update

app/Exports/CommonExport.php

@@ -292,6 +292,16 @@ class CommonExport implements FromCollection, WithStyles, WithColumnWidths, With
                 $endCol = $this->getColumnLetter($index + count(self::USERS_SUB_COLUMNS) - 1);
                 $sheet->mergeCells("{$startCol}1:{$endCol}1");
                 $sheet->setCellValue("{$startCol}1", $label);
+                
+                // 确保第二行表头正确设置所有子列（包括缺失的列）
+                $subIndex = 0;
+                foreach (self::USERS_SUB_COLUMNS as $subField => $subLabel) {
+                    $col = $this->getColumnLetter($index + $subIndex);
+                    // 直接设置第二行表头，确保所有列都有值
+                    $sheet->setCellValue("{$col}2", $subLabel);
+                    $subIndex++;
+                }
+                
                 $index += count(self::USERS_SUB_COLUMNS);
             } elseif (str_contains($field, 'project_users')) {
                 // 项目经理信息列：合并第一行的多个单元格
@@ -299,6 +309,15 @@ class CommonExport implements FromCollection, WithStyles, WithColumnWidths, With
                 $endCol = $this->getColumnLetter($index + count(self::PROJECT_USERS_SUB_COLUMNS) - 1);
                 $sheet->mergeCells("{$startCol}1:{$endCol}1");
                 $sheet->setCellValue("{$startCol}1", $label);
+                
+                // 确保第二行表头正确设置所有子列
+                $subIndex = 0;
+                foreach (self::PROJECT_USERS_SUB_COLUMNS as $subField => $subLabel) {
+                    $col = $this->getColumnLetter($index + $subIndex);
+                    $sheet->setCellValue("{$col}2", $subLabel);
+                    $subIndex++;
+                }
+                
                 $index += count(self::PROJECT_USERS_SUB_COLUMNS);
             } elseif (str_contains($field, 'history_courses')) {
                 // 历史课程信息列：合并第一行的多个单元格
@@ -306,6 +325,15 @@ class CommonExport implements FromCollection, WithStyles, WithColumnWidths, With
                 $endCol = $this->getColumnLetter($index + count(self::HISTORY_COURSES_SUB_COLUMNS) - 1);
                 $sheet->mergeCells("{$startCol}1:{$endCol}1");
                 $sheet->setCellValue("{$startCol}1", $label);
+                
+                // 确保第二行表头正确设置所有子列
+                $subIndex = 0;
+                foreach (self::HISTORY_COURSES_SUB_COLUMNS as $subField => $subLabel) {
+                    $col = $this->getColumnLetter($index + $subIndex);
+                    $sheet->setCellValue("{$col}2", $subLabel);
+                    $subIndex++;
+                }
+                
                 $index += count(self::HISTORY_COURSES_SUB_COLUMNS);
             } else {
                 // 其他列：合并第一行和第二行