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

mac/Sources/Byre/Files.swift

@@ -380,14 +380,14 @@ private struct FileImage: View {
     let path: String
     let load: Int
     @Environment(Store.self) private var store
-    @ViewState private var image: NSImage?
+    @ViewState private var image: PlatformImage?
     @ViewState private var error = ""
 
     var body: some View {
         Group {
             if let image {
                 ScrollView {
-                    Image(nsImage: image)
+                    Image(platformImage: image)
                         .resizable()
                         .scaledToFit()
                         .frame(maxWidth: image.size.width, maxHeight: image.size.height)
@@ -408,7 +408,7 @@ private struct FileImage: View {
         .task(id: load) {
             do {
                 let data = try await ImageCache.fetch(.worktree(taskId: taskId, path: path), store.api)
-                guard let img = NSImage(data: data) else {
+                guard let img = PlatformImage(data: data) else {
                     image = nil
                     error = "Not a readable image."
                     return