修正讲解列表入口返回规则

tests/unit/hostEnvironment.spec.ts

@@ -1,5 +1,8 @@
 import { afterEach, describe, expect, it, vi } from 'vitest'
-import { isEmbeddedInWechatMiniProgram } from '@/utils/hostEnvironment'
+import {
+  isEmbeddedInWechatMiniProgram,
+  navigateBackToWechatMiniProgram
+} from '@/utils/hostEnvironment'
 
 const createWindow = (overrides: Record<string, unknown> = {}) => ({
   location: { search: '', hash: '' },
@@ -47,3 +50,24 @@ describe('微信小程序宿主环境识别', () => {
     expect(isEmbeddedInWechatMiniProgram()).toBe(false)
   })
 })
+
+describe('小程序宿主返回', () => {
+  it('嵌入态调用小程序 navigateBack', () => {
+    const navigateBack = vi.fn()
+    vi.stubGlobal('window', createWindow({
+      __wxjs_environment: 'miniprogram',
+      wx: { miniProgram: { navigateBack } }
+    }))
+
+    expect(navigateBackToWechatMiniProgram()).toBe(true)
+    expect(navigateBack).toHaveBeenCalledWith({ delta: 1 })
+  })
+
+  it('非嵌入态不会调用小程序返回桥接', () => {
+    const navigateBack = vi.fn()
+    vi.stubGlobal('window', createWindow({ wx: { miniProgram: { navigateBack } } }))
+
+    expect(navigateBackToWechatMiniProgram()).toBe(false)
+    expect(navigateBack).not.toHaveBeenCalled()
+  })
+})