Update application code and dependencies

app/api/conversations/route.ts

@@ -0,0 +1,42 @@
+import { prisma } from "@/app/lib/prisma"
+import { NextResponse } from "next/server"
+
+export async function GET(request: Request) {
+  const { searchParams } = new URL(request.url)
+  const agentId = searchParams.get("agentId")
+
+  if (!agentId) {
+    return NextResponse.json({ error: "agentId is required" }, { status: 400 })
+  }
+
+  const conversations = await prisma.conversation.findMany({
+    where: { agentId: parseInt(agentId) },
+    orderBy: { updatedAt: "desc" },
+    include: {
+      messages: {
+        orderBy: { timestamp: "asc" },
+        take: 1,
+      },
+    },
+  })
+
+  return NextResponse.json(conversations)
+}
+
+export async function POST(request: Request) {
+  const body = await request.json()
+  const { agentId, title } = body
+
+  if (!agentId) {
+    return NextResponse.json({ error: "agentId is required" }, { status: 400 })
+  }
+
+  const conversation = await prisma.conversation.create({
+    data: {
+      agentId: parseInt(agentId),
+      title: title || "新对话",
+    },
+  })
+
+  return NextResponse.json(conversation)
+}