Add a history page (static)

[niuguy]

The idea is simply to add a static history page and store the generated reports in a local SQLite database. Here are some screenshots for reference:

This is more of a proposal, but I think it might be more straightforward to submit a PR. Looking forward to the feedback!

[ElishaKay]

Love it.

I'm voting for Postgres as the default data store, since it's also supported by langchain vector stores - see PGVector

But, great proof of concept :)

[niuguy]

@ElishaKay Yes, integrating with Postgres is certainly viable if that’s the plan. I’m using SQLite for now just for simplicity—it’s just a single file for the database, after all