src/utils/mask-api-key.ts

export const maskApiKey = (value: string): string => {
  const trimmed = value.trim();
  if (!trimmed) {
    return "missing";
  }
  if (trimmed.length <= 6) {
    return `${trimmed.slice(0, 1)}...${trimmed.slice(-1)}`;
  }
  if (trimmed.length <= 16) {
    return `${trimmed.slice(0, 2)}...${trimmed.slice(-2)}`;
  }
  return `${trimmed.slice(0, 8)}...${trimmed.slice(-8)}`;
};