Adds a compact time-of-day chart to the agentic activity card: the average number of agents running at once in each New York quarter hour, over the days any ran in the page's period, under a faint line of the peak. The stat row gives distinct agents and the most at once. It follows the period picker.
A run spans an agent's scrobbles while they are at most an hour apart. The build reads the scrobble_usage rows it already stores.
Verified: cargo fmt, clippy, cargo test (runs, periods, NY quarters, the repeated DST hour), node --check, and a live-data mockup at 1280 and 420 px, dark and light.
Before:
After:
🤖 Generated with Claude Code