修复讲解页标题与嵌入导航

tests/unit/ExplainHallSelect.spec.ts

@@ -83,7 +83,7 @@ describe('讲解展厅选择列表', () => {
     })
 
     const card = wrapper.get('.hall-overview-card')
-    expect(wrapper.get('.header-title').text()).toBe('展厅讲解')
+    expect(wrapper.get('.header-title').text()).toBe('免费讲解')
     expect(card.attributes('style')).toContain('--hall-card-color: #d9b06c')
     expect(card.text()).toContain('恐龙厅')
     expect(card.text()).not.toContain('Dinosaur Hall')

tests/unit/ExplainListNavigation.spec.ts

@@ -106,13 +106,13 @@ describe('讲解展厅列表返回', () => {
     wrapper.unmount()
   })
 
-  it('独立页在微信嵌入态强制提供 H5 返回，并保留宿主识别参数', async () => {
+  it('微信嵌入态由宿主导航提供标题与返回，不渲染重复的 H5 页头', async () => {
     hostEnvironmentMocks.embeddedInWechatMiniProgram = true
     window.location.hash = '#/pages/explain/list?embedded=wechat-mini-program&weapp=1'
     window.history.replaceState({}, '', window.location.href)
     const wrapper = mountExplainList()
 
-    expect(wrapper.getComponent(ExplainHallSelectStub).props('forceInternalHeader')).toBe(true)
+    expect(wrapper.getComponent(ExplainHallSelectStub).props('forceInternalHeader')).toBe(false)
     await wrapper.get('[data-testid="explain-list-back"]').trigger('click')
 
     expect(uni.navigateBack).not.toHaveBeenCalled()