Avoid late-interaction open-weights color clash - #32

Related to embeddings-benchmark/mteb#4862.

Summary:

• Changes the late-interaction model-type tint from green to teal.
• Keeps the open-weights badge green, so model type and availability no longer share the same visual color.
• Updates the local palette note in CLAUDE.md to match the CSS mapping.

Validation:

• PUBLIC_API_URL=http://localhost:8000 npm run check
• npm run lint:style
• npm run lint:format -- src/app.css CLAUDE.md
• npm run test:unit

Note: PUBLIC_API_URL=http://localhost:8000 npm run build reaches Vite/SSR rendering but fails locally because no API server is running at that URL (ECONNREFUSED).