[FEAT] price changes over short time periods

[Hallo5000]

Is your feature request related to a problem? Please describe.
When looking to take a train from city A to city B but you don't want to rely on luck that one specific train has a good price and maybe you have one or two hours of spare time anyway, you need to check every single train for this route (A -> B) which depending on the route can be a lot of connections/trains.

Describe the solution you'd like
When entering a specific connection there could be an optional field with +/- x minutes/hours describing a time range in which the app can search for other connections. Then there could be a graph describing the minimal price over the time period given.

Describe alternatives you've considered
Instead of +/- fields there could be an entire search option instead of entering the final link (but I guess this would be much harder to implement).
Instead of the graph there could be a list which can be sorted from lowest to highest price

Additional context
Good luck I guess xD (and props to the devs for developing such an awesome project)

[FunctionDJ]

This is a possible and logical optimization angle that we should look into, but it might turn out infeasible because of the amount of requests we might have to make.

If we implement this, it might need to be an explicit "slow mode", taking potentially tens of minutes to complete if the time span is large, like many hours.

I think this feature is almost the same as the Bestpreissuche (screenshot below), just with split-ticketing optimization underneath it.