fix hampack icon

hampack-src/main.go

@@ -13,6 +13,7 @@ import (
 	"strings"
 
 	"github.com/diamondburned/gotk4-adwaita/pkg/adw"
+	"github.com/diamondburned/gotk4/pkg/gdk/v4"
 	"github.com/diamondburned/gotk4/pkg/glib/v2"
 	"github.com/diamondburned/gotk4/pkg/gtk/v4"
 )
@@ -627,6 +628,8 @@ func (w *mainWin) onUpdate() {
 func main() {
 	app := adw.NewApplication("computer.young.HamPack", 0)
 	app.ConnectActivate(func() {
+		iconTheme := gtk.IconThemeGetForDisplay(gdk.DisplayGetDefault())
+		iconTheme.AddSearchPath(filepath.Join(hampackDir(), "desktop", "icons"))
 		gtk.WindowSetDefaultIconName("computer.young.HamPack")
 		newMainWin(app).Present()
 	})