fix(sync): add foreground sync, remove manual sync button

- Add scenePhase observer to sync when app returns to foreground
- Remove misleading "Sync Schedules" button from Settings (it only
  reloaded local data, didn't actually sync from CloudKit)
- Fix GamesHistoryView to refresh list after deleting a visit

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

SportsTime/Features/Settings/ViewModels/SettingsViewModel.swift

@@ -26,12 +26,6 @@ final class SettingsViewModel {
         didSet { savePreferences() }
     }
 
-    // MARK: - Sync State
-
-    private(set) var isSyncing = false
-    private(set) var lastSyncDate: Date?
-    private(set) var syncError: String?
-
     // MARK: - App Info
 
     let appVersion: String
@@ -57,9 +51,6 @@ final class SettingsViewModel {
         let savedDrivingHours = defaults.integer(forKey: "maxDrivingHoursPerDay")
         self.maxDrivingHoursPerDay = savedDrivingHours == 0 ? 8 : savedDrivingHours
 
-        // Last sync
-        self.lastSyncDate = defaults.object(forKey: "lastSyncDate") as? Date
-
         // App info
         self.appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "1.0.0"
         self.buildNumber = Bundle.main.infoDictionary?["CFBundleVersion"] as? String ?? "1"
@@ -67,19 +58,6 @@ final class SettingsViewModel {
 
     // MARK: - Actions
 
-    func syncSchedules() async {
-        isSyncing = true
-        syncError = nil
-
-        // Trigger data reload from provider
-        await AppDataProvider.shared.loadInitialData()
-
-        lastSyncDate = Date()
-        UserDefaults.standard.set(lastSyncDate, forKey: "lastSyncDate")
-
-        isSyncing = false
-    }
-
     func toggleSport(_ sport: Sport) {
         if selectedSports.contains(sport) {
             // Don't allow removing all sports