fix(plugin-nuxt): remove useNuxtApp mock in nuxt plugin preventing some behaviors (fix #703)

[juleshry]

Description

This PR fixes the issue #703. This bug comes from the useNuxtApp that is mocked in /packages/histoire-plugin-nuxt/runtime/composables.mjs
It just removes this mock to use the useNuxtApp version from Nuxt. It allows some plugins that requires data from useNuxtApp to run correctly (e.g. @nuxtjs/i18n).

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What is the purpose of this pull request?

• Bug fix
• New Feature
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[gjeusel]

Hey there ! I believe there must be a reason why the author decided to entirely mock the useNuxtApp (altough I don't understand it).
Entirely removing the mocked useNuxtApp make histoire fail on my side, not at nuxt build time, but at runtime with a Failed to fetch dynamically imported module from @histoire/plugin-vue.

Maybe a better solution might be to just inline the actual nuxt config in the useNuxtApp composable ?

diff --git a/packages/histoire-plugin-nuxt/runtime/composables.mjs b/packages/histoire-plugin-nuxt/runtime/composables.mjs
deleted file mode 100644
index 9b9a4d8..0000000
--- a/packages/histoire-plugin-nuxt/runtime/composables.mjs
+++ /dev/null
@@ -1 +0,0 @@
-export const useNuxtApp = () => ({ runWithContext: async fn => await fn() })
diff --git a/packages/histoire-plugin-nuxt/src/index.ts b/packages/histoire-plugin-nuxt/src/index.ts
index b284eea..ca3cc8f 100644
--- a/packages/histoire-plugin-nuxt/src/index.ts
+++ b/packages/histoire-plugin-nuxt/src/index.ts
@@ -135,7 +135,17 @@ async function useNuxtViteConfig() {
   }
   const runtimeDir = fileURLToPath(new URL('../runtime', import.meta.url))
   nuxt.options.build.templates.push(
-    { src: join(runtimeDir, 'composables.mjs'), filename: 'histoire/composables.mjs' },
+    {
+      async getContents() {
+        return `
+            export const useNuxtApp = () => ({
+              runWithContext: async (fn) => await fn(),
+              $config: ${JSON.stringify(nuxt.options.runtimeConfig)},
+            })
+        `
+      },
+      filename: "histoire/composables.mjs",
+    },
     { src: join(runtimeDir, 'components.mjs'), filename: 'histoire/components.mjs' },
   )

[juleshry]

Hey @gjeusel,
Thanks for your comment !
It's weird that it doesn't work on your side, maybe our config is not entirely the same.
I think your solution would work fine. But I would like to have some feedback from the team because I don't understand why they want to mock it either.