Fixed message loading

Root messages weren't being loaded since the refactor, and there was
dead code

pkg/tui/views/chat/update.go

@@ -94,17 +94,11 @@ func (m Model) Update(msg tea.Msg) (shared.ViewModel, tea.Cmd) {
 				}
 			}
 		}
-	case msgConversationLoaded:
-		m.App.Conversation = msg.conversation
+	case msgConversationMessagesLoaded:
 		m.App.RootMessages = msg.rootMessages
-		m.selectedMessage = -1
-		if len(m.App.RootMessages) > 0 {
-			cmds = append(cmds, m.loadConversationMessages())
-		}
-	case msgMessagesLoaded:
-		m.App.Messages = msg
+		m.App.Messages = msg.messages
 		if m.selectedMessage == -1 {
-			m.selectedMessage = len(msg) - 1
+			m.selectedMessage = len(msg.messages) - 1
 		} else {
 			m.selectedMessage = min(m.selectedMessage, len(m.App.Messages))
 		}