docs(trip): mark payments auto-paid, add LK travel plan

Airbnb and Miramonte cabin pay automatically on Sep 7/8. KT & VT
flight dates are confirmed; airline details deferred. LK flies
YVR-SFO with MS, leaves the group Sep 22 and rejoins Sep 27 ~5 PM
in LA.

bookings/flights-kt-vt.md

@@ -9,7 +9,7 @@
 | **Airline** | TBC |
 | **Flight** | TBC |
 
-**Confirm with KT:** airline · flight number.
+*Dates confirmed. Airline / flight number — details not needed yet.*
 
 ---
 
@@ -22,7 +22,7 @@
 | **Airline** | TBC |
 | **Flight** | TBC |
 
-**Confirm with KT:** airline · flight number.
+*Dates confirmed. Airline / flight number — details not needed yet.*
 
 ---