Scroll to bottom of the lazyVStack when the keyboard opens / input field gains focus in dm and buffer views

This should hopefully avoid the reported bug where a user can't scroll to with voiceover / presumably see their last message until sending another.

KDChat/Views/ChatBufferView.swift

@@ -38,9 +38,16 @@ struct ChatBufferView: View {
                     }
                     .padding()
                 }
+                .onChange(of: isInputFocused) { _, focused in
+                    if focused, let last = messages.last {
+                        proxy.scrollTo(last.persistentModelID, anchor: .bottom)
+                    }
+                }
                 .onChange(of: messages.count) {
                     guard let last = messages.last, last.sessionId == manager.sessionId else { return }
-                    proxy.scrollTo(last.persistentModelID, anchor: .bottom)
+                    Task { @MainActor in
+                        proxy.scrollTo(last.persistentModelID, anchor: .bottom)
+                    }
 
                     let isActive = bufferName == manager.activeBuffer
                     let playBackground = UserDefaults.standard.bool(forKey: "sounds_background_buffers", default: true)

KDChat/Views/DMConversationView.swift

@@ -34,9 +34,16 @@ struct DMConversationView: View {
                     }
                     .padding()
                 }
+                .onChange(of: isInputFocused) { _, focused in
+                    if focused, let last = messages.last {
+                        proxy.scrollTo(last.persistentModelID, anchor: .bottom)
+                    }
+                }
                 .onChange(of: messages.count) {
                     guard let last = messages.last, last.sessionId == manager.sessionId else { return }
-                    proxy.scrollTo(last.persistentModelID, anchor: .bottom)
+                    Task { @MainActor in
+                        proxy.scrollTo(last.persistentModelID, anchor: .bottom)
+                    }
 
                     // Sound
                     if UserDefaults.standard.bool(forKey: "sounds_enabled", default: true),