Add an iPhone client sharing the macOS app's SwiftUI code

mac/Sources/Byre/Panes.swift

@@ -1,4 +1,3 @@
-import AppKit
 import ByreAPI
 import SwiftUI
 
@@ -12,6 +11,7 @@ let tabLabels: [TaskTab: String] = [
     .workflow: "Workflow",
 ]
 
+#if os(macOS)
 struct HalfSplit: Layout {
     func sizeThatFits(proposal: ProposedViewSize, subviews: Subviews, cache: inout ()) -> CGSize {
         proposal.replacingUnspecifiedDimensions()
@@ -71,6 +71,7 @@ struct MainView: View {
         }
     }
 }
+#endif
 
 struct PaneTabButton: View {
     let label: String
@@ -100,6 +101,7 @@ struct PaneTabButton: View {
     }
 }
 
+#if os(macOS)
 private struct LeftPane: View {
     @Environment(Store.self) private var store
     @Environment(Overlays.self) private var overlays
@@ -218,6 +220,7 @@ private struct TaskPane: View {
         }
     }
 }
+#endif
 
 struct TaskTabBody: View {
     let tab: TaskTab
@@ -246,7 +249,7 @@ struct TaskTabBody: View {
     }
 }
 
-private struct TaskBar: View {
+struct TaskBar: View {
     @Environment(Store.self) private var store
     @Environment(Overlays.self) private var overlays
     @Environment(\.paneAccent) private var accent
@@ -361,7 +364,7 @@ private struct PreviewLink: View {
     }
 }
 
-private struct TabStrip: View {
+struct TabStrip: View {
     @Environment(Store.self) private var store
     @Environment(Overlays.self) private var overlays
     @Environment(\.paneAccent) private var accent
@@ -503,7 +506,7 @@ private struct MoreButton: View {
 
 private let emailShape = Re(#"^[^@\s]+@[^@\s]+$"#)
 
-private struct IdentityBanner: View {
+struct IdentityBanner: View {
     @Environment(Store.self) private var store
     @Environment(Overlays.self) private var overlays
     @ViewState private var name: String?
@@ -513,17 +516,18 @@ private struct IdentityBanner: View {
         if let me = store.me, me.gitName.isEmpty || me.gitEmail.isEmpty {
             let gitName = name ?? me.displayName
             let valid = !gitName.isEmpty && emailShape.test(email)
-            HStack(spacing: 6) {
+            let row = touchOnly ? AnyLayout(VStackLayout(alignment: .leading, spacing: 6)) : AnyLayout(HStackLayout(spacing: 6))
+            row {
                 Text("Set the identity agents commit as: ")
                 TextField("Git name", text: Binding(get: { gitName }, set: { name = $0 }))
                     .modifier(FieldStyle())
-                    .frame(width: 220)
+                    .frame(width: touchOnly ? nil : 220)
                     .onSubmit {
                         save(gitName, valid)
                     }
                 TextField("Git email", text: $email)
                     .modifier(FieldStyle())
-                    .frame(width: 260)
+                    .frame(width: touchOnly ? nil : 260)
                     .onSubmit {
                         save(gitName, valid)
                     }