fix(layout): align color scheme, content width and fonts with reference theme
- Color scheme: zibll field order/labels, theme_skin_custom overrides palette,
hex palette swatches, dark_theme_skin_custom, light/dark background images,
close_backdrop via body.fps-accelerat, theme_main_radius drives --main-radius
- Emit --theme-color / --focus-shadow-color / --focus-color-opacity* vars
- Drop border_radius, primary_color readers and legacy value maps
- Content max width: free 1200-2200 number field; fix font family/custom stack
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
kate522andClaude Fable 5
74021d26bb