XB AI: Encountering QuotaExceededError while saving the chat history in session storage

Used indexedDB instead

I tested this and i can confirm that functionality wise it's working as expected. If we get an approval on the usage of indexedDB then happy to RTBC it.

Re: using IndexedDB, I don't see why not. 🙂

What's in the MR feels manageable, but in case the code to interact with IndexedDB grows in the future, we can consider adding something like localForage as an abstraction.