Add UI redesign: design system, dashboard density, game intelligence, feed tab, league leaders

Phase 1 - Design System: DesignSystem.swift (typography, colors, spacing
constants) and DataPanel.swift (reusable panel container with 3 densities
and optional team accent bar).

Phase 2 - Dashboard Density: LiveSituationBar (compact strip of all live
games with scores/innings/outs), MiniLinescoreView (R-H-E footer for game
cards), DiamondView (visual baseball diamond with runners and count).
Dashboard shows live situation bar when games are active. Game cards now
display mini linescore for live/final games.

Phase 3 - Game Center Intelligence: WinProbabilityChartView (full-game
line chart using Swift Charts with area fills), PitchArsenalView (pitch
type distribution with velocity bars). GameCenterViewModel now stores
full WP history array instead of just latest values.

Phase 4 - Feed Tab: MLBWebDataService (fetches league leaders from Stats
API, news headlines, transactions), FeedViewModel, FeedView with
reverse-chronological feed items. FeedItemView with colored edge bars
by category. Added 5th "Feed" tab to both tvOS and iOS.

Phase 5 - Intel Tab: LeaderboardView (top-5 stat cards with headshots),
integrated into LeagueCenterView. Renamed tabs: Games->Today,
League->Intel. LeagueCenterViewModel now fetches league leaders.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mlbIOS/Views/mlbIOSRootView.swift

@@ -4,15 +4,17 @@ private enum mlbIOSSection: String, CaseIterable, Identifiable {
     case games
     case league
     case multiView
+    case feed
     case settings
 
     var id: String { rawValue }
 
     var title: String {
         switch self {
-        case .games: "Games"
-        case .league: "League"
+        case .games: "Today"
+        case .league: "Intel"
         case .multiView: "Multi-View"
+        case .feed: "Feed"
         case .settings: "Settings"
         }
     }
@@ -20,8 +22,9 @@ private enum mlbIOSSection: String, CaseIterable, Identifiable {
     var systemImage: String {
         switch self {
         case .games: "sportscourt.fill"
-        case .league: "list.bullet.rectangle.portrait.fill"
+        case .league: "chart.bar.fill"
         case .multiView: "rectangle.split.2x2.fill"
+        case .feed: "newspaper.fill"
         case .settings: "gearshape.fill"
         }
     }
@@ -58,15 +61,18 @@ struct mlbIOSRootView: View {
 
     private var compactTabs: some View {
         TabView {
-            Tab("Games", systemImage: "sportscourt.fill") {
+            Tab("Today", systemImage: "sportscourt.fill") {
                 DashboardView()
             }
-            Tab("League", systemImage: "list.bullet.rectangle.portrait.fill") {
+            Tab("Intel", systemImage: "chart.bar.fill") {
                 LeagueCenterView()
             }
             Tab(multiViewTitle, systemImage: "rectangle.split.2x2.fill") {
                 MultiStreamView()
             }
+            Tab("Feed", systemImage: "newspaper.fill") {
+                FeedView()
+            }
             Tab("Settings", systemImage: "gearshape.fill") {
                 SettingsView()
             }
@@ -99,6 +105,8 @@ struct mlbIOSRootView: View {
             LeagueCenterView()
         case .multiView:
             MultiStreamView()
+        case .feed:
+            FeedView()
         case .settings:
             SettingsView()
         }