refactor(pages): apply UI+Hook separation and unify component naming

- Dashboard, RightClickRestorer: rename page component to Index
- Jwt: extract useJwt.ts hook + JwtSection.tsx sub-component (127→76 lines)
- TextStatistics: extract useTextStatistics.ts hook (63→48 lines)
- JsonTools: extract useJsonTools.ts hook + constants.ts (199→109 lines)
- All pages now follow CODING_STANDARDS.md §11 pattern

src/pages/RightClickRestorer/index.tsx

@@ -5,7 +5,7 @@ import { Shield, ShieldCheck, MousePointerClick, AlertTriangle } from 'lucide-re
 import { useRightClickRestorer } from './useRightClickRestorer';
 import { useI18n } from '@/utils/chromeI18n';
 
-export default function RightClickRestorerPage() {
+export default function Index() {
   const { t } = useI18n('rightClickRestorer');
   const { domain, isLoading, isUnlocked, isUnsupported, unlock } = useRightClickRestorer();