Revert to pre-tutorial version (b0ebe11)

Deploy tutorial feature and recent fixes

Workshop: sample data menu, manage page, LLM UX, HANA 422 fix

feat(experiment): multi-LLM chat with LLMChats3-style registry

Add RAG document upload and context injection for personas and advisor panels

Workshop: persona/advisor experiments, builds, UI polish

feat: advisor panel wizard, persona selection, and workshop updates

feat(persona): v2 wizard fields, chat draft sync, UX polish

Workshop UI, speech settings, experiment page, and HF Spaces deployment

Landing copy and layout updates; header brand; TTS controls; save-warning link

Landing: add Sign in and Create account CTAs; auth mode from URL

Add Neon.ai logo and header link (match phd-advisor pattern)

Header title: two lines CU STUDENT / AI Expert Advisory Panels; update document title

Header: user menu left; kebab (vertical dots) after name; dropdown align left

Fix Gemini chat (retries, JSON parse, config path), health gemini flag; always-visible user menu; Profile for guests; clearer chat errors

Initial CU Student AI Project Helper: FastAPI, Gemini, Mongo, React SPA