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+

next.config.ts

@@ -52,8 +52,6 @@ const nextConfig: NextConfig = {
 		ignoreBuildErrors: false,
 	},
 
-	// Enable React Compiler for automatic memoization
-
 	// Compress responses with gzip/brotli
 	compress: true,
 

package.json

@@ -7,7 +7,7 @@
 	},
 	"packageManager": "[email protected]",
 	"scripts": {
-		"dev": "next dev --turbo",
+		"dev": "next dev",
 		"build": "next build",
 		"start": "next start",
 		"lint": "biome check .",
@@ -30,8 +30,8 @@
 		"@dnd-kit/core": "6.3.1",
 		"@dnd-kit/sortable": "10.0.0",
 		"@dnd-kit/utilities": "3.2.2",
-		"@hookform/resolvers": "5.7.1",
+		"@hookform/resolvers": "5.8.0",
-		"@next/bundle-analyzer": "16.3.0",
+		"@next/bundle-analyzer": "16.3.1",
 		"@tanstack/react-virtual": "3.14.9",
 		"class-variance-authority": "0.7.1",
 		"clsx": "2.1.1",
@@ -50,7 +50,7 @@
 		"motion": "13.1.0",
 		"music-metadata": "11.14.0",
 		"mysql2": "3.23.3",
-		"next": "16.3.0",
+		"next": "16.3.1",
 		"next-auth": "5.0.0-beta.32",
 		"next-intl": "4.13.6",
 		"otplib": "13.4.1",
@@ -58,7 +58,7 @@
 		"react": "19.2.8",
 		"react-dom": "19.2.8",
 		"react-hook-form": "7.85.0",
-		"resend": "6.19.0",
+		"resend": "6.20.0",
 		"server-only": "0.0.1",
 		"sharp": "0.35.3",
 		"sonner": "2.0.8",

pnpm-lock.yaml

@@ -35,11 +35,11 @@ importers:
         specifier: 3.2.2
         version: 3.2.2([email protected])
       '@hookform/resolvers':
-        specifier: 5.7.1
+        specifier: 5.8.0
-        version: 5.7.1(@standard-schema/[email protected])([email protected]([email protected]))([email protected])
+        version: 5.8.0(@standard-schema/[email protected])([email protected]([email protected]))([email protected])
       '@next/bundle-analyzer':
-        specifier: 16.3.0
+        specifier: 16.3.1
-        version: 16.3.0
+        version: 16.3.1
       '@tanstack/react-virtual':
         specifier: 3.14.9
         version: 3.14.9([email protected]([email protected]))([email protected])
@@ -95,14 +95,14 @@ importers:
         specifier: 3.23.3
         version: 3.23.3(@types/[email protected])
       next:
-        specifier: 16.3.0
+        specifier: 16.3.1
-        version: 16.3.0(@types/[email protected])([email protected]([email protected]))([email protected])
+        version: 16.3.1(@types/[email protected])([email protected]([email protected]))([email protected])
       next-auth:
         specifier: 5.0.0-beta.32
-        version: 5.0.0-beta.32([email protected].0(@types/[email protected])([email protected]([email protected]))([email protected]))([email protected])
+        version: 5.0.0-beta.32([email protected].1(@types/[email protected])([email protected]([email protected]))([email protected]))([email protected])
       next-intl:
         specifier: 4.13.6
-        version: 4.13.6([email protected].0(@types/[email protected])([email protected]([email protected]))([email protected]))([email protected])([email protected])
+        version: 4.13.6(@swc/[email protected])([email protected].1(@types/[email protected])([email protected]([email protected]))([email protected]))([email protected])([email protected])
       otplib:
         specifier: 13.4.1
         version: 13.4.1
@@ -119,8 +119,8 @@ importers:
         specifier: 7.85.0
         version: 7.85.0([email protected])
       resend:
-        specifier: 6.19.0
+        specifier: 6.20.0
-        version: 6.19.0
+        version: 6.20.0
       server-only:
         specifier: 0.0.1
         version: 0.0.1
@@ -559,8 +559,8 @@ packages:
   '@formatjs/[email protected]':
     resolution: {integrity: sha512-kHEAFOkeJSPNi7c5PaKaRjxcBrJwzzt81ifUu+8uve1EDW/VJl83KsxmqgqNZLzcFEhSliZGvx3+pk/RH0IOmg==}
 
-  '@hookform/resolvers@5.7.1':
+  '@hookform/resolvers@5.8.0':
-    resolution: {integrity: sha512-8wS/P4UDr5sQDe4nFaV51TVyfDPrWgNIXweqG0Bs9Z5LSuzKLb+RQNPvkN2oHM5SRrJyWrVH/F+LOUcFjUyvwQ==}
+    resolution: {integrity: sha512-2m6GvRLmYYK1Fwt093lGMf7db9l/+8pNuAtwoNkpBntJT4xcA5lNthYGWKViOc3z2SuaPD0HjE81pyXmqc1JyA==}
     peerDependencies:
       '@sinclair/typebox': '>=0.25.24'
       '@standard-schema/spec': ^1.0.0
@@ -584,7 +584,7 @@ packages:
       superstruct: '>=0.12.0'
       typanion: ^3.3.2
       valibot: '>=0.31.0 || ^1.0.0-beta.4 || ^1.0.0-rc'
-      vest: '>=3.0.0'
+      vest: '>=6.0.0'
       yup: ^1.0.0
       zod: ^3.25.0 || ^4.0.0
     peerDependenciesMeta:
@@ -825,60 +825,60 @@ packages:
       '@emnapi/core': ^1.7.1 || ^2.0.0-alpha.4
       '@emnapi/runtime': ^1.7.1 || ^2.0.0-alpha.4
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
-    resolution: {integrity: sha512-o8OiXKIATcSC6kHm5BIEmaDEDTFUDhpy9POQIbzAQTlb8NWwFhEQheTLFSbyQXxH2ywhjZ/e8EUlbOjj2k22Yg==}
+    resolution: {integrity: sha512-/6XQeYPHM6jF1gTeJ82Mu6yXOHQIFVxzAn3DkPtHDp5v6SDXoCicBMTHloN+2h4WKFCQujSLCgLZHItJ3jN1uw==}
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
-    resolution: {integrity: sha512-o9r1S0BNiNreHP9Vs+Qnqd9kviDkJh8xIACY7UFZSmiGbbQRzPBBosvHzAU4TULHOIuOj/18RSsyz2qrREmIFw==}
+    resolution: {integrity: sha512-35G3xwkQUb2oETSDjFXGrVugknoayLFBh7vSE+yAcl9IP2zT9wyGwq7297AYHR11kJld807t5f8AJBs6WBzXsQ==}
 
-  '@next/[email protected].0':
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     engines: {node: '>= 10'}
     cpu: [arm64]
     os: [darwin]
 
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     engines: {node: '>= 10'}
     cpu: [x64]
     os: [darwin]
 
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     engines: {node: '>= 10'}
     cpu: [arm64]
     os: [linux]
     libc: [glibc]
 
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-    resolution: {integrity: sha512-tXXGKJw0m37O0eKJARVTX/TheKPhz0QFVtVVZXmOig+9YKLQOSP6hvf2pxv5DO7CLEJyTHx3Pg043CDQkv1G4Q==}
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     engines: {node: '>= 10'}
     cpu: [arm64]
     os: [linux]
     libc: [musl]
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
-    resolution: {integrity: sha512-pjGxK5EY7yWml78ALejFkWmgHsU7wbFQrISiugpH6FbUJhgEvw3xFZ/EBAtLl7QtL0WdQKiG9eWJ3mOKGTukHw==}
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     engines: {node: '>= 10'}
     cpu: [x64]
     os: [linux]
     libc: [glibc]
 
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+  '@next/[email protected].1':
-    resolution: {integrity: sha512-sjo++Xx+lomlPs3HRsHWhVDyGG6ms1kGW5EtHLERdII8AyG1i+f6aq68xHREO6AEMlhjTNEWBSmfJfqm9orf7g==}
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     engines: {node: '>= 10'}
     cpu: [x64]
     os: [linux]
     libc: [musl]
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
-    resolution: {integrity: sha512-C5JSgiO54wURdaxdEUIXqkz04uMqC9UmPX1gtDrV/5Tf1UowdWYI8uA5hfFbPolTlp0q4KZ60xlHePNibf0VIw==}
+    resolution: {integrity: sha512-iOoN1QecUoGNZik536U/vtK43YwgyrCsGIkth52yIkl612n+0C9MjSnJbQAikISpb+WYRooBVhaDlUW7iZoKog==}
     engines: {node: '>= 10'}
     cpu: [arm64]
     os: [win32]
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
-    resolution: {integrity: sha512-fDOggsweNb5SSw0ZKVk6U+gxSyGFFlIBY/LBc1r8GUj4u/6t6oArL+Pmkg0MBnsgR+KkdsURilVH4F3GXUGepA==}
+    resolution: {integrity: sha512-d/k+PpAriUPaeMJJOG7HUSdqfEX46FEPWU1p3/nm2ACmXhj9hFEWdFODUBIpkuijXYkfL90qZzTqVPRp4BW/hw==}
     engines: {node: '>= 10'}
     cpu: [x64]
     os: [win32]
@@ -1584,8 +1584,8 @@ packages:
   '@swc/[email protected]':
     resolution: {integrity: sha512-e2BR4lsJkkRlKZ/qCHPw9ZaSxc0MVUd7gtbtaB7aMvHeJVYe8sOB8DBZkP2DtISHGSku9sCK6T6cnY0CtXrOCQ==}
 
-  '@swc/[email protected].15':
+  '@swc/[email protected].23':
-    resolution: {integrity: sha512-JQ5TuMi45Owi4/BIMAJBoSQoOJu12oOk/gADqlcUL9JEdHB8vyjUSsxqeNXnmXHjYKMi2WcYtezGEEhqUI/E2g==}
+    resolution: {integrity: sha512-5lSsMOTXURePglDfvuAQUqkGek9Hg2kksOYay2m0+XR++b2NWYL/4sWyuvVBIs8oKnJaxkdi9whaL/sqN13afw==}
 
   '@swc/[email protected]':
     resolution: {integrity: sha512-V6Mnml8v09QALx6K0elJ7o9K/MkVDtW3t6L+7Ou/JcWtb3xwId2AH4FeOceySd2JaO87IMw4+6vSZxLm34LPbw==}
@@ -2583,8 +2583,8 @@ packages:
       typescript:
         optional: true
 
-  [email protected].0:
+  [email protected].1:
-    resolution: {integrity: sha512-NEdGOzH+08eTXMUp9UYkA99Nhi5N6Thrhc1jgFOQgfgnGK/dA2hRwBpXep+exdFQrnwlRf/3Wixyp8lLBUpE2A==}
+    resolution: {integrity: sha512-hsAp0i7Rh+/dhe7DGIeN2YlpLM1DP4MNxti9EtDMtqcO612X81MvvEj388/oTce9U1EcEIOWDlGq0zRwrBKvuA==}
     engines: {node: '>=20.9.0'}
     hasBin: true
     peerDependencies:
@@ -2758,8 +2758,8 @@ packages:
   [email protected]:
     resolution: {integrity: sha512-AgZ3UOZm3YndfrJ4OYjgrT7bmCm/1iqkjvEfH/oYjzh6PD2qw4QuT3jjnXIrpdt4MTpMXclMT3lXbmRY+XRakw==}
 
-  resend@6.19.0:
+  resend@6.20.0:
-    resolution: {integrity: sha512-JnEdYnd9WyBDIzunsEZtUF8n3cBKM9SlmySaos/7wwi4sEXKG1Zz4M64VFAyk+278erX01Fq2wHQ3p7OIdPriA==}
+    resolution: {integrity: sha512-fXDFt7jVMuka6ruS79DzaQFKPyxOAUtoYUGSl3dTUyOnFK9klmUULxADQRzFFtHfHRipYyy62jYcm4cMKqvtjw==}
     engines: {node: '>=20'}
     peerDependencies:
       '@react-email/render': '*'
@@ -3372,7 +3372,7 @@ snapshots:
     dependencies:
       '@formatjs/fast-memoize': 3.1.7
 
-  '@hookform/resolvers@5.7.1(@standard-schema/[email protected])([email protected]([email protected]))([email protected])':
+  '@hookform/resolvers@5.8.0(@standard-schema/[email protected])([email protected]([email protected]))([email protected])':
     dependencies:
       '@standard-schema/utils': 0.3.0
       react-hook-form: 7.85.0([email protected])
@@ -3514,37 +3514,37 @@ snapshots:
       '@tybys/wasm-util': 0.10.3
     optional: true
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
     dependencies:
       webpack-bundle-analyzer: 4.10.1
     transitivePeerDependencies:
       - bufferutil
       - utf-8-validate
 
-  '@next/[email protected].0': {}
+  '@next/[email protected].1': {}
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
     optional: true
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
     optional: true
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
     optional: true
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
     optional: true
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
     optional: true
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
     optional: true
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
     optional: true
 
-  '@next/[email protected].0':
+  '@next/[email protected].1':
     optional: true
 
   '@noble/[email protected]': {}
@@ -3985,7 +3985,7 @@ snapshots:
   '@swc/[email protected]':
     optional: true
 
-  '@swc/[email protected]':
+  '@swc/[email protected](@swc/[email protected])':
     dependencies:
       '@swc/counter': 0.1.3
       '@swc/types': 0.1.28
@@ -4002,10 +4002,11 @@ snapshots:
       '@swc/core-win32-arm64-msvc': 1.15.47
       '@swc/core-win32-ia32-msvc': 1.15.47
       '@swc/core-win32-x64-msvc': 1.15.47
+      '@swc/helpers': 0.5.23
 
   '@swc/[email protected]': {}
 
-  '@swc/[email protected].15':
+  '@swc/[email protected].23':
     dependencies:
       tslib: 2.8.1
 
@@ -4753,22 +4754,22 @@ snapshots:
 
   [email protected]: {}
 
-  [email protected]([email protected].0(@types/[email protected])([email protected]([email protected]))([email protected]))([email protected]):
+  [email protected]([email protected].1(@types/[email protected])([email protected]([email protected]))([email protected]))([email protected]):
     dependencies:
       '@auth/core': 0.41.3
-      next: 16.3.0(@types/[email protected])([email protected]([email protected]))([email protected])
+      next: 16.3.1(@types/[email protected])([email protected]([email protected]))([email protected])
       react: 19.2.8
 
   [email protected]: {}
 
-  [email protected]([email protected].0(@types/[email protected])([email protected]([email protected]))([email protected]))([email protected])([email protected]):
+  [email protected](@swc/[email protected])([email protected].1(@types/[email protected])([email protected]([email protected]))([email protected]))([email protected])([email protected]):
     dependencies:
       '@formatjs/intl-localematcher': 0.8.13
       '@parcel/watcher': 2.6.0
-      '@swc/core': 1.15.47
+      '@swc/core': 1.15.47(@swc/[email protected])
       icu-minify: 4.13.6
       negotiator: 1.0.0
-      next: 16.3.0(@types/[email protected])([email protected]([email protected]))([email protected])
+      next: 16.3.1(@types/[email protected])([email protected]([email protected]))([email protected])
       next-intl-swc-plugin-extractor: 4.13.6
       po-parser: 2.1.1
       react: 19.2.8
@@ -4778,10 +4779,10 @@ snapshots:
     transitivePeerDependencies:
       - '@swc/helpers'
 
-  [email protected].0(@types/[email protected])([email protected]([email protected]))([email protected]):
+  [email protected].1(@types/[email protected])([email protected]([email protected]))([email protected]):
     dependencies:
-      '@next/env': 16.3.0
+      '@next/env': 16.3.1
-      '@swc/helpers': 0.5.15
+      '@swc/helpers': 0.5.23
       baseline-browser-mapping: 2.11.13
       caniuse-lite: 1.0.30001809
       postcss: 8.5.26
@@ -4789,14 +4790,14 @@ snapshots:
       react-dom: 19.2.8([email protected])
       styled-jsx: 5.1.6([email protected])
     optionalDependencies:
-      '@next/swc-darwin-arm64': 16.3.0
+      '@next/swc-darwin-arm64': 16.3.1
-      '@next/swc-darwin-x64': 16.3.0
+      '@next/swc-darwin-x64': 16.3.1
-      '@next/swc-linux-arm64-gnu': 16.3.0
+      '@next/swc-linux-arm64-gnu': 16.3.1
-      '@next/swc-linux-arm64-musl': 16.3.0
+      '@next/swc-linux-arm64-musl': 16.3.1
-      '@next/swc-linux-x64-gnu': 16.3.0
+      '@next/swc-linux-x64-gnu': 16.3.1
-      '@next/swc-linux-x64-musl': 16.3.0
+      '@next/swc-linux-x64-musl': 16.3.1
-      '@next/swc-win32-arm64-msvc': 16.3.0
+      '@next/swc-win32-arm64-msvc': 16.3.1
-      '@next/swc-win32-x64-msvc': 16.3.0
+      '@next/swc-win32-x64-msvc': 16.3.1
       sharp: 0.35.3(@types/[email protected])
     transitivePeerDependencies:
       - '@babel/core'
@@ -5004,7 +5005,7 @@ snapshots:
 
   [email protected]: {}
 
-  resend@6.19.0:
+  resend@6.20.0:
     dependencies:
       postal-mime: 2.7.5
       standardwebhooks: 1.0.0

src/actions/admin-ads.ts

@@ -7,7 +7,6 @@ import { redirect } from "next/navigation";
 import { z } from "zod";
 import { requirePermission } from "@/lib/admin/guard";
 import { db, WebsiteAds } from "@/lib/db";
-import { formPositiveBigInt } from "@/lib/form-data";
 import { logger } from "@/lib/logger";
 import { PERMS } from "@/lib/permissions";
 import { adminAction } from "@/lib/safe-action";
@@ -117,28 +116,3 @@ export const deleteAd = adminAction(
 		return actionOk();
 	},
 );
-
-/** Legacy form POST delete — kept for compatibility; prefer client deleteAd action. */
-export async function deleteAdForm(formData: FormData): Promise<void> {
-	const staff = await requirePermission(PERMS.PAGES_EDIT);
-	const id = formPositiveBigInt(formData, "id");
-	if (!id) return;
-
-	try {
-		await db.delete(WebsiteAds).where(eq(WebsiteAds.id, id));
-		await logStaffActivity({
-			staffId: staff.id,
-			action: "ad_delete",
-			description: `Deleted advertisement #${id}`,
-			targetType: "website_ad",
-			targetId: Number(id),
-		});
-	} catch (err) {
-		logger.error("Action failed: deleteAdForm", {
-			action: "deleteAdForm",
-			id: Number(id),
-			error: err instanceof Error ? err.message : "DB error",
-		});
-	}
-	redirect("/admin/ads");
-}

src/app/admin/import/audit/audit-client.tsx

@@ -155,6 +155,7 @@ export function AuditClient() {
 	const [applySql, setApplySql] = useState(false);
 	const [repairFurniData, setRepairFurniData] = useState(false);
 	const [repairStructure, setRepairStructure] = useState(false);
+	const [checkFurniDataIds, setCheckFurniDataIds] = useState(false);
 
 	const [issues, setIssues] = useState<AuditIssue[]>([]);
 	const [missingFromSources, setMissingFromSources] = useState<
@@ -421,6 +422,13 @@ export function AuditClient() {
 					>
 						Repair FurnitureData.json (add missing + dedupe)
 					</AuditCheckbox>
+					<AuditCheckbox
+						checked={checkFurniDataIds}
+						disabled={loading}
+						onChange={setCheckFurniDataIds}
+					>
+						Check FurnitureData.json for spriteId conflicts
+					</AuditCheckbox>
 					<AuditCheckbox
 						checked={repairStructure}
 						disabled={loading}

src/app/api/admin/import/audit/route.ts

@@ -18,6 +18,7 @@ export const POST = withAdmin(
 		let applySql = false;
 		let repairFurniData = false;
 		let repairStructure = false;
+		let checkFurniDataIds = false;
 		try {
 			const body = (await request.json().catch(() => ({}))) as {
 				repair?: unknown;
@@ -26,6 +27,7 @@ export const POST = withAdmin(
 				applySql?: unknown;
 				repairFurniData?: unknown;
 				repairStructure?: unknown;
+				checkFurniDataIds?: unknown;
 			};
 			repair = body.repair === true;
 			repairNitros = body.repairNitros === true;
@@ -33,6 +35,7 @@ export const POST = withAdmin(
 			applySql = body.applySql === true;
 			repairFurniData = body.repairFurniData === true;
 			repairStructure = body.repairStructure === true;
+			checkFurniDataIds = body.checkFurniDataIds === true;
 		} catch (err) {
 			logger.warn("Failed to parse audit request body", { err });
 		}
@@ -55,6 +58,7 @@ export const POST = withAdmin(
 						applySql,
 						repairFurniData,
 						repairStructure,
+						checkFurniDataIds,
 					});
 				} catch (err) {
 					send({

src/components/auth/register-form.tsx

@@ -42,6 +42,7 @@ export function RegisterForm({
 	const showCaptcha = captcha.provider !== "none" && !!captcha.siteKey;
 	const [serverError, formAction, isPending] = useActionState(register, null);
 	const [termsAccepted, setTermsAccepted] = useState(false);
+	const [ageVerified, setAgeVerified] = useState(false);
 	const [password, setPassword] = useState("");
 	const [showPassword, setShowPassword] = useState(false);
 	const [showConfirm, setShowConfirm] = useState(false);
@@ -280,7 +281,7 @@ export function RegisterForm({
 					</div>
 				</div>
 
-				{/* Terms */}
+				{/* Terms & Age Verification */}
 				<div
 					className="rounded-xl p-4 flex flex-col gap-3"
 					style={{
@@ -314,6 +315,23 @@ export function RegisterForm({
 							{t("termsAccept", { hotel: hotelName })}
 						</label>
 					</div>
+					<div className="flex items-center gap-3 text-sm">
+						<input
+							type="checkbox"
+							id="ageVerified"
+							name="ageVerified"
+							checked={ageVerified}
+							onChange={(e) => setAgeVerified(e.target.checked)}
+							className="w-5 h-5 rounded border-2 accent-(--color-primary) shrink-0 cursor-pointer"
+						/>
+						<label
+							htmlFor="ageVerified"
+							className="font-semibold cursor-pointer select-none"
+							style={{ color: "var(--color-text-readable)" }}
+						>
+							{t("ageVerified", { hotel: hotelName })}
+						</label>
+					</div>
 				</div>
 
 				{/* Captcha */}

src/db/schema.ts

@@ -76,6 +76,8 @@ export const User = mysqlTable("users", {
 	homeRoom: int("home_room").notNull().default(0),
 	secretKey: varchar("secret_key", { length: 40 }),
 	pincode: varchar("pincode", { length: 11 }),
+	termsAccepted: boolean("terms_accepted").notNull().default(false),
+	ageVerified: boolean("age_verified").notNull().default(false),
 	extraRank: int("extra_rank"),
 	twoFactorSecret: text("two_factor_secret"),
 	twoFactorRecoveryCodes: text("two_factor_recovery_codes"),

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;
 

src/messages/nl.json

@@ -29,7 +29,7 @@
 	"header": {
 		"online": "{count} {hotel} online",
 		"nitroClient": "Nitro client",
-		"tagline": "Een online virtuele wereld waar je je eigen avatar kunt maken, vrienden kunt maken, kunt chatten, kamers kunt maken en nog veel meer!",
+		"tagline": "Een online virtuele wereld waar je je eigen avatar kunt maken, vrienden kunt maken, kunt chatten, kamers kunt maken en nog veel meer! Leeftijdsvereiste: 18+",
 		"login": "Inloggen",
 		"or": "Of",
 		"createAccount": "Account aanmaken"
@@ -919,6 +919,7 @@
 			"passwordError": "Wachtwoord moet minimaal 6 tekens bevatten.",
 			"confirmPasswordError": "Wachtwoorden komen niet overeen.",
 			"termsRequired": "Je moet de voorwaarden & regels accepteren.",
+			"ageVerified": "Ik ben 18+ en ga akkoord met de leeftijdsvereiste.",
 			"usernameRequired": "Gebruikersnaam is verplicht.",
 			"emailRequired": "E-mail is verplicht.",
 			"passwordRequired": "Wachtwoord is verplicht.",