Phase 11: data-driven Assistant

- Deterministic advisors (src/lib/assistant): party resources (downed/bloodied/
  spent slots/rest nudges), session prep (dangling [[wiki links]], active quests,
  empty journal), live combat hints (turn, downed combatants) — pure + tested
- Data-driven encounter builder: greedily assembles level/CR-appropriate monsters
  to a target difficulty via the Phase-3 budget; one click builds + opens combat
- Assistant page: suggestion cards with one-click actions (goto, long rest,
  create note); wired into routes, dashboard, command palette
- 8 advisor/builder unit tests + assistant e2e

Conversational LLM layer intentionally deferred (no provider/key in this env);
the deterministic advisor is the offline default per the plan.

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

src/features/world/DashboardPage.tsx

@@ -13,6 +13,7 @@ export function DashboardPage() {
 }
 
 const LINKS = [
+  { to: '/assistant', label: 'Assistant', icon: '🧠' },
   { to: '/characters', label: 'Characters', icon: '🧝' },
   { to: '/combat', label: 'Combat', icon: '⚔' },
   { to: '/notes', label: 'Notes & Wiki', icon: '📜' },