DG9 统一全站 UI 布局样板迁移

关联 Issue: DG9-0..DG9-12

client/src/pages/MobileReimbursementDetailPage.tsx

@@ -1173,7 +1173,7 @@ export function MobileReimbursementDetailPage() {
           className="mobile-sticky-action-surface fixed inset-x-0 bottom-0 z-50 border-t border-zinc-200 bg-white/95 shadow-[0_-10px_24px_rgba(15,23,42,0.10)] backdrop-blur"
           data-testid="mobile-reimbursement-sticky-actions"
         >
-          <div className={cn(canOpenInvoiceDialog && showSubmitAction ? "mobile-two-action-grid" : "grid grid-cols-1 gap-2")}>
+          <div className="mobile-sticky-action-grid">
             {canOpenInvoiceDialog ? (
               <Button
                 className="min-h-11 min-w-0 px-2 text-sm whitespace-nowrap"