Add typecheck

shared/utils/slugcheck.ts

@@ -1,4 +1,4 @@
-import type { RouteParamsGeneric } from '#vue-router';
+import type { RouteParamsGeneric } from 'vue-router';
 
 export type Slug = { name: string; id: number };
 export type SlugRecord = Record<string, Slug>;
@@ -16,12 +16,13 @@ export function parseSlug(slug: string): null | Slug {
   const { name, id } = result.groups!;
 
   return {
-    name: name
-      .substring(0, name.length - 1)
-      .split('-')
-      .map((w) => `${w.substring(0, 1).toUpperCase()}${w.substring(1)}`)
-      .join(' '),
-    id: parseInt(id)
+    name:
+      name
+        ?.substring(0, name.length - 1)
+        .split('-')
+        .map((w) => `${w.substring(0, 1).toUpperCase()}${w.substring(1)}`)
+        .join(' ') ?? '',
+    id: parseInt(id!)
   };
 }