fix 修复首次按下esc键导致选中第一个dcu进程的问题

cmd/hytop/tui/main.go

@@ -132,7 +132,11 @@ func NewModelMain(width, height int) ModelMain {
 	result.ProcessInfo = NewModelProcessInfo(width)
 	result.dialog = NewDialog(nil)
 	result.pstree = NewModelPsTree(width, height)
-	result.actionMsg = &ActionMsg{}
+	result.actionMsg = &ActionMsg{
+		HelpView: false,
+		TargetDCUIndex: -1,
+		VM: VMMain,
+	}
 	result.processEnv = nil
 	return result
 }