The spec (§29257) refers to 'PromptTextArea' implying a multi-line
TextArea widget, but TextArea.__init__() dropped the placeholder kwarg
in textual >=1.0. This implementation uses Input (single-line) as a
workaround. MULTILINE mode detection works via content inspection
but the widget cannot display multiple lines. Document this gap and
reference the spec sections for future migration.
Rebases the TUI prompt symbol fix onto the latest master, resolving
conflicts with the TextArea→Input refactor and the dollar-prefix shell
mode addition. Adds the missing CHANGELOG.md entry for #6431 and
removes the now-obsolete tui_prompt_textarea feature/steps that tested
the old TextArea-based implementation.
ISSUES CLOSED: #6431
hamza.khyari
HAL9000