The Chainlit UI (including the copilot) has been completely re-written with Shadcn/Tailwind. This brings several advantages:

1. The codebase is simpler and more contribution friendly.
2. It enabled the new custom element feature.
3. The theme customisation is more powerful.

Added

• Custom Elements (code your own elements)
• Cmd+k thread search
• Thread rename
• Official PostGres open source data layer
• New @data_layer decorator for configuring custom data layers declaratively

Changed

• Authentication is now based on cookies. Cross Origins are disallowed unless added in allow_origins in the config.toml file
• No longer need to click on resume to resume a thread
• [breaking]: Theme customisation is now handled in public/theme.json instead of config.toml.
• [breaking]: Changed fields on the Action class:
  • The value field has replaced with payload which accepts a Python dict
  • The description field has been renamed tooltip
  • The field icon has been added
  • The collapsed field has been removed.
• [breaking]: Completely revamped audio implementation (#1401, #1410):
  • Replaced AudioChunk with InputAudioChunk and OutputAudioChunk
  • Changed default audio sampling rate from 44100 to 24000
  • Removed several audio configuration options (min_decibels, initial_silence_timeout, silence_timeout, chunk_duration, max_duration)

Fixed

• Autoscaling of Chainlit app behind a load balancer should now work. Don't forget to enable sticky sessions