Add ThemePropertyEditor component that surfaces all customizable
properties from theme.json — typography, headings, lists, code blocks,
blockquote, table, and horizontal rule — organized into collapsible
sections with appropriate input types (number, color, select, text).
- themeSchema.ts: derives flat property list from theme.json with
auto-detected input types, units, and select options
- ThemePropertyEditor.tsx: sectioned editor with collapsible sections,
keyboard-accessible toggles, debounced live updates
- ThemeManager: add updateThemeProperty() and activeThemeContent
- SettingsPanel: show property editor below theme list when active
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
