## Summary
Follow-up to #1439. Empirical CDP verification on staging caught a
residual bug: the customizer per-role override updated
`documentElement.style` (where the override helper writes) but mounted
SVG markers and other CSS-var consumers kept showing the active preset
colour.
## Root cause
`cb-presets.js` ships stylesheet rules of the form:
```css
body[data-cb-preset="deut"] {
--mc-role-companion: #648FFF;
...
}
```
This selector beats inheritance from `:root.style` (which is where
#1439's `setRoleColorOverride` wrote). Body inline style beats both.
## Fix
`setRoleColorOverride` now writes the override to BOTH
`documentElement.style` and `document.body.style`. The first-override
snapshot is captured per target so clear-override still restores the
active preset value (#1412 contract preserved).
## Verification
- `test-issue-1438-marker-css-vars.js` extended with assertion E2
(helper touches `document.body` / `body.style`)
- `test-issue-1412-customizer-no-override.js` — 13/13 still pass
(clear-override-restores-preset)
- `test-issue-1407-cb-preset-propagation.js` — 61/61 still pass
- Staging CDP verified: `applyPreset('deut')` +
`setRoleColorOverride('companion', '#ff00ff')` repaints all 55 mounted
companion markers to magenta without reload.
## Preflight
`bash ~/.openclaw/skills/pr-preflight/scripts/run-all.sh origin/master`
— clean.
Fixes the residual case left after #1439.
Co-authored-by: OpenClaw Bot <bot@openclaw>
Kpa-clawbot
074e3d6bed
