update

2026-06-16 09:01:02 -06:00 · 2026-06-16 08:58:06 -06:00 · 2026-06-16 08:18:10 -06:00 · 2026-06-16 07:57:22 -06:00 · 2026-06-16 07:51:38 -06:00 · 2026-06-16 07:33:29 -06:00
29 changed files with 2043 additions and 296 deletions
--- a/6
+++ b/6
@@ -2,6 +2,9 @@
 FROM oven/bun:1 AS builder
 WORKDIR /app

+ARG BUN_REGISTRY=https://registry.npmmirror.com
+ENV BUN_CONFIG_REGISTRY=${BUN_REGISTRY}
+
 COPY package.json bun.lock ./
 RUN bun install --frozen-lockfile

@@ -12,6 +15,9 @@ RUN bun run build
 FROM oven/bun:1-slim AS runner
 WORKDIR /app

+ARG BUN_REGISTRY=https://registry.npmmirror.com
+ENV BUN_CONFIG_REGISTRY=${BUN_REGISTRY}
+
 COPY package.json bun.lock ./
 RUN bun install --frozen-lockfile --production

--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,14 +1,20 @@
 services:
  app:
    build: .
-    ports:
-      - "3001:3001"
+    expose:
+      - 3001
    environment:
      - DEEPSEEK_API_KEY=${DEEPSEEK_API_KEY}
      - TEACHING_BOOKS_DB=/app/data/teaching-books.db
    volumes:
      - db_data:/app/data
    restart: unless-stopped
+    networks:
+      - npm_proxy
+
+networks:
+  npm_proxy:
+    external: true

 volumes:
  db_data:
--- a/docs/superpowers/plans/2026-06-16-frontend-routing.md
+++ b/docs/superpowers/plans/2026-06-16-frontend-routing.md
@@ -0,0 +1,340 @@
+# Frontend Routing 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:** Add URL-backed frontend routes for login, book list, book workspace, and admin.
+
+**Architecture:** Keep route ownership in `src/App.vue` and leave page components event-driven. Use `window.history.pushState`, `window.history.replaceState`, and `popstate` to maintain one small local route state without adding dependencies.
+
+**Tech Stack:** Vue 3 Composition API, Vite, Vitest, Vue Test Utils, browser History API.
+
+---
+
+## File Structure
+
+- Modify `src/App.test.ts` for TDD coverage of URL-backed navigation and logged-out redirects.
+- Modify `src/App.vue` to replace local `currentBookId` / `showAdmin` view state with parsed route state.
+- Do not modify `package.json` or `package-lock.json`; existing user changes there are unrelated.
+
+## Task 1: Add failing route tests
+
+**Files:**
+- Modify: `src/App.test.ts`
+- Test: `src/App.test.ts`
+
+- [ ] **Step 1: Replace the auth mock with mutable test state**
+
+Use a hoisted auth state so each test can switch between logged-in and logged-out behavior:
+
+```ts
+const authState = vi.hoisted(() => {
+  const { computed, ref } = require('vue') as typeof import('vue')
+  return {
+    loggedIn: ref(true),
+    user: ref(null),
+    fetchMe: vi.fn(),
+  }
+})
+
+vi.mock('./composables/useAuth', () => ({
+  useAuth: () => ({
+    isLoggedIn: computed(() => authState.loggedIn.value),
+    fetchMe: authState.fetchMe,
+    user: authState.user,
+  }),
+}))
+```
+
+- [ ] **Step 2: Reset URL and auth state before each test**
+
+Add this to the existing `beforeEach`:
+
+```ts
+authState.loggedIn.value = true
+authState.user.value = null
+authState.fetchMe.mockReset()
+window.history.replaceState(null, '', '/books')
+```
+
+- [ ] **Step 3: Add tests for the route behaviors**
+
+Add these tests:
+
+```ts
+it('opens a book route when a book is selected', async () => {
+  vi.mocked(booksApi.listBooks).mockResolvedValue([
+    { id: 'b1', name: '示例整本', updatedAt: '2026-01-01T00:00:00.000Z', lessonCount: 0 },
+  ])
+  vi.mocked(booksApi.getBook).mockResolvedValue({
+    id: 'b1',
+    name: '示例整本',
+    updatedAt: '2026-01-01T00:00:00.000Z',
+    data: createEmptyBook(),
+  })
+
+  const wrapper = mount(App)
+  await flushPromises()
+
+  await wrapper.get('[data-testid="open-b1"]').trigger('click')
+  await flushPromises()
+
+  expect(window.location.pathname).toBe('/books/b1')
+  expect(wrapper.find('[data-testid="back"]').exists()).toBe(true)
+})
+
+it('returns to the books route from the workspace', async () => {
+  vi.mocked(booksApi.listBooks).mockResolvedValue([
+    { id: 'b1', name: '示例整本', updatedAt: '2026-01-01T00:00:00.000Z', lessonCount: 0 },
+  ])
+  vi.mocked(booksApi.getBook).mockResolvedValue({
+    id: 'b1',
+    name: '示例整本',
+    updatedAt: '2026-01-01T00:00:00.000Z',
+    data: createEmptyBook(),
+  })
+
+  const wrapper = mount(App)
+  await flushPromises()
+
+  await wrapper.get('[data-testid="open-b1"]').trigger('click')
+  await flushPromises()
+  await wrapper.get('[data-testid="back"]').trigger('click')
+  await flushPromises()
+
+  expect(window.location.pathname).toBe('/books')
+  expect(wrapper.text()).toContain('教学设计')
+})
+
+it('opens the admin route from the book list', async () => {
+  authState.user.value = { id: 'u1', username: 'admin', role: 'admin' }
+  vi.mocked(booksApi.listBooks).mockResolvedValue([])
+
+  const wrapper = mount(App)
+  await flushPromises()
+
+  await wrapper.get('button').trigger('click')
+  await flushPromises()
+
+  expect(window.location.pathname).toBe('/admin')
+  expect(wrapper.text()).toContain('用户管理')
+})
+
+it('routes logged-out users to login', async () => {
+  authState.loggedIn.value = false
+  window.history.replaceState(null, '', '/books/b1')
+
+  const wrapper = mount(App)
+  await flushPromises()
+
+  expect(window.location.pathname).toBe('/login')
+  expect(wrapper.text()).toContain('登录')
+})
+```
+
+- [ ] **Step 4: Run test to verify RED**
+
+Run:
+
+```bash
+rtk npm test -- src/App.test.ts
+```
+
+Expected: FAIL because `App.vue` does not update `window.location.pathname` for book/admin navigation and does not redirect logged-out users.
+
+## Task 2: Implement route state in App.vue
+
+**Files:**
+- Modify: `src/App.vue`
+- Test: `src/App.test.ts`
+
+- [ ] **Step 1: Replace local page flags with route state**
+
+In `src/App.vue`, replace `currentBookId` and `showAdmin` with this route model:
+
+```ts
+type AppRoute =
+  | { name: 'login' }
+  | { name: 'books' }
+  | { name: 'book'; bookId: string }
+  | { name: 'admin' }
+
+const route = ref<AppRoute>(parseRoute(window.location.pathname))
+```
+
+- [ ] **Step 2: Add route parsing and navigation helpers**
+
+Add helpers in `src/App.vue`:
+
+```ts
+function parseRoute(pathname: string): AppRoute {
+  if (pathname === '/login') return { name: 'login' }
+  if (pathname === '/admin') return { name: 'admin' }
+  if (pathname === '/books') return { name: 'books' }
+
+  const bookMatch = pathname.match(/^\/books\/([^/]+)$/)
+  if (bookMatch?.[1]) {
+    return { name: 'book', bookId: decodeURIComponent(bookMatch[1]) }
+  }
+
+  return { name: 'books' }
+}
+
+function routeToPath(nextRoute: AppRoute): string {
+  if (nextRoute.name === 'login') return '/login'
+  if (nextRoute.name === 'admin') return '/admin'
+  if (nextRoute.name === 'book') return `/books/${encodeURIComponent(nextRoute.bookId)}`
+  return '/books'
+}
+
+function replaceRoute(nextRoute: AppRoute): void {
+  const path = routeToPath(nextRoute)
+  route.value = nextRoute
+  if (window.location.pathname !== path) {
+    window.history.replaceState(null, '', path)
+  }
+}
+
+function pushRoute(nextRoute: AppRoute): void {
+  const path = routeToPath(nextRoute)
+  route.value = nextRoute
+  if (window.location.pathname !== path) {
+    window.history.pushState(null, '', path)
+  }
+}
+```
+
+- [ ] **Step 3: Wire mount, popstate, and auth redirects**
+
+Update imports and lifecycle:
+
+```ts
+import { onBeforeUnmount, onMounted, ref, watch } from 'vue'
+```
+
+Use:
+
+```ts
+function syncRouteForAuth(): void {
+  if (!isLoggedIn.value) {
+    replaceRoute({ name: 'login' })
+    return
+  }
+  if (route.value.name === 'login') {
+    replaceRoute({ name: 'books' })
+  }
+}
+
+function handlePopState(): void {
+  route.value = parseRoute(window.location.pathname)
+  syncRouteForAuth()
+}
+
+onMounted(async () => {
+  window.addEventListener('popstate', handlePopState)
+  await fetchMe()
+  syncRouteForAuth()
+})
+
+onBeforeUnmount(() => {
+  window.removeEventListener('popstate', handlePopState)
+})
+
+watch(isLoggedIn, syncRouteForAuth)
+```
+
+- [ ] **Step 4: Map existing component events to route navigation**
+
+Use:
+
+```ts
+async function handleLoginSuccess(): Promise<void> {
+  await fetchMe()
+  pushRoute({ name: 'books' })
+}
+
+function openBook(id: string): void {
+  pushRoute({ name: 'book', bookId: id })
+}
+
+function backToList(): void {
+  pushRoute({ name: 'books' })
+}
+
+function openAdmin(): void {
+  pushRoute({ name: 'admin' })
+}
+```
+
+- [ ] **Step 5: Update template route conditions**
+
+Use:
+
+```vue
+<LoginPage v-if="route.name === 'login'" @success="handleLoginSuccess" />
+<template v-else>
+  <AdminPage v-if="route.name === 'admin'" @back="backToList" />
+  <WorkspaceView
+    v-else-if="route.name === 'book'"
+    :key="route.bookId"
+    :book-id="route.bookId"
+    @back="backToList"
+  />
+  <BookListPage v-else @open="openBook" @admin="openAdmin" />
+</template>
+```
+
+- [ ] **Step 6: Run test to verify GREEN**
+
+Run:
+
+```bash
+rtk npm test -- src/App.test.ts
+```
+
+Expected: PASS for all `App.test.ts` cases.
+
+## Task 3: Final verification
+
+**Files:**
+- Verify: `src/App.vue`
+- Verify: `src/App.test.ts`
+
+- [ ] **Step 1: Run focused tests**
+
+Run:
+
+```bash
+rtk npm test -- src/App.test.ts
+```
+
+Expected: PASS.
+
+- [ ] **Step 2: Run full frontend test suite**
+
+Run:
+
+```bash
+rtk npm test
+```
+
+Expected: PASS.
+
+- [ ] **Step 3: Run production build**
+
+Run:
+
+```bash
+rtk npm run build
+```
+
+Expected: PASS.
+
+- [ ] **Step 4: Review git diff**
+
+Run:
+
+```bash
+rtk git diff -- src/App.vue src/App.test.ts docs/superpowers/plans/2026-06-16-frontend-routing.md
+```
+
+Expected: diff only contains routing implementation, routing tests, and this plan.
--- a/docs/superpowers/plans/2026-06-16-remove-cover-page.md
+++ b/docs/superpowers/plans/2026-06-16-remove-cover-page.md
@@ -0,0 +1,779 @@
+# Remove Cover Page 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:** Remove the cover page from the teaching-book data model, stored JSON, and workspace UI.
+
+**Architecture:** First make the domain model lesson-only, then add server-side normalization so old book JSON loses `cover` and invalid `selectedId` values. Finally update the Vue store and components so users can only select and edit lesson pages.
+
+**Tech Stack:** Vue 3, Vitest, Vue Test Utils, Bun, bun:sqlite, Hono, TypeScript.
+
+---
+
+## File Structure
+
+- Modify `src/domain/teachingDesign.ts`: remove `BookCover`, remove `cover`, and change `selectedId` to `DesignId | null`.
+- Modify `src/domain/teachingDesign.test.ts`: update defaults and type assertions.
+- Modify `server/db.ts`: normalize stored book JSON on `openDb()` and before saving.
+- Modify `server/db.test.ts`: cover migration of legacy `cover`, legacy `'cover'` selection, invalid selected ids, and route-safe persistence.
+- Modify `server/routes/books.test.ts`: update save/get expectations so `cover` is not persisted.
+- Modify `src/composables/useTeachingBook.ts`: remove `updateCover`, use `null` selection, and update import/delete/clear behavior.
+- Modify `src/composables/useTeachingBook.test.ts`: update tests away from cover and add null-selection coverage.
+- Modify `src/components/LessonSidebar.vue`: remove cover props/events/UI.
+- Modify `src/components/LessonSidebar.test.ts`: assert no cover button and keep drag/drop coverage.
+- Modify `src/components/A4Workspace.vue`: remove cover props/events/import and render only selected lessons.
+- Create `src/components/A4Workspace.test.ts`: assert no cover page is rendered.
+- Modify `src/components/WorkspaceView.vue`: stop passing cover/update-cover.
+- Modify `src/components/WorkspaceView.test.ts`: assert the loaded workspace does not show a cover entry.
+- Delete `src/components/CoverPage.vue`.
+- Modify `src/style.css`: remove cover-specific CSS.
+
+### Task 1: Domain Model
+
+**Files:**
+- Modify: `src/domain/teachingDesign.test.ts`
+- Modify: `src/domain/teachingDesign.ts`
+
+- [ ] **Step 1: Write failing domain tests**
+
+In `src/domain/teachingDesign.test.ts`, replace the `createEmptyBook` describe block with:
+
+```ts
+describe('createEmptyBook', () => {
+  it('creates the schema defaults with no selected page and an ISO timestamp', () => {
+    const book = createEmptyBook()
+
+    expect(book.schemaVersion).toBe(BOOK_SCHEMA_VERSION)
+    expect(book.selectedId).toBeNull()
+    expect(book).not.toHaveProperty('cover')
+    expect(new Date(book.updatedAt).toISOString()).toBe(book.updatedAt)
+  })
+
+  it('creates independent design collections', () => {
+    const first = createEmptyBook()
+    const second = createEmptyBook()
+
+    first.designs.push(createEmptyTeachingDesign('1.md'))
+
+    expect(first.designs).not.toBe(second.designs)
+    expect(second.designs).toEqual([])
+  })
+})
+```
+
+In the `domain types` test, replace the selected id assertion with:
+
+```ts
+    expectTypeOf<TeachingBook['selectedId']>().toEqualTypeOf<DesignId | null>()
+```
+
+- [ ] **Step 2: Run domain tests to verify failure**
+
+Run:
+
+```bash
+rtk npm run test -- src/domain/teachingDesign.test.ts
+```
+
+Expected: FAIL because `createEmptyBook()` still returns `cover` and `selectedId: 'cover'`.
+
+- [ ] **Step 3: Update domain model**
+
+In `src/domain/teachingDesign.ts`, delete:
+
+```ts
+export interface BookCover {
+  courseName: string
+  teacherName: string
+}
+```
+
+Replace `TeachingBook` with:
+
+```ts
+export interface TeachingBook {
+  schemaVersion: typeof BOOK_SCHEMA_VERSION
+  designs: TeachingDesign[]
+  selectedId: DesignId | null
+  updatedAt: string
+}
+```
+
+Replace `createEmptyBook()` with:
+
+```ts
+export function createEmptyBook(): TeachingBook {
+  return {
+    schemaVersion: BOOK_SCHEMA_VERSION,
+    designs: [],
+    selectedId: null,
+    updatedAt: new Date().toISOString(),
+  }
+}
+```
+
+- [ ] **Step 4: Run domain tests to verify pass**
+
+Run:
+
+```bash
+rtk npm run test -- src/domain/teachingDesign.test.ts
+```
+
+Expected: PASS.
+
+### Task 2: Server Data Normalization
+
+**Files:**
+- Modify: `server/db.test.ts`
+- Modify: `server/routes/books.test.ts`
+- Modify: `server/db.ts`
+
+- [ ] **Step 1: Write failing DB migration tests**
+
+In `server/db.test.ts`, add these imports:
+
+```ts
+import { existsSync, rmSync } from 'node:fs'
+import { join } from 'node:path'
+import { tmpdir } from 'node:os'
+```
+
+Add this helper above `describe('db', () => {`:
+
+```ts
+function tempDbPath(name: string): string {
+  const path = join(tmpdir(), `fake-teaching-design-${name}-${crypto.randomUUID()}.db`)
+  if (existsSync(path)) rmSync(path)
+  return path
+}
+```
+
+Append these tests inside `describe('db', () => { ... })`:
+
+```ts
+  it('migrates legacy cover data and cover selection on open', () => {
+    const path = tempDbPath('cover-migration')
+    const db = openDb(path)
+    const design = createEmptyTeachingDesign('1.md')
+    const legacy = {
+      schemaVersion: 1,
+      cover: { courseName: '旧课程', teacherName: '旧教师' },
+      designs: [design],
+      selectedId: 'cover',
+      updatedAt: '2026-01-01T00:00:00.000Z',
+    }
+    db.run('INSERT INTO books (id, name, data, created_at, updated_at) VALUES (?, ?, ?, ?, ?)', [
+      'legacy-1',
+      '旧整本',
+      JSON.stringify(legacy),
+      '2026-01-01T00:00:00.000Z',
+      '2026-01-01T00:00:00.000Z',
+    ])
+    db.close()
+
+    const reopened = openDb(path)
+    const migrated = getBook(reopened, 'legacy-1')!.data
+    const raw = reopened.query<{ data: string }, [string]>('SELECT data FROM books WHERE id = ?').get('legacy-1')!.data
+    reopened.close()
+    rmSync(path)
+
+    expect(migrated).not.toHaveProperty('cover')
+    expect(migrated.selectedId).toBe(design.id)
+    expect(JSON.parse(raw)).not.toHaveProperty('cover')
+  })
+
+  it('migrates legacy cover selection to null when no lessons exist', () => {
+    const path = tempDbPath('empty-cover-migration')
+    const db = openDb(path)
+    db.run('INSERT INTO books (id, name, data, created_at, updated_at) VALUES (?, ?, ?, ?, ?)', [
+      'legacy-empty',
+      '空整本',
+      JSON.stringify({
+        schemaVersion: 1,
+        cover: { courseName: '旧课程', teacherName: '旧教师' },
+        designs: [],
+        selectedId: 'cover',
+        updatedAt: '2026-01-01T00:00:00.000Z',
+      }),
+      '2026-01-01T00:00:00.000Z',
+      '2026-01-01T00:00:00.000Z',
+    ])
+    db.close()
+
+    const reopened = openDb(path)
+    const migrated = getBook(reopened, 'legacy-empty')!.data
+    reopened.close()
+    rmSync(path)
+
+    expect(migrated).not.toHaveProperty('cover')
+    expect(migrated.selectedId).toBeNull()
+  })
+
+  it('normalizes invalid selected ids to the first lesson', () => {
+    const db = openDb(':memory:')
+    const created = createBook(db, '示例整本')
+    const data = createEmptyBook()
+    const design = createEmptyTeachingDesign('1.md')
+    data.designs.push(design)
+    db.run('UPDATE books SET data = ? WHERE id = ?', [
+      JSON.stringify({ ...data, selectedId: 'missing-id' }),
+      created.id,
+    ])
+
+    expect(getBook(db, created.id)?.data.selectedId).toBe(design.id)
+  })
+```
+
+Update the existing `saves book data and updates updated_at` test to stop writing `data.cover` and assert `cover` is absent:
+
+```ts
+  it('saves book data and updates updated_at', () => {
+    const db = openDb(':memory:')
+    const created = createBook(db, '示例整本')
+    const data = createEmptyBook()
+    data.designs.push(createEmptyTeachingDesign('1.md'))
+
+    setSystemTime(new Date('2026-02-01T00:00:00.000Z'))
+    const result = saveBookData(db, created.id, data)
+
+    expect(result).toEqual({ id: created.id, name: '示例整本', updatedAt: '2026-02-01T00:00:00.000Z' })
+    expect(getBook(db, created.id)?.data).not.toHaveProperty('cover')
+  })
+```
+
+- [ ] **Step 2: Update route test expectations**
+
+In `server/routes/books.test.ts`, replace the `saves book data` test body with:
+
+```ts
+  it('saves book data without cover state', async () => {
+    const created = await createViaApi('示例整本')
+
+    const data = createEmptyBook()
+    data.designs.push(createEmptyTeachingDesign('1.md'))
+
+    const res = await app.request(`/api/books/${created.id}`, {
+      method: 'PUT',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ data: { ...data, cover: { courseName: '旧课程', teacherName: '旧教师' } } }),
+    })
+    expect(res.status).toBe(200)
+
+    const fetched = await app.request(`/api/books/${created.id}`)
+    const body = (await fetched.json()) as { data: Record<string, unknown> }
+    expect(body.data).not.toHaveProperty('cover')
+  })
+```
+
+Also update the import in `server/routes/books.test.ts`:
+
+```ts
+import { createEmptyBook, createEmptyTeachingDesign } from '../../src/domain/teachingDesign'
+```
+
+- [ ] **Step 3: Run DB and books route tests to verify failure**
+
+Run:
+
+```bash
+rtk bun test server/db.test.ts server/routes/books.test.ts
+```
+
+Expected: FAIL because stored JSON still preserves `cover` and `'cover'` selected ids.
+
+- [ ] **Step 4: Implement book normalization**
+
+In `server/db.ts`, add these internal types after `interface BookRow`:
+
+```ts
+type StoredTeachingBook = Omit<TeachingBook, 'selectedId'> & {
+  cover?: unknown
+  selectedId?: string | null
+}
+
+interface NormalizedBookData {
+  data: TeachingBook
+  changed: boolean
+}
+```
+
+Add this helper before `openDb()`:
+
+```ts
+function normalizeBookData(raw: StoredTeachingBook): NormalizedBookData {
+  const data = { ...raw, designs: Array.isArray(raw.designs) ? raw.designs : [] } as StoredTeachingBook
+  let changed = false
+
+  if ('cover' in data) {
+    delete data.cover
+    changed = true
+  }
+
+  const selectedId = data.selectedId ?? null
+  const firstDesignId = data.designs[0]?.id ?? null
+  const selectedExists =
+    selectedId !== null && data.designs.some((design) => design.id === selectedId)
+
+  let normalizedSelectedId: TeachingBook['selectedId']
+  if (selectedId === 'cover' || (selectedId !== null && !selectedExists)) {
+    normalizedSelectedId = firstDesignId
+    if (selectedId !== normalizedSelectedId) changed = true
+  } else {
+    normalizedSelectedId = selectedId as TeachingBook['selectedId']
+  }
+
+  return {
+    data: {
+      schemaVersion: data.schemaVersion,
+      designs: data.designs,
+      selectedId: normalizedSelectedId,
+      updatedAt: data.updatedAt,
+    },
+    changed,
+  }
+}
+
+function migrateStoredBooks(db: Database): void {
+  const rows = db.query<{ id: string; data: string }, []>('SELECT id, data FROM books').all()
+  for (const row of rows) {
+    const normalized = normalizeBookData(JSON.parse(row.data) as StoredTeachingBook)
+    if (normalized.changed) {
+      db.run('UPDATE books SET data = ? WHERE id = ?', [JSON.stringify(normalized.data), row.id])
+    }
+  }
+}
+
+function parseBookData(data: string): TeachingBook {
+  return normalizeBookData(JSON.parse(data) as StoredTeachingBook).data
+}
+```
+
+Update `openDb()` to run migration:
+
+```ts
+export function openDb(path: string): Database {
+  const db = new Database(path)
+  db.run('PRAGMA foreign_keys = ON')
+  db.run(SCHEMA)
+  migrateStoredBooks(db)
+  return db
+}
+```
+
+Replace all direct `JSON.parse(row.data) as TeachingBook` uses in `listBooks()` and `getBook()` with `parseBookData(row.data)`.
+
+In `saveBookData()`, normalize before storing:
+
+```ts
+  const normalized = normalizeBookData(data as StoredTeachingBook).data
+  db.run('UPDATE books SET data = ?, updated_at = ? WHERE id = ?', [JSON.stringify(normalized), now, id])
+```
+
+- [ ] **Step 5: Run DB and books route tests to verify pass**
+
+Run:
+
+```bash
+rtk bun test server/db.test.ts server/routes/books.test.ts
+```
+
+Expected: PASS.
+
+### Task 3: Store Selection Without Cover
+
+**Files:**
+- Modify: `src/composables/useTeachingBook.test.ts`
+- Modify: `src/composables/useTeachingBook.ts`
+
+- [ ] **Step 1: Write failing store tests**
+
+In `src/composables/useTeachingBook.test.ts`:
+
+Replace the `loads the book from the API` test with:
+
+```ts
+  it('loads the book from the API without cover state', async () => {
+    const data = createEmptyBook()
+    mockGetBook(data)
+
+    const store = useTeachingBook('b1')
+    await flushPromises()
+
+    expect(booksApi.getBook).toHaveBeenCalledWith('b1')
+    expect(store.loadStatus.value).toBe('loaded')
+    expect(store.book.value).not.toHaveProperty('cover')
+  })
+```
+
+Replace autosave test mutation:
+
+```ts
+    const design = createEmptyTeachingDesign('1.md')
+    store.book.value.designs.push(design)
+    store.updateDesign(design.id, (target) => {
+      target.topic = '新课程名'
+    })
+```
+
+Replace the save-error test mutation with the same `updateDesign()` pattern.
+
+Replace the clear test with:
+
+```ts
+  it('clearBook empties designs and clears selection', async () => {
+    const data = createEmptyBook()
+    data.designs.push(createEmptyTeachingDesign('1.md'))
+    data.selectedId = data.designs[0]!.id
+    mockGetBook(data)
+
+    const store = useTeachingBook('b1')
+    await flushPromises()
+
+    store.clearBook()
+
+    expect(store.book.value.designs).toEqual([])
+    expect(store.book.value.selectedId).toBeNull()
+  })
+```
+
+Add this test inside the describe block:
+
+```ts
+  it('selects null after removing the last selected lesson', async () => {
+    const data = createEmptyBook()
+    const design = createEmptyTeachingDesign('1.md')
+    data.designs.push(design)
+    data.selectedId = design.id
+    mockGetBook(data)
+
+    const store = useTeachingBook('b1')
+    await flushPromises()
+
+    store.removeDesign(design.id)
+
+    expect(store.book.value.designs).toEqual([])
+    expect(store.book.value.selectedId).toBeNull()
+    expect(store.selectedDesign.value).toBeNull()
+  })
+```
+
+- [ ] **Step 2: Run store tests to verify failure**
+
+Run:
+
+```bash
+rtk npm run test -- src/composables/useTeachingBook.test.ts
+```
+
+Expected: FAIL because `updateCover` still exists, `clearBook()` selects `'cover'`, and types still mention cover.
+
+- [ ] **Step 3: Update useTeachingBook types and behavior**
+
+In `src/composables/useTeachingBook.ts`:
+
+Remove `type BookCover` from imports.
+
+Change `TeachingBookStore` methods:
+
+```ts
+  selectPage: (id: DesignId) => void
+  moveDesign: (from: number, to: number) => void
+  removeDesign: (id: DesignId) => void
+  updateDesign: (id: DesignId, updater: (design: TeachingDesign) => void) => void
+```
+
+Delete `updateCover` from the interface and returned object.
+
+Replace `syncDerived()` selected-design logic with:
+
+```ts
+    selectedDesign.value = current.selectedId === null
+      ? null
+      : current.designs.find((design) => design.id === current.selectedId) ?? null
+```
+
+Replace the import selection block with:
+
+```ts
+    if (imported > 0 && book.value.selectedId === null && book.value.designs.length > 0) {
+      book.value.selectedId = book.value.designs[0]!.id
+    }
+```
+
+Change `selectPage()` signature:
+
+```ts
+  function selectPage(id: DesignId): void {
+    book.value.selectedId = id
+  }
+```
+
+In `removeDesign()`, replace fallback selection with:
+
+```ts
+      book.value.selectedId = designs[index]?.id ?? designs[index - 1]?.id ?? null
+```
+
+Delete `updateCover()`.
+
+In `clearBook()`, set:
+
+```ts
+    book.value.selectedId = null
+```
+
+- [ ] **Step 4: Run store tests to verify pass**
+
+Run:
+
+```bash
+rtk npm run test -- src/composables/useTeachingBook.test.ts
+```
+
+Expected: PASS.
+
+### Task 4: Components Without Cover
+
+**Files:**
+- Modify: `src/components/LessonSidebar.test.ts`
+- Create: `src/components/A4Workspace.test.ts`
+- Modify: `src/components/WorkspaceView.test.ts`
+- Modify: `src/components/LessonSidebar.vue`
+- Modify: `src/components/A4Workspace.vue`
+- Modify: `src/components/WorkspaceView.vue`
+- Delete: `src/components/CoverPage.vue`
+- Modify: `src/style.css`
+
+- [ ] **Step 1: Write failing component tests**
+
+In `src/components/LessonSidebar.test.ts`, use `selectedId: designs[0]?.id ?? null` in the existing mount. Add:
+
+```ts
+  it('does not render a cover navigation item', () => {
+    const designs = [createEmptyTeachingDesign('1.md')]
+    const wrapper = mount(LessonSidebar, {
+      props: { designs, selectedId: designs[0]?.id ?? null },
+    })
+
+    expect(wrapper.text()).not.toContain('封面')
+  })
+```
+
+Create `src/components/A4Workspace.test.ts`:
+
+```ts
+import { mount } from '@vue/test-utils'
+import { describe, expect, it } from 'vitest'
+import { createEmptyTeachingDesign } from '../domain/teachingDesign'
+import A4Workspace from './A4Workspace.vue'
+import TeachingDesignPage from './TeachingDesignPage.vue'
+
+describe('A4Workspace', () => {
+  it('renders the selected lesson without a cover page', () => {
+    const design = createEmptyTeachingDesign('1.md')
+    design.topic = '第一课'
+
+    const wrapper = mount(A4Workspace, {
+      props: { selectedDesign: design },
+    })
+
+    expect(wrapper.find('.cover-page').exists()).toBe(false)
+    expect(wrapper.findComponent(TeachingDesignPage).exists()).toBe(true)
+    expect(wrapper.text()).toContain('第一课')
+  })
+
+  it('renders no page when no lesson is selected', () => {
+    const wrapper = mount(A4Workspace, {
+      props: { selectedDesign: null },
+    })
+
+    expect(wrapper.find('.page').exists()).toBe(false)
+  })
+})
+```
+
+In `src/components/WorkspaceView.test.ts`, add this test:
+
+```ts
+  it('does not render a cover entry when lessons exist', async () => {
+    const data = createEmptyBook()
+    data.designs.push(createEmptyTeachingDesign('1.md'))
+    data.selectedId = data.designs[0]!.id
+    mockBook(data)
+
+    const wrapper = mount(WorkspaceView, { props: { bookId: 'b1' } })
+    await flushPromises()
+
+    expect(wrapper.text()).not.toContain('封面')
+  })
+```
+
+- [ ] **Step 2: Run component tests to verify failure**
+
+Run:
+
+```bash
+rtk npm run test -- src/components/LessonSidebar.test.ts src/components/A4Workspace.test.ts src/components/WorkspaceView.test.ts
+```
+
+Expected: FAIL because `LessonSidebar` still renders cover and `A4Workspace` still requires cover props/imports `CoverPage`.
+
+- [ ] **Step 3: Update LessonSidebar**
+
+In `src/components/LessonSidebar.vue`:
+
+Change props:
+
+```ts
+defineProps<{
+  designs: TeachingDesign[]
+  selectedId: DesignId | null
+}>()
+```
+
+Change emits:
+
+```ts
+const emit = defineEmits<{
+  select: [id: DesignId]
+  remove: [id: DesignId]
+  move: [from: number, to: number]
+}>()
+```
+
+Delete the `<button class="lesson-sidebar-item lesson-sidebar-cover">...</button>` block.
+
+- [ ] **Step 4: Update A4Workspace**
+
+Replace `src/components/A4Workspace.vue` with:
+
+```vue
+<script setup lang="ts">
+import type { TeachingDesign } from '../domain/teachingDesign'
+import TeachingDesignPage from './TeachingDesignPage.vue'
+
+defineProps<{
+  selectedDesign: TeachingDesign | null
+}>()
+
+const emit = defineEmits<{
+  'update:design': [design: TeachingDesign]
+}>()
+</script>
+
+<template>
+  <div class="a4-workspace">
+    <div class="a4-paper">
+      <TeachingDesignPage
+        v-if="selectedDesign"
+        :design="selectedDesign"
+        :editable="true"
+        @update:design="emit('update:design', $event)"
+      />
+    </div>
+  </div>
+</template>
+```
+
+- [ ] **Step 5: Update WorkspaceView**
+
+In `src/components/WorkspaceView.vue`:
+
+Remove `updateCover` from the `useTeachingBook()` destructuring.
+
+Replace the `A4Workspace` usage with:
+
+```vue
+          <A4Workspace
+            :selected-design="selectedDesign"
+            @update:design="handleDesignUpdate"
+          />
+```
+
+- [ ] **Step 6: Delete cover component and CSS**
+
+Delete `src/components/CoverPage.vue`.
+
+In `src/style.css`, delete the whole section from:
+
+```css
+/* Cover page */
+```
+
+through the `.cover-field-value` rule.
+
+Also delete `.lesson-sidebar-cover` rules because no element uses that class anymore.
+
+- [ ] **Step 7: Run component tests to verify pass**
+
+Run:
+
+```bash
+rtk npm run test -- src/components/LessonSidebar.test.ts src/components/A4Workspace.test.ts src/components/WorkspaceView.test.ts
+```
+
+Expected: PASS.
+
+### Task 5: Cleanup References and Verify
+
+- [ ] **Step 1: Search for remaining cover references**
+
+Run:
+
+```bash
+rtk rg -n "CoverPage|BookCover|cover|selectedId: 'cover'|'cover'|封面|lesson-sidebar-cover|cover-page" src server
+```
+
+Expected: Output contains only migration compatibility references in `server/db.ts`, `server/db.test.ts`, and `server/routes/books.test.ts`. It must not contain `src/components/CoverPage.vue`, `BookCover`, UI text `封面`, `lesson-sidebar-cover`, or `.cover-page`.
+
+- [ ] **Step 2: Run full frontend tests**
+
+Run:
+
+```bash
+rtk npm run test
+```
+
+Expected: PASS.
+
+- [ ] **Step 3: Run backend tests**
+
+Run:
+
+```bash
+rtk npm run test:server
+```
+
+Expected: PASS.
+
+- [ ] **Step 4: Run production build**
+
+Run:
+
+```bash
+rtk npm run build
+```
+
+Expected: PASS.
+
+- [ ] **Step 5: Review diff**
+
+Run:
+
+```bash
+rtk git diff -- src/domain/teachingDesign.ts src/domain/teachingDesign.test.ts server/db.ts server/db.test.ts server/routes/books.test.ts src/composables/useTeachingBook.ts src/composables/useTeachingBook.test.ts src/components/LessonSidebar.vue src/components/LessonSidebar.test.ts src/components/A4Workspace.vue src/components/A4Workspace.test.ts src/components/WorkspaceView.vue src/components/WorkspaceView.test.ts src/components/CoverPage.vue src/style.css
+```
+
+Expected: Diff removes cover data/UI, adds migration, updates tests, and does not include unrelated `index.html`.
+
+- [ ] **Step 6: Commit implementation**
+
+Run:
+
+```bash
+rtk git add src/domain/teachingDesign.ts src/domain/teachingDesign.test.ts server/db.ts server/db.test.ts server/routes/books.test.ts src/composables/useTeachingBook.ts src/composables/useTeachingBook.test.ts src/components/LessonSidebar.vue src/components/LessonSidebar.test.ts src/components/A4Workspace.vue src/components/A4Workspace.test.ts src/components/WorkspaceView.vue src/components/WorkspaceView.test.ts src/components/CoverPage.vue src/style.css
+rtk git commit -m "feat: remove cover page"
+```
+
+Expected: Commit succeeds.
--- a/docs/superpowers/specs/2026-06-16-frontend-routing-design.md
+++ b/docs/superpowers/specs/2026-06-16-frontend-routing-design.md
@@ -0,0 +1,80 @@
+# Frontend Routing Design
+
+## Goal
+
+Add URL-backed frontend routing so users can refresh or directly open the main app views without losing their place.
+
+## Scope
+
+In scope:
+
+- Add routes for login, book list, book workspace, and admin user management.
+- Keep the existing component structure: `LoginPage`, `BookListPage`, `WorkspaceView`, and `AdminPage`.
+- Preserve the existing auth behavior and API calls.
+- Preserve the existing backend API routes and static SPA fallback.
+- Add focused tests for routing behavior.
+
+Out of scope:
+
+- Adding nested lesson-level URLs.
+- Adding a new navigation layout.
+- Replacing the current auth model.
+- Adding a third-party router package unless the existing code makes a local router impractical.
+
+## Approaches Considered
+
+The recommended approach is a small local router built around `window.history` and `popstate`. The project does not currently use `vue-router`, and the app only needs four top-level route states. A local router keeps the change small and avoids a new dependency.
+
+A second option is adding `vue-router`. It would be more conventional for a growing Vue app, but it adds dependency and setup overhead for a narrow routing surface.
+
+A third option is hash routing, such as `/#/books/b1`. It avoids server fallback concerns, but the server already serves `dist/index.html` for unknown paths, so clean history URLs are a better fit.
+
+## Routes
+
+The frontend will support these clean URLs:
+
+- `/login` shows `LoginPage`.
+- `/books` shows `BookListPage`.
+- `/books/:bookId` shows `WorkspaceView` for the selected book.
+- `/admin` shows `AdminPage`.
+
+Unknown paths redirect to the best available default: `/books` when logged in and `/login` when logged out.
+
+## Auth Behavior
+
+`App.vue` still calls `fetchMe()` on mount. While logged out, any route except `/login` resolves to the login page and updates the URL to `/login`.
+
+After login succeeds, the app routes to `/books`. Logout continues to clear tokens through `useAuth`; when the app observes the logged-out state, it routes to `/login`.
+
+The admin page remains visible only through the existing admin entry point in `BookListPage`. If a non-admin user reaches `/admin` directly, the backend admin API will still return authorization errors. The frontend may render the page shell, but protected data will not load.
+
+## Component Behavior
+
+`BookListPage` keeps emitting `open` and `admin`. `App.vue` will translate those events into route changes:
+
+- `open(id)` navigates to `/books/{id}`.
+- `admin` navigates to `/admin`.
+
+`WorkspaceView` keeps emitting `back`; `App.vue` maps it to `/books`.
+
+`AdminPage` keeps emitting `back`; `App.vue` maps it to `/books`.
+
+This preserves component contracts and confines route ownership to the app shell.
+
+## Error Handling
+
+Book load errors remain handled by `WorkspaceView`. Its existing "返回列表" action navigates back to `/books`.
+
+Route parsing should be strict enough to avoid invalid view state. Empty or malformed book IDs fall back to `/books`.
+
+## Testing
+
+Add or update `App.test.ts` coverage for:
+
+- Starting at `/books` renders the book list.
+- Opening a book updates the URL to `/books/:bookId` and renders the workspace.
+- Pressing workspace back updates the URL to `/books`.
+- Opening admin updates the URL to `/admin`.
+- Logged-out users are routed to `/login`.
+
+Run the focused app tests and the project build after implementation.
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,21 +11,22 @@
        "hono": "^4.12.25",
        "jszip": "^3.10.1",
        "markdown-it": "^14.2.0",
-        "vue": "^3.5.34"
+        "vue": "^3.5.38"
      },
      "devDependencies": {
        "@testing-library/jest-dom": "^6.9.1",
+        "@types/bun": "^1.3.14",
        "@types/markdown-it": "^14.1.2",
-        "@types/node": "^24.12.3",
-        "@vitejs/plugin-vue": "^6.0.6",
-        "@vitest/coverage-v8": "^4.1.8",
+        "@types/node": "^25.9.3",
+        "@vitejs/plugin-vue": "^6.0.7",
+        "@vitest/coverage-v8": "^4.1.9",
        "@vue/test-utils": "^2.4.11",
        "@vue/tsconfig": "^0.9.1",
        "jsdom": "^29.1.1",
-        "typescript": "~6.0.2",
-        "vite": "^8.0.12",
-        "vitest": "^4.1.8",
-        "vue-tsc": "^3.2.8"
+        "typescript": "^6.0.3",
+        "vite": "^8.0.16",
+        "vitest": "^4.1.9",
+        "vue-tsc": "^3.3.5"
      }
    },
    "node_modules/@adobe/css-tools": {
@@ -754,6 +755,16 @@
        "tslib": "^2.4.0"
      }
    },
+    "node_modules/@types/bun": {
+      "version": "1.3.14",
+      "resolved": "https://registry.npmjs.org/@types/bun/-/bun-1.3.14.tgz",
+      "integrity": "sha512-h1hFqFVcvAvD9j9K7ZW7vd82aSA+rTdznZa+5bwvCwqSB1jmmfLcbIWhOLx1/+boy/xmjgCs/OMUL8hRJSmnPw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "bun-types": "1.3.14"
+      }
+    },
    "node_modules/@types/chai": {
      "version": "5.2.3",
      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-5.2.3.tgz",
@@ -805,14 +816,13 @@
      "license": "MIT"
    },
    "node_modules/@types/node": {
-      "version": "24.13.2",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-24.13.2.tgz",
-      "integrity": "sha512-fRa09kZTgu8o71KFcDjUFuc7F+dEbZYZmkI0mg5YBTRs0yMKjYHsq/c0urDKeDb+D5qVgXOdFcuu+DZPKOITwA==",
+      "version": "25.9.3",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-25.9.3.tgz",
+      "integrity": "sha512-603BddQMv3pUcr4U2dhujk83N2tTDVr/34wII2B6bJy6g+8WD6yUb11jszNs0gdi4PesVWl7ABt8nYMVpnLUcg==",
      "dev": true,
      "license": "MIT",
-      "peer": true,
      "dependencies": {
-        "undici-types": "~7.18.0"
+        "undici-types": ">=7.24.0 <7.24.7"
      }
    },
    "node_modules/@vitejs/plugin-vue": {
@@ -833,15 +843,15 @@
      }
    },
    "node_modules/@vitest/coverage-v8": {
-      "version": "4.1.8",
-      "resolved": "https://registry.npmjs.org/@vitest/coverage-v8/-/coverage-v8-4.1.8.tgz",
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+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/@vitest/coverage-v8/-/coverage-v8-4.1.9.tgz",
+      "integrity": "sha512-G9/lgqibheLVBDRuya45EbsEXTYcWoSG+TLg7i2axuzx0Eq62eXn+aWXyaVdV5vKvFSWd6ywcX8hA7la9Pvu8g==",
      "dev": true,
      "license": "MIT",
      "peer": true,
      "dependencies": {
        "@bcoe/v8-coverage": "^1.0.2",
-        "@vitest/utils": "4.1.8",
+        "@vitest/utils": "4.1.9",
        "ast-v8-to-istanbul": "^1.0.0",
        "istanbul-lib-coverage": "^3.2.2",
        "istanbul-lib-report": "^3.0.1",
@@ -855,8 +865,8 @@
        "url": "https://opencollective.com/vitest"
      },
      "peerDependencies": {
-        "@vitest/browser": "4.1.8",
-        "vitest": "4.1.8"
+        "@vitest/browser": "4.1.9",
+        "vitest": "4.1.9"
      },
      "peerDependenciesMeta": {
        "@vitest/browser": {
@@ -865,16 +875,16 @@
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    },
    "node_modules/@vitest/expect": {
-      "version": "4.1.8",
-      "resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-4.1.8.tgz",
-      "integrity": "sha512-h3nDO677RDLEGlBxyQ5CW8RlMThSKSRLUePLOx09gNIWRL40edgA1GCZSZgf1W55MFAG6/Sw14KeaAnqv0NKdQ==",
+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-4.1.9.tgz",
+      "integrity": "sha512-vl/rYsUKcBr3SnQn166+XR5ZQcgMx3DQhFWdfli/cWpLnLUmbxZvyrJZotLFUryib+LtArYMSTJ5RbQ57ZqrlA==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
        "@standard-schema/spec": "^1.1.0",
        "@types/chai": "^5.2.2",
-        "@vitest/spy": "4.1.8",
-        "@vitest/utils": "4.1.8",
+        "@vitest/spy": "4.1.9",
+        "@vitest/utils": "4.1.9",
        "chai": "^6.2.2",
        "tinyrainbow": "^3.1.0"
      },
@@ -883,13 +893,13 @@
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    },
    "node_modules/@vitest/mocker": {
-      "version": "4.1.8",
-      "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-4.1.8.tgz",
-      "integrity": "sha512-LEiN/xe4OSIbKe9HQIp5OC24agGD9J5CnmMgsLohVVoOPWL9a2sBoR6VBx43jQZb7Kr1l4RCuyCJzcAa0+dojw==",
+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-4.1.9.tgz",
+      "integrity": "sha512-EVkXzBjrPGM+cK8/ANWgBrkUCfJfb38/EfTSO8h7pWvKkyPkpWxvR7BkD2MyItMF62C97zAEoqdpUixwR/e+Rw==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@vitest/spy": "4.1.8",
+        "@vitest/spy": "4.1.9",
        "estree-walker": "^3.0.3",
        "magic-string": "^0.30.21"
      },
@@ -920,9 +930,9 @@
      }
    },
    "node_modules/@vitest/pretty-format": {
-      "version": "4.1.8",
-      "resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-4.1.8.tgz",
-      "integrity": "sha512-9GasEBxpZ1VYIpqHf/0+YGg121uSNwCKOJqIrTwWP/TB7DmFCiaBpNl3aPZzoLWfWkuqhbH8vJIVobZkvdo2cA==",
+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-4.1.9.tgz",
+      "integrity": "sha512-s0iufns3iIFitdgm+YR7g1whCAaGtXz459VS9/PqyKDEEFgYIhsHOQmXgIgDuYCt7DeQmiZT0Qe2OA2p4ZPu5A==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
@@ -933,13 +943,13 @@
      }
    },
    "node_modules/@vitest/runner": {
-      "version": "4.1.8",
-      "resolved": "https://registry.npmjs.org/@vitest/runner/-/runner-4.1.8.tgz",
-      "integrity": "sha512-EmVxeBAfMJvycdjd6Hm+RbFBbA9fKvo0Kx37hNpBYoYeavH3RNsBXWDooR1mgD52dCrxIIuP7UotpfiwOikvcg==",
+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/@vitest/runner/-/runner-4.1.9.tgz",
+      "integrity": "sha512-KXLMDtc7oe70+3mJfGrPUWPesswH+3sTxAMAMl8DG7I8IUQT4XW718dY5ID3vPUcmlu27CcKfY4P3h3I29SLJg==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@vitest/utils": "4.1.8",
+        "@vitest/utils": "4.1.9",
        "pathe": "^2.0.3"
      },
      "funding": {
@@ -947,14 +957,14 @@
      }
    },
    "node_modules/@vitest/snapshot": {
-      "version": "4.1.8",
-      "resolved": "https://registry.npmjs.org/@vitest/snapshot/-/snapshot-4.1.8.tgz",
-      "integrity": "sha512-acfZboRmAIf05DEKcBQy33VXojFJjtUdLyo7oOmV9kebb2xdU01UknNiPuPZoJZQyO7DF0gZdTGTpeAzET9QPQ==",
+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/@vitest/snapshot/-/snapshot-4.1.9.tgz",
+      "integrity": "sha512-Jc7RKGNBo8Z28WYIm0Niej4xdSPByRf6mU58VpHQkd6Zh05rlnA+twjbK5HyeIGHxrzsc3mJgS43uM0CZKzaIA==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@vitest/pretty-format": "4.1.8",
-        "@vitest/utils": "4.1.8",
+        "@vitest/pretty-format": "4.1.9",
+        "@vitest/utils": "4.1.9",
        "magic-string": "^0.30.21",
        "pathe": "^2.0.3"
      },
@@ -963,9 +973,9 @@
      }
    },
    "node_modules/@vitest/spy": {
-      "version": "4.1.8",
-      "resolved": "https://registry.npmjs.org/@vitest/spy/-/spy-4.1.8.tgz",
-      "integrity": "sha512-6EevtBp6OZOPF7bmz36HrGMeP3txgVSrgebWxHOafDXGkhIzfXK14f8KF6MuFfgXXUeHxmpD3BQxkV00/3s5mA==",
+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/@vitest/spy/-/spy-4.1.9.tgz",
+      "integrity": "sha512-fHpsS6mIi+PiEW+vcRVOMkX1oSaPKne3VOclSFICPcGOmfKgXPU5iAah+wcNcj2xPrCCmfq99IDGf+EojhhvhA==",
      "dev": true,
      "license": "MIT",
      "funding": {
@@ -973,13 +983,13 @@
      }
    },
    "node_modules/@vitest/utils": {
-      "version": "4.1.8",
-      "resolved": "https://registry.npmjs.org/@vitest/utils/-/utils-4.1.8.tgz",
-      "integrity": "sha512-uOJamYALNhfJ6iolExyQM40yIQwDqYnkKtQ5VCiSe17E33H0aQ/u+1GlRuz4LZBk6Mm3sg90G9hEbmEt37C1Zg==",
+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/@vitest/utils/-/utils-4.1.9.tgz",
+      "integrity": "sha512-A51o8ymO5PpqlWNnBP9ZHPXDIpuMtTLlGSjN7la4US+LJzoUMyhwjA5QXlm39JexgwHKW4Xjs8Z2d3dLCXOeuA==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@vitest/pretty-format": "4.1.8",
+        "@vitest/pretty-format": "4.1.9",
        "convert-source-map": "^2.0.0",
        "tinyrainbow": "^3.1.0"
      },
@@ -1292,6 +1302,16 @@
        "balanced-match": "^1.0.0"
      }
    },
+    "node_modules/bun-types": {
+      "version": "1.3.14",
+      "resolved": "https://registry.npmjs.org/bun-types/-/bun-types-1.3.14.tgz",
+      "integrity": "sha512-4N0ig0fEomHt5R0KCFWjovxow98rIoRwKolrYdCcknNwMekCXRnWEUvgu5soYV8QXtVsrUD8B95MBOZGPvr6KQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
    "node_modules/chai": {
      "version": "6.2.2",
      "resolved": "https://registry.npmjs.org/chai/-/chai-6.2.2.tgz",
@@ -2918,9 +2938,9 @@
      }
    },
    "node_modules/undici-types": {
-      "version": "7.18.2",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.18.2.tgz",
-      "integrity": "sha512-AsuCzffGHJybSaRrmr5eHr81mwJU3kjw6M+uprWvCXiNeN9SOGwQ3Jn8jb8m3Z6izVgknn1R0FTCEAP2QrLY/w==",
+      "version": "7.24.6",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.24.6.tgz",
+      "integrity": "sha512-WRNW+sJgj5OBN4/0JpHFqtqzhpbnV0GuB+OozA9gCL7a993SmU+1JBZCzLNxYsbMfIeDL+lTsphD5jN5N+n0zg==",
      "dev": true,
      "license": "MIT"
    },
@@ -3010,20 +3030,20 @@
      }
    },
    "node_modules/vitest": {
-      "version": "4.1.8",
-      "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.1.8.tgz",
-      "integrity": "sha512-flY6ScbCIt9HThs+C5HS7jvGOB560DJtk/Z15IQROTA6zEy49Nh8T/dofWTQL+n3vswqn87sbJNiuqw1SDp5Ig==",
+      "version": "4.1.9",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.1.9.tgz",
+      "integrity": "sha512-nE3/LEyc0z87uHYLZebqCUOaJr2hdtuPp7BQ4BosVFnfltxgAvMG08NyrSGlPpOUWvR27c5flSmYFTNr78L9GQ==",
      "dev": true,
      "license": "MIT",
      "peer": true,
      "dependencies": {
-        "@vitest/expect": "4.1.8",
-        "@vitest/mocker": "4.1.8",
-        "@vitest/pretty-format": "4.1.8",
-        "@vitest/runner": "4.1.8",
-        "@vitest/snapshot": "4.1.8",
-        "@vitest/spy": "4.1.8",
-        "@vitest/utils": "4.1.8",
+        "@vitest/expect": "4.1.9",
+        "@vitest/mocker": "4.1.9",
+        "@vitest/pretty-format": "4.1.9",
+        "@vitest/runner": "4.1.9",
+        "@vitest/snapshot": "4.1.9",
+        "@vitest/spy": "4.1.9",
+        "@vitest/utils": "4.1.9",
        "es-module-lexer": "^2.0.0",
        "expect-type": "^1.3.0",
        "magic-string": "^0.30.21",
@@ -3051,12 +3071,12 @@
        "@edge-runtime/vm": "*",
        "@opentelemetry/api": "^1.9.0",
        "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0",
-        "@vitest/browser-playwright": "4.1.8",
-        "@vitest/browser-preview": "4.1.8",
-        "@vitest/browser-webdriverio": "4.1.8",
-        "@vitest/coverage-istanbul": "4.1.8",
-        "@vitest/coverage-v8": "4.1.8",
-        "@vitest/ui": "4.1.8",
+        "@vitest/browser-playwright": "4.1.9",
+        "@vitest/browser-preview": "4.1.9",
+        "@vitest/browser-webdriverio": "4.1.9",
+        "@vitest/coverage-istanbul": "4.1.9",
+        "@vitest/coverage-v8": "4.1.9",
+        "@vitest/ui": "4.1.9",
        "happy-dom": "*",
        "jsdom": "*",
        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0"
--- a/package.json
+++ b/package.json
@@ -18,21 +18,21 @@
    "hono": "^4.12.25",
    "jszip": "^3.10.1",
    "markdown-it": "^14.2.0",
-    "vue": "^3.5.34"
+    "vue": "^3.5.38"
  },
  "devDependencies": {
    "@testing-library/jest-dom": "^6.9.1",
    "@types/bun": "^1.3.14",
    "@types/markdown-it": "^14.1.2",
-    "@types/node": "^24.12.3",
-    "@vitejs/plugin-vue": "^6.0.6",
-    "@vitest/coverage-v8": "^4.1.8",
+    "@types/node": "^25.9.3",
+    "@vitejs/plugin-vue": "^6.0.7",
+    "@vitest/coverage-v8": "^4.1.9",
    "@vue/test-utils": "^2.4.11",
    "@vue/tsconfig": "^0.9.1",
    "jsdom": "^29.1.1",
-    "typescript": "~6.0.2",
-    "vite": "^8.0.12",
-    "vitest": "^4.1.8",
-    "vue-tsc": "^3.2.8"
+    "typescript": "^6.0.3",
+    "vite": "^8.0.16",
+    "vitest": "^4.1.9",
+    "vue-tsc": "^3.3.5"
  }
 }
--- a/server/db.test.ts
+++ b/server/db.test.ts
@@ -1,3 +1,6 @@
+import { existsSync, rmSync } from 'node:fs'
+import { tmpdir } from 'node:os'
+import { join } from 'node:path'
 import { afterEach, describe, expect, it, setSystemTime } from 'bun:test'
 import { createEmptyBook, createEmptyTeachingDesign } from '../src/domain/teachingDesign'
 import {
@@ -10,6 +13,12 @@ afterEach(() => {
  setSystemTime()
 })

+function tempDbPath(name: string): string {
+  const path = join(tmpdir(), `fake-teaching-design-${name}-${crypto.randomUUID()}.db`)
+  if (existsSync(path)) rmSync(path)
+  return path
+}
+
 describe('db', () => {
  it('creates a book with empty data', () => {
    const db = openDb(':memory:')
@@ -55,13 +64,85 @@ describe('db', () => {
    const db = openDb(':memory:')
    const created = createBook(db, '示例整本')
    const data = createEmptyBook()
-    data.cover.courseName = 'Web 前端开发'
+    data.designs.push(createEmptyTeachingDesign('1.md'))

    setSystemTime(new Date('2026-02-01T00:00:00.000Z'))
    const result = saveBookData(db, created.id, data)

    expect(result).toEqual({ id: created.id, name: '示例整本', updatedAt: '2026-02-01T00:00:00.000Z' })
-    expect(getBook(db, created.id)?.data.cover.courseName).toBe('Web 前端开发')
+    expect(getBook(db, created.id)?.data).not.toHaveProperty('cover')
+  })
+
+  it('migrates legacy cover data and cover selection on open', () => {
+    const path = tempDbPath('cover-migration')
+    const db = openDb(path)
+    const design = createEmptyTeachingDesign('1.md')
+    const legacy = {
+      schemaVersion: 1,
+      cover: { courseName: '旧课程', teacherName: '旧教师' },
+      designs: [design],
+      selectedId: 'cover',
+      updatedAt: '2026-01-01T00:00:00.000Z',
+    }
+    db.run('INSERT INTO books (id, name, data, created_at, updated_at) VALUES (?, ?, ?, ?, ?)', [
+      'legacy-1',
+      '旧整本',
+      JSON.stringify(legacy),
+      '2026-01-01T00:00:00.000Z',
+      '2026-01-01T00:00:00.000Z',
+    ])
+    db.close()
+
+    const reopened = openDb(path)
+    const migrated = getBook(reopened, 'legacy-1')!.data
+    const raw = reopened.query<{ data: string }, [string]>('SELECT data FROM books WHERE id = ?').get('legacy-1')!.data
+    reopened.close()
+    rmSync(path)
+
+    expect(migrated).not.toHaveProperty('cover')
+    expect(migrated.selectedId).toBe(design.id)
+    expect(JSON.parse(raw)).not.toHaveProperty('cover')
+  })
+
+  it('migrates legacy cover selection to null when no lessons exist', () => {
+    const path = tempDbPath('empty-cover-migration')
+    const db = openDb(path)
+    db.run('INSERT INTO books (id, name, data, created_at, updated_at) VALUES (?, ?, ?, ?, ?)', [
+      'legacy-empty',
+      '空整本',
+      JSON.stringify({
+        schemaVersion: 1,
+        cover: { courseName: '旧课程', teacherName: '旧教师' },
+        designs: [],
+        selectedId: 'cover',
+        updatedAt: '2026-01-01T00:00:00.000Z',
+      }),
+      '2026-01-01T00:00:00.000Z',
+      '2026-01-01T00:00:00.000Z',
+    ])
+    db.close()
+
+    const reopened = openDb(path)
+    const migrated = getBook(reopened, 'legacy-empty')!.data
+    reopened.close()
+    rmSync(path)
+
+    expect(migrated).not.toHaveProperty('cover')
+    expect(migrated.selectedId).toBeNull()
+  })
+
+  it('normalizes invalid selected ids to the first lesson', () => {
+    const db = openDb(':memory:')
+    const created = createBook(db, '示例整本')
+    const data = createEmptyBook()
+    const design = createEmptyTeachingDesign('1.md')
+    data.designs.push(design)
+    db.run('UPDATE books SET data = ? WHERE id = ?', [
+      JSON.stringify({ ...data, selectedId: 'missing-id' }),
+      created.id,
+    ])
+
+    expect(getBook(db, created.id)?.data.selectedId).toBe(design.id)
  })

  it('returns null when saving data for a missing book', () => {
--- a/server/db.ts
+++ b/server/db.ts
@@ -28,6 +28,16 @@ interface BookRow {
  updated_at: string
 }

+type StoredTeachingBook = Omit<TeachingBook, 'selectedId'> & {
+  cover?: unknown
+  selectedId?: string | null
+}
+
+interface NormalizedBookData {
+  data: TeachingBook
+  changed: boolean
+}
+
 export interface UserRecord {
  id: string
  username: string
@@ -77,10 +87,59 @@ const SCHEMA = `
  )
 `

+function normalizeBookData(raw: StoredTeachingBook): NormalizedBookData {
+  const data = { ...raw, designs: Array.isArray(raw.designs) ? raw.designs : [] }
+  let changed = false
+
+  if ('cover' in data) {
+    delete data.cover
+    changed = true
+  }
+
+  const selectedId = data.selectedId ?? null
+  const firstDesignId = data.designs[0]?.id ?? null
+  const selectedExists =
+    selectedId !== null && data.designs.some((design) => design.id === selectedId)
+
+  let normalizedSelectedId: TeachingBook['selectedId']
+  if (selectedId === 'cover' || (selectedId !== null && !selectedExists)) {
+    normalizedSelectedId = firstDesignId
+    changed = selectedId !== normalizedSelectedId || changed
+  } else {
+    normalizedSelectedId = selectedId as TeachingBook['selectedId']
+  }
+
+  return {
+    data: {
+      schemaVersion: data.schemaVersion,
+      designs: data.designs,
+      selectedId: normalizedSelectedId,
+      updatedAt: data.updatedAt,
+    },
+    changed,
+  }
+}
+
+function parseBookData(data: string): TeachingBook {
+  return normalizeBookData(JSON.parse(data) as StoredTeachingBook).data
+}
+
+function migrateStoredBooks(db: Database): void {
+  const rows = db.query<{ id: string; data: string }, []>('SELECT id, data FROM books').all()
+
+  for (const row of rows) {
+    const normalized = normalizeBookData(JSON.parse(row.data) as StoredTeachingBook)
+    if (normalized.changed) {
+      db.run('UPDATE books SET data = ? WHERE id = ?', [JSON.stringify(normalized.data), row.id])
+    }
+  }
+}
+
 export function openDb(path: string): Database {
  const db = new Database(path)
  db.run('PRAGMA foreign_keys = ON')
  db.run(SCHEMA)
+  migrateStoredBooks(db)
  return db
 }

@@ -93,7 +152,7 @@ export function listBooks(db: Database): BookSummary[] {
    id: row.id,
    name: row.name,
    updatedAt: row.updated_at,
-    lessonCount: (JSON.parse(row.data) as TeachingBook).designs.length,
+    lessonCount: parseBookData(row.data).designs.length,
  }))
 }

@@ -124,7 +183,7 @@ export function getBook(db: Database, id: string): BookRecord | null {
    id: row.id,
    name: row.name,
    updatedAt: row.updated_at,
-    data: JSON.parse(row.data) as TeachingBook,
+    data: parseBookData(row.data),
  }
 }

@@ -135,7 +194,8 @@ export function saveBookData(db: Database, id: string, data: TeachingBook): Book
  if (!existing) return null

  const now = new Date().toISOString()
-  db.run('UPDATE books SET data = ?, updated_at = ? WHERE id = ?', [JSON.stringify(data), now, id])
+  const normalized = normalizeBookData(data as unknown as StoredTeachingBook).data
+  db.run('UPDATE books SET data = ?, updated_at = ? WHERE id = ?', [JSON.stringify(normalized), now, id])

  return { id, name: existing.name, updatedAt: now }
 }
--- a/server/routes/books.test.ts
+++ b/server/routes/books.test.ts
@@ -1,7 +1,7 @@
 import { beforeEach, describe, expect, it } from 'bun:test'
 import type { Database } from 'bun:sqlite'
 import { Hono } from 'hono'
-import { createEmptyBook } from '../../src/domain/teachingDesign'
+import { createEmptyBook, createEmptyTeachingDesign } from '../../src/domain/teachingDesign'
 import { openDb } from '../db'
 import { createBooksRouter } from './books'

@@ -64,22 +64,22 @@ describe('books routes', () => {
    expect(res.status).toBe(404)
  })

-  it('saves book data', async () => {
+  it('saves book data without cover state', async () => {
    const created = await createViaApi('示例整本')

    const data = createEmptyBook()
-    data.cover.courseName = 'Web 前端开发'
+    data.designs.push(createEmptyTeachingDesign('1.md'))

    const res = await app.request(`/api/books/${created.id}`, {
      method: 'PUT',
      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ data }),
+      body: JSON.stringify({ data: { ...data, cover: { courseName: '旧课程', teacherName: '旧教师' } } }),
    })
    expect(res.status).toBe(200)

    const fetched = await app.request(`/api/books/${created.id}`)
-    const body = (await fetched.json()) as { data: { cover: { courseName: string } } }
-    expect(body.data.cover.courseName).toBe('Web 前端开发')
+    const body = (await fetched.json()) as { data: Record<string, unknown> }
+    expect(body.data).not.toHaveProperty('cover')
  })

  it('returns 404 when saving data for a missing book', async () => {
--- a/src/App.test.ts
+++ b/src/App.test.ts
@@ -1,22 +1,39 @@
 import { flushPromises, mount } from '@vue/test-utils'
-import { computed, ref } from 'vue'
+import { computed } from 'vue'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import App from './App.vue'
 import { createEmptyBook } from './domain/teachingDesign'
 import * as booksApi from './services/booksApi'

 vi.mock('./services/booksApi')
+
+const authState = vi.hoisted(() => ({
+  authedFetch: vi.fn(),
+  fetchMe: vi.fn(),
+  loggedIn: true,
+  login: vi.fn(),
+  logout: vi.fn(),
+  user: null as { id: string; username: string; role: 'admin' | 'user' } | null,
+}))
+
 vi.mock('./composables/useAuth', () => ({
+  authedFetch: authState.authedFetch,
  useAuth: () => ({
-    isLoggedIn: computed(() => true),
-    fetchMe: vi.fn(),
-    user: ref(null),
+    fetchMe: authState.fetchMe,
+    isLoggedIn: computed(() => authState.loggedIn),
+    login: authState.login,
+    logout: authState.logout,
+    user: computed(() => authState.user),
  }),
 }))

 describe('App', () => {
  beforeEach(() => {
    vi.clearAllMocks()
+    authState.authedFetch.mockResolvedValue([])
+    authState.loggedIn = true
+    authState.user = null
+    window.history.replaceState(null, '', '/books')
  })

  it('starts with the book list entry page', async () => {
@@ -29,7 +46,7 @@ describe('App', () => {
    expect(wrapper.text()).toContain('新建整本')
  })

-  it('switches to the workspace view when a book is opened', async () => {
+  it('opens a book route when a book is selected', async () => {
    vi.mocked(booksApi.listBooks).mockResolvedValue([
      { id: 'b1', name: '示例整本', updatedAt: '2026-01-01T00:00:00.000Z', lessonCount: 0 },
    ])
@@ -46,10 +63,11 @@ describe('App', () => {
    await wrapper.get('[data-testid="open-b1"]').trigger('click')
    await flushPromises()

+    expect(window.location.pathname).toBe('/books/b1')
    expect(wrapper.find('[data-testid="back"]').exists()).toBe(true)
  })

-  it('returns to the book list when back is emitted', async () => {
+  it('returns to the books route from the workspace', async () => {
    vi.mocked(booksApi.listBooks).mockResolvedValue([
      { id: 'b1', name: '示例整本', updatedAt: '2026-01-01T00:00:00.000Z', lessonCount: 0 },
    ])
@@ -69,6 +87,35 @@ describe('App', () => {
    await wrapper.get('[data-testid="back"]').trigger('click')
    await flushPromises()

+    expect(window.location.pathname).toBe('/books')
    expect(wrapper.text()).toContain('教学设计')
  })
+
+  it('opens the admin route from the book list', async () => {
+    authState.user = { id: 'u1', username: 'admin', role: 'admin' }
+    vi.mocked(booksApi.listBooks).mockResolvedValue([])
+
+    const wrapper = mount(App)
+    await flushPromises()
+
+    const adminButton = wrapper.findAll('button').find((button) => button.text() === '用户管理')
+    expect(adminButton).toBeDefined()
+
+    await adminButton!.trigger('click')
+    await flushPromises()
+
+    expect(window.location.pathname).toBe('/admin')
+    expect(wrapper.text()).toContain('用户管理')
+  })
+
+  it('routes logged-out users to login', async () => {
+    authState.loggedIn = false
+    window.history.replaceState(null, '', '/books/b1')
+
+    const wrapper = mount(App)
+    await flushPromises()
+
+    expect(window.location.pathname).toBe('/login')
+    expect(wrapper.text()).toContain('登录')
+  })
 })
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,52 +1,126 @@
 <script setup lang="ts">
-import { onMounted, ref } from 'vue'
+import { onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import AdminPage from './components/AdminPage.vue'
 import BookListPage from './components/BookListPage.vue'
 import LoginPage from './components/LoginPage.vue'
 import WorkspaceView from './components/WorkspaceView.vue'
 import { useAuth } from './composables/useAuth'

+type AppRoute =
+  | { name: 'login' }
+  | { name: 'books' }
+  | { name: 'book'; bookId: string }
+  | { name: 'admin' }
+
 const { isLoggedIn, fetchMe } = useAuth()
-const currentBookId = ref<string | null>(null)
-const showAdmin = ref(false)
+const route = ref<AppRoute>(getInitialRoute())
+
+function parseRoute(pathname: string): AppRoute {
+  if (pathname === '/login') return { name: 'login' }
+  if (pathname === '/admin') return { name: 'admin' }
+  if (pathname === '/books') return { name: 'books' }
+
+  const bookMatch = pathname.match(/^\/books\/([^/]+)$/)
+  if (bookMatch?.[1]) {
+    try {
+      return { name: 'book', bookId: decodeURIComponent(bookMatch[1]) }
+    } catch {
+      return { name: 'books' }
+    }
+  }
+
+  return { name: 'books' }
+}
+
+function getInitialRoute(): AppRoute {
+  const parsed = parseRoute(window.location.pathname)
+  return isLoggedIn.value ? parsed : { name: 'login' }
+}
+
+function routeToPath(nextRoute: AppRoute): string {
+  if (nextRoute.name === 'login') return '/login'
+  if (nextRoute.name === 'admin') return '/admin'
+  if (nextRoute.name === 'book') return `/books/${encodeURIComponent(nextRoute.bookId)}`
+  return '/books'
+}
+
+function replaceRoute(nextRoute: AppRoute): void {
+  const path = routeToPath(nextRoute)
+  route.value = nextRoute
+  if (window.location.pathname !== path) {
+    window.history.replaceState(null, '', path)
+  }
+}
+
+function pushRoute(nextRoute: AppRoute): void {
+  const path = routeToPath(nextRoute)
+  route.value = nextRoute
+  if (window.location.pathname !== path) {
+    window.history.pushState(null, '', path)
+  }
+}
+
+function syncRouteForAuth(): void {
+  if (!isLoggedIn.value) {
+    replaceRoute({ name: 'login' })
+    return
+  }
+
+  if (route.value.name === 'login') {
+    replaceRoute({ name: 'books' })
+    return
+  }
+
+  replaceRoute(route.value)
+}
+
+function handlePopState(): void {
+  route.value = parseRoute(window.location.pathname)
+  syncRouteForAuth()
+}

 onMounted(async () => {
+  window.addEventListener('popstate', handlePopState)
  await fetchMe()
+  syncRouteForAuth()
+})
+
+onBeforeUnmount(() => {
+  window.removeEventListener('popstate', handlePopState)
 })

 async function handleLoginSuccess(): Promise<void> {
-  showAdmin.value = false
-  currentBookId.value = null
  await fetchMe()
+  if (isLoggedIn.value) {
+    pushRoute({ name: 'books' })
+  } else {
+    replaceRoute({ name: 'login' })
+  }
 }

 function openBook(id: string): void {
-  currentBookId.value = id
-  showAdmin.value = false
+  pushRoute({ name: 'book', bookId: id })
 }

 function backToList(): void {
-  currentBookId.value = null
+  pushRoute({ name: 'books' })
 }

 function openAdmin(): void {
-  showAdmin.value = true
-  currentBookId.value = null
+  pushRoute({ name: 'admin' })
 }

-function closeAdmin(): void {
-  showAdmin.value = false
-}
+watch(isLoggedIn, syncRouteForAuth)
 </script>

 <template>
-  <LoginPage v-if="!isLoggedIn" @success="handleLoginSuccess" />
+  <LoginPage v-if="route.name === 'login'" @success="handleLoginSuccess" />
  <template v-else>
-    <AdminPage v-if="showAdmin" @back="closeAdmin" />
+    <AdminPage v-if="route.name === 'admin'" @back="backToList" />
    <WorkspaceView
-      v-else-if="currentBookId"
-      :key="currentBookId"
-      :book-id="currentBookId"
+      v-else-if="route.name === 'book'"
+      :key="route.bookId"
+      :book-id="route.bookId"
      @back="backToList"
    />
    <BookListPage v-else @open="openBook" @admin="openAdmin" />
--- a/src/components/A4Workspace.test.ts
+++ b/src/components/A4Workspace.test.ts
@@ -0,0 +1,27 @@
+import { mount } from '@vue/test-utils'
+import { describe, expect, it } from 'vitest'
+import { createEmptyTeachingDesign } from '../domain/teachingDesign'
+import A4Workspace from './A4Workspace.vue'
+
+describe('A4Workspace', () => {
+  it('renders a selected lesson without cover state', () => {
+    const design = createEmptyTeachingDesign('1.md')
+    design.topic = 'CSS 弹性布局'
+
+    const wrapper = mount(A4Workspace, {
+      props: { selectedDesign: design },
+    })
+
+    expect(Object.keys(wrapper.props()).sort()).toEqual(['selectedDesign'])
+    expect(wrapper.find('.cover-page').exists()).toBe(false)
+    expect(wrapper.find('.teaching-design-page').exists()).toBe(true)
+  })
+
+  it('renders no page when no lesson is selected', () => {
+    const wrapper = mount(A4Workspace, {
+      props: { selectedDesign: null },
+    })
+
+    expect(wrapper.find('.page').exists()).toBe(false)
+  })
+})
--- a/src/components/A4Workspace.vue
+++ b/src/components/A4Workspace.vue
@@ -1,16 +1,12 @@
 <script setup lang="ts">
-import type { BookCover, TeachingDesign } from '../domain/teachingDesign'
-import CoverPage from './CoverPage.vue'
+import type { TeachingDesign } from '../domain/teachingDesign'
 import TeachingDesignPage from './TeachingDesignPage.vue'

 defineProps<{
-  cover: BookCover
-  selectedId: string
  selectedDesign: TeachingDesign | null
 }>()

 const emit = defineEmits<{
-  'update:cover': [patch: Partial<BookCover>]
  'update:design': [design: TeachingDesign]
 }>()
 </script>
@@ -18,16 +14,8 @@ const emit = defineEmits<{
 <template>
  <div class="a4-workspace">
    <div class="a4-paper">
-      <CoverPage
-        v-if="selectedId === 'cover'"
-        :course-name="cover.courseName"
-        :teacher-name="cover.teacherName"
-        :editable="true"
-        @update:course-name="emit('update:cover', { courseName: $event })"
-        @update:teacher-name="emit('update:cover', { teacherName: $event })"
-      />
      <TeachingDesignPage
-        v-else-if="selectedDesign"
+        v-if="selectedDesign"
        :design="selectedDesign"
        :editable="true"
        @update:design="emit('update:design', $event)"
--- a/src/components/BatchGenerateDialog.vue
+++ b/src/components/BatchGenerateDialog.vue
@@ -10,6 +10,7 @@ const props = defineProps<{
  total: number
  currentTopic: string
  error: string | null
+  defaultTheme?: string
 }>()

 const emit = defineEmits<{
@@ -19,7 +20,7 @@ const emit = defineEmits<{
 }>()

 const phase = ref<Phase>('theme')
-const theme = ref('')
+const theme = ref(props.defaultTheme ?? '')
 const outlineText = ref('')
 const outlineError = ref<string | null>(null)

@@ -61,7 +62,7 @@ function handleStart(): void {

 function handleClose(): void {
  phase.value = 'theme'
-  theme.value = ''
+  theme.value = props.defaultTheme ?? ''
  outlineText.value = ''
  outlineError.value = null
  emit('close')
@@ -97,7 +98,7 @@ function handleClose(): void {
      <!-- 第二步：确认/编辑大纲 -->
      <template v-else-if="phase === 'outline'">
        <p>AI 已生成以下大纲，可直接编辑后开始生成：</p>
-        <textarea v-model="outlineText" class="batch-topics-input" rows="12" />
+        <textarea v-model="outlineText" class="batch-topics-input" rows="24" />
        <p class="batch-topics-count">共 {{ parsedTopics.length }} 个课题</p>
        <div class="dialog-actions">
          <button type="button" :disabled="parsedTopics.length === 0" @click="handleStart">开始生成</button>
--- a/src/components/CoverPage.vue
+++ b/src/components/CoverPage.vue
@@ -1,40 +0,0 @@
-<script setup lang="ts">
-import EditableText from './EditableText.vue'
-
-defineProps<{
-  courseName: string
-  teacherName: string
-  editable: boolean
-}>()
-
-defineEmits<{
-  'update:courseName': [value: string]
-  'update:teacherName': [value: string]
-}>()
-</script>
-
-<template>
-  <section class="page cover-page">
-    <h1 class="cover-title">教学设计</h1>
-    <div class="cover-field">
-      <span class="cover-field-label">课程名称</span>
-      <EditableText
-        class="cover-field-value"
-        :model-value="courseName"
-        label="课程名称"
-        :editable="editable"
-        @update:model-value="$emit('update:courseName', $event)"
-      />
-    </div>
-    <div class="cover-field">
-      <span class="cover-field-label">教师姓名</span>
-      <EditableText
-        class="cover-field-value"
-        :model-value="teacherName"
-        label="教师姓名"
-        :editable="editable"
-        @update:model-value="$emit('update:teacherName', $event)"
-      />
-    </div>
-  </section>
-</template>
--- a/src/components/LessonSidebar.test.ts
+++ b/src/components/LessonSidebar.test.ts
@@ -7,7 +7,7 @@ describe('LessonSidebar', () => {
  it('emits a move when one lesson is dropped on another', async () => {
    const designs = [createEmptyTeachingDesign('1.md'), createEmptyTeachingDesign('2.md')]
    const wrapper = mount(LessonSidebar, {
-      props: { designs, selectedId: designs[0]?.id ?? 'cover' },
+      props: { designs, selectedId: designs[0]?.id ?? null },
    })

    await wrapper.get('[data-index="0"]').trigger('dragstart')
@@ -15,4 +15,14 @@ describe('LessonSidebar', () => {

    expect(wrapper.emitted('move')?.[0]).toEqual([0, 1])
  })
+
+  it('does not render a cover navigation item', () => {
+    const designs = [createEmptyTeachingDesign('1.md')]
+    const wrapper = mount(LessonSidebar, {
+      props: { designs, selectedId: null },
+    })
+
+    expect(wrapper.text()).not.toContain('封面')
+    expect(wrapper.find('.lesson-sidebar-cover').exists()).toBe(false)
+  })
 })
--- a/src/components/LessonSidebar.vue
+++ b/src/components/LessonSidebar.vue
@@ -4,11 +4,11 @@ import type { DesignId, TeachingDesign } from '../domain/teachingDesign'

 defineProps<{
  designs: TeachingDesign[]
-  selectedId: 'cover' | DesignId
+  selectedId: DesignId | null
 }>()

 const emit = defineEmits<{
-  select: [id: 'cover' | DesignId]
+  select: [id: DesignId]
  remove: [id: DesignId]
  move: [from: number, to: number]
 }>()
@@ -29,15 +29,6 @@ function onDrop(targetIndex: number): void {

 <template>
  <nav class="lesson-sidebar" aria-label="教案目录">
-    <button
-      type="button"
-      class="lesson-sidebar-item lesson-sidebar-cover"
-      :class="{ 'lesson-sidebar-item--active': selectedId === 'cover' }"
-      @click="emit('select', 'cover')"
-    >
-      封面
-    </button>
-
    <ul class="lesson-sidebar-list">
      <li
        v-for="(design, index) in designs"
--- a/src/components/TeachingDesignPage.test.ts
+++ b/src/components/TeachingDesignPage.test.ts
@@ -4,6 +4,16 @@ import { createEmptyTeachingDesign, type TeachingDesign } from '../domain/teachi
 import TeachingDesignPage from './TeachingDesignPage.vue'

 describe('TeachingDesignPage', () => {
+  it('does not show an empty additional content section while editing', () => {
+    const design = createEmptyTeachingDesign('1.md')
+
+    const wrapper = mount(TeachingDesignPage, {
+      props: { design, editable: true },
+    })
+
+    expect(wrapper.text()).not.toContain('附加内容')
+  })
+
  it('adds and removes teaching process rows', async () => {
    const design = createEmptyTeachingDesign('1.md')
    const wrapper = mount(TeachingDesignPage, {
--- a/src/components/TeachingDesignPage.vue
+++ b/src/components/TeachingDesignPage.vue
@@ -269,7 +269,7 @@ function removeStep(index: number): void {
      </tbody>
    </table>

-    <template v-if="design.additionalContent || editable">
+    <template v-if="design.additionalContent.trim()">
      <h2 class="section-heading">附加内容</h2>
      <EditableMarkdown
        :model-value="design.additionalContent"
--- a/src/components/WorkspaceToolbar.vue
+++ b/src/components/WorkspaceToolbar.vue
@@ -30,10 +30,10 @@ const saveStatusLabel: Record<SaveStatus, string> = {
  <header class="workspace-toolbar">
    <button type="button" data-testid="back" @click="$emit('back')">返回列表</button>
    <button type="button" data-testid="upload" @click="$emit('upload')">导入教案</button>
-    <button type="button" data-testid="generate" @click="$emit('generate')">生成教案</button>
+    <button type="button" data-testid="generate" @click="$emit('generate')">生成一篇</button>
    <button type="button" data-testid="batch-generate" @click="$emit('batchGenerate')">批量生成</button>
    <button type="button" data-testid="print" :disabled="lessonCount === 0" @click="$emit('print')">打印整册</button>
-    <button type="button" data-testid="export" :disabled="lessonCount === 0" @click="$emit('export')">导出 Markdown</button>
+    <button type="button" data-testid="export" :disabled="lessonCount === 0" @click="$emit('export')">导出 MD</button>
    <button type="button" data-testid="clear" :disabled="lessonCount === 0" @click="$emit('clear')">清空</button>

    <span class="workspace-toolbar-count">共 {{ lessonCount }} 课</span>
--- a/src/components/WorkspaceView.test.ts
+++ b/src/components/WorkspaceView.test.ts
@@ -2,10 +2,13 @@ import { flushPromises, mount } from '@vue/test-utils'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { createEmptyBook, createEmptyTeachingDesign } from '../domain/teachingDesign'
 import * as booksApi from '../services/booksApi'
+import * as zipExporter from '../services/zipExporter'
+import BatchGenerateDialog from './BatchGenerateDialog.vue'
 import GenerateLessonDialog from './GenerateLessonDialog.vue'
 import WorkspaceView from './WorkspaceView.vue'

 vi.mock('../services/booksApi')
+vi.mock('../services/zipExporter')

 function mockBook(data = createEmptyBook()): void {
  vi.mocked(booksApi.getBook).mockResolvedValue({
@@ -16,6 +19,32 @@ function mockBook(data = createEmptyBook()): void {
  })
 }

+function deferred<T>(): {
+  promise: Promise<T>
+  resolve: (value: T) => void
+  reject: (reason?: unknown) => void
+} {
+  let resolve!: (value: T) => void
+  let reject!: (reason?: unknown) => void
+  const promise = new Promise<T>((promiseResolve, promiseReject) => {
+    resolve = promiseResolve
+    reject = promiseReject
+  })
+  return { promise, resolve, reject }
+}
+
+function generatedLesson(topic: string): booksApi.GenerateResult {
+  return {
+    filename: `${topic}.md`,
+    markdown: [
+      `# ${topic} 教学设计`,
+      '|:---|:---|',
+      `| **课题** | **${topic}** |`,
+      '| **课时** | 1课时（40分钟） |',
+    ].join('\n'),
+  }
+}
+
 describe('WorkspaceView', () => {
  beforeEach(() => {
    vi.clearAllMocks()
@@ -74,6 +103,81 @@ describe('WorkspaceView', () => {
    expect(wrapper.text()).toContain('CSS 弹性布局')
  })

+  it('does not render cover navigation when lessons exist', async () => {
+    const data = createEmptyBook()
+    const design = createEmptyTeachingDesign('1.md')
+    data.designs.push(design)
+    data.selectedId = design.id
+    mockBook(data)
+
+    const wrapper = mount(WorkspaceView, { props: { bookId: 'b1' } })
+    await flushPromises()
+
+    expect(wrapper.text()).not.toContain('封面')
+  })
+
+  it('batch generates up to three lessons concurrently and keeps outline order', async () => {
+    mockBook()
+    const requests = new Map<string, ReturnType<typeof deferred<booksApi.GenerateResult>>>()
+    vi.mocked(booksApi.generateLesson).mockImplementation((topic) => {
+      const request = deferred<booksApi.GenerateResult>()
+      requests.set(topic, request)
+      return request.promise
+    })
+
+    const wrapper = mount(WorkspaceView, { props: { bookId: 'b1' } })
+    await flushPromises()
+
+    await wrapper.get('[data-testid="batch-generate"]').trigger('click')
+    wrapper.getComponent(BatchGenerateDialog).vm.$emit('start', [
+      '第一课',
+      '第二课',
+      '第三课',
+      '第四课',
+      '第五课',
+    ])
+    await flushPromises()
+
+    expect(booksApi.generateLesson).toHaveBeenCalledTimes(3)
+    expect(booksApi.generateLesson).toHaveBeenNthCalledWith(1, '第一课')
+    expect(booksApi.generateLesson).toHaveBeenNthCalledWith(2, '第二课')
+    expect(booksApi.generateLesson).toHaveBeenNthCalledWith(3, '第三课')
+
+    requests.get('第三课')!.resolve(generatedLesson('第三课'))
+    await flushPromises()
+    expect(booksApi.generateLesson).toHaveBeenCalledTimes(4)
+    expect(booksApi.generateLesson).toHaveBeenNthCalledWith(4, '第四课')
+    expect(wrapper.findAll('.lesson-sidebar-topic').map((node) => node.text())).toEqual([])
+
+    requests.get('第四课')!.resolve(generatedLesson('第四课'))
+    await flushPromises()
+    expect(booksApi.generateLesson).toHaveBeenCalledTimes(5)
+    expect(booksApi.generateLesson).toHaveBeenNthCalledWith(5, '第五课')
+
+    requests.get('第一课')!.resolve(generatedLesson('第一课'))
+    await flushPromises()
+    expect(wrapper.findAll('.lesson-sidebar-topic').map((node) => node.text())).toEqual(['第一课'])
+
+    requests.get('第二课')!.resolve(generatedLesson('第二课'))
+    await flushPromises()
+    expect(wrapper.findAll('.lesson-sidebar-topic').map((node) => node.text())).toEqual([
+      '第一课',
+      '第二课',
+      '第三课',
+      '第四课',
+    ])
+
+    requests.get('第五课')!.resolve(generatedLesson('第五课'))
+    await flushPromises()
+    expect(wrapper.findAll('.lesson-sidebar-topic').map((node) => node.text())).toEqual([
+      '第一课',
+      '第二课',
+      '第三课',
+      '第四课',
+      '第五课',
+    ])
+  })
+
  it('clears the lessons after confirmation', async () => {
    const data = createEmptyBook()
    data.designs.push(createEmptyTeachingDesign('1.md'))
@@ -87,4 +191,20 @@ describe('WorkspaceView', () => {

    expect(wrapper.text()).toContain('点击或拖拽上传')
  })
+
+  it('downloads the exported zip with the book name', async () => {
+    const data = createEmptyBook()
+    data.designs.push(createEmptyTeachingDesign('1.md'))
+    const blob = new Blob(['zip'])
+    mockBook(data)
+    vi.mocked(zipExporter.createBookZip).mockResolvedValue(blob)
+
+    const wrapper = mount(WorkspaceView, { props: { bookId: 'b1' } })
+    await flushPromises()
+
+    await wrapper.get('[data-testid="export"]').trigger('click')
+    await flushPromises()
+
+    expect(zipExporter.downloadBlob).toHaveBeenCalledWith(blob, '示例整本.zip')
+  })
 })
--- a/src/components/WorkspaceView.vue
+++ b/src/components/WorkspaceView.vue
@@ -13,6 +13,9 @@ import PrintBook from './PrintBook.vue'
 import UploadDropzone from './UploadDropzone.vue'
 import WorkspaceToolbar from './WorkspaceToolbar.vue'

+const BATCH_GENERATE_CONCURRENCY = 3
+const DEFAULT_EXPORT_ZIP_NAME = 'teaching-design-book'
+
 const props = defineProps<{ bookId: string }>()

 defineEmits<{ back: [] }>()
@@ -32,10 +35,10 @@ const {
  selectPage,
  moveDesign,
  removeDesign,
-  updateCover,
  updateDesign,
  clearBook,
  generateLesson,
+  generateLessons,
  regenerateLesson,
 } = useTeachingBook(props.bookId)

@@ -102,10 +105,15 @@ function handlePrint(): void {
  document.title = prev
 }

+function createExportZipFilename(name: string): string {
+  const stem = name.trim().replace(/[\\/:*?"<>|]/g, '_')
+  return `${stem || DEFAULT_EXPORT_ZIP_NAME}.zip`
+}
+
 async function handleExport(): Promise<void> {
  try {
    const blob = await createBookZip(book.value.designs)
-    downloadBlob(blob, 'teaching-design-book.zip')
+    downloadBlob(blob, createExportZipFilename(bookName.value))
  } catch {
    errorMessage.value = '导出失败，请重试。'
  }
@@ -154,15 +162,19 @@ async function handleBatchStart(topics: string[]): Promise<void> {
  batchTotal.value = topics.length
  batchError.value = null

-  for (const topic of topics) {
-    if (batchCancelled.value) break
-    batchCurrentTopic.value = topic
-    const result = await generateLesson(topic)
-    if (!result.ok) {
-      batchError.value = result.message
-      break
-    }
-    batchDone.value++
+  const result = await generateLessons(topics, {
+    concurrency: BATCH_GENERATE_CONCURRENCY,
+    isCancelled: () => batchCancelled.value,
+    onTopicStart: (topic) => {
+      batchCurrentTopic.value = topic
+    },
+    onLessonComplete: (count) => {
+      batchDone.value += count
+    },
+  })
+
+  if (!result.ok) {
+    batchError.value = result.message
  }

  batchRunning.value = false
@@ -248,6 +260,7 @@ function closeFixDialog(): void {
        :total="batchTotal"
        :current-topic="batchCurrentTopic"
        :error="batchError"
+        :default-theme="bookName"
        @start="handleBatchStart"
        @cancel="handleBatchCancel"
        @close="closeBatchDialog"
@@ -298,10 +311,7 @@ function closeFixDialog(): void {
            @move="moveDesign"
          />
          <A4Workspace
-            :cover="book.cover"
-            :selected-id="book.selectedId"
            :selected-design="selectedDesign"
-            @update:cover="updateCover"
            @update:design="handleDesignUpdate"
          />
        </div>
--- a/src/composables/useTeachingBook.test.ts
+++ b/src/composables/useTeachingBook.test.ts
@@ -10,15 +10,58 @@ function mockGetBook(data: TeachingBook, id = 'b1'): void {
  vi.mocked(booksApi.getBook).mockResolvedValue({ id, name: '示例整本', updatedAt: data.updatedAt, data })
 }

+function createBookWithDesign(filename = '1.md'): { data: TeachingBook; design: ReturnType<typeof createEmptyTeachingDesign> } {
+  const data = createEmptyBook()
+  const design = createEmptyTeachingDesign(filename)
+  data.designs.push(design)
+  data.selectedId = design.id
+  return { data, design }
+}
+
+function generatedMarkdownWithAdditionalSection(topic: string): string {
+  return [
+    `# ${topic} 教学设计`,
+    '| | |',
+    '|:---|:---|',
+    `| **课题** | **${topic}** |`,
+    '| **课时** | 1课时（40分钟） |',
+    '| **教学目标** | **知识目标**：理解概念。<br>**技能目标**：完成任务。<br>**素养目标**：规范表达。 |',
+    '| **教学重难点** | **重点**：任务流程。<br>**难点**：问题定位。 |',
+    '| **教学资源准备** | 机房、示例文件。 |',
+    '',
+    '## 教学过程',
+    '',
+    '| 教学环节 | 教学内容 | 教师活动 | 学生活动 | 设计意图 |',
+    '|:---|:---|:---|:---|:---|',
+    '| **1. 导入**<br>（5分钟） | 引出任务。 | **情境导入**<br>展示案例。 | **观察思考**<br>回答问题。 | 明确目标。 |',
+    '',
+    '## 板书设计',
+    '',
+    '```text',
+    `${topic}`,
+    '```',
+    '',
+    '## 教学成效与反思',
+    '',
+    '| | |',
+    '|:---|:---|',
+    '| **教学成效** | 学生完成任务。 |',
+    '| **教学反思** | 后续加强练习。 |',
+    '',
+    '## 附加说明',
+    '',
+    '这是模型额外生成的内容。',
+  ].join('\n')
+}
+
 describe('useTeachingBook', () => {
  beforeEach(() => {
    vi.clearAllMocks()
    vi.useFakeTimers()
  })

-  it('loads the book from the API', async () => {
-    const data = createEmptyBook()
-    data.cover.courseName = 'Web 前端开发'
+  it('loads the book from the API without cover state', async () => {
+    const { data } = createBookWithDesign()
    mockGetBook(data)

    const store = useTeachingBook('b1')
@@ -26,7 +69,8 @@ describe('useTeachingBook', () => {

    expect(booksApi.getBook).toHaveBeenCalledWith('b1')
    expect(store.loadStatus.value).toBe('loaded')
-    expect(store.book.value.cover.courseName).toBe('Web 前端开发')
+    expect(store.book.value).not.toHaveProperty('cover')
+    expect(store.book.value.selectedId).toBe(data.selectedId)
  })

  it('sets loadStatus to error when loading fails', async () => {
@@ -82,13 +126,16 @@ describe('useTeachingBook', () => {
  })

  it('autosaves the book via the API after the debounce delay', async () => {
-    mockGetBook(createEmptyBook())
+    const { data, design } = createBookWithDesign()
+    mockGetBook(data)
    vi.mocked(booksApi.updateBook).mockResolvedValue({ id: 'b1', name: '示例整本', updatedAt: 'later' })

    const store = useTeachingBook('b1')
    await flushPromises()

-    store.updateCover({ courseName: '新课程名' })
+    store.updateDesign(design.id, (current) => {
+      current.title = '新课程名'
+    })
    await vi.advanceTimersByTimeAsync(300)

    expect(booksApi.updateBook).toHaveBeenCalledWith('b1', store.book.value)
@@ -96,13 +143,16 @@ describe('useTeachingBook', () => {
  })

  it('sets saveStatus to error when autosave fails', async () => {
-    mockGetBook(createEmptyBook())
+    const { data, design } = createBookWithDesign()
+    mockGetBook(data)
    vi.mocked(booksApi.updateBook).mockRejectedValue(new Error('保存失败。'))

    const store = useTeachingBook('b1')
    await flushPromises()

-    store.updateCover({ courseName: '新课程名' })
+    store.updateDesign(design.id, (current) => {
+      current.title = '新课程名'
+    })
    await vi.advanceTimersByTimeAsync(300)

    expect(store.saveStatus.value).toBe('error')
@@ -126,6 +176,25 @@ describe('useTeachingBook', () => {
    expect(store.book.value.selectedId).toBe(store.book.value.designs[0]?.id)
  })

+  it('generateLesson discards unclassified additional content from AI output', async () => {
+    mockGetBook(createEmptyBook())
+    vi.mocked(booksApi.generateLesson).mockResolvedValue({
+      filename: 'css-flex.md',
+      markdown: generatedMarkdownWithAdditionalSection('CSS 弹性布局'),
+    })
+
+    const store = useTeachingBook('b1')
+    await flushPromises()
+
+    const result = await store.generateLesson('CSS 弹性布局')
+
+    expect(result).toEqual({ ok: true })
+    expect(store.book.value.designs[0]?.additionalContent).toBe('')
+    expect(store.book.value.designs[0]?.warnings).not.toContainEqual(
+      expect.objectContaining({ code: 'unclassified-content' }),
+    )
+  })
+
  it('generateLesson returns an error when the API call fails', async () => {
    mockGetBook(createEmptyBook())
    vi.mocked(booksApi.generateLesson).mockRejectedValue(new Error('Deepseek 请求失败。'))
@@ -139,10 +208,8 @@ describe('useTeachingBook', () => {
    expect(store.book.value.designs).toHaveLength(0)
  })

-  it('clearBook empties designs but keeps the cover', async () => {
-    const data = createEmptyBook()
-    data.cover.courseName = 'Web 前端开发'
-    data.designs.push(createEmptyTeachingDesign('1.md'))
+  it('clearBook empties designs and clears selection', async () => {
+    const { data } = createBookWithDesign()
    mockGetBook(data)

    const store = useTeachingBook('b1')
@@ -151,7 +218,22 @@ describe('useTeachingBook', () => {
    store.clearBook()

    expect(store.book.value.designs).toEqual([])
-    expect(store.book.value.cover.courseName).toBe('Web 前端开发')
-    expect(store.book.value.selectedId).toBe('cover')
+    expect(store.book.value).not.toHaveProperty('cover')
+    expect(store.book.value.selectedId).toBeNull()
+  })
+
+  it('selects null after removing the last selected lesson', async () => {
+    const { data, design } = createBookWithDesign()
+    mockGetBook(data)
+
+    const store = useTeachingBook('b1')
+    await flushPromises()
+
+    store.removeDesign(design.id)
+    await flushPromises()
+
+    expect(store.book.value.designs).toEqual([])
+    expect(store.book.value.selectedId).toBeNull()
+    expect(store.selectedDesign.value).toBeNull()
  })
 })
--- a/src/composables/useTeachingBook.ts
+++ b/src/composables/useTeachingBook.ts
@@ -1,7 +1,6 @@
 import { nextTick, ref, watch, type Ref } from 'vue'
 import {
  createEmptyBook,
-  type BookCover,
  type DesignId,
  type TeachingBook,
  type TeachingDesign,
@@ -20,6 +19,17 @@ export type LoadStatus = 'loading' | 'loaded' | 'error'

 export type GenerateLessonResult = { ok: true } | { ok: false; message: string }

+export type BatchGenerateLessonResult =
+  | { ok: true; completed: number }
+  | { ok: false; completed: number; message: string }
+
+export interface BatchGenerateLessonOptions {
+  concurrency?: number
+  isCancelled?: () => boolean
+  onTopicStart?: (topic: string) => void
+  onLessonComplete?: (count: number) => void
+}
+
 export interface ImportResult {
  imported: number
  failed: Array<{ filename: string; message: string }>
@@ -38,13 +48,16 @@ export interface TeachingBookStore {
  warningCount: Ref<number>
  importFiles: (files: readonly File[], strategy: DuplicateStrategy) => Promise<ImportResult>
  detectDuplicates: (files: readonly File[]) => string[]
-  selectPage: (id: 'cover' | DesignId) => void
+  selectPage: (id: DesignId) => void
  moveDesign: (from: number, to: number) => void
  removeDesign: (id: DesignId) => void
-  updateCover: (patch: Partial<BookCover>) => void
  updateDesign: (id: DesignId, updater: (design: TeachingDesign) => void) => void
  clearBook: () => void
  generateLesson: (topic: string) => Promise<GenerateLessonResult>
+  generateLessons: (
+    topics: readonly string[],
+    options?: BatchGenerateLessonOptions,
+  ) => Promise<BatchGenerateLessonResult>
  regenerateLesson: (id: DesignId) => Promise<GenerateLessonResult>
 }

@@ -67,7 +80,7 @@ export function useTeachingBook(bookId: string): TeachingBookStore {
    const current = book.value
    hasDesigns.value = current.designs.length > 0
    selectedDesign.value =
-      current.selectedId === 'cover'
+      current.selectedId === null
        ? null
        : current.designs.find((design) => design.id === current.selectedId) ?? null
    warningCount.value = current.designs.reduce(
@@ -176,7 +189,7 @@ export function useTeachingBook(bookId: string): TeachingBookStore {
      }
    }

-    if (imported > 0 && book.value.selectedId === 'cover' && book.value.designs.length > 0) {
+    if (imported > 0 && book.value.selectedId === null && book.value.designs.length > 0) {
      book.value.selectedId = book.value.designs[0]!.id
    }

@@ -187,7 +200,7 @@ export function useTeachingBook(bookId: string): TeachingBookStore {
    return { imported, failed, duplicates }
  }

-  function selectPage(id: 'cover' | DesignId): void {
+  function selectPage(id: DesignId): void {
    book.value.selectedId = id
  }

@@ -210,17 +223,12 @@ export function useTeachingBook(bookId: string): TeachingBookStore {
    designs.splice(index, 1)

    if (book.value.selectedId === id) {
-      book.value.selectedId = designs[index]?.id ?? designs[index - 1]?.id ?? 'cover'
+      book.value.selectedId = designs[index]?.id ?? designs[index - 1]?.id ?? null
    }

    touch()
  }

-  function updateCover(patch: Partial<BookCover>): void {
-    Object.assign(book.value.cover, patch)
-    touch()
-  }
-
  function updateDesign(id: DesignId, updater: (design: TeachingDesign) => void): void {
    const design = book.value.designs.find((candidate) => candidate.id === id)
    if (!design) {
@@ -232,14 +240,22 @@ export function useTeachingBook(bookId: string): TeachingBookStore {

  function clearBook(): void {
    book.value.designs = []
-    book.value.selectedId = 'cover'
+    book.value.selectedId = null
    touch()
  }

+  function removeGeneratedAdditionalContent(design: TeachingDesign): TeachingDesign {
+    design.additionalContent = ''
+    design.warnings = design.warnings.filter((warning) => warning.code !== 'unclassified-content')
+    return design
+  }
+
  async function generateLesson(topic: string): Promise<GenerateLessonResult> {
    try {
      const result = await booksApi.generateLesson(topic)
-      const design = parseTeachingDesign(result.filename, result.markdown)
+      const design = removeGeneratedAdditionalContent(
+        parseTeachingDesign(result.filename, result.markdown),
+      )
      book.value.designs.push(design)
      book.value.selectedId = design.id
      touch()
@@ -249,6 +265,66 @@ export function useTeachingBook(bookId: string): TeachingBookStore {
    }
  }

+  async function generateLessons(
+    topics: readonly string[],
+    options: BatchGenerateLessonOptions = {},
+  ): Promise<BatchGenerateLessonResult> {
+    const concurrency = Math.max(1, options.concurrency ?? 3)
+    const workerCount = Math.min(concurrency, topics.length)
+    const results = new Array<TeachingDesign | undefined>(topics.length)
+    let nextStartIndex = 0
+    let nextAppendIndex = 0
+    let appendedCount = 0
+    let firstError: string | null = null
+
+    function appendReadyLessons(): void {
+      let readyCount = 0
+
+      while (nextAppendIndex < results.length) {
+        const design = results[nextAppendIndex]
+        if (!design) break
+        book.value.designs.push(design)
+        book.value.selectedId = design.id
+        nextAppendIndex++
+        readyCount++
+      }
+
+      if (readyCount > 0) {
+        appendedCount += readyCount
+        touch()
+        options.onLessonComplete?.(readyCount)
+      }
+    }
+
+    async function runWorker(): Promise<void> {
+      while (!firstError && !options.isCancelled?.()) {
+        const index = nextStartIndex
+        if (index >= topics.length) return
+
+        nextStartIndex++
+        const topic = topics[index]!
+        options.onTopicStart?.(topic)
+
+        try {
+          const result = await booksApi.generateLesson(topic)
+          results[index] = removeGeneratedAdditionalContent(
+            parseTeachingDesign(result.filename, result.markdown),
+          )
+          appendReadyLessons()
+        } catch (error) {
+          firstError = error instanceof Error ? error.message : '生成失败。'
+        }
+      }
+    }
+
+    await Promise.all(Array.from({ length: workerCount }, () => runWorker()))
+    appendReadyLessons()
+
+    return firstError
+      ? { ok: false, completed: appendedCount, message: firstError }
+      : { ok: true, completed: appendedCount }
+  }
+
  async function regenerateLesson(id: DesignId): Promise<GenerateLessonResult> {
    const existing = book.value.designs.find((d) => d.id === id)
    if (!existing) return { ok: false, message: '找不到该教案。' }
@@ -256,7 +332,9 @@ export function useTeachingBook(bookId: string): TeachingBookStore {
    const topic = existing.originalFilename.replace(/\.md$/i, '')
    try {
      const result = await booksApi.generateLesson(topic)
-      const newDesign = parseTeachingDesign(result.filename, result.markdown)
+      const newDesign = removeGeneratedAdditionalContent(
+        parseTeachingDesign(result.filename, result.markdown),
+      )
      const index = book.value.designs.findIndex((d) => d.id === id)
      if (index !== -1) {
        book.value.designs.splice(index, 1, newDesign)
@@ -286,10 +364,10 @@ export function useTeachingBook(bookId: string): TeachingBookStore {
    selectPage,
    moveDesign,
    removeDesign,
-    updateCover,
    updateDesign,
    clearBook,
    generateLesson,
+    generateLessons,
    regenerateLesson,
  }
 }
--- a/src/domain/teachingDesign.test.ts
+++ b/src/domain/teachingDesign.test.ts
@@ -53,24 +53,22 @@ describe('createEmptyTeachingDesign', () => {
 })

 describe('createEmptyBook', () => {
-  it('creates the schema defaults with cover selected and an ISO timestamp', () => {
+  it('creates the schema defaults with no selected page and an ISO timestamp', () => {
    const book = createEmptyBook()

    expect(book.schemaVersion).toBe(BOOK_SCHEMA_VERSION)
-    expect(book.selectedId).toBe('cover')
+    expect(book.selectedId).toBeNull()
+    expect(book).not.toHaveProperty('cover')
    expect(new Date(book.updatedAt).toISOString()).toBe(book.updatedAt)
  })

-  it('creates independent cover and design collections', () => {
+  it('creates independent design collections', () => {
    const first = createEmptyBook()
    const second = createEmptyBook()

-    first.cover.courseName = 'Changed'
    first.designs.push(createEmptyTeachingDesign('1.md'))

-    expect(first.cover).not.toBe(second.cover)
    expect(first.designs).not.toBe(second.designs)
-    expect(second.cover.courseName).toBe('')
    expect(second.designs).toEqual([])
  })
 })
@@ -79,7 +77,7 @@ describe('domain types', () => {
  it('uses branded string design IDs and literal schema versions', () => {
    expectTypeOf<DesignId>().toExtend<string>()
    expectTypeOf<TeachingDesign['id']>().toEqualTypeOf<DesignId>()
-    expectTypeOf<TeachingBook['selectedId']>().toEqualTypeOf<'cover' | DesignId>()
+    expectTypeOf<TeachingBook['selectedId']>().toEqualTypeOf<DesignId | null>()
    expectTypeOf<TeachingBook['schemaVersion']>().toEqualTypeOf<
      typeof BOOK_SCHEMA_VERSION
    >()
--- a/src/domain/teachingDesign.ts
+++ b/src/domain/teachingDesign.ts
@@ -50,16 +50,10 @@ export interface TeachingDesign {
  warnings: ParseWarning[]
 }

-export interface BookCover {
-  courseName: string
-  teacherName: string
-}
-
 export interface TeachingBook {
  schemaVersion: typeof BOOK_SCHEMA_VERSION
-  cover: BookCover
  designs: TeachingDesign[]
-  selectedId: 'cover' | DesignId
+  selectedId: DesignId | null
  updatedAt: string
 }

@@ -104,9 +98,8 @@ export function createEmptyTeachingDesign(filename: string): TeachingDesign {
 export function createEmptyBook(): TeachingBook {
  return {
    schemaVersion: BOOK_SCHEMA_VERSION,
-    cover: { courseName: '', teacherName: '' },
    designs: [],
-    selectedId: 'cover',
+    selectedId: null,
    updatedAt: new Date().toISOString(),
  }
 }
--- a/src/style.css
+++ b/src/style.css
@@ -82,10 +82,10 @@ input {
 }

 .ui-button:disabled {
-  color: var(--muted);
+  background: #f4f6f7;
+  color: #43515c;
  border-color: var(--line);
  cursor: not-allowed;
-  opacity: 0.6;
 }

 .ui-button--primary {
@@ -195,10 +195,10 @@ input {
 }

 .workspace-toolbar button:disabled {
-  color: var(--muted);
+  background: #f4f6f7;
+  color: #43515c;
  border-color: var(--line);
  cursor: not-allowed;
-  opacity: 0.6;
 }

 .workspace-toolbar-count,
@@ -229,8 +229,8 @@ input {

 /* Sidebar */
 .lesson-sidebar {
-  width: 260px;
-  flex: 0 0 260px;
+  width: 360px;
+  flex: 0 0 360px;
  background: #fff;
  border-right: 1px solid var(--line);
  overflow-y: auto;
@@ -238,17 +238,6 @@ input {
  flex-direction: column;
 }

-.lesson-sidebar-cover {
-  border: none;
-  border-bottom: 1px solid var(--line);
-  background: none;
-  text-align: left;
-  padding: 12px 16px;
-  font-weight: 600;
-  color: var(--green-700);
-  cursor: pointer;
-}
-
 .lesson-sidebar-list {
  list-style: none;
  margin: 0;
@@ -311,7 +300,7 @@ input {
  color: var(--muted);
  cursor: pointer;
  padding: 0 12px;
-  font-size: 16px;
+  font-size: 24px;
 }

 .lesson-sidebar-remove:hover {
@@ -346,41 +335,6 @@ input {
  box-shadow: none;
 }

-/* Cover page */
-.cover-page {
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: center;
-  text-align: center;
-  gap: 24px;
-}
-
-.cover-title {
-  font-size: 40px;
-  font-weight: 700;
-  letter-spacing: 0.2em;
-  color: var(--green-700);
-  margin: 0;
-}
-
-.cover-field {
-  display: flex;
-  align-items: center;
-  gap: 12px;
-  font-size: 18px;
-}
-
-.cover-field-label {
-  color: var(--muted);
-}
-
-.cover-field-value {
-  min-width: 12em;
-  text-align: left;
-  border-bottom: 1px solid var(--line);
-}
-
 /* Teaching design page */
 .teaching-design-page {
  display: flex;
@@ -733,6 +687,7 @@ table {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 12px;
+  width: 100%;
 }

 .book-list {
--- a/src/style.test.ts
+++ b/src/style.test.ts
@@ -0,0 +1,31 @@
+import { describe, expect, it } from 'vitest'
+import './style.css'
+
+describe('shared button styles', () => {
+  it('keeps disabled shared button text readable without lowering opacity', () => {
+    const button = document.createElement('button')
+    button.className = 'ui-button ui-button--primary'
+    button.disabled = true
+    button.textContent = 'Create'
+    document.body.append(button)
+
+    expect(getComputedStyle(button).opacity).toBe('1')
+
+    button.remove()
+  })
+
+  it('keeps disabled toolbar button text readable without lowering opacity', () => {
+    const toolbar = document.createElement('div')
+    toolbar.className = 'workspace-toolbar'
+
+    const button = document.createElement('button')
+    button.disabled = true
+    button.textContent = 'Export'
+    toolbar.append(button)
+    document.body.append(toolbar)
+
+    expect(getComputedStyle(button).opacity).toBe('1')
+
+    toolbar.remove()
+  })
+})
Author	SHA1	Message	Date
yuetsh	804224fc3c	update	2026-06-16 09:01:02 -06:00
yuetsh	494fbef7b4	update	2026-06-16 08:58:06 -06:00
yuetsh	660039b3cf	update	2026-06-16 08:18:10 -06:00
yuetsh	19cc1ffdfa	docs: add frontend routing design	2026-06-16 07:57:22 -06:00
yuetsh	dcec78d4b7	fix	2026-06-16 07:51:38 -06:00
yuetsh	8b0e4df43d	feat: add concurrent batch lesson generation	2026-06-16 07:33:29 -06:00
yuetsh	2321b5f68e	Merge branch 'remove-cover-page'	2026-06-16 07:17:25 -06:00
yuetsh	7b95324649	feat: remove cover page	2026-06-16 07:14:39 -06:00
yuetsh	a2534459d0	fix	2026-06-16 07:08:13 -06:00
yuetsh	085f70bd64	docs: add remove cover page plan	2026-06-16 07:02:10 -06:00