The toggle changed data-theme but the preview stayed dark: applyColorScheme
resolves donor scales from the instance's EFFECTIVE mode (#resolveDonorScales
ignores the per-call mode option), and the boot had no modeSource — so the
scheme always derived dark neutrals/surfaces and overrode the foundation's
light tokens. Bound a modeSource to the `mode` state (grafito pattern) +
fire its listeners on change, so the instance mode follows the toggle and the
scheme re-derives correctly. Verified: surface oklch(0.21)↔(0.98), content
flips, both modes read cleanly.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
dev
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