Campaign and game-day pages; games, settings, audit log

- [ ] Campaign page: lifecycle and actions, cadence, quorum, roster with flake memory, upcoming sessions, past sessions with attendance, open polls, `auto_resolve_polls` toggle.
- [ ] Game day page: same shape for a day — signups/waitlist, seating state, tables played.
- [ ] Games admin; settings admin (guild/channel ids, reminder ladder steps, horizon); audit log view.
- [ ] Delete-my-data reachable from the console, calling the phase-0 path.

Start by mapping the existing console entry points and the phase-0 delete-my-data path; the payload does not name specific files or tests. Define completion against the checklist: campaign and game-day views, games and settings administration, audit log, and reachable data deletion are all present and functional.

Rédigé par le modèle d'indexation à partir du texte de l'issue.