Add popup for new chat being stored

[gurveervirk]

Issue

When a user starts a new chat, then the previous new chat, with only a single query, may not be displayed in the sidebar along with the 'Send Message' button in the main chat area being disabled for a while.

This is because any new chat, on the first query, generates an appropriate title using the LLM. Only after it's completion is the new chat stored (the first time).

There is no visible indicator/explanation of this happening in the UI.

Desired Solution

Display a popup or similar in the UI to explain the above in a concise manner.

Any other solutions can be explored and suggested.