feat(finale): full ceremony UI — admin console, jury phases+notes, deliberation flow, audience voting, big-screen view

- Admin Ceremony tab: phase driver with real server timers + overtime, run
  order with category grouping + send-to-screens, audience windows + QR
  dialog, override slides, timing log, results reveal builder/stepper
- Admin Deliberation tab: per-category session creation from the round's
  jury group, open/close voting, tally/runoff/override/finalize
- Jury live page: ON_DECK/PRESENTING/QA/SCORING aware, autosaved notes,
  vote comments; LiveVotingForm fixed (criteria score >10 rejection bug,
  permanent lock-out after submit) and made revisable
- Jury deliberation page: identityless submitVote, review-before-rank
  context (finale scores editable, ceremony notes, docs link)
- Jury nav: Live Ceremony + per-category Deliberation links
- Public: rebuilt QR audience voting page (anonymous-safe, favorite-pick
  windows, change-until-close), new /live/ceremony/[roundId] projector view
  with animated reveal, confetti, audience QR slide, override slides

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package.json

@@ -79,6 +79,7 @@
     "openai": "^6.16.0",
     "papaparse": "^5.4.1",
     "pdf-parse": "^2.4.5",
+    "qrcode.react": "^4.2.0",
     "react": "^19.0.0",
     "react-day-picker": "^9.13.0",
     "react-dom": "^19.0.0",