iOS 1.0 RC 1: battery and heat work, version label, web player redraw tweaks

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ios/Stemify/App/StemifyApp.swift

@@ -36,6 +36,7 @@ struct StemifyApp: App {
             RootView()
         }
         .onChange(of: phase) { _, p in
+            AppActivity.setPhone(p != .background)
             guard p == .active else { return }
             AppGraph.shared.eq.refreshRoute()
             // Keep downloaded playlists in step with the server, like Plexamp.