feat: 实现 React 页面层右键菜单数据联动

- 新增 useContextMenuData Hook 处理右键菜单数据传递
- 重构 Jwt/Base64Converter/TextStatistics/QrCode 页面接收右键数据
- RouterProvider 支持从 URL 参数解析右键菜单数据
- 添加 contextMenu/pendingData 存储键到 StorageSchema
- 添加 useContextMenuData 单元测试（12个测试用例）

pages/Jwt/index.tsx

@@ -1,4 +1,4 @@
-import { useMemo, useState } from 'react';
+import { useCallback, useMemo, useState } from 'react';
 import { Box, Container, Paper, Stack, Typography } from '@mui/material';
 import { useSnackbar } from '@/components/GlobalSnackbar';
 import VpnKeyIcon from '@mui/icons-material/VpnKey';
@@ -7,6 +7,7 @@ import { stringifyJson, parseJwt } from '@/utils/jwt';
 import CopyButton from '@/components/CopyButton';
 import TextInputArea from '@/components/TextInputArea';
 import { useLazyTranslation } from '@/utils/useLazyTranslation';
+import { useContextMenuData } from '@/utils/useContextMenuData';
 
 interface SectionProps {
   title: string;
@@ -61,6 +62,13 @@ export default function Index() {
   const { t } = useLazyTranslation('jwt');
   const [jwtInput, setJwtInput] = useState('');
 
+  const handleContextMenuData = useCallback((payload: string) => {
+    const cleaned = payload.replace(/^Bearer\s*/i, '').trim();
+    setJwtInput(cleaned);
+  }, []);
+
+  useContextMenuData({ featureKey: 'jwt', onData: handleContextMenuData });
+
   const result = useMemo(() => {
     if (!jwtInput.trim()) {
       return null;