修改csvtool header

tool/csv_tool.py

@@ -25,6 +25,40 @@ class CSVTool:
                 writer = csv.writer(f)
                 writer.writerow(self.headers)
 
+            # 文件存在，检查是否为空或只有空行
+        try:
+            with open(self.csv_file_name, 'r', encoding='utf-8') as f:
+                content = f.read()
+
+            # 如果文件内容为空或只包含空白字符（空格、换行符等）
+            if not content.strip():
+                with open(self.csv_file_name, 'w', encoding='utf-8', newline='') as f:
+                    writer = csv.writer(f)
+                    writer.writerow(self.headers)
+                return
+
+            # 文件有内容，检查第一行是否为表头
+            with open(self.csv_file_name, 'r', encoding='utf-8') as f:
+                reader = csv.reader(f)
+                first_row = next(reader, None)
+
+            # 如果第一行不是预期的表头，则重新写入表头和原有内容
+            if first_row != self.headers:
+                lines = content.strip().split('\n')
+                # 过滤掉空行和只包含空白字符的行
+                non_empty_lines = [line for line in lines if line.strip()]
+
+                with open(self.csv_file_name, 'w', encoding='utf-8', newline='') as f:
+                    writer = csv.writer(f)
+                    writer.writerow(self.headers)
+                    # 如果有非空内容，则写入
+                    if non_empty_lines:
+                        f.write('\n'.join(non_empty_lines) + '\n')
+
+        except Exception as e:
+            print(f"检查/更新表头时出错: {e}")
+
+
     def get_existing_data(self, unique_titles: List[str]) -> set:
         """
         读取现有数据，用于去重检查