* Fix race condition when toggling transcription via SIGUSR2
The toggle state was being set to false immediately when stop was called,
but the actual transcription runs asynchronously. If another signal arrived
before transcription completed, a new recording could start while the old
transcription was still running, causing the old text to paste unexpectedly.
Now the toggle state stays true until the async transcription task completes.
* remove import
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Co-authored-by: CJ Pais <cj@cjpais.com>
ae9c33e0c7