Fix 'have to type twice' bug: session_state as single source of truth

Move 'modified since last review' flag from app to Admin

Invalidate a question's review status when the question is edited

Form: show full review history across all versions (not just loaded one)

Form: show a Pass / Needs fix / Pending badge per question

Form: show per-question reviewer feedback inside each question block

Prefix review notes with 'Reviews:' in admin + form feedback

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

Rename to 'Trial Design Benchmark'

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