A right-click on either ruler (or the origin box) now opens a context
menu listing the ten document units, the current one checked. Choosing
one runs document.setUnits — the same one-undo-step change as
Preferences ▸ Units ▸ General / Document Setup.
The guide-drag interact on each ruler becomes click-and-drag so the same
widget both drags out guides (left) and opens the unit menu (right); the
origin box gets its own click interact. checked() reports the active unit
so the menu shows the check-mark; the unit labels are already translated
as the Units preference choices.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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