- Right panel order now: Lock → Library → Mode → Colour → Font →
Background → Nav → Hero → Sections
- Lock In was always disabled because selectedThemeId was null until
user explicitly clicked a library button; now uses previewId (which
defaults to first theme) for the disabled check
- Added useEffect to notify parent of the default library selection on
mount so handleLock always has a theme to save
- handleLock also falls back to first theme as double safety net
Made-with: Cursor
Mark Henderson
a1b605febf