Implement app update orchestration (T-402)

app-modern/platform/windows/platform_stub_test.go

@@ -3,8 +3,10 @@
 package windows
 
 import (
+	"context"
 	"errors"
 	"testing"
+	"time"
 
 	"softbox.local/core/application/launch"
 )
@@ -17,6 +19,9 @@ func TestPlatformStubFailsClosed(t *testing.T) {
 	if _, err := platform.IsCompatible("windows-10"); !errors.Is(err, ErrUnsupported) {
 		t.Fatalf("IsCompatible() error = %v, want ErrUnsupported", err)
 	}
+	if err := platform.WaitForExit(context.Background(), "test-app", "C:/test/App.exe", time.Second); !errors.Is(err, ErrUnsupported) {
+		t.Fatalf("WaitForExit() error = %v, want ErrUnsupported", err)
+	}
 	if _, err := platform.Start(launch.Command{}); !errors.Is(err, ErrUnsupported) {
 		t.Fatalf("Start() error = %v, want ErrUnsupported", err)
 	}