Shift Chat UI to https://ui.llamaindex.ai/

[MODSetter]

Current chat UI is very bloaty and it is a big issue. This is currently work in progress by @Utkarsh-Patel-13 and already work in progress. It should improve the user experience by a lot.

Screen_Recording_2025-07-22_at_10.37.50_PM_1.mp4

[Utkarsh-Patel-13]

@MODSetter Thanks for raising this issue. And sharing the video

New chat is under construction 🚧