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

cmd/client/view.go

@@ -3,22 +3,29 @@ package client
 import (
 	"strings"
 
+	"github.com/alecthomas/colour"
+
 	"git.smsvc.net/pomodoro/ChronoTomato/cmd/client/helper"
 	GoTomato "git.smsvc.net/pomodoro/GoTomato/pkg/models"
 )
 
 func (a app) View() string {
 	var body string
+	var serverStatus string
 
+	body = "Waiting for server message..."
 	if a.pomodoro != (GoTomato.ServerMessage{}) {
 		body = helper.TerminalOutput(a.pomodoro)
 		helper.DesktopNotifications(a.pomodoro)
-	} else {
-		body = "Waiting for first server message..."
+	}
+
+	serverStatus = colour.Sprintf("^D^1disconnected: %v^R\n", client.LastErr)
+	if client.Connected() {
+		serverStatus = colour.Sprintf("^D^2connected to %s^R\n", client.Server)
 	}
 
 	helpView := a.help.View(a.keys)
-	height := 8 - strings.Count(body, "\n") - strings.Count(helpView, "\n")
+	height := 8 - strings.Count(body, "\n") - strings.Count(serverStatus, "\n") - strings.Count(helpView, "\n")
 
-	return body + strings.Repeat("\n", height) + helpView
+	return body + strings.Repeat("\n", height) + serverStatus + helpView
 }