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/Home/Views/HomeView.swift

@@ -93,6 +93,7 @@ struct HomeView: View {
         .tint(Theme.warmOrange)
         .sheet(isPresented: $showNewTrip) {
             TripWizardView()
+                .environment(\.isDemoMode, ProcessInfo.isDemoMode)
         }
         .onChange(of: showNewTrip) { _, isShowing in
             if !isShowing {

SportsTime/Features/Home/Views/Variants/Classic/HomeContent_Classic.swift

@@ -80,6 +80,7 @@ struct HomeContent_Classic: View {
                 .foregroundStyle(.white)
                 .clipShape(RoundedRectangle(cornerRadius: Theme.CornerRadius.medium))
             }
+            .accessibilityIdentifier("home.startPlanningButton")
             .pressableStyle()
             .glowEffect(color: Theme.warmOrange, radius: 12)
         }