dear_llm: update

Co-Authored-By: sketch <hello@sketch.dev>
Change-ID: s9141e33d762836c9k
diff --git a/webui/dear_llm.md b/webui/dear_llm.md
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+++ b/webui/dear_llm.md
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+See webui/readme.md for build/run instructions.
+Use `npm run gentypes` to sync Go structs with TypeScript types.