Fix chat rendering and improve input handling for UTF-8 support

cmd/tui/model.go

@@ -210,6 +210,14 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 				})
 			})
 
+			m.client.On(ts3client.EventMessage, func(e *ts3client.MessageEvent) {
+				m.program.Send(chatMsg{
+					senderID:   e.SenderID,
+					senderName: e.SenderName,
+					message:    e.Message,
+				})
+			})
+
 			// Handle incoming audio - play through speakers
 			m.client.On(ts3client.EventAudio, func(e *ts3client.AudioEvent) {
 				if m.audioPlayer != nil {
@@ -325,6 +333,18 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		}
 		return m, nil
 
+	case chatMsg:
+		m.chatMessages = append(m.chatMessages, ChatMessage{
+			Time:    time.Now(),
+			Sender:  msg.senderName,
+			Content: msg.message,
+		})
+		// Keep last 100 messages
+		if len(m.chatMessages) > 100 {
+			m.chatMessages = m.chatMessages[1:]
+		}
+		return m, nil
+
 	case micLevelMsg:
 		// Update microphone level for display
 		m.micLevel = int(msg)
@@ -510,12 +530,23 @@ func (m *Model) handleInputKeys(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 		m.inputText = ""
 	case "backspace":
 		if len(m.inputText) > 0 {
-			m.inputText = m.inputText[:len(m.inputText)-1]
+			// Handle UTF-8 backspace properly
+			runes := []rune(m.inputText)
+			if len(runes) > 0 {
+				m.inputText = string(runes[:len(runes)-1])
+			}
 		}
 	default:
 		// Add character to input
-		if len(msg.String()) == 1 {
-			m.inputText += msg.String()
+		// Allow Runes (including multi-byte like ñ) and Space
+		// Filter out special keys that might send description strings (like "alt+") by ensuring only 1 rune
+		if msg.Type == tea.KeyRunes {
+			runes := []rune(msg.String())
+			if len(runes) == 1 {
+				m.inputText += string(runes)
+			}
+		} else if msg.Type == tea.KeySpace {
+			m.inputText += " "
 		}
 	}
 	return m, nil