feat(odin): Phase 2a read-only agentic assistant + tool-trace UI

- agentic chat loop (max 6 round-trips, budget re-checked between iterations)
  over 10 read-only, permission-delegated tools in src/services/ai-tools.ts
- persist assistant tool trace in ai_chat_messages.content_json (+ migration)
- consulted-tools chips in OdinThread; header now shows month spend only
  (budget cap hidden from the UI, server-side 402 guard unchanged)
- seed: ai.use permission; Settings exposes the ai permission module
- docs: REVIEW consolidation; deployment-guide.md superseded by docs/release.md

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

prisma/seed.ts

@@ -295,6 +295,16 @@ const PERMISSIONS: {
     module: "warehouse",
     description: "Vytvářet a potvrzovat inventurní sčítkání",
   },
+
+  // AI asistent (Odin) — mirrors migration 20260608120000_add_ai_assistant;
+  // the seed WIPES permissions, so every migration-added permission must also
+  // live here or a dev reseed silently loses it (happened 2026-06-10).
+  {
+    name: "ai.use",
+    display_name: "AI asistent",
+    module: "ai",
+    description: "Používat AI asistenta (chat a import faktur)",
+  },
 ];
 
 async function main() {