feat(frontend): editor refresh (embed studio, comment popover, shiki, top bar, hooks, styles)

refactor: remove MUI, unify publisher pipeline, add shared component registry

feat: adopt template CSS architecture, hero/TOC/color alignment

fix: rename to Research Article Template Editor

refactor: rename to Science Article Template Editor, remove MDX export, fix settings drawer

fix: replace y-websocket with @hocuspocus /provider for protocol compatibility

fix: resolve TipTap v3 collaboration crash

chore: upgrade all TipTap packages to v3

chore: initial commit