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/ViewModels/FeedViewModel.swift

@@ -0,0 +1,95 @@
+import Foundation
+import Observation
+import OSLog
+
+private let feedLogger = Logger(subsystem: "com.treyt.mlbTVOS", category: "Feed")
+
+private func logFeed(_ message: String) {
+    feedLogger.debug("\(message, privacy: .public)")
+    print("[Feed] \(message)")
+}
+
+enum FeedItemType: Sendable {
+    case news
+    case transaction
+    case scoring
+}
+
+struct FeedItem: Identifiable, Sendable {
+    let id: String
+    let type: FeedItemType
+    let title: String
+    let subtitle: String
+    let teamCode: String?
+    let timestamp: Date
+}
+
+@Observable
+@MainActor
+final class FeedViewModel {
+    var items: [FeedItem] = []
+    var isLoading = false
+
+    @ObservationIgnored
+    private var refreshTask: Task<Void, Never>?
+
+    private let webService = MLBWebDataService()
+
+    func loadFeed() async {
+        isLoading = true
+        logFeed("loadFeed start")
+
+        async let newsTask = webService.fetchNewsHeadlines()
+        async let transactionsTask = webService.fetchTransactions()
+
+        let news = await newsTask
+        let transactions = await transactionsTask
+
+        var allItems: [FeedItem] = []
+
+        // News
+        for headline in news {
+            allItems.append(FeedItem(
+                id: "news-\(headline.id)",
+                type: .news,
+                title: headline.title,
+                subtitle: headline.summary,
+                teamCode: nil,
+                timestamp: headline.timestamp
+            ))
+        }
+
+        // Transactions
+        for tx in transactions {
+            allItems.append(FeedItem(
+                id: "tx-\(tx.id)",
+                type: .transaction,
+                title: tx.description,
+                subtitle: tx.type,
+                teamCode: tx.teamCode.isEmpty ? nil : tx.teamCode,
+                timestamp: tx.date
+            ))
+        }
+
+        // Sort reverse chronological
+        items = allItems.sorted { $0.timestamp > $1.timestamp }
+        isLoading = false
+        logFeed("loadFeed complete items=\(items.count)")
+    }
+
+    func startAutoRefresh() {
+        stopAutoRefresh()
+        refreshTask = Task { [weak self] in
+            while !Task.isCancelled {
+                try? await Task.sleep(for: .seconds(300))
+                guard !Task.isCancelled, let self else { break }
+                await self.loadFeed()
+            }
+        }
+    }
+
+    func stopAutoRefresh() {
+        refreshTask?.cancel()
+        refreshTask = nil
+    }
+}

mlbTVOS/ViewModels/GameCenterViewModel.swift

@@ -16,6 +16,7 @@ final class GameCenterViewModel {
     var highlights: [Highlight] = []
     var winProbabilityHome: Double?
     var winProbabilityAway: Double?
+    var winProbabilityHistory: [WinProbabilityEntry] = []
     var isLoading = false
     var errorMessage: String?
     var lastUpdated: Date?
@@ -81,6 +82,7 @@ final class GameCenterViewModel {
     private func refreshWinProbability(gamePk: String) async {
         do {
             let entries = try await statsAPI.fetchWinProbability(gamePk: gamePk)
+            winProbabilityHistory = entries
             if let latest = entries.last,
                let home = latest.homeTeamWinProbability,
                let away = latest.awayTeamWinProbability {

mlbTVOS/ViewModels/LeagueCenterViewModel.swift

@@ -7,6 +7,8 @@ final class LeagueCenterViewModel {
     var scheduleGames: [StatsGame] = []
     var standings: [StandingsDivisionRecord] = []
     var teams: [LeagueTeamSummary] = []
+    var leagueLeaders: [LeaderCategory] = []
+    var isLoadingLeaders = false
 
     var selectedTeam: TeamProfile?
     var roster: [RosterPlayerSummary] = []
@@ -21,6 +23,7 @@ final class LeagueCenterViewModel {
     var playerErrorMessage: String?
 
     private let statsAPI = MLBStatsAPI()
+    private let webService = MLBWebDataService()
     private(set) var scheduleDate = Date()
 
     private var seasonString: String {
@@ -56,6 +59,19 @@ final class LeagueCenterViewModel {
         }
 
         isLoadingOverview = false
+
+        // Load leaders in the background
+        Task { await loadLeaders() }
+    }
+
+    func loadLeaders() async {
+        isLoadingLeaders = true
+        do {
+            leagueLeaders = try await webService.fetchLeagueLeaders()
+        } catch {
+            // Leaders are supplementary
+        }
+        isLoadingLeaders = false
     }
 
     func goToPreviousDay() async {