feat: add option to start application minimized

Add the ability to start Fynodoro minimized to system tray via:
- CLI flag: --minimized
- User preference: checkbox in Settings dialog

Either option causes the app to start hidden, accessible via tray menu.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: tomsquest

main.go

@@ -2,6 +2,8 @@
 package main
 
 import (
+	"flag"
+
 	"fyne.io/fyne/v2/app"
 	"github.com/tomsquest/fynodoro/ui"
 )
@@ -14,9 +16,13 @@ var (
 	commitDate string
 )
 
+var startMinimized = flag.Bool("minimized", false, "Start the application minimized to tray")
+
 func main() {
+	flag.Parse()
+
 	myApp := app.NewWithID("com.tomsquest.fynodoro")
 	myApp.SetIcon(ui.AssetIconPng)
 
-	ui.Display(myApp, ui.BuildInfo{version, commit, commitDate})
+	ui.Display(myApp, ui.BuildInfo{version, commit, commitDate}, *startMinimized)
 }

pref/pref.go

@@ -9,6 +9,7 @@ type Pref struct {
 	ShortBreakDuration int
 	LongBreakDuration  int
 	WorkRounds         int
+	StartMinimized     bool
 }
 
 func Load() Pref {
@@ -18,6 +19,7 @@ func Load() Pref {
 		ShortBreakDuration: app.Preferences().IntWithFallback("shortBreakDuration", 5),
 		LongBreakDuration:  app.Preferences().IntWithFallback("longBreakDuration", 15),
 		WorkRounds:         app.Preferences().IntWithFallback("workRounds", 4),
+		StartMinimized:     app.Preferences().BoolWithFallback("startMinimized", false),
 	}
 }
 
@@ -27,4 +29,5 @@ func Save(pref Pref) {
 	app.Preferences().SetInt("shortBreakDuration", pref.ShortBreakDuration)
 	app.Preferences().SetInt("longBreakDuration", pref.LongBreakDuration)
 	app.Preferences().SetInt("workRounds", pref.WorkRounds)
+	app.Preferences().SetBool("startMinimized", pref.StartMinimized)
 }

ui/settings.go

@@ -74,17 +74,24 @@ func makeForm() *widget.Form {
 	_ = workRoundsBinding.Set(myPref.WorkRounds)
 	form.AppendItem(newIntegerFormItem(workRoundsBinding, "Work rounds", "Set how many Work rounds before a long break. Default is: %d. 0 to disable.", NewRangeValidator(0, 999)))
 
+	startMinimizedBinding := binding.NewBool()
+	_ = startMinimizedBinding.Set(myPref.StartMinimized)
+	startMinimizedCheck := widget.NewCheckWithData("Start minimized to tray", startMinimizedBinding)
+	form.AppendItem(widget.NewFormItem("", startMinimizedCheck))
+
 	form.OnSubmit = func() {
 		workDuration, _ := workDurationBinding.Get()
 		shortBreakDuration, _ := shortBreakDurationBinding.Get()
 		longBreakDuration, _ := longBreakDurationBinding.Get()
 		workRounds, _ := workRoundsBinding.Get()
+		startMinimized, _ := startMinimizedBinding.Get()
 
 		newPref := pref.Pref{
-			workDuration,
-			shortBreakDuration,
-			longBreakDuration,
-			workRounds,
+			WorkDuration:       workDuration,
+			ShortBreakDuration: shortBreakDuration,
+			LongBreakDuration:  longBreakDuration,
+			WorkRounds:         workRounds,
+			StartMinimized:     startMinimized,
 		}
 		pref.Save(newPref)
 	}

ui/ui.go

@@ -19,7 +19,7 @@ type BuildInfo struct {
 	CommitDate string
 }
 
-func Display(app fyne.App, buildInfo BuildInfo) {
+func Display(app fyne.App, buildInfo BuildInfo, cliStartMinimized bool) {
 	myPref := pref.Load()
 	thePomodoro := pomodoro.NewPomodoro(&pomodoro.Params{
 		WorkDuration:       time.Duration(myPref.WorkDuration) * time.Minute,
@@ -44,7 +44,11 @@ func Display(app fyne.App, buildInfo BuildInfo) {
 		desk.SetSystemTrayMenu(trayMenu)
 	}
 
-	mainWindow.ShowAndRun()
+	if cliStartMinimized || myPref.StartMinimized {
+		app.Run()
+	} else {
+		mainWindow.ShowAndRun()
+	}
 }
 
 func makeAboutWindow(app fyne.App, buildInfo BuildInfo) fyne.Window {