/**
 * 部分模型会把 UTF-8 汉字输出成 <0xE5><0xA7><0xA4> 形式，还原为正常文字。
 * 例：<0xE5><0xA7><0xA4> → 姤
 */
export function decodeHexByteEscapes(text: string): string {
  return text.replace(/(?:<0x[0-9A-Fa-f]{2}>)+/gi, (match) => {
    const parts = match.match(/<0x([0-9A-Fa-f]{2})>/gi);
    if (!parts?.length) {
      return match;
    }
    const bytes = Uint8Array.from(
      parts.map((part) => parseInt(part.slice(3, 5), 16)),
    );
    try {
      return new TextDecoder("utf-8", { fatal: true }).decode(bytes);
    } catch {
      return new TextDecoder("utf-8", { fatal: false }).decode(bytes);
    }
  });
}