catppuccin v2.0.0 renamed its lualine theme files; there is no longer a
plain "catppuccin" theme, only per-flavour files (catppuccin-mocha, etc.)
and catppuccin-nvim. The old name no longer resolved, so lualine fell back
to the auto theme and emitted a notice. Pin to catppuccin-mocha to match
the configured colorscheme flavour.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Emma Thorpe