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.