RegexHelpIcon previously used a single `open` boolean driven by both hover
and click, so clicking to pin the popover open was undone by the next
mouseleave. Split into separate `pinned` (click) and `hovering` (mouse-over)
states so a click-toggle actually persists until clicked again.
The seeded `log_category` dashboard's line panel plotted the bare metric
name, since `sum()`/`rate()` always collapsed all label combinations into
one series and PromQL syntax had no way to preserve a label dimension
through an aggregation. Added `by (label, ...)` grouping and nested
`sum(rate(metric[range]))`/`avg(rate(...))` parsing, and made `rate()`
compute a real windowed time series instead of a single trailing point, so
a query like `sum(rate(log_category[1m])) by (category)` now renders one
line per category.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XFUNZwCvz3kcod3352ZR2o
