feat: AI 周末行程规划 — DeepSeek 智能排期 + 高德 POI + 多日翻页

- 接入 DeepSeek API，提交想法时自动 AI 打标（品类/时段/时长/搜索策略）
- 新增行程规划 API：智能选取想法 → 高德 POI 搜索 → AI 生成最优行程
- 支持多日计划（"整个周末"拆分周六/周日，并行 AI 调用）
- 行程展示逐日翻页，时间线可滚动，操作按钮固定底部
- 分享卡适配多日格式，支持图片保存与原生分享
- Prisma schema 新增 WeekendPlan 模型及 BlindBoxIdea AI 标签字段
- Jenkinsfile 集成 DEEPSEEK_API_KEY 环境变量

prisma/schema.prisma

@@ -31,6 +31,7 @@ model User {
   blindBoxMemberships  BlindBoxMember[]
   submittedIdeas       BlindBoxIdea[]   @relation("IdeaSubmitter")
   drawnIdeas           BlindBoxIdea[]   @relation("IdeaDrawer")
+  weekendPlans         WeekendPlan[]
 }
 
 model Decision {
@@ -65,11 +66,15 @@ model BlindBoxRoom {
   code      String   @unique
   name      String
   creatorId String
+  city      String?
+  lat       Float?
+  lng       Float?
   createdAt DateTime @default(now())
 
   creator User             @relation("RoomCreator", fields: [creatorId], references: [id])
   members BlindBoxMember[]
   ideas   BlindBoxIdea[]
+  plans   WeekendPlan[]
 }
 
 model BlindBoxMember {
@@ -93,6 +98,13 @@ model BlindBoxIdea {
   drawnById String?
   createdAt DateTime @default(now())
 
+  category         String?
+  timeSlot         String?
+  estimatedMinutes Int?
+  outdoor          Boolean?
+  searchQuery      String?
+  searchType       String?
+
   room    BlindBoxRoom @relation(fields: [roomId], references: [id], onDelete: Cascade)
   user    User         @relation("IdeaSubmitter", fields: [userId], references: [id], onDelete: Cascade)
   drawnBy User?        @relation("IdeaDrawer", fields: [drawnById], references: [id], onDelete: SetNull)
@@ -100,3 +112,17 @@ model BlindBoxIdea {
   @@index([roomId, status])
   @@index([userId])
 }
+
+model WeekendPlan {
+  id        String   @id @default(cuid())
+  roomId    String
+  userId    String
+  planData  String
+  status    String   @default("active")
+  createdAt DateTime @default(now())
+
+  room BlindBoxRoom @relation(fields: [roomId], references: [id], onDelete: Cascade)
+  user User         @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@index([roomId])
+}