diff --git a/web/src/views/Knowledge.vue b/web/src/views/Knowledge.vue
index 3f2b202..691e579 100644
--- a/web/src/views/Knowledge.vue
+++ b/web/src/views/Knowledge.vue
@@ -2,16 +2,32 @@
 import { ref, computed, onMounted } from 'vue'
 import { ElMessage } from 'element-plus'
 import { useModelSettings } from './settings/useModelSettings'
+import { fetchKnowledgeBases, createKnowledgeBase as apiCreateKnowledgeBase, deleteKnowledgeBase as apiDeleteKnowledgeBase, fetchKnowledgeDocuments } from './knowledge/useKnowledge'
 import './knowledge/knowledge.css'
 
 // 获取已配置的模型列表
 const { models, fetchModels } = useModelSettings()
 
-// 页面加载时获取模型列表
-onMounted(() => {
+// 页面加载时获取数据
+onMounted(async () => {
   fetchModels()
+  await fetchKbList()
 })
 
+// 获取知识库列表
+const knowledgeBases = ref<any[]>([])
+const loadingKb = ref(false)
+
+const fetchKbList = async () => {
+  loadingKb.value = true
+  try {
+    const data = await fetchKnowledgeBases()
+    knowledgeBases.value = data
+  } finally {
+    loadingKb.value = false
+  }
+}
+
 // 筛选 LLM (chat) 模型
 const llmModels = computed(() => {
   return models.value.filter((m: any) => m.model_type === 'chat')
@@ -80,37 +96,6 @@ const prevStep = () => {
   }
 }
 
-// 模拟知识库数据
-const knowledgeBases = ref([
-  {
-    id: '1',
-    name: 'Product Documentation',
-    description: 'Product user manual and API docs',
-    document_count: 156,
-    chunk_count: 1248,
-    created_at: '2024-01-15T10:30:00Z',
-    status: 'ready'
-  },
-  {
-    id: '2',
-    name: 'Company Policies',
-    description: 'Internal company policies and procedures',
-    document_count: 42,
-    chunk_count: 320,
-    created_at: '2024-01-20T14:20:00Z',
-    status: 'ready'
-  },
-  {
-    id: '3',
-    name: 'Technical Wiki',
-    description: 'Engineering documentation and RFCs',
-    document_count: 89,
-    chunk_count: 756,
-    created_at: '2024-02-01T09:15:00Z',
-    status: 'processing'
-  },
-])
-
 const loading = ref(false)
 const searchQuery = ref('')
 
@@ -132,7 +117,17 @@ const createStep = ref(1)
 const showFileUploadDialog = ref(false)
 const selectedKnowledge = ref<any>(null)
 const fileFilter = ref('all') // all, parsed, parsing, failed
-const selectedFile = ref<any>(null) // 当前选中的文件
+const selectedFile = ref<any>(null) // 当前选中的文件ID
+const selectedDocument = ref<any>(null) // 当前选中的文档详情
+const knowledgeDocuments = ref<any[]>([]) // 知识库文档列表
+const loadingDocuments = ref(false)
+const fileInput = ref<HTMLInputElement | null>(null)
+const uploading = ref(false)
+const previewUrl = ref('') // 文档预览URL
+const loadingPreview = ref(false)
+const previewPage = ref(1) // 当前页码
+const previewTotalPages = ref(1) // 总页数
+
 const newKbForm = ref({
   name: '',
   description: '',
@@ -153,6 +148,11 @@ const parsingConfig = ref({
   fileSizeLimit: '5242880',
 })
 
+// Storage 配置
+const storageConfig = ref({
+  type: 'local',
+})
+
 const openCreateDialog = () => {
   createStep.value = 1
   newKbForm.value = { name: '', description: '' }
@@ -166,6 +166,7 @@ const openCreateDialog = () => {
     highRes: false,
     fileSizeLimit: '5242880',
   }
+  storageConfig.value = { type: 'local' }
   showCreateDialog.value = true
 }
 
@@ -181,23 +182,42 @@ const cancelCreate = () => {
     highRes: false,
     fileSizeLimit: '5242880',
   }
+  storageConfig.value = { type: 'local' }
   showCreateDialog.value = false
 }
 
-const createKnowledgeBase = () => {
-  knowledgeBases.value.push({
-    id: Date.now().toString(),
+const createKnowledgeBase = async () => {
+  const result = await apiCreateKnowledgeBase({
     name: newKbForm.value.name,
     description: newKbForm.value.description,
-    document_count: 0,
-    chunk_count: 0,
-    created_at: new Date().toISOString(),
-    status: 'ready'
+    llm_model_id: modelConfig.value.llmModelId,
+    embedding_model_id: modelConfig.value.embeddingModelId,
+    parsing_config: {
+      engine: parsingConfig.value.engine,
+      docling_url: parsingConfig.value.engine === 'docling' ? parsingConfig.value.doclingUrl : undefined,
+      enable_pdf: parsingConfig.value.enablePdf,
+      pandoc: parsingConfig.value.pandoc,
+    }
   })
-  newKbForm.value = { name: '', description: '' }
-  modelConfig.value = { llmModelId: '', embeddingModelId: '' }
-  showCreateDialog.value = false
-  ElMessage.success('Knowledge base created successfully')
+
+  if (result.success) {
+    await fetchKbList()
+    newKbForm.value = { name: '', description: '' }
+    modelConfig.value = { llmModelId: '', embeddingModelId: '' }
+    parsingConfig.value = {
+      enablePdf: true,
+      engine: 'markitdown',
+      doclingUrl: '',
+      pandoc: true,
+      academic: false,
+      highRes: false,
+      fileSizeLimit: '5242880',
+    }
+    showCreateDialog.value = false
+    ElMessage.success('Knowledge base created successfully')
+  } else {
+    ElMessage.error(result.message || 'Failed to create knowledge base')
+  }
 }
 
 // 编辑知识库
@@ -232,19 +252,217 @@ const cancelEdit = () => {
 }
 
 // 删除知识库
-const deleteKb = (id: string) => {
-  const index = knowledgeBases.value.findIndex(k => k.id === id)
-  if (index > -1) {
-    knowledgeBases.value.splice(index, 1)
+const deleteKb = async (id: string) => {
+  const result = await apiDeleteKnowledgeBase(id)
+  if (result.success) {
+    await fetchKbList()
     ElMessage.success('Knowledge base deleted')
+  } else {
+    ElMessage.error(result.message || 'Failed to delete knowledge base')
+  }
+}
+
+// 辅助函数：格式化文件大小
+const formatFileSize = (bytes: number) => {
+  if (!bytes) return '0 B'
+  const k = 1024
+  const sizes = ['B', 'KB', 'MB', 'GB']
+  const i = Math.floor(Math.log(bytes) / Math.log(k))
+  return parseFloat((bytes / Math.pow(k, i)).toFixed(1)) + ' ' + sizes[i]
+}
+
+// 辅助函数：格式化日期
+const formatDate = (dateStr: string) => {
+  if (!dateStr) return ''
+  const date = new Date(dateStr)
+  return date.toLocaleDateString('zh-CN')
+}
+
+// 辅助函数：获取状态图标
+const getStatusIcon = (status: string) => {
+  switch (status) {
+    case 'parsed':
+      return 'fa-solid fa-check-circle'
+    case 'parsing':
+      return 'fa-solid fa-spinner fa-spin'
+    case 'failed':
+      return 'fa-solid fa-circle-xmark'
+    default:
+      return 'fa-solid fa-clock'
   }
 }
 
 // 进入知识库（上传文档界面）
-const enterKnowledge = (kb: any) => {
+const enterKnowledge = async (kb: any) => {
   selectedKnowledge.value = kb
+  selectedFile.value = null
+  previewUrl.value = ''
+
+  // 获取文档列表
+  loadingDocuments.value = true
+  try {
+    const docs = await fetchKnowledgeDocuments(kb.id, fileFilter.value)
+    console.log('Fetched documents:', docs)
+    knowledgeDocuments.value = docs
+
+    // 自动选中第一个文档
+    if (docs && docs.length > 0) {
+      console.log('First doc:', docs[0])
+      await selectDocument(docs[0])
+    }
+  } finally {
+    loadingDocuments.value = false
+  }
+
   showFileUploadDialog.value = true
 }
+
+// 切换文件过滤标签时重新获取文档列表
+const changeFileFilter = async (filter: string) => {
+  fileFilter.value = filter
+  if (selectedKnowledge.value) {
+    loadingDocuments.value = true
+    try {
+      const docs = await fetchKnowledgeDocuments(selectedKnowledge.value.id, filter)
+      knowledgeDocuments.value = docs
+    } finally {
+      loadingDocuments.value = false
+    }
+  }
+}
+
+// 选择文档
+const selectDocument = async (doc: any) => {
+  selectedFile.value = doc.id
+  selectedDocument.value = doc
+  previewUrl.value = ''
+  previewPage.value = 1
+  previewTotalPages.value = 1
+
+  // 尝试从多个字段获取文件URL
+  const fileUrl = doc.file_url || doc.fileUrl || doc.url || doc.FileURL
+  if (fileUrl) {
+    previewUrl.value = fileUrl
+  } else if (selectedKnowledge.value && doc.status === 'parsed') {
+    // 获取文档预览
+    loadingPreview.value = true
+    try {
+      const { getDocumentPreview } = await import('./knowledge/useKnowledge')
+      const result = await getDocumentPreview(selectedKnowledge.value.id, doc.id)
+      if (result.success && result.data?.content) {
+        previewUrl.value = result.data.content
+        previewTotalPages.value = result.data.total_pages || 1
+        previewPage.value = result.data.current_page || 1
+      }
+    } catch (error) {
+      console.error('Failed to get preview:', error)
+    } finally {
+      loadingPreview.value = false
+    }
+  }
+}
+
+// 翻页
+const changePreviewPage = async (page: number) => {
+  if (!selectedKnowledge.value || !selectedFile.value || page < 1 || page > previewTotalPages.value) return
+
+  loadingPreview.value = true
+  previewPage.value = page
+  try {
+    const { getDocumentPreview } = await import('./knowledge/useKnowledge')
+    const result = await getDocumentPreview(selectedKnowledge.value.id, selectedFile.value, page)
+    if (result.success && result.data?.content) {
+      previewUrl.value = result.data.content
+      previewTotalPages.value = result.data.total_pages || 1
+      previewPage.value = result.data.current_page || page
+    }
+  } catch (error) {
+    console.error('Failed to get preview:', error)
+  } finally {
+    loadingPreview.value = false
+  }
+}
+
+// 触发文件上传
+const triggerFileUpload = () => {
+  fileInput.value?.click()
+}
+
+// 处理文件选择
+const handleFileSelect = async (event: Event) => {
+  const target = event.target as HTMLInputElement
+  const file = target.files?.[0]
+  if (!file || !selectedKnowledge.value) return
+
+  uploading.value = true
+  try {
+    const { uploadDocument } = await import('./knowledge/useKnowledge')
+    const result = await uploadDocument(selectedKnowledge.value.id, file)
+
+    if (result.success) {
+      ElMessage.success('File uploaded successfully')
+
+      // 后端返回 result.url 在顶层，result.document 里有 file_url
+      const fileUrl = result.url || result.document?.file_url
+      // 添加到文档列表
+      const newDoc = result.document || {
+        id: result.id,
+        name: file.name,
+        file_size: file.size,
+        status: 'parsing',
+        chunk_count: 0,
+        uploaded_at: new Date().toISOString(),
+        file_url: fileUrl
+      }
+      // 如果返回了file_url，添加到列表开头
+      if (fileUrl) {
+        previewUrl.value = fileUrl
+        // 设置选中的文档信息
+        selectedFile.value = result.id
+        selectedDocument.value = newDoc
+        // 添加到文档列表
+        knowledgeDocuments.value = [newDoc, ...knowledgeDocuments.value]
+      } else {
+        // 刷新文档列表
+        await changeFileFilter(fileFilter.value)
+      }
+    } else {
+      ElMessage.error(result.message || 'Failed to upload file')
+    }
+  } catch (error) {
+    ElMessage.error('Failed to upload file')
+  } finally {
+    uploading.value = false
+    // 清空 input 以便可以再次选择相同文件
+    target.value = ''
+  }
+}
+
+// 删除文档
+const deleteDocument = async (docId: string) => {
+  if (!selectedKnowledge.value) return
+
+  try {
+    const { deleteDocument: apiDeleteDocument } = await import('./knowledge/useKnowledge')
+    const result = await apiDeleteDocument(selectedKnowledge.value.id, docId)
+
+    if (result.success) {
+      ElMessage.success('Document deleted')
+      // 如果删除的是当前选中的文件，清除选中状态
+      if (selectedFile.value === docId) {
+        selectedFile.value = null
+        selectedDocument.value = null
+        previewUrl.value = ''
+      }
+      // 刷新文档列表
+      await changeFileFilter(fileFilter.value)
+    } else {
+      ElMessage.error(result.message || 'Failed to delete document')
+    }
+  } catch (error) {
+    ElMessage.error('Failed to delete document')
+  }
+}
 </script>
 
 <template>
@@ -515,7 +733,7 @@ const enterKnowledge = (kb: any) => {
             </div>
             <el-form label-position="top" class="kb-form">
               <el-form-item label="Storage Type">
-                <el-select placeholder="Select storage type" class="w-full">
+                <el-select v-model="storageConfig.type" placeholder="Select storage type" class="w-full" popper-class="dark-select-dropdown">
                   <el-option label="Local" value="local" />
                   <el-option label="MinIO" value="minio" />
                   <el-option label="S3" value="s3" />
@@ -580,8 +798,8 @@ const enterKnowledge = (kb: any) => {
     <!-- 文件上传弹窗 -->
     <el-dialog
       v-model="showFileUploadDialog"
-      :title="selectedKnowledge?.name || 'Knowledge Base'"
-      width="95vw"
+      title=" "
+      width="calc(100vw - 40px)"
       top="20px"
       :close-on-click-modal="false"
       class="kb-dialog file-upload-dialog"
@@ -593,9 +811,16 @@ const enterKnowledge = (kb: any) => {
             <i class="fa-solid fa-arrow-left"></i>
           </button>
           <h2 class="file-title">{{ selectedKnowledge?.name || 'Knowledge Base' }}</h2>
-          <button class="btn-primary">
+          <input
+            type="file"
+            ref="fileInput"
+            style="display: none"
+            accept=".pdf,.doc,.docx,.txt,.md"
+            @change="handleFileSelect"
+          />
+          <button class="btn-primary" @click="triggerFileUpload">
             <i class="fa-solid fa-upload"></i>
-            上传文档
+            Upload
           </button>
         </div>
 
@@ -604,30 +829,30 @@ const enterKnowledge = (kb: any) => {
           <div
             class="file-tab"
             :class="{ active: fileFilter === 'all' }"
-            @click="fileFilter = 'all'"
+            @click="changeFileFilter('all')"
           >
-            全部
+            All
           </div>
           <div
             class="file-tab"
             :class="{ active: fileFilter === 'parsed' }"
-            @click="fileFilter = 'parsed'"
+            @click="changeFileFilter('parsed')"
           >
-            已解析
+            Parsed
           </div>
           <div
             class="file-tab"
             :class="{ active: fileFilter === 'parsing' }"
-            @click="fileFilter = 'parsing'"
+            @click="changeFileFilter('parsing')"
           >
-            解析中
+            Parsing
           </div>
           <div
             class="file-tab"
             :class="{ active: fileFilter === 'failed' }"
-            @click="fileFilter = 'failed'"
+            @click="changeFileFilter('failed')"
           >
-            解析失败
+            Failed
           </div>
         </div>
 
@@ -635,74 +860,98 @@ const enterKnowledge = (kb: any) => {
         <div class="file-main">
           <!-- 左侧文件列表 -->
           <div class="file-list">
-            <!-- 模拟文件项 -->
+            <!-- 加载状态 -->
+            <div v-if="loadingDocuments" class="loading-state">
+              <i class="fa-solid fa-spinner fa-spin"></i>
+              <span>Loading...</span>
+            </div>
+            <!-- 无数据提示 -->
+            <div v-else-if="knowledgeDocuments.length === 0" class="empty-state">
+              <i class="fa-solid fa-folder-open"></i>
+              <span>No documents yet</span>
+            </div>
+            <!-- 文档列表 -->
             <div
+              v-else
               class="file-item"
-              :class="{ selected: selectedFile === i }"
-              v-for="i in 8"
-              :key="i"
-              @click="selectedFile = i"
+              :class="{ selected: selectedFile === doc.id }"
+              v-for="doc in knowledgeDocuments"
+              :key="doc.id"
+              @click="selectDocument(doc)"
             >
               <div class="file-item-icon">
                 <i class="fa-solid fa-file-pdf"></i>
               </div>
               <div class="file-item-info">
-                <div class="file-item-name">产品手册_v2.0.pdf</div>
+                <div class="file-item-name">{{ doc.name }}</div>
                 <div class="file-item-meta">
-                  <span>2.4 MB</span>
-                  <span>2024-01-15</span>
+                  <span>{{ formatFileSize(doc.file_size) }}</span>
+                  <span>{{ formatDate(doc.uploaded_at) }}</span>
                 </div>
               </div>
-              <div class="file-item-status success">
-                <i class="fa-solid fa-check-circle"></i>
+              <div class="file-item-status" :class="doc.status">
+                <span v-if="doc.status === 'failed'" class="status-text">Failed</span>
+                <i v-else :class="getStatusIcon(doc.status)"></i>
               </div>
             </div>
           </div>
 
           <!-- 右侧预览面板 -->
           <div class="file-preview">
+            <!-- 无选中文件时显示提示 -->
+            <div v-if="!selectedFile" class="preview-empty">
+              <i class="fa-solid fa-file-lines"></i>
+              <span>Select a document to preview</span>
+            </div>
+            <!-- 有选中文件时显示预览 -->
+            <template v-else>
             <div class="preview-header">
               <div class="preview-header-left">
                 <i class="fa-solid fa-file-pdf"></i>
-                <span class="preview-filename">产品手册_v2.0.pdf</span>
+                <span class="preview-filename">{{ selectedDocument?.name || 'Document' }}</span>
               </div>
               <div class="preview-header-info">
-                <span class="info-tag">2.4 MB</span>
-                <span class="info-tag">2024-01-15 10:30</span>
-                <span class="info-tag success">解析成功</span>
-                <span class="info-tag">156 个切片</span>
+                <span class="info-tag">{{ formatFileSize(selectedDocument?.file_size) }}</span>
+                <span class="info-tag">{{ formatDate(selectedDocument?.uploaded_at) }}</span>
+                <span class="info-tag" :class="selectedDocument?.status">{{ selectedDocument?.status === 'parsed' ? 'Parsed' : selectedDocument?.status === 'parsing' ? 'Parsing' : selectedDocument?.status === 'failed' ? 'Failed' : 'Pending' }}</span>
+                <span class="info-tag">{{ selectedDocument?.chunk_count || 0 }} chunks</span>
               </div>
             </div>
             <div class="preview-content">
               <!-- PDF文件预览 -->
               <div class="pdf-preview">
-                <iframe
-                  src="https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf"
-                  class="pdf-iframe"
-                ></iframe>
-              </div>
-              <div class="preview-pagination">
-                <button class="page-btn" disabled>
-                  <i class="fa-solid fa-chevron-left"></i>
-                </button>
-                <span class="page-info">1 / 3</span>
-                <button class="page-btn">
-                  <i class="fa-solid fa-chevron-right"></i>
-                </button>
+                <!-- 加载中状态 -->
+                <div v-if="loadingPreview" class="preview-loading">
+                  <i class="fa-solid fa-spinner fa-spin"></i>
+                  <span>Loading preview...</span>
+                </div>
+                <!-- 有预览URL时显示PDF -->
+                <embed
+                  v-else-if="previewUrl"
+                  type="application/pdf"
+                  :src="previewUrl"
+                  class="pdf-embed"
+                />
+                <!-- 无预览时显示提示 -->
+                <div v-else class="preview-no-file">
+                  <i class="fa-solid fa-file-pdf"></i>
+                  <span>Document preview not available</span>
+                </div>
               </div>
             </div>
+            </template>
             <div class="preview-actions">
-              <button class="action-btn delete">
+              <button class="action-btn delete" @click="deleteDocument(selectedFile)">
                 <i class="fa-solid fa-trash"></i>
-                删除
+                Delete
               </button>
               <button class="action-btn reparse">
                 <i class="fa-solid fa-rotate"></i>
-                重新解析
+                Reparse
               </button>
               <button class="action-btn confirm">
                 <i class="fa-solid fa-check"></i>
-                确认
+                Confirm
               </button>
             </div>
           </div>
diff --git a/web/src/views/knowledge/knowledge.css b/web/src/views/knowledge/knowledge.css
index 1207263..7c8fb9a 100644
--- a/web/src/views/knowledge/knowledge.css
+++ b/web/src/views/knowledge/knowledge.css
@@ -95,6 +95,27 @@
   border: 1px solid #374151;
 }
 
+/* 文件上传弹窗特殊样式 - 覆盖 kb-dialog */
+.file-upload-dialog.kb-dialog :deep(.el-dialog) {
+  background-color: #1f2937;
+  border-radius: 12px;
+  border: 1px solid #374151;
+}
+
+.file-upload-dialog.kb-dialog :deep(.el-dialog__header) {
+  padding: 16px 24px;
+  border-bottom: 1px solid #374151;
+}
+
+.file-upload-dialog.kb-dialog :deep(.el-dialog__title) {
+  display: none;
+}
+
+.file-upload-dialog.kb-dialog :deep(.el-dialog__body) {
+  padding: 0;
+  background-color: #0f1419;
+}
+
 .kb-dialog :deep(.el-dialog__header) {
   padding: 20px 24px;
   border-bottom: 1px solid #374151;
@@ -575,23 +596,27 @@
 
 /* 文件上传弹窗布局 */
 .file-upload-dialog .el-dialog {
-  position: absolute !important;
-  top: 8px !important;
-  left: 50% !important;
-  transform: translateX(-50%) !important;
-  margin-bottom: 8px !important;
-  max-height: calc(100vh - 16px);
+  margin: auto !important;
+  top: 20px !important;
+  bottom: 20px !important;
+  height: auto !important;
+  max-height: calc(100vh - 40px);
+  overflow: hidden;
 }
 
 .file-upload-dialog .el-dialog__body {
   padding: 0;
+  height: calc(100vh - 80px);
+  max-height: calc(100vh - 80px);
+  overflow: hidden;
 }
 
 .file-upload-layout {
   display: flex;
   flex-direction: column;
-  height: 85vh;
+  height: 100%;
   background-color: #0f1419;
+  overflow: hidden;
 }
 
 /* 顶部导航 */
@@ -669,6 +694,26 @@
   padding: 12px;
 }
 
+.loading-state,
+.empty-state {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 40px 20px;
+  color: #6b7280;
+  gap: 12px;
+}
+
+.loading-state i,
+.empty-state i {
+  font-size: 32px;
+}
+
+.empty-state i {
+  color: #4b5563;
+}
+
 .file-item {
   display: flex;
   align-items: center;
@@ -744,10 +789,41 @@
   color: #ef4444;
 }
 
+.file-item-status .status-text {
+  font-size: 12px;
+  color: #ef4444;
+}
+
 .file-item-status.parsing i {
   color: #f59e0b;
 }
 
+.file-item-delete {
+  flex-shrink: 0;
+  width: 24px;
+  height: 24px;
+  border-radius: 4px;
+  border: none;
+  background: transparent;
+  color: #6b7280;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  opacity: 0;
+  transition: all 0.2s;
+  margin-left: 4px;
+}
+
+.file-item:hover .file-item-delete {
+  opacity: 1;
+}
+
+.file-item-delete:hover {
+  background-color: rgba(239, 68, 68, 0.15);
+  color: #ef4444;
+}
+
 /* 右侧预览面板 */
 .file-preview {
   flex: 1;
@@ -756,6 +832,47 @@
   background-color: #121218;
 }
 
+.preview-empty {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  color: #6b7280;
+  gap: 12px;
+}
+
+.preview-empty i {
+  font-size: 48px;
+  color: #4b5563;
+}
+
+.preview-empty span {
+  font-size: 14px;
+}
+
+.preview-loading,
+.preview-no-file {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  color: #6b7280;
+  gap: 12px;
+}
+
+.preview-loading i,
+.preview-no-file i {
+  font-size: 48px;
+  color: #4b5563;
+}
+
+.preview-loading span,
+.preview-no-file span {
+  font-size: 14px;
+}
+
 .preview-header {
   display: flex;
   align-items: center;
@@ -817,7 +934,8 @@
   background-color: #1a1a1a;
 }
 
-.pdf-iframe {
+.pdf-iframe,
+.pdf-embed {
   width: 100%;
   height: 100%;
   border: none;
diff --git a/web/src/views/knowledge/useKnowledge.ts b/web/src/views/knowledge/useKnowledge.ts
new file mode 100644
index 0000000..e41c5c3
--- /dev/null
+++ b/web/src/views/knowledge/useKnowledge.ts
@@ -0,0 +1,200 @@
+// Knowledge Base API
+
+const API_BASE = 'http://localhost:8082'
+
+export interface KnowledgeBase {
+  id: string
+  name: string
+  description: string
+  llm_model_id: string
+  embedding_model_id: string
+  parsing_config: {
+    engine: string
+    docling_url?: string
+    enable_pdf: boolean
+    pandoc: boolean
+  }
+  status: string
+  document_count: number
+  chunk_count: number
+  created_at: string
+  updated_at: string
+}
+
+export interface KnowledgeDocument {
+  id: string
+  knowledge_base_id: string
+  name: string
+  file_key?: string
+  file_url?: string
+  file_size: number
+  status: string
+  chunk_count: number
+  uploaded_at: string
+}
+
+// 获取知识库列表
+export const fetchKnowledgeBases = async (): Promise<KnowledgeBase[]> => {
+  try {
+    const response = await fetch(`${API_BASE}/api/knowledge/list`)
+
+    if (!response.ok) {
+      console.error('Server error:', response.status)
+      return []
+    }
+
+    const text = await response.text()
+    if (!text) {
+      return []
+    }
+
+    try {
+      const data = JSON.parse(text)
+      if (data.success) {
+        return data.data || []
+      }
+      console.error('API error:', data.message)
+      return []
+    } catch (parseError) {
+      console.error('Failed to parse JSON:', text)
+      return []
+    }
+  } catch (error) {
+    console.error('Failed to fetch knowledge bases:', error)
+    return []
+  }
+}
+
+// 创建知识库
+export const createKnowledgeBase = async (params: {
+  name: string
+  description?: string
+  llm_model_id: string
+  embedding_model_id: string
+  parsing_config: {
+    engine: string
+    docling_url?: string
+    enable_pdf?: boolean
+    pandoc?: boolean
+  }
+}): Promise<{ success: boolean; id?: string; message?: string }> => {
+  try {
+    const response = await fetch(`${API_BASE}/api/knowledge/create`, {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify(params),
+    })
+
+    // Check if response is OK
+    if (!response.ok) {
+      const errorText = await response.text()
+      return { success: false, message: `Server error: ${response.status} - ${errorText}` }
+    }
+
+    const text = await response.text()
+    if (!text) {
+      return { success: false, message: 'Empty response from server' }
+    }
+
+    try {
+      const data = JSON.parse(text)
+      return data
+    } catch (parseError) {
+      console.error('Failed to parse JSON:', text)
+      return { success: false, message: `Invalid JSON response: ${text}` }
+    }
+  } catch (error) {
+    console.error('Failed to create knowledge base:', error)
+    return { success: false, message: `Network error: ${error}` }
+  }
+}
+
+// 删除知识库
+export const deleteKnowledgeBase = async (id: string): Promise<{ success: boolean; message?: string }> => {
+  try {
+    const response = await fetch(`${API_BASE}/api/knowledge/${id}`, {
+      method: 'DELETE',
+    })
+    const data = await response.json()
+    return data
+  } catch (error) {
+    console.error('Failed to delete knowledge base:', error)
+    return { success: false, message: 'Failed to delete knowledge base' }
+  }
+}
+
+// 获取知识库下的文档列表
+export const fetchKnowledgeDocuments = async (kbId: string, status?: string): Promise<KnowledgeDocument[]> => {
+  try {
+    const query = status && status !== 'all' ? `?status=${status}` : ''
+    const response = await fetch(`${API_BASE}/api/knowledge/${kbId}/documents${query}`)
+    const data = await response.json()
+    if (data.success) {
+      return data.data
+    }
+    throw new Error(data.message || 'Failed to fetch documents')
+  } catch (error) {
+    console.error('Failed to fetch documents:', error)
+    return []
+  }
+}
+
+// 上传文档到知识库
+export const uploadDocument = async (kbId: string, file: File): Promise<{ success: boolean; id?: string; url?: string; document?: KnowledgeDocument; message?: string }> => {
+  try {
+    const formData = new FormData()
+    formData.append('file', file)
+
+    const response = await fetch(`${API_BASE}/api/knowledge/${kbId}/documents`, {
+      method: 'POST',
+      body: formData,
+    })
+    const data = await response.json()
+    return data
+  } catch (error) {
+    console.error('Failed to upload document:', error)
+    return { success: false, message: 'Failed to upload document' }
+  }
+}
+
+// 删除知识库文档
+export const deleteDocument = async (kbId: string, docId: string): Promise<{ success: boolean; message?: string }> => {
+  try {
+    const response = await fetch(`${API_BASE}/api/knowledge/${kbId}/documents/${docId}`, {
+      method: 'DELETE',
+    })
+    const data = await response.json()
+    return data
+  } catch (error) {
+    console.error('Failed to delete document:', error)
+    return { success: false, message: 'Failed to delete document' }
+  }
+}
+
+// 重新解析文档
+export const reparseDocument = async (kbId: string, docId: string): Promise<{ success: boolean; message?: string }> => {
+  try {
+    const response = await fetch(`${API_BASE}/api/knowledge/${kbId}/documents/${docId}/reparse`, {
+      method: 'POST',
+    })
+    const data = await response.json()
+    return data
+  } catch (error) {
+    console.error('Failed to reparse document:', error)
+    return { success: false, message: 'Failed to reparse document' }
+  }
+}
+
+// 获取文档预览内容
+export const getDocumentPreview = async (kbId: string, docId: string, page: number = 1): Promise<{ success: boolean; data?: { total_pages: number; current_page: number; content: string }; message?: string }> => {
+  try {
+    const response = await fetch(`${API_BASE}/api/knowledge/${kbId}/documents/${docId}/preview?page=${page}`)
+    const data = await response.json()
+    return data
+  } catch (error) {
+    console.error('Failed to get document preview:', error)
+    return { success: false, message: 'Failed to get document preview' }
+  }
+}