Zero-effort type safety not working in runes mode

[hanssonduck]

Describe the bug

Zero-effort type safety is not working with the next svelte preview.

Reproduction

Clone https://github.com/hanssonduck/svelte-props and install dependencies and run dev server. Open the index page and see runes props are not typed but exported data is.

Logs

No response

System Info

System:
    OS: macOS 14.4.1
    CPU: (8) arm64 Apple M1
    Memory: 2.75 GB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 21.7.3 - /opt/homebrew/bin/node
    npm: 10.5.0 - /opt/homebrew/bin/npm
    pnpm: 8.15.6 - /opt/homebrew/bin/pnpm
    bun: 1.1.3 - /opt/homebrew/bin/bun
  Browsers:
    Brave Browser: 123.1.64.116
    Safari: 17.4.1
  npmPackages:
    @sveltejs/adapter-auto: ^3.0.0 => 3.2.0
    @sveltejs/kit: ^2.0.0 => 2.5.5
    @sveltejs/vite-plugin-svelte: ^3.0.0 => 3.1.0
    svelte: ^5.0.0-next.1 => 5.0.0-next.100
    vite: ^5.0.3 => 5.2.8

Severity

annoyance

Additional Information

No response