feat: 将工作流分享改为独立页面

- 新增无后台布局的工作流分享与失效路由

- 同步分享地址并保留旧链接兼容

- 补充前后端分享链路测试

easyflow-ui-admin/app/src/utils/__tests__/login-redirect.test.ts

@@ -13,8 +13,8 @@ describe('login redirect', () => {
 
   it('accepts an unencoded workflow share route', () => {
     expect(
-      resolveLoginRedirectPath('/ai/workflow/design?shareKey=workflow-key'),
-    ).toBe('/ai/workflow/design?shareKey=workflow-key');
+      resolveLoginRedirectPath('/share/workflow?shareKey=workflow-key'),
+    ).toBe('/share/workflow?shareKey=workflow-key');
   });
 
   it('uses the first valid query value', () => {