Broken unde rune only mode

[Rezi]

Describe the bug

When

compilerOptions: {
   runes: true
}, 

the Inspector break the app by error:
$: is not allowed in runes mode, use $derived or $effect instead

it is because of code in the inspector itself which use the old syntax

$: show_toggle =
		options.showToggleButton === 'always' || (options.showToggleButton === 'active' && enabled);

Reproduction URL

https://vitejsvitevmqgm2-vt4k--5173--34c588ed.local-credentialless.webcontainer.io

Reproduction

No response

Logs

[plugin:vite-plugin-svelte] node_modules/.pnpm/@sveltejs+vite-plugin-svelte-inspector@3.0.0_@sveltejs+vite-plugin-svelte@4.0.0_svelte@5.0.5_vite@5.4.10/node_modules/@sveltejs/vite-plugin-svelte-inspector/src/runtime/Inspector.svelte:35:1 `$:` is not allowed in runes mode, use `$derived` or `$effect` instead
node_modules/.pnpm/@sveltejs+vite-plugin-svelte-inspector@3.0.0_@sveltejs+vite-plugin-svelte@4.0.0_svelte@5.0.5_vite@5.4.10/node_modules/@sveltejs/vite-plugin-svelte-inspector/src/runtime/Inspector.svelte:35:1
33 |    let hold_start_ts;
 34 |  
 35 |    $: show_toggle =
                         ^
 36 |      // eslint-disable-next-line svelte/valid-compile
 37 |      options.showToggleButton === 'always' || (options.showToggleButton === 'active' && enabled);

System Info

System:
    OS: macOS 14.5
    CPU: (8) arm64 Apple M1 Pro
    Memory: 336.77 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.11.1 - ~/.nvm/versions/node/v20.11.1/bin/node
    npm: 10.2.4 - ~/.nvm/versions/node/v20.11.1/bin/npm
    pnpm: 8.14.0 - ~/Library/pnpm/pnpm
  Browsers:
    Brave Browser: 130.1.71.114
    Chrome: 130.0.6723.59
    Chrome Canary: 132.0.6792.0
    Firefox Nightly: 131.0a1
    Safari: 17.5
    Safari Technology Preview: 18.0
  npmPackages:
    @sveltejs/adapter-auto: ^3.3.0 => 3.3.0 
    @sveltejs/adapter-static: ^3.0.5 => 3.0.5 
    @sveltejs/kit: ^2.7.2 => 2.7.2 
    @sveltejs/vite-plugin-svelte: ^4.0.0 => 4.0.0 
    svelte: ^5.0.5 => 5.0.5 
    vite: ^5.4.10 => 5.4.10

[dominikg]

workaround:

// svelte.config.js
export default {
  vitePlugin: {
    dynamicCompileOptions({filename}) =>({runes: filename.includes('node_modules') ? undefined: true })
  }
}

technically svelte-inspector is a dependency and you don't want to enable runes mode for files in node_modules unless the library is already updated to svelte5. I'll release a patch shortly that changes inspector to use runes, as the current release requires svelte5 already.