fix：MD图例，沿用地图时，显示了不该显示的图例（MS添加图层后不操作图例，showLegend属性不存在）

AI-GEN: 100% gpt-6-luna

Author: chenxianhuii

src/common/mapping/WebMapV3.js

@@ -402,7 +402,7 @@ export function createWebMapV3Extending(SuperClass, { MapManager, mapRepo, crsMa
     }
     if (catalogType === 'layer') {
       res.push({
-        showLegend: showLegend !== false,
+        showLegend: showLegend === true,
         id: id,
         title: title
       });

test/common/mapping/WebMapV3Spec.js

@@ -213,7 +213,7 @@ describe('WebMapV3 - _getLegendInfos', () => {
       ]);
     });
 
-    it('should default showLegend to true when undefined', () => {
+    it('should default showLegend to false when undefined', () => {
       instance._mapResourceInfo = {
         catalogs: [
           {
@@ -227,7 +227,7 @@ describe('WebMapV3 - _getLegendInfos', () => {
       const result = instance._getLegendInfos();
 
       expect(result).toEqual([
-        { showLegend: true, id: 'layer1', title: 'Layer1' }
+        { showLegend: false, id: 'layer1', title: 'Layer1' }
       ]);
     });
 
@@ -245,7 +245,7 @@ describe('WebMapV3 - _getLegendInfos', () => {
       const result = instance._getLegendInfos();
 
       expect(result).toEqual([
-        { showLegend: true, id: 'layer1', title: 'Layer1' }
+        { showLegend: false, id: 'layer1', title: 'Layer1' }
       ]);
     });
 
@@ -349,7 +349,7 @@ describe('WebMapV3 - _getLegendInfos', () => {
       ]);
     });
 
-    it('should default showLegend to true when not specified', () => {
+    it('should default showLegend to false when not specified', () => {
       const res = [];
       const catalog = {
         catalogType: 'layer',
@@ -360,7 +360,7 @@ describe('WebMapV3 - _getLegendInfos', () => {
       instance._getLegendInfoByCatalog(catalog, res);
 
       expect(res).toEqual([
-        { showLegend: true, id: 'testLayer', title: 'TestLayer' }
+        { showLegend: false, id: 'testLayer', title: 'TestLayer' }
       ]);
     });