fix(catalog): check source assets and offer reachable import alternatives

src/lib/furni/source-assets.ts

@@ -0,0 +1,40 @@
+export interface SourceAssetItem {
+	id: number;
+	classname: string;
+	name: string;
+	description: string;
+	type: string;
+	revision: number;
+	category: string;
+}
+export type AssetAvailability = "available" | "missing" | "unknown";
+export interface SourceAssetCheck {
+	classname: string;
+	state: AssetAvailability;
+	revision: number;
+	alternatives: SourceAssetItem[];
+}
+export function relatedFurniture(
+	item: SourceAssetItem,
+	candidates: SourceAssetItem[],
+) {
+	const tail = (name: string) =>
+		name.toLowerCase().split("_").slice(-2).join("_");
+	const label = (name: string) => (name ?? "").trim().toLowerCase();
+	return candidates
+		.filter(
+			(candidate) =>
+				candidate.classname !== item.classname &&
+				candidate.type === item.type &&
+				((label(item.name) && label(candidate.name) === label(item.name)) ||
+					(item.classname.split("_").length >= 3 &&
+						tail(candidate.classname) === tail(item.classname))),
+		)
+		.sort(
+			(a, b) =>
+				Number(label(b.name) === label(item.name)) -
+					Number(label(a.name) === label(item.name)) ||
+				a.classname.localeCompare(b.classname),
+		)
+		.slice(0, 5);
+}