Theme sources

The generate flow resolves source flags in this precedence order:

favorite > last > random > pick > provided

A provided source is the --color seed, which defaults to #6750A4. --theme [name] loads an included custom definition from the package-root themes/ directory instead of deriving a scheme from a seed. --all discovers custom definitions and generates each one.

Favorites and the last seed live in ~/.tg.json; see the configuration file reference. The picker source requires Pastel, while the other source types do not.