Add a log-scale bars template to the diagram kit

Andrew Dunnrequested to merge
design/kit-log-bars into main

What does this MR do and why?

I want the kit to draw quantities that span orders of magnitude, because a guide whose size comparison was built from the layers primitive had no template to start from. logbars.svg draws one bar per row on a log10 axis with labeled decade ticks from 1 KB to 10 GB, the name above each bar and the value beside it. METHOD.md gives the bar length, x = 112 * log10(value / min) rounded to the 4px grid, and a budget of six rows. The README lists the template.

References

None.

Standards affected

None.

Exemption implications

None.

Test plan

  • just guard, just validate, just check, just build and just agent pass: 21 standards passed, 0 failed, 61 pages built.
  • retoken.py --check reports logbars.svg clean, as it does layers.svg.
  • The docs template's plate sanitizer removes 0 nodes from logbars.svg: root svg, nothing removed.
  • Rendered light and dark at 390 and 1440: 4 renders, every label legible, one accent element.
  • At 390 the frame opens on the axis start and the two shortest bars with their values; the three longest values are a scroll away, as in every 960 plate.
  • Not tested: Safari, Firefox.

An AI tool wrote this change and ran the checks above.

Merge request reports