Implement the 029-on-demand-bestiary feature that replaces the bundled XMM bestiary JSON with a compact search index (~350KB) and on-demand source loading, where users explicitly provide a URL or upload a JSON file to fetch full stat block data per source, which is then normalized and cached in IndexedDB (with in-memory fallback) so creature stat blocks load instantly on subsequent visits while keeping the app bundle small and never auto-fetching copyrighted content

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/application/src/ports.ts

@@ -1,6 +1,11 @@
-import type { Encounter } from "@initiative/domain";
+import type { Creature, CreatureId, Encounter } from "@initiative/domain";
 
 export interface EncounterStore {
 	get(): Encounter;
 	save(encounter: Encounter): void;
 }
+
+export interface BestiarySourceCache {
+	getCreature(creatureId: CreatureId): Creature | undefined;
+	isSourceCached(sourceCode: string): boolean;
+}