Fixed all type issues that were flagged in the IDE

frontend/pages/setup/apps/[slug].vue

@@ -45,9 +45,9 @@
 const route = useRoute()
 const { api } = useApi()
 
-const app = ref(null)
+const app = ref<any>(null)
 const loading = ref(true)
-const error = ref(null)
+const error = ref<string | null>(null)
 
 const fetchApp = async () => {
   try {

frontend/pages/setup/apps/index.vue

@@ -106,9 +106,9 @@
 <script setup lang="ts">
 const { api } = useApi()
 
-const apps = ref([])
+const apps = ref<any[]>([])
 const loading = ref(true)
-const error = ref(null)
+const error = ref<string | null>(null)
 const showCreateForm = ref(false)
 const newApp = ref({
   slug: '',