{
  "auth": {
    "required": "Please sign in first",
    "forbidden": "Access denied",
    "sessionExpired": "Session expired, please sign in again"
  },
  "network": {
    "requestFailed": "Request failed, please try again later",
    "timeout": "Request timed out",
    "serverError": "Server error"
  },
  "validation": {
    "required": "This field is required",
    "invalidFormat": "Invalid format",
    "tooShort": "Too short",
    "tooLong": "Too long"
  },
  "db": {
    "notFound": "Record not found",
    "duplicate": "Record already exists",
    "constraintViolation": "Data constraint violation"
  }
}