Asking whether a place is already in one of your lists took a walk over
every collection and lost the coordinate tolerance the server matches on.
Marking a trip's places visited across every list holding them was one call
per place.
The dashboard's next-booking view is a three way union that folds in
synthetic check-in and check-out rows, so rebuilding it from per-trip
summaries silently drops the accommodations.
Maurice
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