feat: Add Document model and database schema for artifacts support

Author: Trynax

prisma/migrations/20250815115018_add_documents_artifacts/migration.sql

@@ -0,0 +1,22 @@
+-- CreateEnum
+CREATE TYPE "ArtifactKind" AS ENUM ('text', 'code', 'custom');
+
+-- CreateTable
+CREATE TABLE "Document" (
+    "id" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "title" TEXT NOT NULL,
+    "content" TEXT,
+    "kind" "ArtifactKind" NOT NULL DEFAULT 'text',
+    "userId" TEXT NOT NULL,
+    "chatId" TEXT,
+
+    CONSTRAINT "Document_pkey" PRIMARY KEY ("id")
+);
+
+-- AddForeignKey
+ALTER TABLE "Document" ADD CONSTRAINT "Document_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "Document" ADD CONSTRAINT "Document_chatId_fkey" FOREIGN KEY ("chatId") REFERENCES "Chat"("id") ON DELETE SET NULL ON UPDATE CASCADE;

prisma/schema.prisma

@@ -57,6 +57,7 @@ model User {
     videos        Video[]
     userFeatures  UserFeature[]
     workbenches   Workbench[]
+    documents     Document[]
 }
 
 enum UserRole {
@@ -92,6 +93,7 @@ model Chat {
     messages     Message[]
     stream       Stream[]
     workbench    Workbench? @relation(fields: [workbenchId], references: [id], onDelete: SetNull)
+    documents    Document[]
 }
 
 model Message {
@@ -190,4 +192,23 @@ model Tool {
     toolkit     Toolkit  @relation(fields: [toolkitId], references: [id], onDelete: Cascade)
 
     @@id([id, toolkitId])
+}
+
+enum ArtifactKind {
+    text
+    code
+    custom
+}
+
+model Document {
+    id        String       @id @default(uuid())
+    createdAt DateTime     @default(now())
+    updatedAt DateTime     @updatedAt
+    title     String
+    content   String?      @db.Text
+    kind      ArtifactKind @default(text)
+    userId    String
+    chatId    String?      // Optional association with a chat
+    user      User         @relation(fields: [userId], references: [id], onDelete: Cascade)
+    chat      Chat?        @relation(fields: [chatId], references: [id], onDelete: SetNull)
 }