eslint (with types) + svelte v5 fail?

seems like something is perhaps broken using svelte v5 with eslint rules (with type checking enabled):

(start with minimal app e.g. npx sv create foo (typescript + eslint))

minimally change eslint.config.js to add typed rules:

import js from '@eslint/js';import svelte from 'eslint-plugin-svelte';import globals from 'globals';import ts from 'typescript-eslint';export default ts.config(  {    ignores: ['*.config.js'],  },  js.configs.recommended,  ...ts.configs.recommendedTypeChecked, // *** changed  ...svelte.configs['flat/recommended'],  {    languageOptions: {      globals: {        ...globals.browser,        ...globals.node,      },      // *** ADDED      parserOptions: {        projectService: true,        tsconfigRootDir: import.meta.dirname,        extraFileExtensions: ['.svelte'],      },    },  },  {    files: ['**/*.svelte'],    languageOptions: {      parserOptions: {        parser: ts.parser,      },    },  },  {    ignores: ['build/', '.svelte-kit/', 'dist/'],  });

Although tsc has no problems (it knows the type of id is string, eslint doesn't seem to pick up sveltekit-generated types:

/routes/[id]/+server.ts:

BTW, this does work:

import { json } from '@sveltejs/kit';import type { RequestHandler } from './$types';export const GET: RequestHandler = ({ params: { id } }) => {  return json({ id });};

But shouldn't be necessary and is a regression in DX IMO. This all worked well in svelte 4 + eslint 8, but I don't know which upgrade causes this new problem.

Advice/help appreciated!