Missing katex/remark-math/rehype-katex dependencies break studio build (500 on startup)

[mnl-create]

Bug

Commit 464e97f ("Fix #1: Render LaTeX math in chat messages using KaTeX (#6)") added imports of katex, remark-math, and rehype-katex to src/components/prompt-kit/markdown.tsx, but did not add them to dependencies in package.json (it only committed a package-lock.json, which the pnpm-based Docker build doesn't use — and which doesn't actually pin those packages either).

Reproduction

docker compose build hermes-studio
docker compose up -d
curl http://localhost:3000   # HTTP 500

Container logs show:

ERR_MODULE_NOT_FOUND
  at async eval (/app/src/components/prompt-kit/markdown.tsx:6:1)
  at async eval (/app/src/screens/chat/components/message-item.tsx:14:1)

Fix

Add the missing dependencies to package.json (verified working in the Docker image):

"katex": "^0.18.1",
"rehype-katex": "^7.0.1",
"remark-math": "^6.0.0",

and regenerate pnpm-lock.yaml so the pnpm install layer in docker/workspace/Dockerfile installs them.