Add iPhone target with shared data layer and persistent cache

Two-target restructure: shared sources (models, services, settings,
extensions, team logos) move into Shared/, consumed by both the
existing macOS menu bar app and a new iOS app. MainService no longer
imports AppKit — platform code attaches via a MainServiceObserver
protocol (MacObserverAdapter wires back to MenuManager / StatusItemManager
/ NotificationManager).

iPhone app is a single SwiftUI page mirroring the macOS menu (playoff
round + yesterday/today/tomorrow), with a gear-icon settings sheet
(display option + IndieAbout for license/changelog). Persistent JSON
snapshot in Application Support paints last-known data on cold launch;
"Updated …" header escalates secondary → orange (>5min) → red (>30min)
so staleness is visually unmistakable. Foreground polling, scenePhase
refresh, and pull-to-refresh; no notifications on iOS in v1.

IceGlass-iOS/Views/PlayoffRoundSection.swift

@@ -0,0 +1,33 @@
+//
+// PlayoffRoundSection.swift
+// IceGlass-iOS
+//
+// Copyright 2026 Rouslan Zenetl. All Rights Reserved.
+//
+
+import SwiftUI
+
+struct PlayoffRoundSection: View {
+    let round: Int
+    let items: [MainService.RoundSeriesItem]
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            Text("ROUND \(round)")
+                .font(.caption)
+                .fontWeight(.bold)
+                .foregroundStyle(.secondary)
+
+            VStack(spacing: 0) {
+                ForEach(items, id: \.series.seriesLetter) { item in
+                    SeriesRow(item: item)
+                    if item.series.seriesLetter != items.last?.series.seriesLetter {
+                        Divider()
+                    }
+                }
+            }
+            .background(Color(uiColor: .secondarySystemGroupedBackground))
+            .clipShape(RoundedRectangle(cornerRadius: 12))
+        }
+    }
+}