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/router/__tests__/share-routes.test.ts

@@ -0,0 +1,24 @@
+import { describe, expect, it } from 'vitest';
+
+import routes from '../routes/external/share';
+
+describe('external share routes', () => {
+  it('keeps workflow sharing outside the management layout', () => {
+    const route = routes.find((item) => item.name === 'WorkflowShare');
+
+    expect(route?.path).toBe('/share/workflow');
+    expect(route?.meta).toMatchObject({
+      hideInBreadcrumb: true,
+      hideInMenu: true,
+      hideInTab: true,
+      noBasicLayout: true,
+    });
+  });
+
+  it('provides a standalone workflow share failure page', () => {
+    const route = routes.find((item) => item.name === 'WorkflowShareExpired');
+
+    expect(route?.path).toBe('/share/workflow/expired');
+    expect(route?.meta?.noBasicLayout).toBe(true);
+  });
+});