Fix compact control foregrounds

[brxs]

What changed

• separates the compact text-signal typography utility from the semantic gold signal color
• exposes gold explicitly as text-brand-signal
• adds regression coverage for both the token package and installed UI consumer CSS
• prepares @protocol-works/design-tokens@0.2.1 and @protocol-works/ui@0.3.2, with the UI package requiring the corrected token baseline

Why

The Tailwind theme exposed both a --text-signal font-size token and a --color-signal color token. Tailwind resolved text-signal as the color utility, so compact Fields, Inputs, Textareas, Buttons, and related controls inherited gold instead of receiving the intended 13px type size.

Impact

Ordinary compact controls render with their contextual black/white foreground again. Gold remains available only when a consumer explicitly requests the brand signal color.

Verification

• npm run check
• npm pack --dry-run
• npm pack --dry-run --workspace @protocol-works/ui
• verified generated .text-signal contains font-size and no signal color
• verified both packages contain the intended release files