Fixed all type issues that were flagged in the IDE

frontend/pages/app/[appSlug]/[pageSlug]/[recordId].vue

@@ -39,9 +39,9 @@ const appSlug = computed(() => route.params.appSlug as string)
 const pageSlug = computed(() => route.params.pageSlug as string)
 const recordId = computed(() => route.params.recordId as string)
 
-const record = ref(null)
+const record = ref<any>(null)
 const loading = ref(true)
-const error = ref(null)
+const error = ref<string | null>(null)
 const objectApiName = ref('')
 
 const fetchRecord = async () => {