fix: update SSR test mock URL and response format for new icon service

Agent-Logs-Url: https://github.com/antvis/Infographic/sessions/0e61a01a-b243-4a83-abe0-4bdcc7d3506b

Co-authored-by: hustcc <7856674+hustcc@users.noreply.github.com>

Author: Copilot

__tests__/unit/ssr/examples.test.ts

@@ -14,14 +14,12 @@ vi.mock('../../../src/utils/fetch.ts', async (importOriginal) => {
   return {
     ...actual,
     fetchWithCache: vi.fn().mockImplementation((url, init) => {
-      if (typeof url === 'string' && url.includes('/api/open/v1/icon')) {
+      if (typeof url === 'string' && url.includes('/infographic/icon')) {
         return Promise.resolve({
           ok: true,
           json: async () => ({
-            status: true,
-            data: {
-              data: [url.includes('plane') ? plane : earth],
-            },
+            success: true,
+            data: [url.includes('plane') ? plane : earth],
           }),
         });
       }