vue/require-valid-default-prop error with TypeScript

[mrleblanc101]

Checklist

• I have tried restarting my IDE and the issue persists.
• I have read the FAQ and my problem is not listed.

Tell us about your environment

• ESLint version: 9.20.1
• eslint-plugin-vue version: 9.32.0
• Vue version: 3.5.13
• Node version: v20.18.0
• Operating System: macOS 15.3.1

Please show your full configuration:

import eslintConfigPrettier from 'eslint-config-prettier';
import prettierPlugin from 'eslint-plugin-prettier';
import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';

import withNuxt from './.playground/.nuxt/eslint.config.mjs';

export default withNuxt({
    plugins: {
        prettier: prettierPlugin,
    },
    rules: {
        ...prettierPlugin.configs.recommended.rules,
        ...eslintConfigPrettier.rules,
        ...eslintPluginPrettierRecommended.rules,
        'vue/no-bare-strings-in-template': [
            'error',
            {
                attributes: {
                    '/.+/': [
                        'title',
                        'description',
                        'label',
                        'help',
                        'tooltip',
                        'placeholder',
                        'errors',
                        'content',
                        'confirmButtonLabel',
                        'cancelButtonLabel',
                    ],
                    'UTab': ['name'],
                },
                directives: ['v-text'],
            },
        ],
        'vue/v-slot-style': ['error', 'shorthand'],
    },
}).append({
    files: ['.playground/**/*.vue'],
    rules: {
        'vue/no-bare-strings-in-template': 'off',
    },
});

What did you do?

<script lang="ts" setup>
type MaybeString<T extends number> = T | `${T}`;

const { level = 1 } = defineProps<{
    title: string;
    tooltip?: string;
    level?: MaybeString<1 | 2 | 3 | 4 | 5 | 6>;
}>();
</script>

What did you expect to happen?
No error

What actually happened?

Type of the default value for 'level' prop must be a string. eslintvue/require-valid-default-prop

Repository to reproduce this issue