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>

apps/web/src/components/source-manager.tsx

@@ -0,0 +1,81 @@
+import { Database, Trash2 } from "lucide-react";
+import { useCallback, useEffect, useState } from "react";
+import type { CachedSourceInfo } from "../adapters/bestiary-cache.js";
+import * as bestiaryCache from "../adapters/bestiary-cache.js";
+import { Button } from "./ui/button.js";
+
+interface SourceManagerProps {
+	onCacheCleared: () => void;
+}
+
+export function SourceManager({ onCacheCleared }: SourceManagerProps) {
+	const [sources, setSources] = useState<CachedSourceInfo[]>([]);
+
+	const loadSources = useCallback(async () => {
+		const cached = await bestiaryCache.getCachedSources();
+		setSources(cached);
+	}, []);
+
+	useEffect(() => {
+		loadSources();
+	}, [loadSources]);
+
+	const handleClearSource = async (sourceCode: string) => {
+		await bestiaryCache.clearSource(sourceCode);
+		await loadSources();
+		onCacheCleared();
+	};
+
+	const handleClearAll = async () => {
+		await bestiaryCache.clearAll();
+		await loadSources();
+		onCacheCleared();
+	};
+
+	if (sources.length === 0) {
+		return (
+			<div className="flex flex-col items-center gap-2 py-8 text-center">
+				<Database className="h-8 w-8 text-muted-foreground" />
+				<p className="text-sm text-muted-foreground">No cached sources</p>
+			</div>
+		);
+	}
+
+	return (
+		<div className="flex flex-col gap-3">
+			<div className="flex items-center justify-between">
+				<span className="text-sm font-semibold text-foreground">
+					Cached Sources
+				</span>
+				<Button size="sm" variant="outline" onClick={handleClearAll}>
+					<Trash2 className="mr-1 h-3 w-3" />
+					Clear All
+				</Button>
+			</div>
+			<ul className="flex flex-col gap-1">
+				{sources.map((source) => (
+					<li
+						key={source.sourceCode}
+						className="flex items-center justify-between rounded-md border border-border px-3 py-2"
+					>
+						<div>
+							<span className="text-sm text-foreground">
+								{source.displayName}
+							</span>
+							<span className="ml-2 text-xs text-muted-foreground">
+								{source.creatureCount} creatures
+							</span>
+						</div>
+						<button
+							type="button"
+							onClick={() => handleClearSource(source.sourceCode)}
+							className="text-muted-foreground hover:text-hover-danger"
+						>
+							<Trash2 className="h-3.5 w-3.5" />
+						</button>
+					</li>
+				))}
+			</ul>
+		</div>
+	);
+}