Merge pull request #20 from ualsweb/claude/add-modal-loading-state-011V19Q8PmKCbKm6V5XEq72s

Fix loading state in PO details modal

frontend/src/components/domain/procurement/UnifiedPurchaseOrderModal.tsx

@@ -760,7 +760,7 @@ export const UnifiedPurchaseOrderModal: React.FC<UnifiedPurchaseOrderModalProps>
         }) : undefined}
         sections={sections}
         actions={buildActions()}
-        isLoading={isLoading}
+        loading={isLoading}
         size="lg"
         // Enable edit mode via standard Edit button (only for pending approval)
         onEdit={po?.status === 'pending_approval' ? () => setMode('edit') : undefined}