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/Features/Settings/Views/SettingsView.swift

@@ -6,6 +6,7 @@
 import SwiftUI
 
 struct SettingsView: View {
+    @Environment(\.colorScheme) private var colorScheme
     @State private var viewModel = SettingsViewModel()
     @State private var showResetConfirmation = false
 
@@ -91,6 +92,7 @@ struct SettingsView: View {
         } footer: {
             Text("Choose a color scheme for the app.")
         }
+        .listRowBackground(Theme.cardBackground(colorScheme))
     }
 
     // MARK: - Sports Section
@@ -115,6 +117,7 @@ struct SettingsView: View {
         } footer: {
             Text("Selected sports will be shown by default in schedules and trip planning.")
         }
+        .listRowBackground(Theme.cardBackground(colorScheme))
     }
 
     // MARK: - Travel Section
@@ -159,6 +162,7 @@ struct SettingsView: View {
         } footer: {
             Text("Trips will be optimized to keep daily driving within this limit.")
         }
+        .listRowBackground(Theme.cardBackground(colorScheme))
     }
 
     // MARK: - Data Section
@@ -176,7 +180,7 @@ struct SettingsView: View {
                     Spacer()
 
                     if viewModel.isSyncing {
-                        ProgressView()
+                        ThemedSpinnerCompact(size: 18)
                     }
                 }
             }
@@ -209,6 +213,7 @@ struct SettingsView: View {
             Text("Schedule data is synced from CloudKit.")
             #endif
         }
+        .listRowBackground(Theme.cardBackground(colorScheme))
     }
 
     // MARK: - About Section
@@ -236,6 +241,7 @@ struct SettingsView: View {
         } header: {
             Text("About")
         }
+        .listRowBackground(Theme.cardBackground(colorScheme))
     }
 
     // MARK: - Reset Section
@@ -248,6 +254,7 @@ struct SettingsView: View {
                 Label("Reset to Defaults", systemImage: "arrow.counterclockwise")
             }
         }
+        .listRowBackground(Theme.cardBackground(colorScheme))
     }
 
     // MARK: - Helpers