fix:udpate cell

lib/tallty_import_export/export_payload/cell.rb

@@ -44,7 +44,11 @@ class TalltyImportExport::ExportPayload::Cell
   def divise
     if @header.children.present? && @value.value
       new_cells = @header.children.map do |child_header|
-        val = @value_handler.call(@value.value, child_header.as_json.symbolize_keys, keep_array: true)
+        # 分离 header 属性，保留 proc
+        header_attrs = child_header.as_json.symbolize_keys
+        header_attrs[:proc] = child_header.proc if child_header.proc.present?
+
+        val = @value_handler.call(@value.value, header_attrs, keep_array: true)
         if (child_header.children.present? && val.is_a?(Array))
           val.map do |val|
             cell = TalltyImportExport::ExportPayload::Cell.new(
@@ -57,7 +61,11 @@ class TalltyImportExport::ExportPayload::Cell
             cell
           end
         else
-          val = @value_handler.call(@value.value, child_header.as_json.symbolize_keys)
+          # 这里也需要保留 proc
+          header_attrs = child_header.as_json.symbolize_keys
+          header_attrs[:proc] = child_header.proc if child_header.proc.present?
+          val = @value_handler.call(@value.value, header_attrs)
+
           TalltyImportExport::ExportPayload::Cell.new(
             child_header,
             TalltyImportExport::ExportPayload::Value.new(val, @value.chain),