Edit (solution), summarized from answer below:
Cloud console > billing > reports > preset views (at right) > current month all services (instead of "all projects")
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I'm trying to see which aspects of my project are incurring costs, specifically the cost for build time and compute time on a given day.
I can access my invoice, but this only gives my a total per day per project, without itemizing resource costs.
There's this question: Where to find Google Cloud Compute Cost Breakdown?
But that doesn't point to specifics. Is there not some easy way to just see a chart or cost list per project?
I see in the docs there used to be a way to download a file, which is now deprecated (!).