ApiCore/ApiCore-Frontend/src/lib/auth/jwt.ts

export interface AccessTokenClaims {
  sub: string;
  email: string;
  role: string;
  exp: number;
}

export function decodeAccessToken(token: string): AccessTokenClaims | null {
  try {
    const payload = token.split('.')[1];
    const base64 = payload.replace(/-/g, '+').replace(/_/g, '/');
    const json = atob(base64);
    return JSON.parse(json) as AccessTokenClaims;
  } catch {
    return null;
  }
}