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/checker-inbox-and-tasks/checker-inbox-and-tasks.component.html

@@ -144,15 +144,6 @@
       <fa-icon icon="hand-holding-usd" class="ac-tab__ic"></fa-icon>
       <span>Share Withdrawal Requests</span>
     </a>
-    <a
-      class="ac-tab"
-      routerLink="./share-closure-requests"
-      routerLinkActive="ac-tab--active"
-      *mifosxHasPermission="'ALL_FUNCTIONS_READ'"
-    >
-      <fa-icon icon="lock" class="ac-tab__ic"></fa-icon>
-      <span>Share Closure Requests</span>
-    </a>
     <a
       class="ac-tab"
       routerLink="./deposit-requests"