feat(gamification): integrate gamification into app — badge celebration overlay, history stats+badges tabs

ios/ChronoMind/App/ChronoMindApp.swift

@@ -7,20 +7,34 @@ import WidgetKit
 struct ChronoMindApp: App {
     @StateObject private var timerStore = TimerStore()
     @StateObject private var notificationManager = CMNotificationManager.shared
+    @StateObject private var gamification = GamificationStore.shared
 
     var body: some Scene {
         WindowGroup {
-            ContentView()
-                .environmentObject(timerStore)
-                .environmentObject(notificationManager)
-                .preferredColorScheme(.dark)
-                .task {
-                    notificationManager.registerCategories()
-                    await notificationManager.requestPermission()
-                }
-                .onReceive(NotificationCenter.default.publisher(for: .chronoMindTimersDidChange)) { _ in
-                    WidgetCenter.shared.reloadAllTimelines()
+            ZStack {
+                ContentView()
+                    .environmentObject(timerStore)
+                    .environmentObject(notificationManager)
+                    .environmentObject(gamification)
+                    .preferredColorScheme(.dark)
+                    .task {
+                        notificationManager.registerCategories()
+                        await notificationManager.requestPermission()
+                    }
+                    .onReceive(NotificationCenter.default.publisher(for: .chronoMindTimersDidChange)) { _ in
+                        WidgetCenter.shared.reloadAllTimelines()
+                    }
+
+                // Badge celebration overlay
+                if let badge = gamification.newBadge {
+                    BadgeCelebrationOverlay(badge: badge) {
+                        gamification.clearNewBadge()
+                    }
+                    .transition(.opacity)
+                    .zIndex(100)
                 }
+            }
+            .animation(.easeInOut, value: gamification.newBadge != nil)
         }
     }
 }

ios/ChronoMind/Views/History/HistoryView.swift

@@ -10,6 +10,7 @@ struct HistoryView: View {
     enum HistorySegment: String, CaseIterable {
         case recent = "Recent"
         case stats = "Stats"
+        case badges = "Badges"
     }
 
     private var completedTimers: [CMTimer] {
@@ -39,6 +40,8 @@ struct HistoryView: View {
                         recentList
                     case .stats:
                         statsView
+                    case .badges:
+                        badgesView
                     }
                 }
             }
@@ -87,6 +90,20 @@ struct HistoryView: View {
     private var statsView: some View {
         ScrollView {
             VStack(spacing: CMSpacing.lg) {
+                // Streak card
+                StreakCard()
+
+                // Focus score
+                let focusScore = GamificationEngine.calculateFocusScore(timers: store.timers)
+                FocusScoreCard(score: focusScore)
+
+                // Weekly summary card (shareable)
+                let summary = GamificationEngine.generateWeeklySummary(
+                    timers: store.timers,
+                    streak: GamificationStore.shared.streak
+                )
+                WeeklySummaryCard(summary: summary)
+
                 // Summary cards
                 let allTimers = store.timers
                 let completed = allTimers.filter { $0.state == .completed }.count
@@ -166,6 +183,22 @@ struct HistoryView: View {
             .padding(.bottom, CMSpacing.xxl)
         }
     }
+
+    // MARK: - Badges View
+
+    private var badgesView: some View {
+        ScrollView {
+            VStack(spacing: CMSpacing.lg) {
+                // Streak card (compact)
+                StreakCard()
+
+                // Badge grid
+                BadgeGridView()
+            }
+            .padding(.horizontal, CMSpacing.lg)
+            .padding(.bottom, CMSpacing.xxl)
+        }
+    }
 }
 
 // MARK: - Stat Card