style(cluster): center pool replicas cell

src/pages/cluster-management/components/pool-rows.tsx

@@ -163,7 +163,11 @@ const PoolRows: React.FC<PoolRowsProps> = ({
                   key={col.dataIndex || col.key}
                   span={spanFor(col.dataIndex)}
                   style={{
-                    color: 'var(--ant-color-text-secondary)'
+                    color: 'var(--ant-color-text-secondary)',
+                    // CellContent shrinks to its content inside the flex
+                    // cell, so its own align class can't center it —
+                    // center at the cell level instead.
+                    justifyContent: col.align
                   }}
                 >
                   <CellContent

src/pages/cluster-management/hooks/use-pools-columns.tsx

@@ -116,6 +116,7 @@ const usePoolsColumns = (
         dataIndex: 'replicas',
         span: 6,
         key: 'replicas',
+        align: 'center',
         editable: {
           valueType: 'number',
           title: intl.formatMessage({ id: 'models.table.replicas.edit' })