Define 13 semantic color tokens (surface, text, border, hover) with
light/dark values in themes.css. Register with Tailwind via @theme inline.
Migrate all 335 Vue files from hardcoded gray/white classes to semantic
tokens. Add theme toggle (sun/moon/system) in user avatar dropdown.
Replace @tailwindcss/forms with custom form reset using theme vars.
Add status badge and alert tokens for dark mode. Theme-aware chart
grid/labels, skeleton placeholders, and editor. Inline script in
<head> prevents flash of wrong theme on load.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
