fix(table): smooth list empty/loading transitions, no layout jump on entry

Reserve a stable block for the empty/loading state (matching the NoResult
height) and fade the empty state in, so entering a list page no longer jumps
between spinner, empty result, and rows. Apply scroll-table to the antd main
lists and pass emptyMinHeight to the SealTable-based lists.

src/pages/cluster-management/clusters.tsx

@@ -395,6 +395,7 @@ const Clusters: React.FC = () => {
         >
           <SealTable
             rowKey="id"
+            emptyMinHeight="calc(100vh - 300px)"
             loadChildren={getWorkerPoolList}
             sortDirections={TABLE_SORT_DIRECTIONS}
             expandedRowKeys={expandedRowKeys}