fix(types): add missing ua types for NextRequest (#31901)

* fix(types): add missing ua type for NextRequest

add missing ua string type on NextRequest["ua"], returns full agent as string

* Update UserAgent type

Co-authored-by: JJ Kasper <jj@jjsweb.site>

packages/next/server/web/spec-extension/request.ts

@@ -1,5 +1,4 @@
 import type { I18NConfig } from '../../config-shared'
-import type { IResult } from 'next/dist/compiled/ua-parser-js'
 import type { RequestData } from '../types'
 import { NextURL } from '../next-url'
 import { isBot } from '../../utils'
@@ -110,6 +109,27 @@ export interface RequestInit extends globalThis.RequestInit {
   }
 }
 
-interface UserAgent extends IResult {
+interface UserAgent {
   isBot: boolean
+  ua: string
+  browser: {
+    name?: string
+    version?: string
+  }
+  device: {
+    model?: string
+    type?: string
+    vendor?: string
+  }
+  engine: {
+    name?: string
+    version?: string
+  }
+  os: {
+    name?: string
+    version?: string
+  }
+  cpu: {
+    architecture?: string
+  }
 }

test/integration/middleware-typescript/pages/interface/_middleware.ts

@@ -1,6 +1,10 @@
 import { NextMiddleware } from 'next/server'
 
 export const middleware: NextMiddleware = function (request) {
+  console.log(request.ua?.browser)
+  console.log(request.ua?.isBot)
+  console.log(request.ua?.ua)
+
   return new Response(null, {
     headers: {
       'req-url-basepath': request.nextUrl.basePath,