Use Lucy Restyle realtime endpoint

[AdirAmsalem]

Summary

• Upgrade @decartai/sdk from ^0.0.6 to ^0.1.13.
• Replace the deprecated Mirage realtime model selection with the canonical lucy-restyle-2 endpoint.
• Update realtime prompt calls to the current SDK { enhance: true } option and type the realtime client ref.
• Update README/CLAUDE docs to reference the Lucy Restyle realtime model.

Human TL;DR

TODO(requester): Fill this in with the human-facing summary before marking the PR ready for review.

Validation

• npm run build
• git diff --check
• rg -n -i "mirage|mirage_v2|0\\.0\\.6|should_enrich|model selector" CLAUDE.md README.md components package.json package-lock.json returned no matches
• Independent Codex review: no discrete bugs found in modified areas

Notes

• npm run lint currently prompts to create an ESLint config instead of running non-interactively.
• npx tsc --noEmit still fails on a pre-existing unused components/theme-provider.tsx import of missing next-themes; unchanged from origin/main.
• Requested by Ido Dan. Private Slack DM context omitted because this is a public repository.