P4.2: Add Browse button for Command field in job dialog

Add chooseFile helper (dialog.NewFileOpen) in settings_view.go and wrap
the Command entry in job_dialog.go with a Browse button so users can
pick an executable from a file picker instead of typing the path.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/PRE-RELEASE-TASKS.md

@@ -101,8 +101,8 @@ These land together because both edit `domain/job.go` and `storage/store.go`.
 - [x] P3.5 — Queue tests
 
 ### Phase 4 — Notifications + Command browse
-- [ ] P4.1 — Failure notifications
+- [x] P4.1 — Failure notifications
-- [ ] P4.2 — Command Browse button
+- [x] P4.2 — Command Browse button
 
 ### Phase 5 — Icons
 - [ ] P5.1 — Embed small icon + `IconSmall()`

src/app/operations.go

@@ -170,6 +170,15 @@ func (s *Service) SetGlobalPause(paused bool) error {
 	return err
 }
 
+// ShouldNotifyOnFailure reports whether the user has enabled desktop
+// notifications for failed job runs. It reads the config under mu so it is
+// safe to call from any goroutine.
+func (s *Service) ShouldNotifyOnFailure() bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.store.Config.NotifyOnFailure
+}
+
 // UpdateSettings validates and persists a new application configuration. The
 // loaded jobs are re-saved because the jobs directory may have changed, and log
 // cleanup runs so a tightened retention policy takes effect immediately.

src/ui/job_dialog.go

@@ -7,7 +7,9 @@ import (
 	"gitea.mixdep.ru/mix/gosentry/src/domain"
 
 	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/dialog"
+	"fyne.io/fyne/v2/theme"
 	"fyne.io/fyne/v2/widget"
 )
 
@@ -27,6 +29,10 @@ func showJobDialog(w fyne.Window, title string, current job, onSave func(job)) {
 	commandEntry := widget.NewEntry()
 	commandEntry.SetPlaceHolder(`C:\Program Files\App\App.exe`)
 	commandEntry.SetText(current.Command)
+	commandBrowse := widget.NewButtonWithIcon("Browse", theme.FolderOpenIcon(), func() {
+		chooseFile(w, commandEntry)
+	})
+	commandRow := container.NewBorder(nil, nil, nil, commandBrowse, commandEntry)
 	argumentsEntry := widget.NewMultiLineEntry()
 	argumentsEntry.SetPlaceHolder(`D:\Local\Jobs\Auto.ffs_batch`)
 	argumentsEntry.SetText(current.Arguments)
@@ -43,7 +49,7 @@ func showJobDialog(w fyne.Window, title string, current job, onSave func(job)) {
 			widget.NewFormItem("Name", name),
 			widget.NewFormItem("Folder", folderEntry),
 			widget.NewFormItem("Schedule", scheduleEntry),
-			widget.NewFormItem("Command", commandEntry),
+			widget.NewFormItem("Command", commandRow),
 			widget.NewFormItem("Arguments", argumentsEntry),
 			widget.NewFormItem("", startOnly),
 			widget.NewFormItem("", enabled),

src/ui/mainwindow.go

@@ -72,6 +72,15 @@ func newMainView(w fyne.Window) (fyne.CanvasObject, func(time.Duration, bool)) {
 		fyne.Do(func() {
 			if isRecorded {
 				events = append(events, recorded.Record)
+				r := recorded.Record
+				if r.State == "Failed" &&
+					(r.Trigger == "Manual" || r.Trigger == "Schedule") &&
+					svc.ShouldNotifyOnFailure() {
+					fyne.CurrentApp().SendNotification(&fyne.Notification{
+						Title:   "GoSentry: Job Failed",
+						Content: r.JobName + ": " + r.Detail,
+					})
+				}
 			}
 			if isError {
 				events = append(events, newEvent(0, "Service", "Error", errOccurred.Err.Error()))

src/ui/settings_view.go

@@ -172,6 +172,17 @@ func mustParseURL(raw string) *url.URL {
 	return parsed
 }
 
+func chooseFile(w fyne.Window, target *widget.Entry) {
+	fileDialog := dialog.NewFileOpen(func(uri fyne.URIReadCloser, err error) {
+		if err != nil || uri == nil {
+			return
+		}
+		target.SetText(uri.URI().Path())
+	}, w)
+	fileDialog.Resize(fyne.NewSize(900, 640))
+	fileDialog.Show()
+}
+
 func chooseFolder(w fyne.Window, target *widget.Entry) {
 	folderDialog := dialog.NewFolderOpen(func(uri fyne.ListableURI, err error) {
 		if err != nil || uri == nil {