fixed some type errors

src/routes/(angemeldet)/view/+page.server.ts

@@ -3,7 +3,7 @@ import { fail, redirect } from '@sveltejs/kit';
 
 /** @type {import('./$types').Actions} */
 export const actions = {
-	default: async ({ request }) => {
+	default: async ({ request }: {request: Request}) => {
 		const data = await request.formData();
 		const caseNumber = data.get('caseNumber');
 
@@ -15,7 +15,7 @@ export const actions = {
 			});
 		}
 
-		if (!(await caseNumberOccupied(caseNumber))) {
+		if (typeof caseNumber === 'string' && !(await caseNumberOccupied(caseNumber))) {
 			return fail(400, {
 				success: false,
 				caseNumber,