fix(web-shared): align colors with Geist

[mitul-s]

Description

Align @workflow/web-shared's default light and dark color tokens with Vercel's Geist stylesheet. The shared fallback theme now uses the same OKLCH values and defines every mapped color step.

The earlier docs-only edit has been fully reverted.

How did you test your changes?

• Exact token comparison against docs/app/styles/geistdocs.css: 94/94 light tokens and 92/92 dark tokens match, with no missing, extra, or mismatched values.
• Confirmed docs/app/styles/geistdocs.css has no net branch diff.
• pnpm dlx @changesets/cli@2.29.8 status --since=main
• git diff --check

PR Checklist - Required to merge

• 📦 Added a patch changeset for @workflow/web-shared
• 🔒 DCO sign-off passes
• 📝 Ping @vercel/workflow in a comment once the PR is ready, and the above checklist is complete

  

[changeset-bot]

🦋 Changeset detected

Latest commit: d10ce2a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 16 packages

Name	Type
@workflow/web-shared	Patch
@workflow/web	Patch
@workflow/cli	Patch
@workflow/nitro	Patch
workflow	Patch
@workflow/world-testing	Patch
@workflow/nuxt	Patch
@workflow/core	Patch
@workflow/builders	Patch
@workflow/next	Patch
@workflow/vitest	Patch
@workflow/astro	Patch
@workflow/nest	Patch
@workflow/rollup	Patch
@workflow/sveltekit	Patch
@workflow/vite	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
example-nextjs-workflow-turbopack	Ready	Preview	Aug 3, 2026 7:14pm
example-nextjs-workflow-webpack	Ready	Preview	Aug 3, 2026 7:14pm
example-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workbench-astro-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workbench-express-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workbench-fastify-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workbench-hono-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workbench-nestjs-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workbench-nitro-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workbench-nuxt-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workbench-sveltekit-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workbench-tanstack-start-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workbench-vite-workflow	Ready	Preview	Aug 3, 2026 7:14pm
workflow-docs	Ready	Preview, v0	Aug 3, 2026 7:14pm
workflow-swc-playground	Ready	Preview	Aug 3, 2026 7:14pm
workflow-tarballs	Ready	Preview	Aug 3, 2026 7:14pm
workflow-web	Ready	Preview	Aug 3, 2026 7:14pm

[github-actions]

No backport to stable for 73da40c (AI decision).

Although packages/web-shared/src/styles.css does exist on stable, this commit is a visual/design alignment rather than a stability fix: it rewrites every existing light and dark color token from HSL to new OKLCH values and adds many previously undefined token steps (e.g. --ds-black, --ds-white, --ds-*-800, --ds-*-1000, full gray-alpha and teal/pink scales). That is a change of existing defaults plus new token surface area — feature/polish work that would visibly alter the UI for users who stayed on the maintenance line, with no correctness, crash, data-loss, or security defect being fixed.

To override, re-run the Backport to stable workflow manually via workflow_dispatch and paste this commit SHA into the ref input:

73da40cbb7cf17d8d20d8930466da217ba2a5ec1