fix: split middleware in two, authed and public

types/auth.d.ts

@@ -1,4 +1,5 @@
 import "next-auth"
+import type { NextRequest } from "next/server"
 
 // Module augmentation
 // https://authjs.dev/getting-started/typescript#popular-interfaces-to-augment
@@ -21,6 +22,14 @@ declare module "next-auth" {
    * Returned by `useSession`, `auth`, contains information about the active session.
    */
   interface Session {}
+
+  /**
+   *  NextAuthRequest isn't exported by next-auth so we declare a copy
+   *  of how they do it to support or switch in middleware.ts
+   */
+  interface NextAuthRequest extends NextRequest {
+    auth: Session | null
+  }
 }
 
 declare module "next-auth/jwt" {