feat: rewrite bootstrap, fix CloudKit sync, update canonical data, and UI fixes

- Rewrite BootstrapService: remove all legacy code paths (JSONStadium,
  JSONGame, bootstrapStadiumsLegacy, bootstrapGamesLegacy, venue aliases,
  createDefaultLeagueStructure), require canonical JSON files only
- Add clearCanonicalData() to handle partial bootstrap recovery (prevents
  duplicate key crashes from interrupted first-launch)
- Fix nullable stadium_canonical_id in games (4 MLS games have null)
- Fix CKModels: logoUrl case, conference/division field keys
- Fix CanonicalSyncService: sync conferenceCanonicalId/divisionCanonicalId
- Add sports_canonical.json and DemoMode.swift
- Delete legacy stadiums.json and games.json
- Update all canonical resource JSON files with latest data
- Fix TripWizardView horizontal scrolling with GeometryReader constraint
- Update RegionMapSelector, TripDetailView, TripOptionsView UI improvements
- Add DateRangePicker, PlanningModeStep, SportsStep enhancements
- Update UI tests and marketing-videos config

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

SportsTime/Features/Trip/Views/TripDetailView.swift

@@ -12,6 +12,7 @@ import UniformTypeIdentifiers
 struct TripDetailView: View {
     @Environment(\.modelContext) private var modelContext
     @Environment(\.colorScheme) private var colorScheme
+    @Environment(\.isDemoMode) private var isDemoMode
 
     let trip: Trip
     private let providedGames: [String: RichGame]?
@@ -33,6 +34,7 @@ struct TripDetailView: View {
     @State private var isLoadingRoutes = false
     @State private var loadedGames: [String: RichGame] = [:]
     @State private var isLoadingGames = false
+    @State private var hasAppliedDemoSelection = false
 
     // Itinerary items state
     @State private var itineraryItems: [ItineraryItem] = []
@@ -113,7 +115,18 @@ struct TripDetailView: View {
             } message: {
                 Text("This trip has \(multiRouteChunks.flatMap { $0 }.count) stops, which exceeds Apple Maps' limit of 16. Open the route in parts?")
             }
-            .onAppear { checkIfSaved() }
+            .onAppear {
+                checkIfSaved()
+                // Demo mode: auto-favorite the trip
+                if isDemoMode && !hasAppliedDemoSelection && !isSaved {
+                    hasAppliedDemoSelection = true
+                    DispatchQueue.main.asyncAfter(deadline: .now() + DemoConfig.selectionDelay + 0.5) {
+                        if !isSaved {
+                            saveTrip()
+                        }
+                    }
+                }
+            }
             .task {
                 await loadGamesIfNeeded()
                 if allowCustomItems {
@@ -348,6 +361,7 @@ struct TripDetailView: View {
                         .clipShape(Circle())
                         .shadow(color: .black.opacity(0.2), radius: 4, y: 2)
                 }
+                .accessibilityIdentifier("tripDetail.favoriteButton")
                 .padding(.top, 12)
                 .padding(.trailing, 12)
             }