diff --git a/src/components/WorkspaceToolbar.vue b/src/components/WorkspaceToolbar.vue
index 1b8d7a3..e31dc14 100644
--- a/src/components/WorkspaceToolbar.vue
+++ b/src/components/WorkspaceToolbar.vue
@@ -8,7 +8,6 @@ const props = defineProps<{
 }>()
 
 defineEmits<{
-  upload: []
   print: []
   export: []
   clear: []
@@ -29,7 +28,6 @@ const saveStatusLabel: Record<SaveStatus, string> = {
 <template>
   <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>
diff --git a/src/components/WorkspaceView.vue b/src/components/WorkspaceView.vue
index 717bfdd..3d5ef6f 100644
--- a/src/components/WorkspaceView.vue
+++ b/src/components/WorkspaceView.vue
@@ -1,16 +1,14 @@
 <script setup lang="ts">
 import { ref } from 'vue'
-import { type DuplicateStrategy, useTeachingBook } from '../composables/useTeachingBook'
+import { useTeachingBook } from '../composables/useTeachingBook'
 import type { TeachingDesign } from '../../shared/domain/teachingDesign'
 import { createBookZip, downloadBlob } from '../services/zipExporter'
 import A4Workspace from './A4Workspace.vue'
 import BatchGenerateDialog from './BatchGenerateDialog.vue'
 import FixBrokenDialog from './FixBrokenDialog.vue'
 import GenerateLessonDialog from './GenerateLessonDialog.vue'
-import ImportConflictDialog from './ImportConflictDialog.vue'
 import LessonSidebar from './LessonSidebar.vue'
 import PrintBook from './PrintBook.vue'
-import UploadDropzone from './UploadDropzone.vue'
 import WorkspaceToolbar from './WorkspaceToolbar.vue'
 
 const BATCH_GENERATE_CONCURRENCY = 3
@@ -30,8 +28,6 @@ const {
   selectedDesign,
   hasDesigns,
   warningCount,
-  importFiles,
-  detectDuplicates,
   selectPage,
   moveDesign,
   removeDesign,
@@ -42,10 +38,7 @@ const {
   regenerateLesson,
 } = useTeachingBook(props.bookId)
 
-const pendingFiles = ref<File[]>([])
-const duplicateNames = ref<string[]>([])
 const errorMessage = ref<string | null>(null)
-const uploadRef = ref<InstanceType<typeof UploadDropzone> | null>(null)
 
 const showGenerateDialog = ref(false)
 const generateLoading = ref(false)
@@ -67,37 +60,6 @@ const fixCurrentTopic = ref('')
 const fixError = ref<string | null>(null)
 const fixCancelled = ref(false)
 
-async function runImport(files: File[], strategy: DuplicateStrategy): Promise<void> {
-  const result = await importFiles(files, strategy)
-  if (result.failed.length > 0) {
-    errorMessage.value = `${result.failed.length} 个文件导入失败：${result.failed
-      .map((entry) => `${entry.filename}（${entry.message}）`)
-      .join('、')}`
-  }
-}
-
-async function handleFiles(files: File[]): Promise<void> {
-  const duplicates = detectDuplicates(files)
-  if (duplicates.length > 0) {
-    pendingFiles.value = files
-    duplicateNames.value = duplicates
-    return
-  }
-  await runImport(files, 'keep')
-}
-
-async function resolveConflict(strategy: DuplicateStrategy | 'cancel'): Promise<void> {
-  const files = pendingFiles.value
-  pendingFiles.value = []
-  duplicateNames.value = []
-  if (strategy === 'cancel') return
-  await runImport(files, strategy)
-}
-
-function triggerUpload(): void {
-  uploadRef.value?.openPicker()
-}
-
 function handlePrint(): void {
   const prev = document.title
   document.title = bookName.value || prev
@@ -239,13 +201,6 @@ function closeFixDialog(): void {
     </div>
 
     <template v-else>
-      <ImportConflictDialog
-        v-if="duplicateNames.length > 0"
-        :duplicates="duplicateNames"
-        @replace="resolveConflict('replace')"
-        @keep="resolveConflict('keep')"
-        @cancel="resolveConflict('cancel')"
-      />
       <GenerateLessonDialog
         v-if="showGenerateDialog"
         :loading="generateLoading"
@@ -290,7 +245,6 @@ function closeFixDialog(): void {
         :warning-count="warningCount"
         :save-status="saveStatus"
         @back="$emit('back')"
-        @upload="triggerUpload"
         @generate="openGenerateDialog"
         @batch-generate="showBatchDialog = true"
         @fix-broken="openFixDialog"
@@ -299,24 +253,19 @@ function closeFixDialog(): void {
         @clear="handleClear"
       />
 
-      <UploadDropzone v-if="!hasDesigns" @files="handleFiles" />
-
-      <template v-else>
-        <div class="workspace-layout">
-          <LessonSidebar
-            :designs="book.designs"
-            :selected-id="book.selectedId"
-            @select="selectPage"
-            @remove="removeDesign"
-            @move="moveDesign"
-          />
-          <A4Workspace
-            :selected-design="selectedDesign"
-            @update:design="handleDesignUpdate"
-          />
-        </div>
-        <UploadDropzone ref="uploadRef" compact class="visually-hidden" @files="handleFiles" />
-      </template>
+      <div v-if="hasDesigns" class="workspace-layout">
+        <LessonSidebar
+          :designs="book.designs"
+          :selected-id="book.selectedId"
+          @select="selectPage"
+          @remove="removeDesign"
+          @move="moveDesign"
+        />
+        <A4Workspace
+          :selected-design="selectedDesign"
+          @update:design="handleDesignUpdate"
+        />
+      </div>
 
       <PrintBook :designs="book.designs" />
     </template>
diff --git a/src/composables/useTeachingBook.ts b/src/composables/useTeachingBook.ts
index 06db554..43d0271 100644
--- a/src/composables/useTeachingBook.ts
+++ b/src/composables/useTeachingBook.ts
@@ -7,12 +7,9 @@ import {
 } from '../../shared/domain/teachingDesign'
 import * as booksApi from '../services/booksApi'
 import { parseTeachingDesign } from '../services/markdownParser'
-import { sortFilesNaturally } from '../services/naturalSort'
 
 const AUTOSAVE_DELAY_MS = 300
 
-export type DuplicateStrategy = 'replace' | 'keep'
-
 export type SaveStatus = 'idle' | 'saving' | 'saved' | 'error'
 
 export type LoadStatus = 'loading' | 'loaded' | 'error'
@@ -30,12 +27,6 @@ export interface BatchGenerateLessonOptions {
   onLessonComplete?: (count: number) => void
 }
 
-export interface ImportResult {
-  imported: number
-  failed: Array<{ filename: string; message: string }>
-  duplicates: string[]
-}
-
 export interface TeachingBookStore {
   book: Ref<TeachingBook>
   bookName: Ref<string>
@@ -46,8 +37,6 @@ export interface TeachingBookStore {
   selectedDesign: Ref<TeachingDesign | null>
   hasDesigns: Ref<boolean>
   warningCount: Ref<number>
-  importFiles: (files: readonly File[], strategy: DuplicateStrategy) => Promise<ImportResult>
-  detectDuplicates: (files: readonly File[]) => string[]
   selectPage: (id: DesignId) => void
   moveDesign: (from: number, to: number) => void
   removeDesign: (id: DesignId) => void
@@ -142,64 +131,6 @@ export function useTeachingBook(bookId: string): TeachingBookStore {
 
   void load()
 
-  function detectDuplicates(files: readonly File[]): string[] {
-    const existingNames = new Set(book.value.designs.map((design) => design.originalFilename))
-    return files.map((file) => file.name).filter((name) => existingNames.has(name))
-  }
-
-  async function importFiles(
-    files: readonly File[],
-    strategy: DuplicateStrategy,
-  ): Promise<ImportResult> {
-    const markdownFiles = files.filter((file) => /\.md$/i.test(file.name))
-    const failed: ImportResult['failed'] = files
-      .filter((file) => !/\.md$/i.test(file.name))
-      .map((file) => ({ filename: file.name, message: '仅支持 .md 文件。' }))
-
-    const sortedFiles = sortFilesNaturally([...markdownFiles])
-    const duplicates: string[] = []
-    let imported = 0
-
-    for (const file of sortedFiles) {
-      try {
-        const text = await file.text()
-        const design = parseTeachingDesign(file.name, text)
-
-        const existingIndex = book.value.designs.findIndex(
-          (existing) => existing.originalFilename === file.name,
-        )
-
-        if (existingIndex !== -1) {
-          duplicates.push(file.name)
-          if (strategy === 'replace') {
-            book.value.designs.splice(existingIndex, 1, design)
-          } else {
-            book.value.designs.push(design)
-          }
-        } else {
-          book.value.designs.push(design)
-        }
-
-        imported++
-      } catch (error) {
-        failed.push({
-          filename: file.name,
-          message: error instanceof Error ? error.message : '解析失败。',
-        })
-      }
-    }
-
-    if (imported > 0 && book.value.selectedId === null && book.value.designs.length > 0) {
-      book.value.selectedId = book.value.designs[0]!.id
-    }
-
-    if (imported > 0) {
-      touch()
-    }
-
-    return { imported, failed, duplicates }
-  }
-
   function selectPage(id: DesignId): void {
     book.value.selectedId = id
   }
@@ -359,8 +290,6 @@ export function useTeachingBook(bookId: string): TeachingBookStore {
     selectedDesign,
     hasDesigns,
     warningCount,
-    importFiles,
-    detectDuplicates,
     selectPage,
     moveDesign,
     removeDesign,