实现了AI助手

prisma/migrations/20250623095809_add_ai_conversations_json/migration.sql

@@ -0,0 +1,14 @@
+-- CreateTable
+CREATE TABLE "conversations" (
+    "id" TEXT NOT NULL,
+    "title" TEXT,
+    "messages" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "userId" TEXT NOT NULL,
+
+    CONSTRAINT "conversations_pkey" PRIMARY KEY ("id")
+);
+
+-- AddForeignKey
+ALTER TABLE "conversations" ADD CONSTRAINT "conversations_userId_fkey" FOREIGN KEY ("userId") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;