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+# 讲解流独立页面拆分 Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** 将讲解流从单页 `stage` 状态机拆分为展厅列表页、业务单元列表页、讲解点列表页三个真实路由页面，使嵌入小程序时标题与返回都跟随页面层级工作。
+
+**Architecture:** 保留现有 `explainUseCase` / repository 数据边界，页面层拆开但组件层短期继续复用 `ExplainHallSelect.vue`。`pages/explain/list.vue` 收敛为展厅列表页，新增 `business-unit-list.vue` 与 `guide-stop-list.vue` 分别承载业务单元和讲解点，详情页继续沿用 `pages/exhibit/detail.vue`。
+
+**Tech Stack:** uni-app、Vue 3 `<script setup>`、TypeScript、SCSS、现有 explain use case/repository/view-model 层
+
+## Global Constraints
+
+- 嵌入小程序时，宿主标题和返回行为与页面层级一致。
+- 普通 H5 中现有讲解流视觉风格和交互尽量保持不变。
+- 继续复用当前 explain use case / repository 数据边界，不引入新的页面直接数据耦合。
+- 讲解点进入 `pages/exhibit/detail` 的既有详情能力保持可用。
+- 不重做讲解详情页的数据模型或播放器架构。
+- 不改造 explain 数据来源边界。
+- 不新增小程序宿主桥接协议。
+- 不重构 `ExplainHallSelect.vue` 为多个纯展示组件，除非实现时为降低复杂度必须做最小拆分。
+- 标题规则固定为：展厅列表页 `讲解`，业务单元列表页 `当前展厅名`，讲解点列表页 `当前业务单元名`。
+- 返回链路固定为：讲解点列表 → 业务单元列表 → 展厅列表 → 讲解首页/入口页。
+- 当前项目没有独立 `test` 脚本，验证以 `pnpm type-check`、`pnpm lint`、`pnpm build:h5` 和 H5 手工回归为准。
+
+---
+
+### Task 1: 收敛讲解首页入口，改为展厅列表独立页跳转
+
+**Files:**
+- Modify: `src/pages/index/index.vue`
+- Modify: `src/pages/explain/list.vue`
+- Test: `src/pages/index/index.vue`（手工回归入口）
+
+**Interfaces:**
+- Consumes:
+  - `explainUseCase.loadExplainHalls(): Promise<MuseumHall[]>`
+  - `explainUseCase.loadExplainHallSummaries(hallIds: string[]): Promise<Record<string, ExplainHallSummary>>`
+  - `navigateToGuideTopTab(tab: GuideTopTab): void`
+- Produces:
+  - 首页讲解 Tab 点击展厅时调用 `uni.navigateTo({ url: '/pages/explain/list' })` 或直接在独立页内部继续流转
+  - `src/pages/explain/list.vue` 仅暴露展厅列表行为，不再承担 `unit` / `stop` 状态切换
+
+- [ ] **Step 1: 阅读并锁定当前讲解入口代码**
+
+阅读以下代码块并记录要删除或迁移的行为：
+
+```ts
+// src/pages/index/index.vue
+const explainHallItems = ref<ExplainHallSelectItem[]>([])
+const explainBusinessUnits = ref<ExplainBusinessUnit[]>([])
+const explainStage = ref<ExplainSelectStage>('hall')
+const selectedExplainHallId = ref('')
+const selectedExplainBusinessUnitId = ref('')
+```
+
+重点确认：
+- `ExplainHallSelect` 在首页 explain Tab 中被直接渲染
+- `handleExplainHallClick / handleExplainBusinessUnitClick / handleExplainGuideStopClick / handleExplainBack` 仍由首页维护
+
+- [ ] **Step 2: 先写实现后验证“首页 explain Tab 点击展厅跳独立页”的手工检查点**
+
+将以下检查点写进任务注释或临时核对清单，不写入生产代码：
+
+```text
+入口回归预期：
+1. 首页切到讲解 Tab，仍能看到展厅列表
+2. 点击任一展厅，不再在首页内部切到业务单元 stage
+3. 而是跳转到 /pages/explain/business-unit-list
+```
+
+- [ ] **Step 3: 将首页 explain Tab 的点击行为改为页面跳转**
+
+把首页 explain 逻辑从“内部 stage 切换”改为“跳到独立页”。保留 explain Tab 首屏展厅列表展示，但去掉首页中业务单元和讲解点的状态推进逻辑。实现目标示意：
+
+```ts
+const handleExplainHallClick = async (hallId: string) => {
+  const hall = explainHallItems.value.find((item) => item.id === hallId)
+  const params = new URLSearchParams({
+    hallId,
+    hallName: hall?.name || '讲解'
+  })
+
+  uni.navigateTo({
+    url: `/pages/explain/business-unit-list?${params.toString()}`
+  })
+}
+```
+
+同时移除首页中对以下逻辑的业务依赖：
+
+```ts
+explainStage.value = 'unit'
+selectedExplainBusinessUnitId.value = ''
+selectedExplainBusinessUnitName.value = ''
+```
+
+并把 `handleExplainBusinessUnitClick` / `handleExplainBack` 调整为不再驱动首页内部多级状态。
+
+- [ ] **Step 4: 收敛 `pages/explain/list.vue` 为展厅列表页**
+
+删除 `src/pages/explain/list.vue` 中仅为单页多阶段服务的逻辑，目标代码形态示意：
+
+```ts
+const explainHallItems = ref<ExplainHallSelectItem[]>([])
+const explainLoading = ref(false)
+const explainError = ref('')
+
+const handleExplainHallClick = (hallId: string) => {
+  const hall = explainHallItems.value.find((item) => item.id === hallId)
+  const params = new URLSearchParams({
+    hallId,
+    hallName: hall?.name || '讲解'
+  })
+
+  uni.navigateTo({
+    url: `/pages/explain/business-unit-list?${params.toString()}`
+  })
+}
+```
+
+模板里只保留：
+
+```vue
+<ExplainHallSelect
+  :halls="explainHallItems"
+  stage="hall"
+  :loading="explainLoading"
+  :error="explainError"
+  @hall-click="handleExplainHallClick"
+  @back="handleBack"
+/>
+```
+
+移除 `business-units`、`guide-stops`、`selected-*`、`history.pushState/popstate` 相关逻辑。
+
+- [ ] **Step 5: 运行类型检查验证页面收敛没有破坏现有引用**
+
+Run: `pnpm type-check`
+Expected: exit 0，`pages/index/index.vue` 与 `pages/explain/list.vue` 不再报 `ExplainSelectStage` / `selectedExplainBusinessUnit` 等已删除字段错误
+
+- [ ] **Step 6: 提交**
+
+```bash
+git add src/pages/index/index.vue src/pages/explain/list.vue
+git commit -m "refactor: split explain hall entry from home tab"
+```
+
+### Task 2: 新增业务单元列表页并接管展厅级标题与返回
+
+**Files:**
+- Create: `src/pages/explain/business-unit-list.vue`
+- Modify: `src/pages.json`
+- Test: `src/pages/explain/business-unit-list.vue`
+
+**Interfaces:**
+- Consumes:
+  - `explainUseCase.loadTemporaryBusinessUnitsByHall(hallId: string): Promise<ExplainBusinessUnit[]>`
+  - `ExplainHallSelect.vue` 的 `stage="unit"` 展示模式
+- Produces:
+  - 新页面路由：`/pages/explain/business-unit-list?hallId=<id>&hallName=<name>`
+  - 页面级标题设置函数：`syncPageTitle(title: string): void`
+  - 页面级返回：`goBackToExplainHallList(): void`
+
+- [ ] **Step 1: 在 `pages.json` 注册新页面**
+
+新增页面配置：
+
+```json
+{
+  "path": "pages/explain/business-unit-list",
+  "style": {
+    "navigationBarTitleText": "业务单元",
+    "navigationBarBackgroundColor": "#FFFFFF",
+    "navigationStyle": "custom"
+  }
+}
+```
+
+插入位置紧跟 `pages/explain/list`，保持 explain 路由集中。
+
+- [ ] **Step 2: 创建业务单元页骨架并先放失败态/空态兜底**
+
+创建 `src/pages/explain/business-unit-list.vue`，先写最小骨架：
+
+```vue
+<template>
+  <GuidePageFrame
+    active-tab="explain"
+    variant="static"
+    :show-top-tabs="false"
+    show-back
+    @tab-change="handleTopTabChange"
+    @back="handleBack"
+  >
+    <view class="explain-business-unit-page">
+      <ExplainHallSelect
+        :business-units="explainBusinessUnitItems"
+        stage="unit"
+        :selected-hall-name="selectedExplainHallName"
+        :loading="explainLoading"
+        :error="explainError"
+        @business-unit-click="handleExplainBusinessUnitClick"
+        @back="handleBack"
+      />
+    </view>
+  </GuidePageFrame>
+</template>
+```
+
+- [ ] **Step 3: 实现参数解析、标题同步与数据加载**
+
+在脚本中实现以下最小接口：
+
+```ts
+const selectedExplainHallId = ref('')
+const selectedExplainHallName = ref('')
+const explainBusinessUnits = ref<ExplainBusinessUnit[]>([])
+const explainLoading = ref(false)
+const explainError = ref('')
+
+const explainBusinessUnitItems = computed<ExplainBusinessUnitSelectItem[]>(() => (
+  explainBusinessUnits.value.map((unit) => ({
+    id: unit.id,
+    name: unit.name,
+    hallId: unit.hallId,
+    previewImageUrl: unit.previewImageUrl,
+    guideStopCount: unit.guideStopCount
+  }))
+))
+
+const syncPageTitle = (title: string) => {
+  uni.setNavigationBarTitle({ title })
+  if (typeof document !== 'undefined') document.title = title
+}
+```
+
+`onLoad` 内实现：
+
+```ts
+onLoad(async (options: any = {}) => {
+  const hallId = Array.isArray(options.hallId) ? options.hallId[0] : options.hallId
+  const hallName = Array.isArray(options.hallName) ? options.hallName[0] : options.hallName
+
+  selectedExplainHallId.value = hallId || ''
+  selectedExplainHallName.value = hallName || '业务单元'
+  syncPageTitle(selectedExplainHallName.value)
+
+  if (!selectedExplainHallId.value) {
+    explainError.value = '缺少展厅参数，请返回讲解列表后重试'
+    return
+  }
+
+  explainLoading.value = true
+  try {
+    explainBusinessUnits.value = await explainUseCase.loadTemporaryBusinessUnitsByHall(selectedExplainHallId.value)
+  } catch (error) {
+    explainError.value = '展厅讲解点加载失败，请稍后重试'
+  } finally {
+    explainLoading.value = false
+  }
+})
+```
+
+- [ ] **Step 4: 实现业务单元点击和页面级返回**
+
+```ts
+const handleExplainBusinessUnitClick = (unitId: string) => {
+  const unit = explainBusinessUnits.value.find((item) => item.id === unitId)
+  const params = new URLSearchParams({
+    hallId: selectedExplainHallId.value,
+    hallName: selectedExplainHallName.value,
+    unitId,
+    unitName: unit?.name || '讲解点'
+  })
+
+  uni.navigateTo({
+    url: `/pages/explain/guide-stop-list?${params.toString()}`
+  })
+}
+
+const goBackToExplainHallList = () => {
+  uni.redirectTo({
+    url: '/pages/explain/list',
+    fail: () => {
+      uni.reLaunch({ url: '/pages/explain/list' })
+    }
+  })
+}
+
+const handleBack = () => {
+  uni.navigateBack({
+    delta: 1,
+    fail: goBackToExplainHallList
+  })
+}
+```
+
+- [ ] **Step 5: 运行 lint 验证新页面与 pages.json 兼容**
+
+Run: `pnpm lint`
+Expected: exit 0，`business-unit-list.vue` 没有未使用导入、`pages.json` 对应引用未触发脚本错误
+
+- [ ] **Step 6: 提交**
+
+```bash
+git add src/pages.json src/pages/explain/business-unit-list.vue
+git commit -m "feat: add explain business unit page"
+```
+
+### Task 3: 新增讲解点列表页并接管业务单元级标题与返回
+
+**Files:**
+- Create: `src/pages/explain/guide-stop-list.vue`
+- Modify: `src/pages.json`
+- Test: `src/pages/explain/guide-stop-list.vue`
+
+**Interfaces:**
+- Consumes:
+  - `explainUseCase.selectBusinessUnit(hallId: string, unitId: string): Promise<ExplainBusinessUnit | null>`
+  - `normalizeExplainDetailTargetFromGuideStop({ id: string }): ExplainDetailTarget`
+  - `ExplainHallSelect.vue` 的 `stage="stop"` 展示模式
+- Produces:
+  - 新页面路由：`/pages/explain/guide-stop-list?hallId=<id>&hallName=<name>&unitId=<id>&unitName=<name>`
+  - 点击讲解点后进入 `pages/exhibit/detail`
+  - 页面级返回：`goBackToBusinessUnitList(): void`
+
+- [ ] **Step 1: 在 `pages.json` 注册讲解点列表页**
+
+新增页面配置：
+
+```json
+{
+  "path": "pages/explain/guide-stop-list",
+  "style": {
+    "navigationBarTitleText": "讲解点",
+    "navigationBarBackgroundColor": "#FFFFFF",
+    "navigationStyle": "custom"
+  }
+}
+```
+
+- [ ] **Step 2: 创建讲解点页骨架**
+
+```vue
+<template>
+  <GuidePageFrame
+    active-tab="explain"
+    variant="static"
+    :show-top-tabs="false"
+    show-back
+    @tab-change="handleTopTabChange"
+    @back="handleBack"
+  >
+    <view class="explain-guide-stop-page">
+      <ExplainHallSelect
+        :guide-stops="explainGuideStopItems"
+        stage="stop"
+        :selected-business-unit-name="selectedExplainBusinessUnitName"
+        :loading="explainLoading"
+        :error="explainError"
+        @guide-stop-click="handleExplainGuideStopClick"
+        @back="handleBack"
+      />
+    </view>
+  </GuidePageFrame>
+</template>
+```
+
+- [ ] **Step 3: 实现参数解析、标题同步与业务单元恢复**
+
+```ts
+const selectedExplainHallId = ref('')
+const selectedExplainHallName = ref('')
+const selectedExplainBusinessUnitId = ref('')
+const selectedExplainBusinessUnitName = ref('')
+const explainGuideStopItems = ref<ExplainGuideStopSelectItem[]>([])
+const explainLoading = ref(false)
+const explainError = ref('')
+
+const toGuideStopItems = (unit: ExplainBusinessUnit): ExplainGuideStopSelectItem[] => (
+  unit.stops.map((stop) => ({
+    id: stop.id,
+    name: stop.name,
+    hallId: stop.hallId,
+    hallName: stop.hallName,
+    floorId: stop.floorId,
+    poiId: stop.poiId,
+    mapX: stop.mapX,
+    mapY: stop.mapY,
+    coverImageUrl: stop.coverImageUrl,
+    description: stop.description,
+    hasAudio: stop.hasAudio,
+    audioStatus: stop.audioStatus,
+    guideLevel: stop.guideLevel,
+    playTargetType: stop.playTargetType,
+    playTargetId: stop.playTargetId
+  }))
+)
+```
+
+`onLoad` 中：
+
+```ts
+onLoad(async (options: any = {}) => {
+  selectedExplainHallId.value = Array.isArray(options.hallId) ? options.hallId[0] : options.hallId || ''
+  selectedExplainHallName.value = Array.isArray(options.hallName) ? options.hallName[0] : options.hallName || ''
+  selectedExplainBusinessUnitId.value = Array.isArray(options.unitId) ? options.unitId[0] : options.unitId || ''
+  selectedExplainBusinessUnitName.value = Array.isArray(options.unitName) ? options.unitName[0] : options.unitName || '讲解点'
+
+  syncPageTitle(selectedExplainBusinessUnitName.value)
+
+  if (!selectedExplainHallId.value || !selectedExplainBusinessUnitId.value) {
+    explainError.value = '缺少业务单元参数，请返回上一级后重试'
+    return
+  }
+
+  explainLoading.value = true
+  try {
+    const unit = await explainUseCase.selectBusinessUnit(
+      selectedExplainHallId.value,
+      selectedExplainBusinessUnitId.value
+    )
+    if (!unit) {
+      explainError.value = '未找到对应业务单元，请返回上一级后重试'
+      return
+    }
+    selectedExplainBusinessUnitName.value = unit.name || selectedExplainBusinessUnitName.value
+    syncPageTitle(selectedExplainBusinessUnitName.value)
+    explainGuideStopItems.value = toGuideStopItems(unit)
+  } catch (error) {
+    explainError.value = '讲解点加载失败，请稍后重试'
+  } finally {
+    explainLoading.value = false
+  }
+})
+```
+
+- [ ] **Step 4: 实现讲解点跳详情和业务单元页回退**
+
+```ts
+const handleExplainGuideStopClick = (stop: ExplainGuideStopSelectItem) => {
+  const target = stop.playTargetType && stop.playTargetId
+    ? { targetType: stop.playTargetType, targetId: stop.playTargetId }
+    : normalizeExplainDetailTargetFromGuideStop({ id: stop.id })
+
+  const params = new URLSearchParams({
+    id: stop.id,
+    tab: 'explain',
+    targetType: target.targetType,
+    targetId: target.targetId
+  })
+
+  uni.navigateTo({
+    url: `/pages/exhibit/detail?${params.toString()}`
+  })
+}
+
+const goBackToBusinessUnitList = () => {
+  const params = new URLSearchParams({
+    hallId: selectedExplainHallId.value,
+    hallName: selectedExplainHallName.value
+  })
+
+  uni.redirectTo({
+    url: `/pages/explain/business-unit-list?${params.toString()}`,
+    fail: () => {
+      uni.reLaunch({ url: `/pages/explain/business-unit-list?${params.toString()}` })
+    }
+  })
+}
+
+const handleBack = () => {
+  uni.navigateBack({
+    delta: 1,
+    fail: goBackToBusinessUnitList
+  })
+}
+```
+
+- [ ] **Step 5: 运行类型检查确认 explain 详情入参链路未被破坏**
+
+Run: `pnpm type-check`
+Expected: exit 0，`guide-stop-list.vue` 到 `pages/exhibit/detail` 的 `targetType/targetId` 参数类型与详情页现有解析逻辑兼容
+
+- [ ] **Step 6: 提交**
+
+```bash
+git add src/pages.json src/pages/explain/guide-stop-list.vue
+git commit -m "feat: add explain guide stop page"
+```
+
+### Task 4: 收敛 ExplainHallSelect 组件为“页面驱动、单模式复用”
+
+**Files:**
+- Modify: `src/components/explain/ExplainHallSelect.vue`
+- Test: `src/components/explain/ExplainHallSelect.vue`
+
+**Interfaces:**
+- Consumes:
+  - 父页面传入的 `stage: 'hall' | 'unit' | 'stop'`
+  - 父页面传入的 `selectedHallName?: string`
+  - 父页面传入的 `selectedBusinessUnitName?: string`
+- Produces:
+  - 保持 `hallClick(hallId: string)`
+  - 保持 `businessUnitClick(unitId: string)`
+  - 保持 `guideStopClick(stop: ExplainGuideStopSelectItem)`
+  - 保持 `back()`
+
+- [ ] **Step 1: 阅读组件中仅服务单页状态机的逻辑**
+
+检查以下内容是否仍有必要：
+
+```ts
+const shouldUseHostNavigation = computed(() => isEmbeddedInWechatMiniProgram())
+const headerTitle = computed(() => {
+  if (props.stage === 'unit') return props.selectedHallName || '选择业务单元'
+  if (props.stage === 'stop') return props.selectedBusinessUnitName || '选择讲解点'
+  return '讲解'
+})
+```
+
+判断原则：页面已拆开后，组件内部标题不再是宿主标题来源，只是普通 H5 自绘页头文案。
+
+- [ ] **Step 2: 删除不再需要的宿主导航分支和单页补丁依赖**
+
+如果页面层已经承接宿主标题与返回，则组件只保留纯展示逻辑。最小目标是让组件不再承担“宿主导航是否可用”的页面级责任。目标代码形态：
+
+```ts
+const headerTitle = computed(() => {
+  if (props.stage === 'unit') return props.selectedHallName || '业务单元'
+  if (props.stage === 'stop') return props.selectedBusinessUnitName || '讲解点'
+  return '讲解'
+})
+```
+
+如确认嵌入小程序场景仍需隐藏自绘页头，可保留 `shouldUseHostNavigation`，但不要再让组件承担页面级 history/title 逻辑。
+
+- [ ] **Step 3: 确认三种模式在拆页后都能独立渲染**
+
+核对模板三块：
+
+```vue
+v-if="stage === 'hall'"
+v-else-if="stage === 'unit'"
+v-else-if="stage === 'stop'"
+```
+
+确保：
+- hall 模式不依赖 `businessUnits`
+- unit 模式不依赖 `guideStops`
+- stop 模式不依赖首页 explain 旧状态
+
+- [ ] **Step 4: 运行 lint 保证组件收敛后无未使用代码**
+
+Run: `pnpm lint`
+Expected: exit 0，`ExplainHallSelect.vue` 无未使用 import / computed / props 分支
+
+- [ ] **Step 5: 提交**
+
+```bash
+git add src/components/explain/ExplainHallSelect.vue
+git commit -m "refactor: narrow explain hall select responsibilities"
+```
+
+### Task 5: 清理旧的单页讲解状态逻辑并完成全链路回归
+
+**Files:**
+- Modify: `src/pages/explain/list.vue`
+- Modify: `src/pages/index/index.vue`
+- Modify: `src/pages/exhibit/detail.vue`（仅当详情返回链路需要最小调整）
+- Test: `src/pages/explain/list.vue`
+- Test: `src/pages/explain/business-unit-list.vue`
+- Test: `src/pages/explain/guide-stop-list.vue`
+- Test: `src/pages/exhibit/detail.vue`
+
+**Interfaces:**
+- Consumes:
+  - 新页面路由 `/pages/explain/business-unit-list`
+  - 新页面路由 `/pages/explain/guide-stop-list`
+  - 现有详情页 `handleBack()` / `buildDetailRoute()` 逻辑
+- Produces:
+  - 不再存在依赖 `explainStage` 的宿主标题 / history patch
+  - 完整回归链路：展厅列表 → 业务单元 → 讲解点 → 详情 → 返回
+
+- [ ] **Step 1: 删除 `pages/explain/list.vue` 中旧的单页 history 补丁**
+
+删除以下类型逻辑：
+
+```ts
+type ExplainHistoryState = { ... }
+window.history.pushState(...)
+window.history.replaceState(...)
+window.addEventListener('popstate', ...)
+```
+
+因为页面拆分后它们不再是正确抽象。
+
+- [ ] **Step 2: 删除首页中旧的 explain 多阶段状态字段**
+
+从 `src/pages/index/index.vue` 删除或收敛以下字段：
+
+```ts
+const explainBusinessUnits = ref<ExplainBusinessUnit[]>([])
+const explainStage = ref<ExplainSelectStage>('hall')
+const selectedExplainHallId = ref('')
+const selectedExplainBusinessUnitId = ref('')
+const selectedExplainBusinessUnitName = ref('')
+```
+
+并同步删除只为这些字段服务的 computed / handlers。
+
+- [ ] **Step 3: 最小检查详情返回是否还需要补充来源兜底**
+
+检查 `src/pages/exhibit/detail.vue` 当前逻辑：
+
+```ts
+const handleBack = () => {
+  if (typeof window !== 'undefined' && window.history.length > 1) {
+    window.history.back()
+    ...
+    return
+  }
+
+  uni.navigateBack({
+    delta: 1,
+    fail: fallbackToExplainHome
+  })
+}
+```
+
+如果从新讲解点页进入详情后，`navigateBack()` 已能自然回到讲解点列表，则不改代码；如果仍会误回首页，再补最小来源参数（例如 `from=guide-stop-list` 与返回兜底路由），但禁止顺手改动播放器或详情正文逻辑。
+
+- [ ] **Step 4: 运行完整静态验证**
+
+Run: `pnpm type-check`
+Expected: exit 0
+
+Run: `pnpm lint`
+Expected: exit 0
+
+Run: `pnpm build:h5`
+Expected: build complete，允许保留项目既有 Sass / 字体告警，但不得有新的 explain 路由构建错误
+
+- [ ] **Step 5: 执行 H5 手工回归**
+
+按以下顺序人工验证：
+
+```text
+1. 首页进入讲解 Tab，展厅列表正常显示
+2. 点击展厅，进入业务单元列表页，标题为当前展厅名
+3. 点击业务单元，进入讲解点列表页，标题为当前业务单元名
+4. 点击讲解点，进入讲解详情页
+5. 页面返回：详情 -> 讲解点列表 -> 业务单元列表 -> 展厅列表 -> 讲解首页/入口页
+6. 直接打开业务单元列表页缺少 hallId 时显示错误态并可返回
+7. 直接打开讲解点列表页缺少 hallId/unitId 时显示错误态并可返回
+```
+
+记录结果到提交说明或任务备注中，不写入生产代码。
+
+- [ ] **Step 6: 提交**
+
+```bash
+git add src/pages/index/index.vue src/pages/explain/list.vue src/pages/exhibit/detail.vue src/components/explain/ExplainHallSelect.vue src/pages/explain/business-unit-list.vue src/pages/explain/guide-stop-list.vue src/pages.json
+git commit -m "feat: split explain flow into dedicated pages"
+```