fix(ci): resolve all lint errors for GitHub Actions

- Remove unused SupportedLocale import in results.tsx
- Remove unused webroot variable in public/i18n.js
- Configure knip.json to ignore i18n public API exports
- Add language-selector and language-option to ESLint ignore list
- Auto-fix Prettier formatting across all files
- Fix better-tailwindcss line wrapping issues

src/helpers/env.ts

@@ -1,6 +1,5 @@
 // 預設開放註冊（開箱即用），管理者可設為 false 來關閉
-export const ACCOUNT_REGISTRATION =
-  process.env.ACCOUNT_REGISTRATION?.toLowerCase() !== "false";
+export const ACCOUNT_REGISTRATION = process.env.ACCOUNT_REGISTRATION?.toLowerCase() !== "false";
 
 export const HTTP_ALLOWED = process.env.HTTP_ALLOWED?.toLowerCase() === "true" || false;