feat: sign posted comments with a random team member

feat: localise Hub Settings and ModelBanner

feat: localise the Watch flow and stop the player from auto-playing

feat: rebuild Layout with collapsible sidebar topbar toggles and Supabase link

feat: add hand-drawn SVG icon set

feat: restyle the app with a hand-drawn sketchy aesthetic

feat: add theme context with light and dark modes

feat: add i18n context with es and en dictionaries

feat: replace youtube_hate_detector text with signalmod logo and favicon

feat: add comment composer recent activity feed and random usernames

feat: implement new models and improve UI, #23

fix: debug model selection, #22

feat: update UI using VITE+React without streamlit, #22