* fix(gateway): use truncateUtf16Safe for voice-wake trigger truncation
Replace naive .slice(0, 64) with truncateUtf16Safe() in
normalizeVoiceWakeTriggers to prevent surrogate pair splitting
in user-configured voice wake trigger phrases.
Voice wake triggers are user-configurable text strings that may
contain emoji or non-BMP characters. A naive .slice(0, 64) at
a surrogate pair boundary produces a lone surrogate, which
corrupts the trigger text.
Co-Authored-By: Claude <noreply@anthropic.com>
* test: add proof scripts for C1 sanitize and voice-wake UTF-16
* chore: remove unrelated proof script from voice-wake PR
ClawSweeper review: the console-sanitization proof script belongs
to #103226, not this gateway voice-wake fix. Remove it to keep the
branch clean.
Ref: #103210 review
* fix(gateway): harden voice wake unicode boundary
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Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Peter Steinberger <steipete@gmail.com>