WKWebView doesn't invalidate ::before/::after pseudo-element styles when
CSS custom properties change via inline styles alone — offsetHeight reflow
only triggers layout, not style recalculation. This caused bullet size and
bullet color (rendered via ::before on bulletListItem) to not update live
when editing a theme note and saving with Cmd+S.
Fix: after setting CSS vars as inline styles, also inject them into a
<style> element. Replacing <style> content forces a full style tree
invalidation in WebKit, covering pseudo-elements that reference var().
Also extract shouldDeactivate/deactivateTheme helpers from useThemeManager
to reduce cyclomatic complexity (CodeScene: 8.77 → 9.6).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
93b654101c