feat(i18n): add multi-language UI support with 5 languages

- Add i18n framework with locale detection and cookie persistence
- Support English, Traditional Chinese (zh-TW), Simplified Chinese (zh-CN), Japanese (ja), Korean (ko)
- Add LanguageSelector component in navigation header
- Create locale JSON files with full translations
- Update all page components (root, user, results, history) with i18n support
- Add client-side translation helpers for dynamic content
- Auto-detect user's preferred language from browser settings
- Bump version to v0.1.3

bun.lock

@@ -9,6 +9,7 @@
         "@elysiajs/jwt": "^1.4.0",
         "@elysiajs/static": "^1.4.6",
         "@kitajs/html": "^4.2.11",
+        "@sinclair/typebox": "^0.34.47",
         "elysia": "^1.4.16",
         "sanitize-filename": "^1.6.3",
         "tar": "^7.5.2",