diff --git a/app/api/files/files-upload.ts b/app/api/files/files-upload.ts
index a55d535..ada0bf2 100644
--- a/app/api/files/files-upload.ts
+++ b/app/api/files/files-upload.ts
@@ -136,6 +136,90 @@ export async function uploadFileToBinary(file: File): Promise<ArrayBuffer> {
  * @param jwtToken JWT token
  * @returns 上传结果
  */
+/**
+ * 合同文档追加附件并合并
+ * @param documentId 合同文档ID
+ * @param files 附件文件列表
+ * @param mergeMode 合并模式：'overwrite'（覆盖原文档）或 'new'（新建文档记录）
+ * @param isReprocess 是否触发重新处理
+ * @param remark 备注
+ * @param jwtToken JWT token
+ * @returns 上传结果
+ */
+export async function appendContractAttachments(
+  documentId: number,
+  files: File[],
+  mergeMode: 'overwrite' | 'new' = 'overwrite',
+  isReprocess: boolean = true,
+  remark?: string,
+  jwtToken?: string
+): Promise<{data: FileUploadResponse; error?: never} | {data?: never; error: string; status?: number}> {
+  try {
+    console.log('【合同附件追加】开始追加附件:', { documentId, fileCount: files.length, mergeMode });
+    
+    // 创建FormData对象
+    const formData = new FormData();
+    
+    // 添加多个文件
+    files.forEach(file => {
+      formData.append('files', file);
+    });
+    
+    // 添加其他参数
+    formData.append('merge_mode', mergeMode);
+    formData.append('is_reprocess', isReprocess.toString());
+    if (remark) {
+      formData.append('remark', remark);
+    }
+    
+    // 构建请求URL
+    const uploadUrl = `${UPLOAD_URL}/contracts/${documentId}/append_attachments`;
+    console.log('【合同附件追加】准备发送请求到服务器:', uploadUrl);
+    
+    // 设置请求头
+    const headers: HeadersInit = {
+      'Accept': 'application/json'
+    };
+    
+    if (jwtToken) {
+      headers['Authorization'] = `Bearer ${jwtToken}`;
+    }
+    
+    // 发送请求
+    const response = await fetch(uploadUrl, {
+      method: 'POST',
+      headers,
+      body: formData
+    });
+    
+    console.log('【合同附件追加】服务器响应状态:', response.status);
+    
+    if (!response.ok) {
+      const errorText = await response.text();
+      console.error('【合同附件追加】服务器返回错误:', errorText);
+      return {
+        error: `服务器错误: ${response.status} ${response.statusText}`,
+        status: response.status
+      };
+    }
+    
+    const result = await response.json();
+    console.log('【合同附件追加】服务器返回结果:', result);
+    
+    if (result.success) {
+      return { data: result.result };
+    } else {
+      return { error: result.error || '附件追加失败' };
+    }
+    
+  } catch (error) {
+    console.error('【合同附件追加】上传过程中发生错误:', error);
+    return {
+      error: error instanceof Error ? error.message : '附件追加过程中发生未知错误'
+    };
+  }
+}
+
 export async function uploadDocumentToServer(
   binaryData: ArrayBuffer, 
   fileName: string, 
diff --git a/app/routes/_index.tsx b/app/routes/_index.tsx
index 7251ea0..ebd317c 100644
--- a/app/routes/_index.tsx
+++ b/app/routes/_index.tsx
@@ -30,17 +30,17 @@ export async function action({ request }: ActionFunctionArgs) {
 
 // 验证用户登录状态
 export async function loader({ request }: LoaderFunctionArgs) {
-  const { isAuthenticated, userRole } = await getUserSession(request);
+  const { isAuthenticated, userRole, userInfo } = await getUserSession(request);
 
   if (!isAuthenticated) {
     return redirect("/login");
   }
-  return Response.json({ userRole });
+  return Response.json({ userRole, userInfo });
 }
 
 export default function Index() {
   const navigate = useNavigate();
-  const { userRole } = useLoaderData<typeof loader>();
+  const { userRole, userInfo } = useLoaderData<typeof loader>();
   const [currentDateTime, setCurrentDateTime] = useState({
     date: '',
     time: ''
@@ -133,8 +133,18 @@ export default function Index() {
         <div className="user-info">
           <span className="datetime">{currentDateTime.date} {currentDateTime.time}</span>
           <div className="user">
-            <img src="/avatar.png" alt="用户头像" className="avatar" />
-            <span className="username">{userRole === 'developer' ? '系统管理员' : '普通用户'}</span>
+            {(() => {
+              const displayName = (userInfo?.nick_name || (userInfo as { nickname?: string })?.nickname || (userInfo as { name?: string })?.name || '') as string;
+              const lastChar = displayName ? displayName.charAt(displayName.length - 1) : '用';
+              return (
+                <>
+                  <div className="avatar w-10 h-10 rounded-full bg-primary text-white flex items-center justify-center">
+                    <span>{lastChar}</span>
+                  </div>
+                  <span className="username ml-2">{displayName || '未知用户'}</span>
+                </>
+              );
+            })()}
             <button
               onClick={handleLogout}
               className="logout-button"
diff --git a/app/routes/callback.tsx b/app/routes/callback.tsx
index f1dfee7..ca842ae 100644
--- a/app/routes/callback.tsx
+++ b/app/routes/callback.tsx
@@ -124,9 +124,17 @@ export async function loader({ request }: LoaderFunctionArgs) {
     const frontendJWT = JWTUtils.generateJWT(jwtUserInfo, tokenResponse.expires_in);
     console.log("前端JWT已生成");
     
-    // 更新userInfo以包含数据库ID和JWT信息
+    // 更新userInfo以包含数据库ID、JWT，并用数据库标准字段覆盖关键属性，确保 nick_name 等存在
     const enhancedUserInfo = {
-      ...userInfo.data,
+      ...userInfo.data, // 保留OAuth返回的原字段（包含 nickname 等）
+      username: savedUserData.username,
+      nick_name: savedUserData.nick_name,
+      phone_number: savedUserData.phone_number,
+      email: savedUserData.email,
+      ou_id: savedUserData.ou_id,
+      ou_name: savedUserData.ou_name,
+      status: savedUserData.status,
+      is_leader: savedUserData.is_leader,
       user_id: savedUserData.id,
       user_role: userRole,
       frontend_jwt: frontendJWT
diff --git a/app/routes/files.upload.tsx b/app/routes/files.upload.tsx
index f8e5d24..34d8a3e 100644
--- a/app/routes/files.upload.tsx
+++ b/app/routes/files.upload.tsx
@@ -16,6 +16,7 @@ import {
   getDocumentsStatus, 
   uploadFileToBinary,
   uploadDocumentToServer,
+  appendContractAttachments,
   type Document, 
   type DocumentType, 
   type FileUploadResponse,
@@ -304,6 +305,14 @@ export default function FilesUpload() {
   const [isContractType, setIsContractType] = useState<boolean>(false);
   const [contractMainFiles, setContractMainFiles] = useState<File[]>([]);
   const [contractAttachmentFiles, setContractAttachmentFiles] = useState<File[]>([]);
+  
+  // 附件追加状态
+  const [showAttachmentUpload, setShowAttachmentUpload] = useState<boolean>(false);
+  const [selectedDocumentId, setSelectedDocumentId] = useState<number | null>(null);
+  const [attachmentFiles, setAttachmentFiles] = useState<File[]>([]);
+  const [attachmentMergeMode, setAttachmentMergeMode] = useState<'overwrite' | 'new'>('overwrite');
+  const [attachmentRemark, setAttachmentRemark] = useState<string>("");
+  const [attachmentUploading, setAttachmentUploading] = useState<boolean>(false);
  
   const [uploadProgress, setUploadProgress] = useState(0);
   const [uploadSpeed, setUploadSpeed] = useState("0KB/s");
@@ -768,6 +777,93 @@ export default function FilesUpload() {
       console.error('【调试-handleContractAttachmentFilesSelected】处理合同附件选择时发生错误:', error);
     }
   };
+
+  // 处理附件追加文件选择
+  const handleAttachmentFilesSelected = (files: FileList) => {
+    try {
+      console.log('【附件追加】开始处理附件文件选择, 文件数量:', files.length);
+      
+      if (files.length > 0) {
+        // 验证文件类型，支持PDF、Word、ZIP、RAR
+        const validFiles: File[] = [];
+        let hasInvalidFiles = false;
+        
+        Array.from(files).forEach(file => {
+          const fileName = file.name.toLowerCase();
+          const isValidType = 
+            file.type === 'application/pdf' || fileName.endsWith('.pdf') ||
+            file.type === 'application/msword' || fileName.endsWith('.doc') ||
+            file.type === 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' || fileName.endsWith('.docx') ||
+            file.type === 'application/zip' || fileName.endsWith('.zip') ||
+            file.type === 'application/x-rar-compressed' || fileName.endsWith('.rar');
+            
+          if (isValidType) {
+            validFiles.push(file);
+          } else {
+            hasInvalidFiles = true;
+            console.error(`【附件追加】无效的文件类型: ${file.name}, 类型: ${file.type}`);
+          }
+        });
+        
+        if (hasInvalidFiles) {
+          messageService.error('只支持PDF、Word、ZIP、RAR格式的文件', {
+            title: '文件类型错误',
+            confirmText: '确定',
+            cancelText: '',
+          });
+        }
+        
+        if (validFiles.length > 0) {
+          setAttachmentFiles(validFiles);
+          console.log('【附件追加】有效文件数量:', validFiles.length);
+        }
+      }
+    } catch (error) {
+      console.error('【附件追加】处理文件选择时发生错误:', error);
+    }
+  };
+
+  // 处理附件追加上传
+  const handleAttachmentUpload = async () => {
+    if (!selectedDocumentId || attachmentFiles.length === 0) {
+      toastService.error('请选择文档和附件文件');
+      return;
+    }
+
+    try {
+      setAttachmentUploading(true);
+      
+      const result = await appendContractAttachments(
+        selectedDocumentId,
+        attachmentFiles,
+        attachmentMergeMode,
+        true, // isReprocess
+        attachmentRemark || undefined,
+        loaderData.userInfo?.token
+      );
+
+      if (result.error) {
+        throw new Error(result.error);
+      }
+
+      toastService.success('附件追加成功！');
+      
+      // 重置状态
+      setAttachmentFiles([]);
+      setAttachmentRemark("");
+      setShowAttachmentUpload(false);
+      setSelectedDocumentId(null);
+      
+      // 刷新文档列表
+      await filterDocuments(reviewType);
+      
+    } catch (error) {
+      console.error('【附件追加】上传失败:', error);
+      toastService.error(error instanceof Error ? error.message : '附件追加失败');
+    } finally {
+      setAttachmentUploading(false);
+    }
+  };
   
   // 检查并准备上传
   const checkAndPrepareUpload = (mainFiles: File[], attachmentFiles: File[]) => {
@@ -1676,17 +1772,32 @@ export default function FilesUpload() {
     {
       title: "操作",
       key: "operation",
-      width: "15%",
+      width: "20%",
       render: (_: unknown, record: Document) => (
-        <Button 
-          type="default" 
-          size="small" 
-          disabled={record.status !== DocumentStatus.PROCESSED}
-          icon="ri-eye-line"
-          onClick={() => handleViewFile(record)}
-        >
-          查看
-        </Button>
+        <div className="flex gap-2">
+          <Button 
+            type="default" 
+            size="small" 
+            disabled={record.status !== DocumentStatus.PROCESSED}
+            icon="ri-eye-line"
+            onClick={() => handleViewFile(record)}
+          >
+            查看
+          </Button>
+          {record.type_id === 1 && record.status === DocumentStatus.PROCESSED && (
+            <Button 
+              type="primary" 
+              size="small" 
+              icon="ri-attachment-line"
+              onClick={() => {
+                setSelectedDocumentId(record.id);
+                setShowAttachmentUpload(true);
+              }}
+            >
+              追加附件
+            </Button>
+          )}
+        </div>
       )
     }
   ];
@@ -2065,6 +2176,140 @@ export default function FilesUpload() {
           emptyText="暂无上传文件"
         />
       </Card>
+
+      {/* 附件追加模态框 */}
+      {showAttachmentUpload && (
+        <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
+          <div className="bg-white rounded-lg p-6 w-full max-w-2xl mx-4 max-h-[90vh] overflow-y-auto">
+            <div className="flex justify-between items-center mb-4">
+              <h3 className="text-lg font-semibold">追加合同附件</h3>
+              <button
+                onClick={() => {
+                  setShowAttachmentUpload(false);
+                  setSelectedDocumentId(null);
+                  setAttachmentFiles([]);
+                  setAttachmentRemark("");
+                }}
+                className="text-gray-400 hover:text-gray-600"
+              >
+                <i className="ri-close-line text-xl"></i>
+              </button>
+            </div>
+            
+            <div className="space-y-4">
+              {/* 文档信息 */}
+              <div className="bg-gray-50 p-3 rounded">
+                <p className="text-sm text-gray-600">
+                  目标文档ID: <span className="font-medium">{selectedDocumentId}</span>
+                </p>
+                <p className="text-xs text-gray-500 mt-1">
+                  支持PDF、Word、ZIP、RAR格式，ZIP/RAR内仅合并其中的PDF文件
+                </p>
+              </div>
+
+              {/* 文件上传区域 */}
+              <div>
+                <label className="block text-sm font-medium text-gray-700 mb-2">
+                  选择附件文件 <span className="text-red-500">*</span>
+                </label>
+                <UploadArea 
+                  onFilesSelected={handleAttachmentFilesSelected}
+                  multiple={true}
+                  accept=".pdf,.doc,.docx,.zip,.rar"
+                  tipText="支持PDF、Word、ZIP、RAR格式，可多选"
+                  mainText="选择附件文件"
+                  buttonText="选择文件"
+                  icon="ri-attachment-line"
+                />
+                {attachmentFiles.length > 0 && (
+                  <div className="mt-2">
+                    <p className="text-sm text-green-600 mb-2">
+                      <i className="ri-checkbox-circle-line"></i> 已选择 {attachmentFiles.length} 个文件
+                    </p>
+                    <div className="space-y-1 max-h-32 overflow-y-auto">
+                      {attachmentFiles.map((file, index) => (
+                        <div key={index} className="text-xs text-gray-600 bg-gray-50 p-2 rounded">
+                          <i className="ri-file-line mr-1"></i>
+                          {file.name} ({formatFileSize(file.size)})
+                        </div>
+                      ))}
+                    </div>
+                  </div>
+                )}
+              </div>
+
+              {/* 合并模式选择 */}
+              <div>
+                <label className="block text-sm font-medium text-gray-700 mb-2">
+                  合并模式
+                </label>
+                <div className="space-y-2">
+                  <label className="flex items-center">
+                    <input
+                      type="radio"
+                      name="mergeMode"
+                      value="overwrite"
+                      checked={attachmentMergeMode === 'overwrite'}
+                      onChange={(e) => setAttachmentMergeMode(e.target.value as 'overwrite' | 'new')}
+                      className="mr-2"
+                    />
+                    <span className="text-sm">覆盖原文档（推荐）</span>
+                  </label>
+                  <label className="flex items-center">
+                    <input
+                      type="radio"
+                      name="mergeMode"
+                      value="new"
+                      checked={attachmentMergeMode === 'new'}
+                      onChange={(e) => setAttachmentMergeMode(e.target.value as 'overwrite' | 'new')}
+                      className="mr-2"
+                    />
+                    <span className="text-sm">新建文档记录</span>
+                  </label>
+                </div>
+              </div>
+
+              {/* 备注 */}
+              <div>
+                <label className="block text-sm font-medium text-gray-700 mb-2">
+                  备注（可选）
+                </label>
+                <textarea
+                  value={attachmentRemark}
+                  onChange={(e) => setAttachmentRemark(e.target.value)}
+                  className="w-full p-2 border border-gray-300 rounded-md text-sm"
+                  rows={3}
+                  placeholder="请输入备注信息..."
+                />
+              </div>
+
+              {/* 操作按钮 */}
+              <div className="flex justify-end gap-3 pt-4 border-t">
+                <Button
+                  type="default"
+                  onClick={() => {
+                    setShowAttachmentUpload(false);
+                    setSelectedDocumentId(null);
+                    setAttachmentFiles([]);
+                    setAttachmentRemark("");
+                  }}
+                  disabled={attachmentUploading}
+                >
+                  取消
+                </Button>
+                <Button
+                  type="primary"
+                  onClick={handleAttachmentUpload}
+                  disabled={attachmentFiles.length === 0 || attachmentUploading}
+                  icon={attachmentUploading ? "ri-loader-4-line" : "ri-upload-cloud-line"}
+                >
+                  {attachmentUploading ? '上传中...' : '开始追加'}
+                </Button>
+              </div>
+            </div>
+          </div>
+        </div>
+      )}
     </div>
   );
 }