perf: add pagination to schedule list

Loads 50 games at a time to fix lag with large datasets.

- Add pagination state (displayedGames, currentPage, allFilteredGames)
- Add loadInitialGames() and loadMoreGames() methods
- Update gamesBySport to use displayedGames
- Add infinite scroll trigger via onAppear on last game
- Add ProgressView indicator when more games available
- Reset pagination when search text changes

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

SportsTime/Features/Schedule/Views/ScheduleListView.swift

@@ -12,11 +12,11 @@ struct ScheduleListView: View {
 
     var body: some View {
         Group {
-            if viewModel.isLoading && viewModel.games.isEmpty {
+            if viewModel.isLoading && viewModel.displayedGames.isEmpty {
                 loadingView
             } else if let errorMessage = viewModel.errorMessage {
                 errorView(message: errorMessage)
-            } else if viewModel.games.isEmpty {
+            } else if viewModel.displayedGames.isEmpty {
                 emptyView
             } else {
                 gamesList
@@ -58,6 +58,9 @@ struct ScheduleListView: View {
         .task {
             await viewModel.loadGames()
         }
+        .onChange(of: viewModel.searchText) {
+            viewModel.updateFilteredGames()
+        }
     }
 
     // MARK: - Sport Filter
@@ -93,6 +96,12 @@ struct ScheduleListView: View {
                 Section {
                     ForEach(sportGroup.games) { richGame in
                         GameRowView(game: richGame, showDate: true, showLocation: true)
+                            .onAppear {
+                                // Trigger load more when the last game appears
+                                if richGame.id == viewModel.lastDisplayedGame?.id {
+                                    viewModel.loadMoreGames()
+                                }
+                            }
                     }
                 } header: {
                     HStack(spacing: 8) {
@@ -103,6 +112,18 @@ struct ScheduleListView: View {
                 }
                 .listRowBackground(Theme.cardBackground(colorScheme))
             }
+
+            // Show loading indicator when more games are available
+            if viewModel.hasMoreGames {
+                Section {
+                    HStack {
+                        Spacer()
+                        ProgressView()
+                        Spacer()
+                    }
+                    .listRowBackground(Color.clear)
+                }
+            }
         }
         .listStyle(.plain)
         .scrollContentBackground(.hidden)