itinerary: plan Death Valley day trip

itinerary.md

@@ -59,11 +59,11 @@ One file per day in [`days/`](days/): logistics, agreed plan, open notes, addres
 | [Sep 28](days/2026-09-28.md) | Mon | Open day in Los Angeles |
 | [Sep 29](days/2026-09-29.md) | Tue | Getty Center & Griffith Observatory |
 | [Sep 30](days/2026-09-30.md) | Wed | LA → Calico → Red Rock Canyon → Las Vegas |
-| [Oct 1](days/2026-10-01.md) | Thu | Las Vegas |
+| [Oct 1](days/2026-10-01.md) | Thu | Death Valley viewpoints · Las Vegas evening |
 | [Oct 2](days/2026-10-02.md) | Fri | Las Vegas |
 | [Oct 3](days/2026-10-03.md) | Sat | Las Vegas → SF |
 | [Oct 4](days/2026-10-04.md) | Sun | San Francisco |
 
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-*Last updated: 2026-09-20*
+*Last updated: 2026-10-01*