feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

frontend/packages/arch/bot-utils/__tests__/is-mobile.test.ts

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+import { isMobile } from '../src/is-mobile';
+
+describe('is-mobile', () => {
+  const TARGET_WIDTH = 640;
+  test('isMobile with false', () => {
+    vi.stubGlobal('document', {
+      documentElement: {
+        clientWidth: TARGET_WIDTH + 10,
+      },
+    });
+    expect(isMobile()).toBeFalsy();
+  });
+
+  test('isMobile with true', () => {
+    vi.stubGlobal('document', {
+      documentElement: {
+        clientWidth: TARGET_WIDTH - 10,
+      },
+    });
+    expect(isMobile()).toBeTruthy();
+  });
+});