Classic CLI loaded ``voice.record_key`` from config.yaml and bound the
prompt-toolkit handler dynamically (``cli.py`` paths). The new TUI hard-
coded ``Ctrl+B`` everywhere — ``isVoiceToggleKey`` (input handler),
``/voice status`` ("Record key: Ctrl+B"), and ``/voice on`` ("Ctrl+B to
start/stop recording"). A user who set ``voice.record_key: ctrl+o``
(or any other key) saw the documented config silently ignored — only
Ctrl+B worked, the displayed shortcut lied about it.
Wire the configured key end to end through the existing channels:
* **Backend** (``tui_gateway/server.py``): ``voice.toggle`` action=status
AND action=on/off responses now include ``record_key``, sourced from
``config.get('voice', {}).get('record_key', 'ctrl+b')``.
* **Backend types** (``ui-tui/src/gatewayTypes.ts``): ``ConfigFullResponse``
now exposes ``config.voice.record_key`` and ``VoiceToggleResponse``
carries ``record_key`` so the TUI can both bind and display it.
* **Frontend parser/formatter** (``ui-tui/src/lib/platform.ts``):
``parseVoiceRecordKey()`` accepts ``ctrl+b`` / ``alt+r`` / ``cmd+space``
and the common aliases (``option``, ``cmd``, ``win``, …); falls back to
the documented Ctrl+B for empty / multi-character / malformed input so
a typo never silently disables the shortcut. ``formatVoiceRecordKey()``
renders for status text. ``isVoiceToggleKey`` now takes a parsed
``ParsedVoiceRecordKey`` argument; the hardcoded ``ch === 'b'`` is
gone. Default arg keeps existing call sites back-compat.
* **Hydration** (``ui-tui/src/app/useConfigSync.ts``,
``useMainApp.ts``): startup ``config.get full`` already runs; extract
``cfg.voice.record_key`` from it, parse, push into a new
``voiceRecordKey`` state, and forward to the input handler ctx
(``InputHandlerContext.voice.recordKey``). Mtime-poll path also
re-applies the parsed key so a hand-edit of config.yaml takes effect
the next tick — matches existing behaviour for display options.
* **Input handler** (``ui-tui/src/app/useInputHandlers.ts``):
``isVoiceToggleKey(key, ch, voice.recordKey)`` so the configured
binding fires.
* **Slash command** (``ui-tui/src/app/slash/commands/session.ts``):
``/voice status`` and ``/voice on`` use ``formatVoiceRecordKey`` on
the response's ``record_key`` instead of the hardcoded label.
Tests:
* ``parseVoiceRecordKey`` covers ctrl/alt/cmd/super aliases, multi-char
rejection, and empty fallback.
* ``formatVoiceRecordKey`` covers the doc examples (``Ctrl+B``,
``Ctrl+O``, ``Alt+R``, ``Cmd+B``).
* ``isVoiceToggleKey`` regression: ``ctrl+o`` configured → only ``o``
matches, not ``b``; ``alt+r`` matches both alt-bit and meta-bit
encodings (terminal protocol parity); omitted-arg call still binds
Ctrl+B for back-compat.
Full TUI suite (555 tests) passes; ``tsc --noEmit`` clean.
Fixes#18994
Co-authored-by: asheriif <ahmedsherif95@gmail.com>
