Accessible mode

How Huh v2.0.3 decides on accessible mode, and where it behaves differently from the TUI.

form.WithAccessible(true) swaps the TUI for plain line based prompts that screen readers handle.

Turning it on without losing the default

NewForm switches accessible mode on when TERM is dumb, and any later WithAccessible call replaces that decision. So WithAccessible(os.Getenv("ACCESSIBLE") != "") turns it back off on a dumb terminal whenever the variable is unset. Honor the common ACCESSIBLE convention without losing the default by only calling WithAccessible when the variable is present, as the theme example does with os.LookupEnv.

Differences from the TUI

• Accessible prompts default to stdout, while the TUI renders to stderr. Use WithOutput(os.Stderr) to keep stdout for results in both modes.
• Timeouts are not supported (ErrTimeoutUnsupported).
• The accessible path does not use the context passed to RunWithContext and does not skip hidden groups. Check accessible behavior separately when using conditional pages.
• Run discards field errors and returns nil: on EOF a prompt keeps its default value and skips validation, and ErrUserAborted is never returned. Validate the bound values after Run.

The spinner has its own WithAccessible, mirroring the form.