fix(script): detect runtime Unhead capabilities

Author: harlan-zw

packages/script/src/module.ts

@@ -609,7 +609,9 @@ export default defineNuxtModule<ModuleOptions>({
 }
 // If Unhead cannot be resolved, retain the compatibility implementation.
 constunheadPackagePath=awaitresolvePackageJSON('@unhead/vue',{
-from: nuxt.options.modulesDir,
+// Match the package instance imported by the built runtime. An app can
+// contain another Unhead version with different loader capabilities.
+from: [resolveModule('./runtime')],
 }).catch(()=>{
 // @unhead/vue is optional; unresolved installs use the local compatibility path.
 returnnull