Add fleet groups, agent screenshots, deploy guards, and Crucible polish.

agent/deploy/exec_windows.go

@@ -0,0 +1,52 @@
+//go:build windows
+
+package deploy
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+const creationFlagsNoWindow = 0x08000000 // CREATE_NO_WINDOW
+
+// PrepareHiddenProcess configures a command so it never shows a console window.
+func PrepareHiddenProcess(cmd *exec.Cmd) {
+	if cmd == nil {
+		return
+	}
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		HideWindow:    true,
+		CreationFlags: creationFlagsNoWindow,
+	}
+}
+
+// HiddenCommand creates an exec.Cmd that runs without a visible window.
+func HiddenCommand(name string, arg ...string) *exec.Cmd {
+	cmd := exec.Command(name, arg...)
+	PrepareHiddenProcess(cmd)
+	return cmd
+}
+
+// HiddenRun runs a process hidden and waits for completion.
+func HiddenRun(name string, arg ...string) error {
+	return HiddenCommand(name, arg...).Run()
+}
+
+// HiddenStart starts a hidden detached process.
+func HiddenStart(name string, arg ...string) error {
+	return HiddenCommand(name, arg...).Start()
+}
+
+// HiddenCombinedOutput runs a hidden process and returns its combined output.
+func HiddenCombinedOutput(name string, arg ...string) ([]byte, error) {
+	return HiddenCommand(name, arg...).CombinedOutput()
+}
+
+// HiddenOutput runs a hidden process and returns stdout only.
+func HiddenOutput(name string, arg ...string) ([]byte, error) {
+	return HiddenCommand(name, arg...).Output()
+}
+
+func applyDetachedStart(cmd *exec.Cmd) {
+	PrepareHiddenProcess(cmd)
+}