itinerary: split day plans into days/, plan SF Sep 21

- One file per day under days/; timeline table reduced to date, weekday, place
- Sep 19–20: KT & VT Uber to Airbnb, rest day; LK & MS drive rental to Airbnb
- Sep 21: Silicon Valley morning, optional Twin Peaks / Painted Ladies /
  Lands End, Battery Spencer at sunset
- LK Hertz LAX rental marked not available for planning; LA / San Diego
  hotels cancelled
- sf_sights: add Silicon Valley and Mission / Castro, skip Computer History
  Museum

Claude-Session: https://claude.ai/code/session_01CWLR7htYGAB9i89P8jCCLn

days/2026-10-03.md

@@ -0,0 +1,9 @@
+# Oct 3 (Sat) — Las Vegas → San Francisco
+
+**Stay:** TBC — overnight stop / endpoint on the drive back
+
+## Logistics
+
+- Check out of Wyndham by 10 AM
+- KT & VT fly LAS → Sofia ([flights](../bookings/transport/flights-kt-vt.md))
+- MS starts the drive back to SF