Session Chat Auto-Scroll Adjustment

Nucleic-Session: 8FCEB1B7-A6C0-44E2-B00A-E4786F41A1FA
Co-authored-by: Nucleic <[email protected]>

NucleicRemote/NucleicRemote/Views/SessionDetailView.swift

@@ -521,16 +521,17 @@ struct TranscriptList: View {
         }
     }
 
-    /// Scroll the last message to the bottom edge; `animated: false` during the open-settle
+    /// Scroll the fixed bottom anchor into view; `animated: false` during the open-settle
     /// window so a chat that's still laying out snaps to the tail instead of easing into place.
-    private func scrollToLast(_ proxy: ScrollViewProxy, animated: Bool = true) {
-        guard let last = items.last else { return }
+    private func scrollToEnd(_ proxy: ScrollViewProxy, animated: Bool = true) {
         if animated {
-            withAnimation { proxy.scrollTo(last.id, anchor: .bottom) }
+            withAnimation { proxy.scrollTo(Self.bottomAnchorID, anchor: .bottom) }
         } else {
-            proxy.scrollTo(last.id, anchor: .bottom)
+            proxy.scrollTo(Self.bottomAnchorID, anchor: .bottom)
         }
     }
+
+    private static let bottomAnchorID = "nucleic.transcript-bottom"
 }
 
 /// The floating "jump to the latest" chevron shown above the chat bar while the user has