Adds keychain support

kordophone2/Transcript/TranscriptDisplayItemViews.swift

@@ -71,16 +71,51 @@ struct ImageItemView: View
     @State private var img: NSImage?
     @Environment(\.xpcClient) var xpcClient
     
+    @State private var containerWidth: CGFloat? = nil
+    
+    var aspectRatio: CGFloat {
+        if let size = attachment.size, size.height > 0 {
+            return size.width / size.height
+        } else {
+            return 1.0
+        }
+    }
+    
+    var preferredSize: CGSize {
+        return CGSize(
+            width: preferredWidth,
+            height: preferredWidth / aspectRatio
+        )
+    }
+    
+    var preferredWidth: CGFloat {
+        if let containerWidth, let attachmentWidth = attachment.size?.width {
+            return CGFloat.minimum(containerWidth, attachmentWidth)
+        } else if let containerWidth {
+            return containerWidth
+        } else {
+            return 200.0 // fallback
+        }
+    }
+        
     var body: some View {
         BubbleView(isFromMe: isFromMe) {
             if let img {
                 Image(nsImage: img)
                     .resizable()
                     .scaledToFit()
+                    .frame(
+                        maxWidth: containerWidth
+                    )
             } else {
-                ProgressView()
+                Rectangle()
+                    .fill(.gray)
+                    
             }
         }
+        .onGeometryChange(for: CGFloat.self,
+                          of: { $0.size.width },
+                          action: { containerWidth = $0 })
         .task {
             do {
                 let handle = try await xpcClient.openAttachmentFileHandle(