Reviewer sees review history across all versions

Admin shows only the latest version per trial

Show reviews when retrieving a version

Save every submit as a new version; let users pick a version to load

Make submissions editable; load by trial_id + username

Store each review as a separate file under reviews/<submission>/

Support multiple reviews per submission with full history

Add Streamlit/HF-Space version; move Next.js code into legacy/

Switch storage to Hugging Face Dataset; add /admin review console

Add free-text input when design_element is 'Others'

Dropdowns for design_element/question_type; auto-generate rubrics from question type

Initial commit: clinical trial intake form