This partially reverts commit 02787b1 to avoid looping between request subtitles and start recording which results not closing the start recording dialog.
If a non final transcript was displayed and then hidden and then we receive a final transcript we remove the part that has already been shown before. If the final transcript is the same as the non final that was already displayed we don't show the final.
* ref(transcriptions): refactor transcriptions api
* ref(transcriptions): refactor usage of translation label
Extend IFrame API to allow adding a transcriber in the room without the subtitles needing to be visible.
Allow transcription chunk messages to be passed through the IFrame API if a transcriber is present.
Clean-up transcription messages sent through the IFrame API to not include timeout field and possible conflicting states (stable / unstable /final)
* fix linting
* code review: extend api message to match webhook format
