fix: resolve 4 UI/planning bugs from issue tracker

- Lock all maps to North America (no pan/zoom) in ProgressMapView and TripDetailView
- Sort saved trips by most cities (stops count)
- Filter cross-country trips to top 2 by stops on home screen
- Use LocationSearchSheet for Follow Team home location (consistent with must-stop)
- Initialize DateRangePicker to show selected dates on appear

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

SportsTime/Core/Services/SuggestedTripsGenerator.swift

@@ -56,7 +56,16 @@ final class SuggestedTripsGenerator {
     var tripsByRegion: [(region: Region, trips: [SuggestedTrip])] {
         let grouped = Dictionary(grouping: suggestedTrips) { $0.region }
         return Region.allCases.compactMap { region in
-            guard let trips = grouped[region], !trips.isEmpty else { return nil }
+            guard var trips = grouped[region], !trips.isEmpty else { return nil }
+
+            // For cross-country trips, sort by most stops (descending) and limit to top 2
+            if region == .crossCountry {
+                trips = trips
+                    .sorted { $0.trip.stops.count > $1.trip.stops.count }
+                    .prefix(2)
+                    .map { $0 }
+            }
+
             return (region: region, trips: trips)
         }
     }