feat: add in-app help guide with ❓ button in top bar

feat: show all pages with jump-to-mention navigation

ui: 5 polish fixes

fix: don't fetch docs until annotatorName is set

feat: multi-corpus support

fix: add source='human' to manual annotation payload for leaderboard tracking

feat: per-annotator document assignments with configurable overlap

feat: add annotation leaderboard with medals and stats

feat: per-annotator validation support for multi-user overlap

feat: warn on unverified mentions when clicking Next, move progress to top-right

refactor: make progress bar contextual - shows current PDF/page/mentions position

feat: add progress tracking with docs/pages/mentions verification stats

fix: clamp restored pageIdx to valid range on doc change

feat: persist doc/page selection across refreshes via sessionStorage

feat: add loading spinner and error fallback to PDF viewer

feat: on-demand document loading, no limit, PDF loading indicator

fix: open OAuth login in new tab to bypass iframe restrictions, auto-poll for cookie

security: gate app behind HF OAuth login

fix: use _rawIndex for delete/validate to avoid index mismatch after filtering

update: reverted local changes

security: gate app behind HF OAuth login

feat: per-annotator document assignment

feat: HF OAuth login, increase docs to 50, filter consensus non-datasets

filter: hide consensus non-datasets (model + judge agree)

fix: strip markdown from rawText before indexOf for annotation position

feat: human validation, recursive highlighting, data mentions rename

feat: add remark-gfm to support markdown tables

style: add ReactMarkdown and dark mode Typography to extracted text pane

feat: implement dual local/HF storage with page-level UI tracking

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