修复讲解列表返回分流

tests/unit/WechatMiniProgramBridgeService.spec.ts

@@ -31,6 +31,27 @@ describe('微信小程序 web-view 桥接', () => {
     expect(document.querySelector('[data-wechat-js-sdk="true"]')).toBeNull()
   })
 
+  it('嵌入小程序时通过 navigateBack 返回宿主页', async () => {
+    setEmbeddedRuntime()
+    const { returnToWechatMiniProgram } = await loadService()
+    const navigateBack = vi.fn(({ success }) => success())
+    Object.assign(window, {
+      wx: {
+        miniProgram: {
+          getEnv: (done: (value: { miniprogram: boolean }) => void) => done({ miniprogram: true }),
+          navigateBack
+        }
+      }
+    })
+
+    await expect(returnToWechatMiniProgram()).resolves.toEqual({ status: 'returned' })
+    expect(navigateBack).toHaveBeenCalledWith({
+      delta: 1,
+      success: expect.any(Function),
+      fail: expect.any(Function)
+    })
+  })
+
   it('等待延迟注入的 bridge 后导航到编码后的宿主页', async () => {
     setEmbeddedRuntime()
     const { openWechatMiniProgramLocation } = await loadService()