ios: better fix for scroll

ios/Packages/Sybil/Sources/Sybil/SybilChatTranscriptView.swift

@@ -5,6 +5,7 @@ struct SybilChatTranscriptView: View {
     var messages: [Message]
     var isLoading: Bool
     var isSending: Bool
+    @State private var hasHandledInitialTranscriptScroll = false
 
     private var hasPendingAssistant: Bool {
         messages.contains { message in
@@ -55,10 +56,11 @@ struct SybilChatTranscriptView: View {
                 scrollToBottom(with: proxy, animated: false)
             }
             .onChange(of: messages.map(\.id)) { _, _ in
-                scrollToBottom(with: proxy, animated: !isLoading)
+                scrollToBottom(with: proxy, animated: hasHandledInitialTranscriptScroll && !isLoading)
+                hasHandledInitialTranscriptScroll = true
             }
             .onChange(of: isSending) { _, _ in
-                scrollToBottom(with: proxy, animated: true)
+                scrollToBottom(with: proxy, animated: hasHandledInitialTranscriptScroll)
             }
         }
     }

ios/Packages/Sybil/Sources/Sybil/SybilWorkspaceView.swift

@@ -24,6 +24,16 @@ struct SybilWorkspaceView: View {
         viewModel.errorMessage != nil
     }
 
+    private var transcriptScrollContextID: String {
+        if viewModel.draftKind == .chat {
+            return "draft-chat"
+        }
+        if case let .chat(chatID) = viewModel.selectedItem {
+            return "chat:\(chatID)"
+        }
+        return "chat:none"
+    }
+
     var body: some View {
         VStack(spacing: 0) {
             if showsHeader {
@@ -53,6 +63,7 @@ struct SybilWorkspaceView: View {
                         isLoading: viewModel.isLoadingSelection,
                         isSending: viewModel.isSending
                     )
+                    .id(transcriptScrollContextID)
                 }
             }
             .frame(maxWidth: .infinity, maxHeight: .infinity)