Add check-in feature and update travel planner UI

server/README.md

@@ -2,6 +2,8 @@
 
 This FastAPI service is the server-only AI boundary for the Guangming travel POC. It defaults to deterministic `mock` mode. Model credentials belong only in `server/.env` or the deployment environment and must never be added to the mini-program build.
 
+This service is reserved for a later AI integration phase. The current mini-program `createPlan` entry point is hard-wired to the local planner and does not call this service.
+
 ## Contract
 
 `POST /api/v1/plans` accepts a planning request and a coordinate-free POI whitelist:
@@ -12,15 +14,9 @@ This FastAPI service is the server-only AI boundary for the Guangming travel POC
   "preferences": {
     "destination": "深圳市光明区",
     "themes": ["亲子"],
-    "duration": "half_day",
     "pace": "moderate",
     "interests": ["自然风光"],
-    "adults": 2,
-    "children": 1,
-    "childAges": [6],
-    "transport": "public_transport",
-    "budgetLevel": "standard",
-    "extraRequirements": ""
+    "transport": "public_transport"
   },
   "durationMinutes": 240,
   "selectedPoiIds": ["poi_a", "poi_b"],