## What changed
Add `terminal_name` and `multiplexer` attributes to `codex.tui.start` alongside `app_server_mode`. Use fixed terminal categories rather than versioned or user-provided identifiers, with `unknown` for unrecognized terminals. Report the multiplexer as `tmux`, `zellij`, or `none`.
## Testing
Extend the CLI worktree test to parse metric payloads and assert the exact startup attributes for an unrecognized terminal without a multiplexer. Keep coverage that no metrics are sent when analytics is disabled.
GitOrigin-RevId: 024c82653098b9bddd6c5e8d7133ff798b58dcd1