feat(theme): refresh the canonical tokens from the hosts and pin what they send

[acsy]

Summary

Both Crowdin hosts now run on raven (crowdin.com for a while, Enterprise since the redesign v2 merge). The registry still carried a hand-copied snapshot of the pre-raven palette, and the app-theme bridge read a host variable that Enterprise v2 no longer sends.

• Bridge reads --crowdin-primary-foreground (raven's own name, sent by both hosts) for primary-foreground and sidebar-primary-foreground. The old --crowdin-primary-btn-color was a crowdin.com-only alias; on Enterprise v2 the bridge would have fallen back to white text on the #f4f4f4 dark primary.
• Canonical theme literals and bridge fallbacks are now exactly what crowdin.com sends for each token's host variable: the neutral #262626 / #f4f4f4 scale, level-2/3/0 surfaces, alpha-based text colors. No more oklch snapshot of the blue-tinted gray and green dark primary.
• Host fixtures in tests/hosts/*.json pin the variables each host sends to app iframes, captured with pnpm capture-host <name> <css-variables.js> (trimmed to what the bridge reads plus their var() chains). New tests require every bridged variable on every captured host and the theme literals to equal crowdin.com's values, so a renamed or dropped host variable fails in CI instead of in production.
• Showcase "Simulate host" palettes are generated from the same fixtures (site/scripts/gen-host-sim.mjs); the hand-written host-sim.css with the pre-raven palette is gone.
• .idea/ is ignored.

Deployment note

The registry is not a runtime dependency: apps bake the bridge in at shadcn add time. Apps that installed the previous app-theme keep reading --crowdin-primary-btn-color until they re-add it, so they should be updated before or alongside the Enterprise v2 rollout.

Test plan

• pnpm test (21 tests)
• pnpm validate
• pnpm build
• pnpm smoke (60 items installed into the fixture app, typechecked, CSS compiled)
• pnpm site:build
• Showcase with "Simulate host" off, crowdin.com, and Enterprise in both themes: neutral primary everywhere, no green

🤖 Generated with Claude Code

[Copilot]

🟡 Changes recommended

The dark host simulation currently retains light-only fixture variables because both generated selectors match in dark mode.

1 open finding

• Exclude .dark from light theme selector · New

What changed in this PR

Refreshes canonical theme tokens from current Crowdin host palettes and keeps the showcase synchronized with captured host fixtures.

Changes:

• Updates theme values and host-variable mappings.
• Adds host fixtures, validation tests, and generated simulation CSS.
• Updates showcase build scripts, documentation, and ignore rules.

File	Description
tests/​hosts/​enterprise.json	Adds Enterprise palette fixture.
tests/​hosts/​crowdin-com.json	Adds crowdin.com palette fixture.
site/​src/​index.css	Imports generated host simulation CSS.
site/​src/​host-sim.css	Removes handwritten simulation palette.
site/​src/​app.tsx	Aligns the crowdin.com host identifier.
site/​scripts/​gen-theme.test.mjs	Derives assertions from bridge configuration.
site/​scripts/​gen-host-sim.test.mjs	Tests host simulation generation.
site/​scripts/​gen-host-sim.mjs	Generates simulation CSS from fixtures.
site/​package.json	Generates simulation CSS before builds and development.
scripts/​registry.test.mjs	Validates host variables and canonical values.
registry.json	Refreshes tokens and bridge fallbacks.
README.md	Documents host fixture maintenance.
.gitignore	Ignores JetBrains settings.

🧠 Review effort: Balanced

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