test: add and fix

test-workspace/tsc/passedFixtures/vue3/#4646/parent.vue

@@ -5,7 +5,7 @@ import child from './child.vue';
 import child2 from './child2.vue';
 
 const msg = ref<string | null>('test');
-const other = ref<string | null | undefined>('test2');
+const other = ref<string | null>('test2');
 </script>
 
 <template>

test-workspace/tsc/passedFixtures/vue3/#4822/main.vue

@@ -11,7 +11,7 @@ export default defineComponent({
 </script>
 
 <script setup lang="ts">
-let foo!: number | undefined;
+let foo!: number;
 </script>
 
 <template>

test-workspace/tsc/passedFixtures/vue3/#5227/comp.vue

@@ -0,0 +1,3 @@
+<script setup lang="ts">
+defineModel<string>();
+</script>

test-workspace/tsc/passedFixtures/vue3/#5227/main.vue

@@ -0,0 +1,12 @@
+<!-- @strictVModel true -->
+
+<script setup lang="ts">
+import Comp from './comp.vue';
+
+let foo!: string;
+</script>
+
+<template>
+    <!-- @vue-expect-error -->
+    <Comp v-model="foo" />
+</template>