Theme.json Design Manager

1.0.0

• Initial release.
• Color palette, spacing scale, typography scale, border radius, and shadow preset management.
• Live previews for colors, radius, and shadows.
• Fluid typography with clamp() support.
• Drag-to-reorder for spacing tokens.
• Settings tab with toggles to hide default presets from the editor.
• Reserved slug protection — auto-renames color slugs that collide with WordPress core marker classes.
• Diagnostics tab — runtime view of stored tokens, merged palette, CSS variables, and preset classes.
• Base color fallback — ensures –wp–preset–color–base stays defined when replacing the theme palette.
• Full theme.json integration via wp_theme_json_data_theme filter.
• Extensibility hooks for developers.