# Validation Errors
error.validation.default=Parameter validation failed.
user.name.required=Please enter a name.
user.name.size=Name must be between {min} and {max} characters.
user.email.invalid=Please enter a valid email address.
user.description.size=Description cannot exceed {max} characters.

# Business Errors
error.biz.denied=Operation not permitted: {0}.
error.auth.unauthorized=Please log in first.
error.permission.denied=You do not have permission to access {0}.
error.resource.notfound={0} with ID {1} does not exist.
error.user.delete.admin=Cannot delete administrator user.
error.unknown=Unknown error type: {0}

# Server Errors
error.server.internal=Internal server error. Please try again later.
error.server.busy=Server is busy. Please try again later.
error.server.maintenance=System is under maintenance.

# Data Errors
error.data.duplicate=Data already exists.
error.data.invalid=Invalid data format.
error.data.notfound=Data not found.