test: enable type checking of app tests (npmx-dev#747)

Author: 43081j

nuxt.config.ts

@@ -246,7 +246,9 @@ export default defineNuxtConfig({
     tsConfig: {
       compilerOptions: {
         noUnusedLocals: true,
+        allowImportingTsExtensions: true,
       },
+      include: ['../test/unit/app/**/*.ts'],
     },
     sharedTsConfig: {
       include: ['../test/unit/shared/**/*.ts'],