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

mac/Sources/Byre/Chat.swift

@@ -1,4 +1,3 @@
-import AppKit
 import ByreAPI
 import SwiftUI
 
@@ -175,12 +174,21 @@ final class ChatModel {
                 self?.builder.appendDelta(ev)
             }
         })
+        #if os(macOS)
         activeObserver = NotificationCenter.default.addObserver(of: NSApplication.self, for: .didBecomeActive) { [weak self] _ in
             self?.markShown()
         }
         keyObserver = NotificationCenter.default.addObserver(of: NSWindow.self, for: .didBecomeKey) { [weak self] _ in
             self?.markShown()
         }
+        #else
+        activeObserver = NotificationCenter.default.addObserver(of: UIApplication.self, for: .didBecomeActive) { [weak self] _ in
+            self?.markShown()
+        }
+        offs.append(store.paneFocus.shown.add { [weak self] _ in
+            self?.markShown()
+        })
+        #endif
     }
 
     func stop() {
@@ -225,7 +233,7 @@ final class ChatModel {
     }
 
     private func markShown() {
-        guard let taskId, store.paneFocus.windowKey else {
+        guard let taskId, store.paneFocus.taskVisible else {
             return
         }
         for seq in visibleSummaries {
@@ -460,7 +468,7 @@ final class ChatModel {
             var imgs: [PendingImage] = []
             for id in p.imageIds {
                 let data = try await ImageCache.fetch(.blob(id), store.api)
-                guard let image = NSImage(data: data) else {
+                guard let image = PlatformImage(data: data) else {
                     throw ApiError(status: 0, message: "not an image")
                 }
                 imgs.append(PendingImage(data: data, image: image))
@@ -903,34 +911,59 @@ struct StatusButton: View {
     }
 }
 
-private struct Scanner: NSViewRepresentable {
+@MainActor
+private struct Scanner {
     let color: Color
 
+    func update(_ v: ScannerView, _ environment: EnvironmentValues) {
+        let c = color.resolve(in: environment).cgColor
+        let clear = c.copy(alpha: 0)!
+        CATransaction.begin()
+        CATransaction.setDisableActions(true)
+        v.glow.colors = [clear, c, clear]
+        CATransaction.commit()
+    }
+}
+
+#if os(macOS)
+extension Scanner: NSViewRepresentable {
     func makeNSView(context: Context) -> ScannerView {
         ScannerView()
     }
 
     func updateNSView(_ v: ScannerView, context: Context) {
-        let c = NSColor(color)
-        CATransaction.begin()
-        CATransaction.setDisableActions(true)
-        v.glow.colors = [c.withAlphaComponent(0).cgColor, c.cgColor, c.withAlphaComponent(0).cgColor]
-        CATransaction.commit()
+        update(v, context.environment)
     }
 }
+#else
+extension Scanner: UIViewRepresentable {
+    func makeUIView(context: Context) -> ScannerView {
+        ScannerView()
+    }
 
-private final class ScannerView: NSView {
+    func updateUIView(_ v: ScannerView, context: Context) {
+        update(v, context.environment)
+    }
+}
+#endif
+
+private final class ScannerView: PlatformView {
     let glow = CAGradientLayer()
 
-    override init(frame: NSRect) {
+    override init(frame: CGRect) {
         super.init(frame: frame)
+        #if os(macOS)
         wantsLayer = true
+        let host = layer!
+        #else
+        let host = layer
+        #endif
         let dots = CALayer()
         dots.frame = CGRect(x: 0, y: 0, width: 84, height: 2)
         for x in stride(from: 0.0, through: 80, by: 5) {
             let dot = CALayer()
             dot.frame = CGRect(x: x, y: 0, width: 2, height: 2)
-            dot.backgroundColor = NSColor.black.cgColor
+            dot.backgroundColor = CGColor(gray: 0, alpha: 1)
             dots.addSublayer(dot)
         }
         glow.bounds = CGRect(x: 0, y: 0, width: 30, height: 2)
@@ -941,7 +974,7 @@ private final class ScannerView: NSView {
         strip.frame = dots.frame
         strip.mask = dots
         strip.addSublayer(glow)
-        layer?.addSublayer(strip)
+        host.addSublayer(strip)
         let sweep = CABasicAnimation(keyPath: "position.x")
         sweep.fromValue = 15
         sweep.toValue = 69
@@ -987,7 +1020,7 @@ private struct PendingView: View {
                 if !pending.images.isEmpty {
                     FlowLayout(spacing: 6) {
                         ForEach(pending.images) { img in
-                            Image(nsImage: img.image)
+                            Image(platformImage: img.image)
                                 .resizable()
                                 .scaledToFit()
                                 .frame(maxWidth: 240, maxHeight: 180)