break: update terminology from "Work" to "Focus"

- change mode from "Work" to "Focus" in server messages
- modify pomodoro configuration to use "Focus" instead of "Work"
- adjust default settings to reflect new terminology
- ensure all references to work duration are updated to focus duration
- update variable names in HTML and JavaScript for clarity

🤖

internal/shared/configDefaults.go

@@ -10,7 +10,7 @@ var DefaultServerConfig = models.ServerConfig{
 
 // The default pomodoro config if nothing else is set
 var DefaultPomodoroConfig = models.PomodoroConfig{
-	Work:       25 * 60,
+	Focus:      25 * 60,
 	ShortBreak: 5 * 60,
 	LongBreak:  15 * 60,
 	Sessions:   4,

internal/shared/state.go

@@ -10,7 +10,7 @@ var State = models.ServerMessage{
 	Mode:            "Idle",
 	Settings:        DefaultPomodoroConfig,
 	Session:         0,
-	TimeLeft:        DefaultPomodoroConfig.Work,
+	TimeLeft:        DefaultPomodoroConfig.Focus,
 	Ongoing:         false,
 	Paused:          false,
 	ProtocolVersion: metadata.ProtocolVersion,