v0.56.0

The browser's colour scheme has to reach the canvas

The browser check now drives DevTools' emulated media and reads the canvas
back: the page's own prefers-color-scheme has to reach the workbench, both
ways, and the reader's own choice has to survive the system changing under it.

the canvas is 0.198 dark with the browser reporting light
the browser said dark and the canvas went from 0.198 to 0.755 dark
the browser said light again and the canvas went back to 0.198 dark
the reader's own choice survived the system changing under it

⛔ This is the one CI guarantee the retired second editor had and this did not
(#111). The Go tests drive the theme through a fake host, which says what the
workbench does when it is told the system changed and nothing about whether
the page ever tells it.

It runs at both pixel ratios, with no workflow change.

[2026-11-10]

🤖 Generated with Claude Code