fix: 修复freed面板的一些bug

demoV2/Layouter/GeneralizedList.js

@@ -105,6 +105,8 @@ SV.registerLayouter('GeneralizedList', {
                 }
             },
             link: {
+                loopSub: {},
+                loopNext: {},
                 sub: {
                     type: 'line',
                     sourceAnchor: 2,

demoV2/Layouter/LinkList.js

@@ -18,7 +18,7 @@ SV.registerLayouter('LinkList', {
             element: { 
                 default: {
                     type: 'link-list-node',
-                    label: '[id]',
+                    label: '[data]',
                     size: [60, 30],
                     style: {
                         stroke: '#333',

demoV2/Layouter/Stack.js

@@ -32,18 +32,27 @@ SV.registerLayouter('Stack', {
                     }
                 }
             },
-            pointer: {
+            marker: {
                 external: {
+                    type: 'pointer',
                     anchor: 1,
                     style: {
                         fill: '#f08a5d'
                     }
                 },
                 bottomExternal: {
+                    type: 'pointer',
                     anchor: 2,
                     style: {
                         fill: '#f08a5d'
                     }
+                },
+                cursor: {
+                    type: 'cursor',
+                    anchor: 1,
+                    style: {
+                        fill: '#f08a5d'
+                    }
                 }
             },
             layout: {