feat: auto-repair sprite_id drift after every import

The emulator sends items_base.sprite_id to the client and Nitro resolves
the furniture by looking up that id in FurnitureData.json. Legacy rows
where sprite_id drifted from the id made the client render a completely
different item (e.g. a wired or custom asset instead of the purchased
furniture).

Add verifyAndFixSpriteIds() which repairs any row whose sprite_id no
longer matches its id while the local furnidata carries the item under
that id, and run it after every import path (single, batch, batch-regen,
clone) next to the offer_id rebuild.

src/lib/services/furni-data.ts

@@ -656,3 +656,61 @@ export async function rebuildCatalogOfferIds(): Promise<CatalogOfferRebuildResul
 		return { checked: catalogRows.length, fixed, fallback };
 	});
 }
+
+export interface SpriteIdVerifyResult {
+	/** items_base rows examined. */
+	checked: number;
+	/** Rows whose sprite_id was corrected to their id. */
+	fixed: number;
+}
+
+/**
+ * Verify that every items_base.sprite_id matches its id whenever the local
+ * FurnitureData.json carries the item under that id.
+ *
+ * The emulator sends sprite_id to the client and Nitro resolves the furniture
+ * by looking up that id in the furnidata — a stale sprite_id makes the client
+ * render a completely different item (e.g. a wired or a custom in place of a
+ * seaside sofa). Imports always write sprite_id = id, but legacy rows may
+ * drift; this pass repairs them after every import.
+ */
+export async function verifyAndFixSpriteIds(): Promise<SpriteIdVerifyResult> {
+	return withFurniDataLock(async () => {
+		const furniData = (await readFurniData()) as Record<
+			string,
+			{ furnitype?: Array<Record<string, unknown>> }
+		>;
+		const classById = new Map<number, Set<string>>();
+		for (const section of ["roomitemtypes", "wallitemtypes"] as const) {
+			for (const e of furniData[section]?.furnitype ?? []) {
+				const entryId = Number(e?.id);
+				const cn = typeof e?.classname === "string" ? e.classname : "";
+				if (!Number.isFinite(entryId) || !cn) continue;
+				const set = classById.get(entryId) ?? new Set<string>();
+				set.add(cn);
+				classById.set(entryId, set);
+			}
+		}
+
+		const rows = await db
+			.select({
+				id: ItemsBase.id,
+				spriteId: ItemsBase.spriteId,
+				itemName: ItemsBase.itemName,
+			})
+			.from(ItemsBase);
+
+		let fixed = 0;
+		for (const row of rows) {
+			if (row.spriteId === row.id) continue;
+			const entries = classById.get(row.id);
+			if (!entries?.has(row.itemName)) continue;
+			await db
+				.update(ItemsBase)
+				.set({ spriteId: row.id })
+				.where(eq(ItemsBase.id, row.id));
+			fixed++;
+		}
+		return { checked: rows.length, fixed };
+	});
+}