feat: 改进标签系统 — 新增品类/费用/强度/预约标签，timeSlot 参与选活动

- IdeaCategory 扩展 7→9，新增 experience（体验）和 nature（自然）
- 替换 outdoor boolean 为 costLevel/intensity/needsBooking 三个高价值字段
- AI 标注 prompt 同步更新，行程规划新增强度交替、费用平衡、预约提醒原则
- selectIdeasForSlots 重写为四优先级：timeSlot+category > category > timeSlot > 任意
- 前端想法卡片展示费用/强度/预约标签

src/app/api/blindbox/route.ts

@@ -32,7 +32,9 @@ export const POST = apiHandler(async (req) => {
         category: tags.category,
         timeSlot: tags.timeSlot,
         estimatedMinutes: tags.estimatedMinutes,
-        outdoor: tags.outdoor,
+        costLevel: tags.costLevel,
+        intensity: tags.intensity,
+        needsBooking: tags.needsBooking,
         searchQuery: tags.searchQuery,
         searchType: tags.searchType,
       },
@@ -65,7 +67,9 @@ export const GET = apiHandler(async (req) => {
         category: true,
         timeSlot: true,
         estimatedMinutes: true,
-        outdoor: true,
+        costLevel: true,
+        intensity: true,
+        needsBooking: true,
         searchQuery: true,
         searchType: true,
       },
@@ -109,7 +113,9 @@ export const PUT = apiHandler(async (req) => {
         category: tags.category,
         timeSlot: tags.timeSlot,
         estimatedMinutes: tags.estimatedMinutes,
-        outdoor: tags.outdoor,
+        costLevel: tags.costLevel,
+        intensity: tags.intensity,
+        needsBooking: tags.needsBooking,
         searchQuery: tags.searchQuery,
         searchType: tags.searchType,
       },