShareClosureRequestsComponent,
-          data: { title: 'Share Closure Requests' }
-        },
         {
           path: 'deposit-requests',
           component: DepositRequestsComponent,
@@ -225,19 +219,6 @@ const routes: Routes = [
         }
       ]
     },
-    {
-      path: 'checker-inbox-and-tasks/share-closure-requests',
-      children: [
-        {
-          path: ':id/review',
-          loadComponent: () =>
-            import('../clerk/share-closure-request/share-closure-request.component').then(
-              (m) => m.ShareClosureRequestComponent
-            ),
-          data: { title: 'Review Share Closure Request', breadcrumb: 'Review Share Closure', mode: 'review' }
-        }
-      ]
-    },
     {
       path: 'checker-inbox-and-tasks/disbursement-requests',
       children: [