feat: update settings handling for pomodoro configuration

- add `UpdateSettings()` to update pomodoro configuration
- refactor client command handling to use `UpdateSettings()`

🤖

internal/websocket/client_commands.go

@@ -49,11 +49,7 @@ func handleClientCommands(ws *websocket.Conn) {
 				}
 			case "updateSettings":
 				if !pomodoro.IsPomodoroOngoing() {
-					if clientCommand.Settings != (models.PomodoroConfig{}) {
-						shared.Message.Settings = clientCommand.Settings
-						shared.Message.TimeLeft = clientCommand.Settings.Work
-					}
-
+					pomodoro.UpdateSettings(clientCommand.Settings)
 				}
 			}
 		}