active stays: ability to extent checkout time

AGENTS.md

@@ -177,6 +177,25 @@ Response
 
 ---
 
+### Update expected dates
+
+POST /properties/{propertyId}/bookings/{bookingId}/expected-dates
+
+Rules:
+
+- OPEN → can update expectedCheckInAt and/or expectedCheckOutAt
+- CHECKED_IN → can update only expectedCheckOutAt
+- CHECKED_OUT / CANCELLED / NO_SHOW → forbidden
+
+Body
+
+{
+  "expectedCheckInAt": "2026-01-29T12:00:00+05:30",
+  "expectedCheckOutAt": "2026-01-30T10:00:00+05:30"
+}
+
+---
+
 ## 2) Guests
 
 ### Create guest + link to booking