[bug]: Alert destructive description text in new-york-v4 falls below WCAG AA with default theme

[galoi]

Describe the bug

The new-york-v4 Alert sets the destructive description text to text-destructive/90.

With the default theme tokens documented in the repo, that pushes the description text very close to or below the WCAG AA threshold for normal text on a white card background.

In particular:

• apps/v4/registry/new-york-v4/ui/alert.tsx uses *:data-[slot=alert-description]:text-destructive/90
• apps/v4/content/docs/(root)/theming.mdx documents the default token --destructive: oklch(0.577 0.245 27.325) and --card: oklch(1 0 0)

Using those defaults, the destructive text is roughly:

• text-destructive: #e7000b, contrast vs white about 4.765:1
• text-destructive/90: #ea1a23, contrast vs white about 4.516:1

In downstream accessibility checks this can show up as a failure around 4.49:1, so the current template is effectively on the threshold and can fail for normal-size body text.

This appears to come from the shipped new-york-v4 Alert template itself rather than from downstream customization.

Affected component/components

Alert (new-york-v4)

How to reproduce

1. Check the current main branch.
2. Use the default theme tokens documented in apps/v4/content/docs/(root)/theming.mdx.
3. Render a destructive Alert with a title and description using apps/v4/registry/new-york-v4/ui/alert.tsx.
4. Inspect the description text color coming from *:data-[slot=alert-description]:text-destructive/90.
5. Run an accessibility check such as axe / Storybook a11y / Lighthouse.
6. The description text can fail color contrast for normal body text on the default white card background.

Codesandbox/StackBlitz link

Not prepared yet. The issue is reproducible from the current main branch using the shipped apps/v4/registry/new-york-v4/ui/alert.tsx together with the default theme tokens documented in the repo.

Logs

Example a11y output from a downstream reproduction:
Element has insufficient color contrast of 4.49 (foreground color: #ea1a23, background color: #ffffff, font size: 14px, font weight: normal). Expected contrast ratio of 4.5:1.

System Info

Observed in a local downstream reproduction on macOS with Chrome and Storybook a11y.
The underlying issue appears to be template/token based because it comes from the current `main` `new-york-v4` Alert classes plus the documented default theme values.

Before submitting

• I've made research efforts and searched the documentation
• I've searched for existing issues