Refactor to use ai/rsc (#253)

lib/types.ts

@@ -1,4 +1,4 @@
-import { type Message } from 'ai'
+import { Message } from 'ai'
 
 export interface Chat extends Record<string, any> {
   id: string
@@ -16,3 +16,15 @@ export type ServerActionResult<Result> = Promise<
       error: string
     }
 >
+
+export interface Session {
+  user: {
+    id: string
+    email: string
+  }
+}
+
+export interface AuthResult {
+  type: string
+  message: string
+}