fix: 修复分享链接路由与登录回跳

- 统一生成包含部署基路径和 Hash 路由的知识库、工作流分享地址

- 未登录访问分享页时保留目标地址，并在登录成功后自动回跳

- 限定分享密钥作用域并补充失效、加载失败及回归测试

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

@@ -0,0 +1,34 @@
+import { describe, expect, it } from 'vitest';
+
+import { resolveLoginRedirectPath } from '#/utils/login-redirect';
+
+describe('login redirect', () => {
+  it('restores an encoded knowledge share route', () => {
+    expect(
+      resolveLoginRedirectPath(
+        encodeURIComponent('/share/knowledge?shareKey=knowledge-key'),
+      ),
+    ).toBe('/share/knowledge?shareKey=knowledge-key');
+  });
+
+  it('accepts an unencoded workflow share route', () => {
+    expect(
+      resolveLoginRedirectPath('/ai/workflow/design?shareKey=workflow-key'),
+    ).toBe('/ai/workflow/design?shareKey=workflow-key');
+  });
+
+  it('uses the first valid query value', () => {
+    expect(
+      resolveLoginRedirectPath([
+        undefined,
+        encodeURIComponent('/share/knowledge?shareKey=knowledge-key'),
+      ]),
+    ).toBe('/share/knowledge?shareKey=knowledge-key');
+  });
+
+  it('rejects external and malformed redirects', () => {
+    expect(resolveLoginRedirectPath('https://example.test')).toBeNull();
+    expect(resolveLoginRedirectPath('//example.test/path')).toBeNull();
+    expect(resolveLoginRedirectPath('%E0%A4%A')).toBeNull();
+  });
+});