Revert to pre-tutorial version (b0ebe11)

Deploy tutorial feature and recent fixes

Workshop: persona/advisor experiments, builds, UI polish

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

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

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

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