* add enjoyAI as option
* use enjoyai config
* may call enjoyai
* may set default ai engine
* refactor setting context
* refactor preferences
* add warning when openai key not provided
* tweak locale
* update duration for audio/video
* add balance settings
* may select ai role when create conversation
* may forward message from conversation
* tweak ui
* refactor transcribe method
* refactor ai commands to hooks
* fix webapi
* tweak playback rate options
* add playMode, next & prev, ref: #124
* upgrade deps
* may skip whisper model download
* audios/videos default order by updated_At