feat(wordcloud): WordCloudJob 模型/迁移 + 词云生成与轮询适配器

prisma/schema.prisma

@@ -29,6 +29,7 @@ model User {
   designLists    DesignList[]
   uploads        Upload[]
   customizations CustomizationTask[]
+  wordCloudJobs  WordCloudJob[]
 
   @@index([phone])
 }
@@ -221,3 +222,28 @@ enum CustomizationTaskStatus {
   SUCCESS
   FAILED
 }
+
+// ── 词云任务（R4：小程序交互生成 + 下单 WCD 派单共用）────────────────
+model WordCloudJob {
+  id           String             @id @default(cuid())
+  userId       String
+  // wordcloud 侧的外部 job_id（POST /api/jobs 返回）；空表示尚未在外部创建
+  remoteJobId  String?
+  status       WordCloudJobStatus @default(QUEUED)
+  progress     Int                @default(0)
+  imageUrl     String?
+  error        String?
+  user         User               @relation(fields: [userId], references: [id])
+
+  createdAt DateTime             @default(now())
+  updatedAt DateTime             @updatedAt
+
+  @@index([userId])
+}
+
+enum WordCloudJobStatus {
+  QUEUED
+  RUNNING
+  SUCCESS
+  FAILED
+}