Add Stadium Progress system and themed loading spinners

Stadium Progress & Achievements:
- Add StadiumVisit and Achievement SwiftData models
- Create Progress tab with interactive map view
- Implement photo-based visit import with GPS/date matching
- Add achievement badges (count-based, regional, journey)
- Create shareable progress cards for social media
- Add canonical data infrastructure (stadium identities, team aliases)
- Implement score resolution from free APIs (MLB, NBA, NHL stats)

UI Improvements:
- Add ThemedSpinner and ThemedSpinnerCompact components
- Replace all ProgressView() with themed spinners throughout app
- Fix sport selection state not persisting when navigating away

Bug Fixes:
- Fix Coast to Coast trips showing only 1 city (validation issue)
- Fix stadium progress showing 0/0 (filtering issue)
- Remove "Stadium Quest" title from progress view

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

SportsTime/SportsTimeApp.swift

@@ -12,10 +12,24 @@ import SwiftData
 struct SportsTimeApp: App {
     var sharedModelContainer: ModelContainer = {
         let schema = Schema([
+            // User data models
             SavedTrip.self,
             TripVote.self,
             UserPreferences.self,
             CachedSchedule.self,
+            // Stadium progress models
+            StadiumVisit.self,
+            VisitPhotoMetadata.self,
+            Achievement.self,
+            CachedGameScore.self,
+            // Canonical data models
+            SyncState.self,
+            CanonicalStadium.self,
+            StadiumAlias.self,
+            CanonicalTeam.self,
+            TeamAlias.self,
+            LeagueStructureModel.self,
+            CanonicalGame.self,
         ])
         let modelConfiguration = ModelConfiguration(
             schema: schema,
@@ -32,8 +46,100 @@ struct SportsTimeApp: App {
 
     var body: some Scene {
         WindowGroup {
-            HomeView()
+            BootstrappedContentView(modelContainer: sharedModelContainer)
         }
         .modelContainer(sharedModelContainer)
     }
 }
+
+// MARK: - Bootstrapped Content View
+
+/// Wraps the main content with bootstrap logic.
+/// Shows a loading indicator until bootstrap completes, then shows HomeView.
+struct BootstrappedContentView: View {
+    let modelContainer: ModelContainer
+
+    @State private var isBootstrapping = true
+    @State private var bootstrapError: Error?
+
+    var body: some View {
+        Group {
+            if isBootstrapping {
+                BootstrapLoadingView()
+            } else if let error = bootstrapError {
+                BootstrapErrorView(error: error) {
+                    Task {
+                        await performBootstrap()
+                    }
+                }
+            } else {
+                HomeView()
+            }
+        }
+        .task {
+            await performBootstrap()
+        }
+    }
+
+    @MainActor
+    private func performBootstrap() async {
+        isBootstrapping = true
+        bootstrapError = nil
+
+        let context = modelContainer.mainContext
+        let bootstrapService = BootstrapService()
+
+        do {
+            try await bootstrapService.bootstrapIfNeeded(context: context)
+            isBootstrapping = false
+        } catch {
+            bootstrapError = error
+            isBootstrapping = false
+        }
+    }
+}
+
+// MARK: - Bootstrap Loading View
+
+struct BootstrapLoadingView: View {
+    var body: some View {
+        VStack(spacing: 20) {
+            ThemedSpinner(size: 50, lineWidth: 4)
+
+            Text("Setting up SportsTime...")
+                .font(.headline)
+                .foregroundStyle(.secondary)
+        }
+    }
+}
+
+// MARK: - Bootstrap Error View
+
+struct BootstrapErrorView: View {
+    let error: Error
+    let onRetry: () -> Void
+
+    var body: some View {
+        VStack(spacing: 20) {
+            Image(systemName: "exclamationmark.triangle.fill")
+                .font(.system(size: 50))
+                .foregroundStyle(.orange)
+
+            Text("Setup Failed")
+                .font(.title2)
+                .fontWeight(.semibold)
+
+            Text(error.localizedDescription)
+                .font(.subheadline)
+                .foregroundStyle(.secondary)
+                .multilineTextAlignment(.center)
+                .padding(.horizontal)
+
+            Button("Try Again") {
+                onRetry()
+            }
+            .buttonStyle(.borderedProminent)
+        }
+        .padding()
+    }
+}