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>

mlbTVOS/Views/FeedView.swift

@@ -0,0 +1,71 @@
+import SwiftUI
+
+struct FeedView: View {
+    @State private var viewModel = FeedViewModel()
+
+    var body: some View {
+        ScrollView {
+            VStack(alignment: .leading, spacing: DS.Spacing.cardGap) {
+                // Header
+                HStack {
+                    VStack(alignment: .leading, spacing: 4) {
+                        Text("FEED")
+                            .font(DS.Fonts.caption)
+                            .foregroundStyle(DS.Colors.textQuaternary)
+                            .kerning(3)
+                        Text("Latest Intel")
+                            #if os(tvOS)
+                            .font(DS.Fonts.tvSectionTitle)
+                            #else
+                            .font(DS.Fonts.sectionTitle)
+                            #endif
+                            .foregroundStyle(DS.Colors.textPrimary)
+                    }
+
+                    Spacer()
+
+                    if viewModel.isLoading {
+                        ProgressView()
+                    }
+                }
+
+                if viewModel.items.isEmpty && !viewModel.isLoading {
+                    VStack(spacing: 16) {
+                        Image(systemName: "newspaper")
+                            .font(.system(size: 44))
+                            .foregroundStyle(DS.Colors.textQuaternary)
+                        Text("No feed items yet")
+                            .font(DS.Fonts.body)
+                            .foregroundStyle(DS.Colors.textTertiary)
+                    }
+                    .frame(maxWidth: .infinity)
+                    .padding(.top, 80)
+                } else {
+                    LazyVStack(spacing: DS.Spacing.itemGap) {
+                        ForEach(viewModel.items) { item in
+                            FeedItemView(item: item)
+                        }
+                    }
+                }
+            }
+            .padding(.horizontal, edgeInset)
+            .padding(.vertical, DS.Spacing.sectionGap)
+        }
+        .background(DS.Colors.background)
+        .task {
+            await viewModel.loadFeed()
+        }
+        .onAppear {
+            viewModel.startAutoRefresh()
+        }
+        .onDisappear {
+            viewModel.stopAutoRefresh()
+        }
+    }
+
+    #if os(tvOS)
+    private var edgeInset: CGFloat { 60 }
+    #else
+    private var edgeInset: CGFloat { 20 }
+    #endif
+}