Dynamic Tariff UI: Add support for shorter time slots (< 1h)

[IamMattM]

I would like to clarify how a smart grid tariff like the one from octopusenergy AGILE-23-12-06 , which changes every 30minutes, is handled by EVCC ?

I can see that the U.I only presents the cost of the Kwh in a full hourly slot, with the cost for this hour slot based on the cost at the beginning of the hour only (no averaging with the second half of the hour).

Is evcc correctly handling tariffs that have Kwh costs changing within a one-hour period ?

evcc tariff API request command , for AGILE-23-12-06correcly shows those half-hourly costs changing but I am not certain as to whether evcc works in the backgground "honouring" those intra-hourly varying costs ?

https://imgur.com/a/yxKRL3v