feat(schedule): group games by sport instead of date

Games in schedule view now display in sport sections (MLB, NBA, etc.)
with games sorted by date within each section. Each game row shows its
date since the section header now shows sport instead.

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

SportsTime/Features/Schedule/Views/ScheduleListView.swift

@@ -89,14 +89,17 @@ struct ScheduleListView: View {
                     .listRowBackground(Color.clear)
             }
 
-            ForEach(viewModel.gamesByDate, id: \.date) { dateGroup in
+            ForEach(viewModel.gamesBySport, id: \.sport) { sportGroup in
                 Section {
-                    ForEach(dateGroup.games) { richGame in
-                        GameRowView(game: richGame)
+                    ForEach(sportGroup.games) { richGame in
+                        GameRowView(game: richGame, showDate: true)
                     }
                 } header: {
-                    Text(formatSectionDate(dateGroup.date))
-                        .font(.headline)
+                    HStack(spacing: 8) {
+                        Image(systemName: sportGroup.sport.iconName)
+                        Text(sportGroup.sport.rawValue)
+                    }
+                    .font(.headline)
                 }
                 .listRowBackground(Theme.cardBackground(colorScheme))
             }
@@ -204,9 +207,18 @@ struct SportFilterChip: View {
 
 struct GameRowView: View {
     let game: RichGame
+    var showDate: Bool = false
 
     var body: some View {
         VStack(alignment: .leading, spacing: 8) {
+            // Date (when grouped by sport)
+            if showDate {
+                Text(formattedDate)
+                    .font(.caption)
+                    .fontWeight(.medium)
+                    .foregroundStyle(.secondary)
+            }
+
             // Teams
             HStack {
                 VStack(alignment: .leading, spacing: 4) {
@@ -220,11 +232,6 @@ struct GameRowView: View {
                 }
 
                 Spacer()
-
-                // Sport badge
-                Image(systemName: game.game.sport.iconName)
-                    .font(.caption)
-                    .foregroundStyle(.secondary)
             }
 
             // Game info
@@ -241,6 +248,12 @@ struct GameRowView: View {
         }
         .padding(.vertical, 4)
     }
+
+    private var formattedDate: String {
+        let formatter = DateFormatter()
+        formatter.dateFormat = "EEE, MMM d"
+        return formatter.string(from: game.game.dateTime)
+    }
 }
 
 // MARK: - Team Badge