feat(client): add Pagination component and integrate with Table and pages

- add Pagination component with prev/next, ellipsis page range, and optional page-size selector
- add Pagination and Table pagination stories (WithPagination, WithPaginationAndSizeSelector)
- extend Table with optional pageSize and pageSizeOptions props for built-in client-side pagination
- add Timestamp column to Table story fixtures
- enable pagination on all four pages with pageSize=10 and size selector
- add pagination i18n keys to en.json

client/.storybook/stories/Pagination.stories.tsx

@@ -0,0 +1,56 @@
+import type { Meta, StoryObj } from '@storybook/react-vite';
+import { useState } from 'react';
+import { Pagination } from '../../src/ui/Pagination/Pagination';
+
+const meta: Meta<typeof Pagination> = {
+  title: 'UI/Pagination',
+  component: Pagination,
+  parameters: { layout: 'padded' },
+  tags: ['autodocs'],
+};
+export default meta;
+type Story = StoryObj<typeof Pagination>;
+
+function Controlled(args: React.ComponentProps<typeof Pagination>) {
+  const [page, setPage] = useState(args.page);
+  const [pageSize, setPageSize] = useState(args.pageSize);
+  return (
+    <Pagination
+      {...args}
+      page={page}
+      pageSize={pageSize}
+      onPageChange={setPage}
+      onPageSizeChange={args.onPageSizeChange ? setPageSize : undefined}
+    />
+  );
+}
+
+export const FewPages: Story = {
+  render: (args) => <Controlled {...args} />,
+  args: { page: 1, pageSize: 10, total: 30 },
+};
+
+export const ManyPages: Story = {
+  render: (args) => <Controlled {...args} />,
+  args: { page: 5, pageSize: 10, total: 200 },
+};
+
+export const LastPage: Story = {
+  render: (args) => <Controlled {...args} />,
+  args: { page: 20, pageSize: 10, total: 200 },
+};
+
+export const SinglePage: Story = {
+  render: (args) => <Controlled {...args} />,
+  args: { page: 1, pageSize: 10, total: 7 },
+};
+
+export const WithPageSizeSelector: Story = {
+  render: (args) => <Controlled {...args} />,
+  args: {
+    page: 1,
+    pageSize: 10,
+    total: 150,
+    onPageSizeChange: () => {},
+  },
+};

client/.storybook/stories/Table.stories.tsx

@@ -1,6 +1,7 @@
 import type { Meta, StoryObj } from '@storybook/react-vite';
 import { Table } from '../../src/ui/Table/Table';
 import { Badge } from '../../src/ui/Badge/Badge';
+import { Timestamp } from '../../src/ui/Timestamp/Timestamp';
 
 const meta: Meta<typeof Table> = {
   title: 'UI/Table',
@@ -15,53 +16,74 @@ interface User {
   name: string;
   email: string;
   status: 'active' | 'inactive';
+  updatedAt: string;
 }
 
+const daysAgo = (n: number) => new Date(Date.now() - n * 86_400_000).toISOString();
+
 const users: User[] = [
-  { id: 1, name: 'Alice Müller', email: 'alice@example.com', status: 'active' },
-  { id: 2, name: 'Bob Nguyen', email: 'bob@example.com', status: 'inactive' },
-  { id: 3, name: 'Carol Santos', email: 'carol@example.com', status: 'active' },
+  { id: 1, name: 'Alice Müller', email: 'alice@example.com', status: 'active', updatedAt: daysAgo(1) },
+  { id: 2, name: 'Bob Nguyen', email: 'bob@example.com', status: 'inactive', updatedAt: daysAgo(5) },
+  { id: 3, name: 'Carol Santos', email: 'carol@example.com', status: 'active', updatedAt: daysAgo(30) },
 ];
 
+const manyUsers: User[] = Array.from({ length: 47 }, (_, i) => ({
+  id: i + 1,
+  name: `User ${i + 1}`,
+  email: `user${i + 1}@example.com`,
+  status: i % 3 === 0 ? 'inactive' : 'active',
+  updatedAt: daysAgo(i),
+}));
+
+const columns: StoryObj<typeof Table<User>>['args'] = {
+  rowKey: (u: User) => u.id,
+  emptyMessage: 'No users found.',
+  columns: [
+    { key: 'id', header: 'ID', render: (u: User) => u.id, width: 60 },
+    { key: 'name', header: 'Name', render: (u: User) => u.name },
+    { key: 'email', header: 'Email', render: (u: User) => u.email },
+    {
+      key: 'status',
+      header: 'Status',
+      width: 110,
+      render: (u: User) => (
+        <Badge variant={u.status === 'active' ? 'success' : 'neutral'}>{u.status}</Badge>
+      ),
+    },
+    {
+      key: 'updated',
+      header: 'Updated',
+      width: 140,
+      render: (u: User) => <Timestamp value={u.updatedAt} />,
+    },
+  ],
+};
+
 export const Default: StoryObj<typeof Table<User>> = {
-  args: {
-    data: users,
-    rowKey: (u) => u.id,
-    emptyMessage: 'No users found.',
-    columns: [
-      { key: 'id', header: 'ID', render: (u) => u.id, width: 60 },
-      { key: 'name', header: 'Name', render: (u) => u.name },
-      { key: 'email', header: 'Email', render: (u) => u.email },
-      {
-        key: 'status',
-        header: 'Status',
-        width: 110,
-        render: (u) => (
-          <Badge variant={u.status === 'active' ? 'success' : 'neutral'}>{u.status}</Badge>
-        ),
-      },
-    ],
-  },
+  args: { ...columns, data: users },
 };
 
 export const Loading: StoryObj<typeof Table<User>> = {
-  args: {
-    ...Default.args,
-    loading: true,
-  },
+  args: { ...columns, data: users, loading: true },
 };
 
 export const Empty: StoryObj<typeof Table<User>> = {
-  args: {
-    ...Default.args,
-    data: [],
-    emptyMessage: 'No users found.',
-  },
+  args: { ...columns, data: [] },
 };
 
 export const SingleRow: StoryObj<typeof Table<User>> = {
+  args: { ...columns, data: [users[0]] },
+};
+
+export const WithPagination: StoryObj<typeof Table<User>> = {
+  args: { ...columns, data: manyUsers, pageSize: 10 },
+};
+
+export const WithPaginationAndSizeSelector: StoryObj<typeof Table<User>> = {
   args: {
-    ...Default.args,
-    data: [users[0]],
+    ...columns,
+    data: manyUsers,
+    pageSize: 10,
+    pageSizeOptions: [10, 25, 50],
   },
 };

client/src/i18n/locales/en.json

@@ -41,5 +41,12 @@
     "switch_to_dark": "Switch to dark theme",
     "light_mode": "Light mode",
     "dark_mode": "Dark mode"
+  },
+  "pagination": {
+    "prev": "Previous page",
+    "next": "Next page",
+    "range": "{{from}}–{{to}} of {{total}}",
+    "per_page": "{{count}} per page",
+    "page_size": "Items per page"
   }
 }

client/src/pages/EnvironmentsPage.tsx

@@ -49,6 +49,8 @@ export function EnvironmentsPage() {
         rowKey={(e) => e.id}
         loading={loading}
         emptyMessage={t('environments.empty')}
+        pageSize={10}
+        pageSizeOptions={[10, 25, 50]}
       />
     </div>
   );

client/src/pages/KeysPage.tsx

@@ -36,6 +36,8 @@ export function KeysPage() {
         rowKey={(k) => k.name}
         loading={loading}
         emptyMessage={t('keys.empty')}
+        pageSize={10}
+        pageSizeOptions={[10, 25, 50]}
       />
     </div>
   );

client/src/pages/ScenariosPage.tsx

@@ -70,6 +70,8 @@ export function ScenariosPage() {
         rowKey={(s) => s.id}
         loading={loading}
         emptyMessage={t('scenarios.empty')}
+        pageSize={10}
+        pageSizeOptions={[10, 25, 50]}
       />
     </div>
   );

client/src/pages/SessionsPage.tsx

@@ -69,6 +69,8 @@ export function SessionsPage() {
         rowKey={(s) => s.id}
         loading={loading}
         emptyMessage={t('sessions.empty')}
+        pageSize={10}
+        pageSizeOptions={[10, 25, 50]}
       />
     </div>
   );

client/src/ui/Pagination/Pagination.module.css

@@ -0,0 +1,88 @@
+.root {
+  display: flex;
+  align-items: center;
+  gap: var(--space-3);
+  padding: var(--space-2) var(--space-4);
+  border-top: var(--border-width) solid var(--color-border);
+  font-size: var(--font-size-xs);
+  color: var(--color-text-muted);
+  flex-wrap: wrap;
+}
+
+.info {
+  flex: 1;
+  white-space: nowrap;
+}
+
+.pages {
+  display: flex;
+  align-items: center;
+  gap: var(--space-1);
+}
+
+.pageBtn,
+.arrow {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  min-width: 28px;
+  height: 28px;
+  padding: 0 var(--space-1);
+  border: var(--border-width) solid transparent;
+  border-radius: var(--radius-sm);
+  background: transparent;
+  color: var(--color-text);
+  font-size: var(--font-size-xs);
+  font-family: var(--font-family);
+  cursor: pointer;
+  transition: background var(--transition), border-color var(--transition), color var(--transition);
+  line-height: 1;
+}
+
+.pageBtn:hover:not(:disabled),
+.arrow:hover:not(:disabled) {
+  background: var(--color-bg);
+  border-color: var(--color-border);
+}
+
+.pageBtn.active {
+  background: var(--color-primary);
+  color: var(--color-primary-fg);
+  border-color: var(--color-primary);
+  font-weight: 700;
+  cursor: default;
+}
+
+.arrow:disabled {
+  opacity: 0.35;
+  cursor: not-allowed;
+}
+
+.ellipsis {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  min-width: 24px;
+  height: 28px;
+  color: var(--color-text-muted);
+  font-size: var(--font-size-xs);
+  user-select: none;
+}
+
+.sizeSelect {
+  height: 28px;
+  padding: 0 var(--space-2);
+  border: var(--border-width) solid var(--color-border);
+  border-radius: var(--radius-sm);
+  background: var(--color-bg-subtle);
+  color: var(--color-text);
+  font-size: var(--font-size-xs);
+  font-family: var(--font-family);
+  cursor: pointer;
+  outline: none;
+  transition: border-color var(--transition);
+}
+
+.sizeSelect:focus {
+  border-color: var(--color-primary);
+}

client/src/ui/Pagination/Pagination.tsx

@@ -0,0 +1,105 @@
+import { ChevronLeft, ChevronRight } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
+import styles from './Pagination.module.css';
+
+export interface PaginationProps {
+  /** 1-indexed current page */
+  page: number;
+  pageSize: number;
+  total: number;
+  onPageChange: (page: number) => void;
+  onPageSizeChange?: (size: number) => void;
+  pageSizeOptions?: number[];
+}
+
+function buildPages(current: number, last: number): (number | '…')[] {
+  if (last <= 7) return Array.from({ length: last }, (_, i) => i + 1);
+
+  const pages: (number | '…')[] = [1];
+
+  if (current > 3) pages.push('…');
+
+  const start = Math.max(2, current - 1);
+  const end = Math.min(last - 1, current + 1);
+  for (let i = start; i <= end; i++) pages.push(i);
+
+  if (current < last - 2) pages.push('…');
+
+  pages.push(last);
+  return pages;
+}
+
+export function Pagination({
+  page,
+  pageSize,
+  total,
+  onPageChange,
+  onPageSizeChange,
+  pageSizeOptions = [10, 25, 50],
+}: PaginationProps) {
+  const { t } = useTranslation();
+  const lastPage = Math.max(1, Math.ceil(total / pageSize));
+  const from = Math.min(total, (page - 1) * pageSize + 1);
+  const to = Math.min(total, page * pageSize);
+
+  return (
+    <div className={styles.root}>
+      <span className={styles.info}>{t('pagination.range', { from, to, total })}</span>
+
+      <div className={styles.pages}>
+        <button
+          className={styles.arrow}
+          onClick={() => onPageChange(page - 1)}
+          disabled={page <= 1}
+          aria-label={t('pagination.prev')}
+        >
+          <ChevronLeft size={14} />
+        </button>
+
+        {buildPages(page, lastPage).map((p, i) =>
+          p === '…' ? (
+            <span key={`ellipsis-${i}`} className={styles.ellipsis}>
+              …
+            </span>
+          ) : (
+            <button
+              key={p}
+              className={`${styles.pageBtn} ${p === page ? styles.active : ''}`}
+              onClick={() => onPageChange(p)}
+              aria-current={p === page ? 'page' : undefined}
+            >
+              {p}
+            </button>
+          ),
+        )}
+
+        <button
+          className={styles.arrow}
+          onClick={() => onPageChange(page + 1)}
+          disabled={page >= lastPage}
+          aria-label={t('pagination.next')}
+        >
+          <ChevronRight size={14} />
+        </button>
+      </div>
+
+      {onPageSizeChange && (
+        <select
+          className={styles.sizeSelect}
+          value={pageSize}
+          onChange={(e) => {
+            onPageSizeChange(Number(e.target.value));
+            onPageChange(1);
+          }}
+          aria-label={t('pagination.page_size')}
+        >
+          {pageSizeOptions.map((s) => (
+            <option key={s} value={s}>
+              {t('pagination.per_page', { count: s })}
+            </option>
+          ))}
+        </select>
+      )}
+    </div>
+  );
+}

client/src/ui/Table/Table.tsx

@@ -1,4 +1,5 @@
-import type { ReactNode } from 'react';
+import { useState, type ReactNode } from 'react';
+import { Pagination } from '../Pagination/Pagination';
 import styles from './Table.module.css';
 
 export interface TableColumn<T> {
@@ -16,6 +17,10 @@ export interface TableProps<T> {
   loading?: boolean;
   emptyMessage?: string;
   className?: string;
+  /** Enable built-in client-side pagination with this default page size */
+  pageSize?: number;
+  /** Offer a page-size selector when pagination is enabled */
+  pageSizeOptions?: number[];
 }
 
 export function Table<T>({
@@ -25,7 +30,19 @@ export function Table<T>({
   loading = false,
   emptyMessage = 'No data.',
   className,
+  pageSize: defaultPageSize,
+  pageSizeOptions,
 }: TableProps<T>) {
+  const [page, setPage] = useState(1);
+  const [pageSize, setPageSize] = useState(defaultPageSize ?? 0);
+
+  const paginated = defaultPageSize !== undefined && !loading;
+  const visibleData = paginated ? data.slice((page - 1) * pageSize, page * pageSize) : data;
+
+  // Reset to page 1 when data changes and current page would be empty
+  const lastPage = pageSize > 0 ? Math.ceil(data.length / pageSize) : 1;
+  const safePage = Math.min(page, Math.max(1, lastPage));
+
   return (
     <div className={`${styles.wrapper} ${className ?? ''}`}>
       <table className={styles.table}>
@@ -52,14 +69,14 @@ export function Table<T>({
                 Loading…
               </td>
             </tr>
-          ) : data.length === 0 ? (
+          ) : visibleData.length === 0 ? (
             <tr>
               <td colSpan={columns.length} className={styles.empty}>
                 {emptyMessage}
               </td>
             </tr>
           ) : (
-            data.map((row) => (
+            visibleData.map((row) => (
               <tr key={rowKey(row)} className={styles.tr}>
                 {columns.map((col) => (
                   <td
@@ -75,6 +92,23 @@ export function Table<T>({
           )}
         </tbody>
       </table>
+      {paginated && data.length > 0 && (
+        <Pagination
+          page={safePage}
+          pageSize={pageSize}
+          total={data.length}
+          onPageChange={setPage}
+          onPageSizeChange={
+            pageSizeOptions
+              ? (size) => {
+                  setPageSize(size);
+                  setPage(1);
+                }
+              : undefined
+          }
+          pageSizeOptions={pageSizeOptions}
+        />
+      )}
     </div>
   );
 }

client/src/ui/index.ts

@@ -24,5 +24,8 @@ export { ThemeSwitcher } from './ThemeSwitcher/ThemeSwitcher';
 export { Timestamp } from './Timestamp/Timestamp';
 export type { TimestampProps } from './Timestamp/Timestamp';
 
+export { Pagination } from './Pagination/Pagination';
+export type { PaginationProps } from './Pagination/Pagination';
+
 export { Table } from './Table/Table';
 export type { TableProps, TableColumn } from './Table/Table';