refactor(timestamp): migrate pageTheme constants to Timestamp feature

Remove config/pageTheme.ts and move DATE_FORMAT, ZONES, UnitType, ZoneType
to pages/Timestamp/constants.ts for better feature cohesion.

pages/Timestamp/LiveClock.tsx

@@ -2,7 +2,7 @@ import React, { useCallback, useEffect, useRef, useState } from 'react';
 import { Clock } from 'lucide-react';
 import CopyButton from '@/components/CopyButton';
 import { useSnackbar } from '@/components/GlobalSnackbar';
-import type { UnitType } from '@/config/pageTheme';
+import type { UnitType } from './constants';
 import { useLazyTranslation } from '@/utils/useLazyTranslation';
 import { cn } from '@/lib/utils'; // 引入标准的 shadcn 工具函数
 

pages/Timestamp/ResultView.tsx

@@ -1,8 +1,8 @@
 import React, { useMemo } from 'react';
 import dayjs from '@/utils/dayjs';
 import CopyButton from '@/components/CopyButton';
-import type { UnitType } from '@/config/pageTheme';
-import { DATE_FORMAT } from '@/config/pageTheme'; // 彻底移除了非语义的 timestampPageStyles 依赖
+import type { UnitType } from './constants';
+import { DATE_FORMAT } from './constants';
 import { useLazyTranslation } from '@/utils/useLazyTranslation';
 import { cn } from '@/lib/utils'; // shadcn 核心类名合并工具
 

pages/Timestamp/constants.ts

@@ -0,0 +1,6 @@
+export const DATE_FORMAT = 'YYYY/MM/DD HH:mm:ss';
+
+export const ZONES = ['Asia/Shanghai', 'America/New_York', 'Europe/London'] as const;
+
+export type UnitType = 'ms' | 's';
+export type ZoneType = (typeof ZONES)[number];

pages/Timestamp/index.tsx

@@ -1,7 +1,7 @@
 import { Clock } from 'lucide-react';
 import PageHeader from '@/components/PageHeader';
 import SwitchButtonGroup from '@/components/SwitchButtonGroup';
-import { ZONES } from '@/config/pageTheme';
+import { ZONES } from './constants';
 import LiveClock from './LiveClock';
 import ResultView from './ResultView';
 import { useTimestampConverter } from './useTimestampConverter';

pages/Timestamp/useTimestampConverter.ts

@@ -1,7 +1,7 @@
 import { useCallback, useMemo, useState } from 'react';
 import dayjs from '@/utils/dayjs';
-import type { UnitType, ZoneType } from '@/config/pageTheme';
-import { DATE_FORMAT } from '@/config/pageTheme';
+import type { UnitType, ZoneType } from './constants';
+import { DATE_FORMAT } from './constants';
 import { useLazyTranslation } from '@/utils/useLazyTranslation';
 import { useContextMenuData } from '@/utils/useContextMenuData';