theme() doesn't generate tokens until someone explicitly defines them

[AndreyYolkin]

Version

0.14.1

Reproduction repo (check uno.config and src/App.vue)

GH: https://github.com/AndreyYolkin/uno-nested-theme-keys
CSB: https://codesandbox.io/p/devbox/github/AndreyYolkin/uno-nested-theme-keys

Description

We want to utilize unocss as colors token manager and apply colors via theme() directive.

However, there is an issue with generating the token for color which is only used in theme and never more.

What we expect

What we got

Additional moment

This token begins to work if this color is mentioned inside atomic class. For example, after I gave bg-button-primary to a random element (or even mention in the comment) --un-preset-theme-colors-button-primary variable becomes generated

Little UPD: nesting doesn't matter, as occurs. Second button has color because the class 'bg-primary' was present