The Asset Graph needs to treat partitions as a first class citizen, e.g.

asset1 -> asset2

does not make sense. It needs

asset1.partion1 -> asset2

We need to bring in a mini version of the run matrix from the Partitions and be able to scroll thru each partition to see that partition's graph. Here is a very ugly mockup

@Ming Fang you're right that this is something we need to improve on. I filed an issue to track it: https://github.com/dagster-io/dagster/issues/7582