Is it maybe in future plans to allow to see more than a week in the wallet transfers, upvote history and so on?

Yes, I've planned this for a long time and a button to go back to the past days will definitely be added soon.

Originally it was planned to add a date picker so that one can jump directly to a specific day/week but I can't load the account operations by time, just by index, so I would need to parse and handle all ops on my server first, which is a bit more time consuming to be done.

But I will do my best to get it working in future ;)