新增解析列：学生手机，电话

src/main/java/com/njuzr/eaibackend/service/impl/ClassServiceImpl.java

@@ -617,7 +617,7 @@ public class ClassServiceImpl implements ClassService {
             Row headerRow = sheet.getRow(0);
             int nameCol = findColumnIndex(headerRow, "学生姓名", "姓名");
             int numberCol = findColumnIndex(headerRow, "学生学号", "学号");
-            int phoneCol = findColumnIndex(headerRow, "手机号", "手机号码", "学生电话");
+            int phoneCol = findColumnIndex(headerRow, "手机号", "手机号码", "学生电话", "学生手机");
 
             List<String> missingColumns = getMissingRequiredColumns(nameCol, numberCol, phoneCol);
             if (!missingColumns.isEmpty()) {
@@ -652,7 +652,7 @@ public class ClassServiceImpl implements ClassService {
 
             int nameCol = findColumnIndex(header, "学生姓名", "姓名");
             int numberCol = findColumnIndex(header, "学生学号", "学号");
-            int phoneCol = findColumnIndex(header, "手机号", "手机号码", "学生电话");
+            int phoneCol = findColumnIndex(header, "手机号", "手机号码", "学生电话", "学生手机");
 
             List<String> missingColumns = getMissingRequiredColumns(nameCol, numberCol, phoneCol);
             if (!missingColumns.isEmpty()) {