fix(docs): configure Svelte documentation cutover

[dancormier]

Summary

• document the Svelte documentation branch/domain contract
• add a forced permanent redirect from the beta hostname to the current hostname
• use Netlify’s BRANCH value in extractor logging
• test current-domain generated links and redirect configuration

Jira

STACKS-855

Verification

The current Netlify configuration does not create a stacks-svelte deploy preview for this branch. Verify the generated site locally:

1. Install and build using the environment Netlify will supply for main:

   npm ci
   BRANCH=main CONTEXT=production npm run storybook:build -w packages/stacks-svelte

2. Serve the generated output:

   python3 -m http.server 4173 --directory packages/stacks-svelte/netlify/dist

3. Open these representative pages:

   • Getting Started documentation
   • Avatar component story
   • Generated LLM documentation

4. Confirm:

   • the documentation and component story render with their assets;
   • the browser console has no errors or failed asset requests;
   • the site has no beta badge;
   • documentation and story links in llms.txt use https://svelte.stackoverflow.design.

5. Inspect packages/stacks-svelte/netlify.toml and confirm the forced 301 rule maps:

   https://beta.svelte.stackoverflow.design/*
   → https://svelte.stackoverflow.design/:splat
   

   The hostname redirect cannot execute through the local static server. Its path/query behavior must be verified separately when the beta hostname is attached to the updated Netlify production deployment.

Accessibility

No semantic or interaction changes. Svelte lint completed with no errors or warnings.

Changeset

Not required. This changes documentation and hosting configuration.

Deployment

This PR does not change live Netlify settings. Its merged commit is a prerequisite for the separately reviewed domain cutover.

[netlify]

✅ Deploy Preview for stacks ready!

Name	Link
🔨 Latest commit	64a0791
🔍 Latest deploy log	https://app.netlify.com/projects/stacks/deploys/6aa9b7b87cb9ed00084a3d34
😎 Deploy Preview	https://deploy-preview-2400--stacks.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
🤖 Make changes	Run an agent on this branch

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[netlify]

✅ Deploy Preview for stackoverflow-email ready!

Name	Link
🔨 Latest commit	64a0791
🔍 Latest deploy log	https://app.netlify.com/projects/stackoverflow-email/deploys/6aa9b7b8e310ab0008e9df2f
😎 Deploy Preview	https://deploy-preview-2400--stackoverflow-email.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
🤖 Make changes	Run an agent on this branch

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 64a0791

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