fix: 调整 Sprite 加载处理函数公共导出

- 通过 common 公共入口导出 createSpriteLoadHandler
- 移除触发构建导出检查失败的深路径重新导出
- 补充公共入口导出测试

AI-GEN: 90% gpt5.6-luna

Author: xiongjiaojiao

src/common/index.common.js

@@ -753,4 +753,5 @@ export { KeyServiceParameter, SecurityManager, ServerInfo, TokenServiceParameter
 export { CartoCSS, ThemeStyle };
 export { ElasticSearch };
 export { Lang };
-export { KnowledgeGraph } from './overlay/KnowledgeGraph';
+export { KnowledgeGraph } from './overlay/KnowledgeGraph';
+export { createSpriteLoadHandler } from './mapping/WebMapV3';

src/mapboxgl/mapping/index.js

@@ -1,4 +1,3 @@
 export { WebMap } from './WebMap';
 export { initMap } from './InitMap';
 export { VideoMap } from './VideoMap';
-export { createSpriteLoadHandler } from '@supermapgis/iclient-common/mapping/WebMapV3';

test/common/mapping/WebMapV3Spec.js

@@ -1,5 +1,6 @@
 import { createWebMapV3Extending } from '../../../src/common/mapping/WebMapV3';
 import { createSpriteLoadHandler } from '../../../src/common/mapping';
+import { createSpriteLoadHandler as createPublicSpriteLoadHandler } from '../../../src/common/index.common';
 import { createWebMapBaseExtending } from '../../../src/common/mapping/WebMapBase';
 import { Events } from '../../../src/common/commontypes';
 
@@ -135,6 +136,7 @@ describe('WebMapV3 - addLocalIdeographFontFamily', () => {
     it('should be exported for external WebApps', () => {
       expect(createSpriteLoadHandler('3.3.7')).toEqual(jasmine.any(Function));
       expect(createSpriteLoadHandler('3.3.8')).toBeUndefined();
+      expect(createPublicSpriteLoadHandler).toBe(createSpriteLoadHandler);
     });
 
     it('should flip line sprites for maps at version 3.3.7', () => {