feat(theme-studio): emit the full face-attribute model from build-theme

I extended build-theme's emitter to the full attribute set: family, distant-foreground, a weight and slant range, structured underline (color and wave), overline, strike color, inverse-video, extend, and inherit/height on every tier. It still reads the legacy boolean bold/italic/underline/strike fields, so every committed preset round-trips unchanged.

The emitter is the first piece of widening the studio to all face attributes; the model and UI that produce these fields come next. To keep the change clean I refactored --attrs from nine positional arguments to a single face-spec object and lifted the accessor helpers above their callers.

Added 40 ERT tests covering legacy compatibility, each new attribute, the coercion helpers' edge cases, and an end-to-end round-trip that loads a theme and reads the attributes back off the faces. They run in the theme-studio suite as a new stage.

0 files changed, 0 insertions, 0 deletions