Reviewer caught that the round-1 parser in #18994 rejected every
multi-character token, so a config value like ``ctrl+space`` (which the
CLI happily binds via prompt_toolkit's ``c-space`` rewrite in
``cli.py``) silently fell back to the documented Ctrl+B default —
re-introducing the same false-shortcut bug the PR was meant to fix,
just at a different surface.
Add explicit named-key support that mirrors what the CLI accepts:
* ``space`` (alias: ``spc``) → matches ``ch === ' '``
* ``enter`` (alias: ``return``, ``ret``) → matches ``key.return``
* ``tab`` → matches ``key.tab``
* ``escape`` (alias: ``esc``) → matches ``key.escape``
* ``backspace`` (alias: ``bs``) → matches ``key.backspace``
* ``delete`` (alias: ``del``) → matches ``key.delete``
``ParsedVoiceRecordKey`` gains an optional ``named`` field; ``ch``
holds either a single char (back-compat) or the canonical named token,
and the runtime matcher dispatches on ``named`` before checking the
modifier shape. Aliases collapse to one canonical name so
``ctrl+esc`` and ``ctrl+escape`` behave identically.
Unrecognised multi-character tokens (e.g. ``ctrl+spcae`` typo, or
unsupported keys like ``ctrl+f5``) still fall back to the Ctrl+B
default rather than silently disabling the binding — keeps the "typo
never silently kills the shortcut" guarantee.
Tests:
* ``parseVoiceRecordKey`` parametrised over every named token + each
alias variant.
* New ``isVoiceToggleKey`` cases for space (ch-based match), enter
(``key.return``), tab, escape, backspace, delete, including
modifier-mismatch negatives.
* ``formatVoiceRecordKey`` renders named keys in title case
(``Ctrl+Space``, ``Ctrl+Enter``).
* Existing fall-back-to-Ctrl+B contract preserved for empty input
AND unrecognised multi-char tokens.
Full TUI suite: 559/559 pass; ``tsc --noEmit`` clean.
Refs #18994 (round-1 review feedback)
Co-authored-by: asheriif <ahmedsherif95@gmail.com>
