fix: 保留工作流列表返回状态

- 记录页码、分类和搜索条件并同步到路由

- 从工作流设计页返回时恢复原列表位置

easyflow-ui-admin/app/src/router/__tests__/detail-return-navigation.test.ts

@@ -31,6 +31,20 @@ describe('detail return navigation', () => {
     expect(listSource).toContain('tab: activeTab.value');
   });
 
+  it('returns workflow design to the originating list page and filters', () => {
+    const detailSource = readViewSource('ai/workflow/WorkflowDesign.vue');
+    const listSource = readViewSource('ai/workflow/WorkflowList.vue');
+
+    expect(detailSource).toContain(
+      'parseWorkflowDesignReturnState(route.query)',
+    );
+    expect(detailSource).toContain(
+      'query: buildWorkflowListRouteQuery(listState)',
+    );
+    expect(listSource).toContain('buildWorkflowDesignReturnQuery');
+    expect(listSource).toContain('getPageState');
+  });
+
   it('returns plugin tool editing to its plugin tool list with a safe fallback', () => {
     const editSource = readViewSource('ai/plugin/PluginToolEdit.vue');
     const listSource = readViewSource('ai/plugin/PluginToolTable.vue');