fix(components): improve generic types (#3331)

Co-authored-by: Benjamin Canac <canacb1@gmail.com>

docs/app/components/content/examples/tabs/TabsCustomSlotExample.vue

@@ -1,18 +1,20 @@
 <script setup lang="ts">
+import type { TabsItem } from '@nuxt/ui'
+
 const items = [
   {
     label: 'Account',
     description: 'Make changes to your account here. Click save when you\'re done.',
     icon: 'i-lucide-user',
-    slot: 'account'
+    slot: 'account' as const
   },
   {
     label: 'Password',
     description: 'Change your password here. After saving, you\'ll be logged out.',
     icon: 'i-lucide-lock',
-    slot: 'password'
+    slot: 'password' as const
   }
-]
+] satisfies TabsItem[]
 
 const state = reactive({
   name: 'Benjamin Canac',