Streak Freeze Feature Implementation

Nucleic-Session: 89DB7BC1-F74C-4768-BC7B-25F898265E0E

NucleicRemote/NucleicRemote/Views/HomeView.swift

@@ -19,16 +19,11 @@ struct HomeView: View {
                    uniquingKeysWith: +)
     }
 
-    private var streak: Int {
-        let cal = Calendar.current
-        var day = cal.startOfDay(for: Date())
-        if (activityByDay[day] ?? 0) == 0 { day = cal.date(byAdding: .day, value: -1, to: day)! }
-        var count = 0
-        while (activityByDay[day] ?? 0) > 0 {
-            count += 1
-            day = cal.date(byAdding: .day, value: -1, to: day)!
-        }
-        return count
+    /// Current activity streak with streak freezes folded in — the run of consecutive active
+    /// days, where a banked freeze (one earned per five days) bridges a missed day. Shared with
+    /// the Mac via `StreakState`, so both devices report the same streak and frozen days.
+    private var streakState: StreakState {
+        StreakState.compute(activityByDay: activityByDay)
     }
 
     private var greeting: String {