Streak Freeze Feature Implementation

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

NucleicRemote/NucleicRemote/Views/HomeView.swift

@@ -135,6 +135,8 @@ private struct StatCard: View {
 /// A lightning bolt whose charge grows with the streak (mirrors the Mac StreakBadge).
 struct StreakBadge: View {
     let days: Int
+    /// Streak freezes in reserve (one per five days), shown as a small snowflake tally.
+    var freezes: Int = 0
     private var intensity: Double { min(1, Double(max(0, days - 1)) / 20) }
 
     var body: some View {
@@ -152,6 +154,14 @@ struct StreakBadge: View {
                 Text("\(days)").font(.headline.monospacedDigit())
                 Text("day streak").font(.caption2).foregroundStyle(.secondary)
             }
+            if freezes > 0 {
+                HStack(spacing: 2) {
+                    Image(systemName: "snowflake")
+                    Text("\(freezes)").monospacedDigit()
+                }
+                .font(.caption.weight(.semibold))
+                .foregroundStyle(Palette.frozen)
+            }
         }
         .padding(.horizontal, 12).padding(.vertical, 8)
         .background(Color(.secondarySystemBackground), in: Capsule())