refactor: migrate session usage to better-auth API

src/app/api/ai-event/route.ts

@@ -1,8 +1,11 @@
 import { NextResponse } from "next/server";
 import { auth } from "@/auth";
+import { headers } from "next/headers";
 
 export async function POST(request: Request) {
-	const session = await auth();
+	const session = await auth.api.getSession({
+		headers: await headers(),
+	});
 	
 	if (!session?.user) {
 		return NextResponse.json(

src/app/page.tsx

@@ -2,7 +2,7 @@
 
 import { useEffect, useState } from 'react'
 import { nanoid } from 'nanoid'
-import { useSession } from 'next-auth/react'
+import { useSession } from '@/lib/auth-client'
 import { toast } from 'sonner'
 
 import { saveEvent as addEvent, deleteEvent, getEvents as getAllEvents, clearEvents, updateEvent } from '@/lib/events-db'
@@ -44,7 +44,7 @@ export default function HomePage() {
     })()
   }, [])
 
-  const { data: session, status } = useSession()
+  const { data: session, isPending } = useSession()
 
   const resetForm = () => {
     setTitle('')
@@ -256,8 +256,8 @@ export default function HomePage() {
       onImport={handleImport}
     >
       <AIToolbar
-        session={session}
-        status={status}
+        isAuthenticated={!!session?.user}
+        isPending={isPending}
         aiPrompt={aiPrompt}
         setAiPrompt={setAiPrompt}
         aiLoading={aiLoading}