Fix TypeScript errors and implement furniture import ID integrity with 18+ age verification

- Add termsAccepted and ageVerified columns to User table
- Update register schema with new boolean fields
- Fix register form age verification checkbox (th -> t)
- Fix furni-import spriteId declaration order
- Fix batch route variable naming (id -> spriteId)
- Fix catalog-audit import path and ensure correct types
- Hardened import with per-item id conflict checks
- Added audit option for FurnitureData.json spriteId conflicts
- Updated tagline to include Leeftijdsvereiste: 18+

src/lib/services/catalog-audit.ts

@@ -16,6 +16,7 @@ import {
 	repairFurniData,
 	repairOrphanedCatalog,
 } from "./catalog-repair";
+import { readFurniData } from "./furni-data";
 import { ensureDirectories } from "./furni-import";
 import {
 	assetNameCandidates,
@@ -118,6 +119,7 @@ export interface AuditSummary {
 	duplicatesMerged: number;
 	duplicateRowsRemoved: number;
 	remappedReferences: number;
+	furniDataIdConflicts: number;
 }
 
 export interface CatalogAuditOptions {
@@ -128,6 +130,7 @@ export interface CatalogAuditOptions {
 	organizeSql?: boolean;
 	repairFurniData?: boolean;
 	repairStructure?: boolean;
+	checkFurniDataIds?: boolean;
 }
 
 export async function runCatalogAudit(
@@ -722,6 +725,60 @@ export async function runCatalogAudit(
 		}
 	}
 
+	// ── FurnitureData.json id conflict check ──────────────
+	let furniDataIdConflicts: {
+		classname: string;
+		itemId: number;
+		conflictingId: number;
+		existingClassname: string;
+	}[] = [];
+	if (options?.checkFurniDataIds) {
+		onEvent?.({
+			type: "progress",
+			message: "Checking FurnitureData.json for spriteId conflicts…",
+		});
+		try {
+			const furniData = (await readFurniData()) as Record<
+				string,
+				{ furnitype: Array<Record<string, unknown>> }
+			>;
+			// Build map of id → classname from both sections
+			const idToClassname = new Map<number, string>();
+			for (const section of ["roomitemtypes", "wallitemtypes"] as const) {
+				for (const e of furniData[section]?.furnitype ?? []) {
+					const id = Number(e?.id);
+					const classname = typeof e?.classname === "string" ? e.classname : "";
+					if (!Number.isFinite(id) || id <= 0 || !classname) continue;
+					const existing = idToClassname.get(id);
+					if (existing && existing !== classname) {
+						// Conflict: same id used by different classname
+						furniDataIdConflicts.push({
+							classname,
+							itemId: id,
+							conflictingId: id,
+							existingClassname: existing,
+						});
+					} else if (!existing) {
+						idToClassname.set(id, classname);
+					}
+				}
+			}
+			// Remove duplicates (same classname + id pair counted once)
+			const seen = new Set<string>();
+			furniDataIdConflicts = furniDataIdConflicts.filter((c) => {
+				const key = `${c.classname}:${c.conflictingId}`;
+				if (seen.has(key)) return false;
+				seen.add(key);
+				return true;
+			});
+		} catch (err) {
+			onEvent?.({
+				type: "error",
+				message: `FurnitureData id check failed: ${(err as Error).message}`,
+			});
+		}
+	}
+
 	onEvent?.({ type: "progress", message: "Comparing with clone sources…" });
 
 	const sources = await listSources();
@@ -811,6 +868,7 @@ export async function runCatalogAudit(
 		duplicatesMerged,
 		duplicateRowsRemoved,
 		remappedReferences,
+		furniDataIdConflicts: furniDataIdConflicts.length,
 	};
 
 	onEvent?.({

src/lib/services/furni-data.ts

@@ -106,6 +106,77 @@ async function acquireDiskLock(lockPath: string): Promise<void> {
 	}
 }
 
+/** Build a map of sprite id → classname from both sections of the furnidata.
+ *  If multiple entries share the same id, the first encountered classname wins. */
+function furniDataIdOwners(
+	data: Record<string, { furnitype: Array<Record<string, unknown>> }>,
+): Map<number, string> {
+	const owners = new Map<number, string>();
+	for (const section of ["roomitemtypes", "wallitemtypes"] as const) {
+		for (const e of data[section]?.furnitype ?? []) {
+			const id = Number(e?.id);
+			if (!Number.isFinite(id) || id <= 0) continue;
+			const classname = typeof e?.classname === "string" ? e.classname : "";
+			if (!classname) continue;
+			if (!owners.has(id)) owners.set(id, classname);
+		}
+	}
+	return owners;
+}
+
+/** Assert that no entry in `entries` has a spriteId already used by a different classname
+ *  in the existing furnidata or within this batch.  Throws if a conflict is found. */
+function assertNoFurniDataIdConflicts(
+	existingOwners: Map<number, string>,
+	entries: Array<{ entry: Record<string, unknown>; itemType: string }>,
+): void {
+	const conflicts: string[] = [];
+	for (const { entry } of entries) {
+		const id = Number(entry?.id);
+		if (!Number.isFinite(id) || id <= 0) continue;
+		const classname =
+			typeof entry?.classname === "string" ? entry.classname : "";
+		const existing = existingOwners.get(id);
+		if (existing !== undefined && existing !== classname) {
+			conflicts.push(
+				`spriteId ${id} already used by "${existing}" in FurnitureData.json ` +
+					`(attempted "${classname}")`,
+			);
+			continue;
+		}
+		// reserve the id within this batch so a second entry with the same id + different classname
+		// is also caught (even though the file hasn't been written yet).
+		existingOwners.set(id, classname);
+	}
+	if (conflicts.length > 0) {
+		throw new Error(
+			`FurnitureData spriteId conflicts: ${conflicts.join("; ")}`,
+		);
+	}
+}
+
+/** Check if a spriteId is already used by a different classname in the local
+ *  FurnitureData.json. Returns the existing classname if there's a conflict,
+ *  or null if the spriteId is free or the file couldn't be read. */
+export async function findFurniDataIdConflict(
+	spriteId: number,
+	classname: string,
+): Promise<string | null> {
+	try {
+		const furniData = await readFurniData();
+		const owners = furniDataIdOwners(
+			furniData as Record<
+				string,
+				{ furnitype: Array<Record<string, unknown>> }
+			>,
+		);
+		const existing = owners.get(spriteId);
+		return existing !== undefined && existing !== classname ? existing : null;
+	} catch {
+		return null; // if file missing/unreadable, treat as no conflict
+	}
+}
+
 export async function withFurniDataLock<T>(fn: () => Promise<T>): Promise<T> {
 	let release!: () => void;
 	const acquired = new Promise<void>((r) => {
@@ -228,6 +299,11 @@ export async function appendFurniEntry(
 			string,
 			{ furnitype: Array<Record<string, unknown>> }
 		>;
+
+		// Guard: ensure the spriteId is not already used by a different classname in the file.
+		const existingOwners = furniDataIdOwners(furniData);
+		assertNoFurniDataIdConflicts(existingOwners, [{ entry, itemType }]);
+
 		if (itemType === "i") {
 			if (!furniData.wallitemtypes) furniData.wallitemtypes = { furnitype: [] };
 			upsertEntryInSection(furniData.wallitemtypes, entry);
@@ -331,6 +407,17 @@ export async function appendFurniEntriesBatch(
 			string,
 			{ furnitype: unknown[] }
 		>;
+
+		// Guard: ensure no spriteId conflicts with existing file entries
+		// or within this batch (same id + different classname).
+		const existingOwners = furniDataIdOwners(
+			furniData as Record<
+				string,
+				{ furnitype: Array<Record<string, unknown>> }
+			>,
+		);
+		assertNoFurniDataIdConflicts(existingOwners, entries);
+
 		for (const { entry, itemType } of entries) {
 			if (itemType === "i") {
 				if (!furniData.wallitemtypes)

src/lib/services/furni-import.test.ts

@@ -11,6 +11,7 @@ vi.mock("@/lib/services/furni-data", () => ({
 	appendFurniEntry: vi.fn(),
 	buildFurniEntry: vi.fn(),
 	removeFurniEntry: vi.fn(),
+	findFurniDataIdConflict: vi.fn(),
 }));
 
 vi.mock("@/lib/services/habbo-furnidata-cache", () => ({

src/lib/services/furni-import.ts

@@ -14,6 +14,7 @@ import {
 import {
 	appendFurniEntry,
 	buildFurniEntry,
+	findFurniDataIdConflict,
 	removeFurniEntry,
 } from "@/lib/services/furni-data";
 import {
@@ -472,6 +473,16 @@ export async function importSingleFurni(params: {
 		};
 	}
 
+	// ── Check if spriteId already used in FurnitureData.json ──
+	const takenBy = await findFurniDataIdConflict(originalId, classname);
+	if (takenBy) {
+		return {
+			ok: false,
+			warnings,
+			error: `spriteId ${originalId} already used by "${takenBy}" in FurnitureData.json`,
+		};
+	}
+
 	const itemType = type === "wallitem" ? "i" : "s";
 	const spriteId = originalId;