`Uncaught TypeError` when `future.compatibilityVersion: 5` and loading third-party scripts via `@nuxt/scripts`.

[haakonmt]

Environment

Operating system	Linux 5.0 (Macintosh)
CPU	Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz (8 cores)
Node.js version	v22.22.0
nuxt/cli version	3.34.0
Package manager	pnpm@8.15.6
Nuxt version	4.4.2
Nitro version	2.13.2
Builder	vite@7.3.1
Config	compatibilityDate, devtools, future, modules
Modules	@nuxt/hints@1.0.2, @nuxt/scripts@0.13.2

Reproduction

https://stackblitz.com/edit/nuxt-starter-wyi5hapn

Describe the bug

When you have the following in your Nuxt config:

future: {
  compatibilityVersion: 5
},

and some third-party script is added via useScript or scripts.globals.[key], @nuxt/hints errors out with the following error:

Uncaught TypeError: can't access property "then", nuxtApp.callHook(...) is undefined
    NuxtJS 15
        onScriptAdded
        observer
        setup
        <anonymous>
        fn
        runWithContext
        callWithNuxt
        runWithContext
        run
        runWithContext
        applyPlugin
        executePlugin
        applyPlugins
        initApp
        <anonymous>
[plugin.client.js:96:15]

I wasn't able to reproduce it in the minimal repro, but in my app it actually throws me to the error page and breaks the app completely.

The reason is due to this change that results in callHook now being able to return void instead of always returning a promise.

A confirmed workaround is to set experimental.asyncCallHook: true in your Nuxt config, but this will inevitably break at some point.

Additional context

No response

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