Fix tvOS memory crash: cap highlights to 50, replace blurs with gradients

The app was crashing from memory pressure on tvOS. Three causes fixed:

1. Feed was rendering all 418 highlights at once — capped to 50 items.

2. FeaturedGameCard had 3 blur effects (radius 80-120) on large circles
   for team color glow — replaced with a single LinearGradient. Same
   visual effect, fraction of the GPU memory.

3. BroadcastBackground had 3 blurred circles (radius 120-140, 680-900px)
   rendering on every screen — replaced with RadialGradients which are
   composited by the GPU natively without offscreen render passes.

Also fixed iOS build: replaced tvOS-only font refs (tvSectionTitle,
tvBody) with cross-platform equivalents in DashboardView fallback state.

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

mlbTVOS/Views/LeagueCenterView.swift

@@ -34,6 +34,8 @@ struct LeagueCenterView: View {
                     messagePanel(overviewErrorMessage, tint: .orange)
                 }
 
+                scheduleSection
+
                 #if os(tvOS)
                 // Side-by-side: standings left, leaders right
                 HStack(alignment: .top, spacing: 24) {
@@ -86,11 +88,11 @@ struct LeagueCenterView: View {
     private var header: some View {
         HStack(alignment: .top, spacing: 24) {
             VStack(alignment: .leading, spacing: 8) {
-                Text("Around MLB")
+                Text("League Center")
                     .font(.system(size: 42, weight: .bold, design: .rounded))
                     .foregroundStyle(DS.Colors.textPrimary)
 
-                Text("Standings, league leaders, team context, roster access, and player snapshots in one control room.")
+                Text("Schedule navigation, standings, league leaders, roster access, and player snapshots in one board.")
                     .font(.system(size: 16, weight: .medium))
                     .foregroundStyle(DS.Colors.textTertiary)
             }
@@ -100,7 +102,7 @@ struct LeagueCenterView: View {
             HStack(spacing: 12) {
                 infoPill(title: "\(viewModel.leagueLeaders.count)", label: "Leaders", color: .blue)
                 infoPill(title: "\(viewModel.teams.count)", label: "Teams", color: .green)
-                infoPill(title: "\(viewModel.standings.count)", label: "Divisions", color: .orange)
+                infoPill(title: "\(viewModel.scheduleGames.count)", label: "Games", color: .orange)
             }
         }
     }
@@ -737,15 +739,24 @@ struct LeagueCenterView: View {
 
     private var sectionPanel: some View {
         RoundedRectangle(cornerRadius: 24, style: .continuous)
-            .fill(DS.Colors.panelFill)
+            .fill(
+                LinearGradient(
+                    colors: [
+                        DS.Colors.panelFill,
+                        DS.Colors.panelFillMuted,
+                    ],
+                    startPoint: .topLeading,
+                    endPoint: .bottomTrailing
+                )
+            )
             .shadow(color: DS.Shadows.card, radius: DS.Shadows.cardRadius, y: DS.Shadows.cardY)
             .overlay {
                 RoundedRectangle(cornerRadius: 24, style: .continuous)
-                    .strokeBorder(DS.Colors.panelStroke, lineWidth: 0.5)
+                    .strokeBorder(DS.Colors.panelStroke, lineWidth: 1)
             }
     }
 
     private var screenBackground: some View {
-        DS.Colors.background
+        BroadcastBackground()
     }
 }