feat: reconnect on disconnect (add status to TUI)

- add `Connected()` method for client
- add `LastErr` field to GoTomatoClient
  - replace error logging by updating `LastErr` field
  - modify methods to use pointer receivers for Client
- add `prevMessage` variable to store the last received server message
- show connect status in TUI
- use EnterAltScreen instead of ClearScreen

internal/websocket/connect.go

@@ -4,7 +4,6 @@ import (
 	"github.com/gorilla/websocket"
 	"time"
 
-	"git.smsvc.net/pomodoro/ChronoTomato/internal/helper"
 	ChronoTomato "git.smsvc.net/pomodoro/ChronoTomato/pkg/models"
 )
 
@@ -13,30 +12,24 @@ type Client ChronoTomato.GoTomatoClient // New websocket client
 // Connects to websocket
 func Connect(url string) Client {
 	conn, _, err := websocket.DefaultDialer.Dial(url, nil)
-	if err != nil {
-		helper.Logger.Fatal("Dial error!", "reason", err)
-	}
 
-	helper.Logger.Info("Connected 󰖟 ", "host", url)
-	time.Sleep(time.Second)
+	return Client{Conn: conn, Server: url, LastErr: err}
+}
 
-	return Client{Conn: conn}
+func (c Client) Connected() bool {
+	return c.Conn != nil
 }
 
 // Disconnects from websocket
 func (c Client) Disconnect() {
-	select {
-	case <-Done:
-		// session closed by remote
-		return
-	default:
-		// Cleanly close the connection by sending a close message and then
-		// waiting (with timeout) for the server to close the connection.
+	// Cleanly close the connection by sending a close message and then
+	// waiting (with timeout) for the server to close the connection.
+	if c.Connected() {
 		c.Conn.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""))
 		select {
 		case <-Done:
 		case <-time.After(time.Second):
 		}
-		return
 	}
+	return
 }