- Theme switching lives in the sidebar's Appearance panel (palette
icon): swatch list with a checkmark on the active theme, and the
'Bookshelf' section below it for wood textures; on small screens the
sidebar opens via the top-bar menu button
- Profile: account menu is the username accordion at the bottom of the
sidebar (not top-right); save button is 'Save Changes'
- Remove Wood Light/Dark/Mahogany from the Available Themes list (they
are bookshelf backgrounds, not color themes) and consolidate the
Catppuccin variants