use thiserror::Error;
#[derive(Debug, Error)]
pub enum TerminalError {
#[error("session '{0}' not found")]
NotFound(String),
#[error("PTY backend error: {0}")]
Pty(String),
#[error("spawn failed: {0}")]
Spawn(String),
#[error("I/O error: {0}")]
Io(#[from] std::io::Error),
#[error("transport error: {0}")]
Transport(String),
#[error("identity gate denied: {0}")]
Denied(String),
}