Chat view cleanup

Replace `waitingForReply` and the `status` string with the `state`
variable.

pkg/tui/views/chat/update.go

@@ -142,17 +142,15 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 
 		m.updateContent()
 	case msgResponseEnd:
-		m.waitingForReply = false
+		m.state = idle
 		last := len(m.messages) - 1
 		if last < 0 {
 			panic("Unexpected empty messages handling msgResponseEnd")
 		}
 		m.setMessageContents(last, strings.TrimSpace(m.messages[last].Content))
 		m.updateContent()
-		m.status = "Press ctrl+s to send"
 	case msgResponseError:
-		m.waitingForReply = false
-		m.status = "Press ctrl+s to send"
+		m.state = idle
 		m.State.Err = error(msg)
 		m.updateContent()
 	case msgConversationTitleGenerated:
@@ -162,7 +160,7 @@ func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
 			cmds = append(cmds, m.updateConversationTitle(m.conversation))
 		}
 	case cursor.BlinkMsg:
-		if m.waitingForReply {
+		if m.state == pendingResponse {
 			// ensure we show the updated "wait for response" cursor blink state
 			m.updateContent()
 		}