export function generateUUID(): string { if ( typeof crypto !== "undefined" && typeof crypto.randomUUID === "function" ) { return crypto.randomUUID(); } const bytes = new Uint8Array(16); crypto.getRandomValues(bytes); bytes[6] = (bytes[6] & 0x0f) | 0x40; bytes[8] = (bytes[8] & 0x3f) | 0x80; const hex = [...bytes].map((b) => b.toString(16).padStart(2, "0")); return ( hex.slice(0, 4).join("") + "-" + hex.slice(4, 6).join("") + "-" + hex.slice(6, 8).join("") + "-" + hex.slice(8, 10).join("") + "-" + hex.slice(10, 16).join("") ); }