[TODO Import][Client][Backlog] Quick Play and preset management

Imported from `client/TODO.md`.

## Kanban
- Column: Backlog
- Area: Client

### 2.5 Quick Play
- [ ] `/play/quick` route
- [ ] Load saved preset from localStorage (or use defaults: 1v1, 5 min, Medium, no skills)
- [ ] Show preset summary → 'Play Now' button
- [ ] Manage presets (list, rename, delete saved presets)
- [ ] **Success Criteria:** One-click play from dashboard using saved settings ✅
