T1.6: Create src/platform/autostart; move autostart logic

Move autostart_*.go and tests from src/core to src/platform/autostart.
Update src/gui/app.go to call autostart.SetAutostart / autostart.AutostartStatus.
Add quoteDesktopExec to desktop_linux.go (was co-located in autostart_linux.go).

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

src/core/desktop_linux.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strconv"
 )
 
 func InstallDesktopIntegration(appID string, executablePath string, icon []byte) (string, error) {
@@ -40,6 +41,10 @@ StartupWMClass=%s
 	return iconPath, nil
 }
 
+func quoteDesktopExec(path string) string {
+	return strconv.Quote(path)
+}
+
 func xdgDataHome() (string, error) {
 	dataHome := os.Getenv("XDG_DATA_HOME")
 	if dataHome == "" {

src/gui/app.go

@@ -15,6 +15,7 @@ import (
 	"gitea.mixdep.ru/mix/gosentry/assets"
 	"gitea.mixdep.ru/mix/gosentry/src/core"
 	"gitea.mixdep.ru/mix/gosentry/src/domain"
+	"gitea.mixdep.ru/mix/gosentry/src/platform/autostart"
 	"gitea.mixdep.ru/mix/gosentry/src/runner"
 	"gitea.mixdep.ru/mix/gosentry/src/scheduler"
 	"gitea.mixdep.ru/mix/gosentry/src/storage"
@@ -910,7 +911,7 @@ func settingsView(w fyne.Window, store *storage.Store, jobs *[]job) fyne.CanvasO
 	startOnLogin.SetChecked(store.Config.StartOnLogin)
 	autostartStatus := widget.NewLabel("")
 	refreshAutostartStatus := func() {
-		ok, message := core.AutostartStatus(store.Config.StartOnLogin, store.Paths.ExecutablePath)
+		ok, message := autostart.AutostartStatus(store.Config.StartOnLogin, store.Paths.ExecutablePath)
 		if ok {
 			autostartStatus.SetText("OK: " + message)
 			return
@@ -975,7 +976,7 @@ func settingsView(w fyne.Window, store *storage.Store, jobs *[]job) fyne.CanvasO
 			settingsStatus.SetText("Save failed: " + err.Error())
 			return
 		}
-		if err := core.SetAutostart(store.Config.StartOnLogin, store.Paths.ExecutablePath, store.Paths.DesktopIcon); err != nil {
+		if err := autostart.SetAutostart(store.Config.StartOnLogin, store.Paths.ExecutablePath, store.Paths.DesktopIcon); err != nil {
 			refreshAutostartStatus()
 			settingsStatus.SetText("Saved, autostart failed: " + err.Error())
 			return

src/platform/autostart/autostart_linux.go

@@ -1,6 +1,6 @@
 //go:build linux
 
-package core
+package autostart
 
 import (
 	"fmt"

src/platform/autostart/autostart_linux_test.go

@@ -1,6 +1,6 @@
 //go:build linux
 
-package core
+package autostart
 
 import (
 	"os"

src/platform/autostart/autostart_other.go

@@ -1,6 +1,6 @@
 //go:build !windows && !linux
 
-package core
+package autostart
 
 import "fmt"
 

src/platform/autostart/autostart_windows.go

@@ -1,4 +1,4 @@
-package core
+package autostart
 
 import (
 	"fmt"

src/platform/autostart/autostart_windows_test.go

@@ -1,6 +1,6 @@
 //go:build windows
 
-package core
+package autostart
 
 import (
 	"os"