Method mapKeyCode

lib/input-handler.ts:256–258

* Map KeyboardEvent.code to USB HID Key enum value * @param code - KeyboardEvent.code value * @returns Key enum value or null if unmapped

(code: string)

   * @returns Key enum value or null if unmapped
   */
  private mapKeyCode(code: string): Key | null {
    return KEY_MAP[code] ?? null;
  }

  /**
   * Extract modifier flags from KeyboardEvent