fix: rebuild export_template_xlsx

lib/tallty_import_export/import.rb

@@ -48,42 +48,7 @@ module TalltyImportExport
     end
 
     def export_workbook(workbook, **options)
-      # excel导出样式
-      alignment = { vertical: :center, horizontal: :center }
-      border    = { color: '969696', style: :thin }
-      title1 = workbook.styles.add_style(alignment: alignment, border: border, sz: 12, b: true)
-      title2 = workbook.styles.add_style(alignment: alignment, border: border, bg_color: '2a5caa', sz: 12, fg_color: 'fffffb')
-      title3 = workbook.styles.add_style(alignment: alignment.merge(wrap_text: true), border: border, sz: 10)
-      _sheet_name = (respond_to?(:sheet_name) ? sheet_name : nil) || options[:sheet_name]
-
-      header_obj = @headers
-
-      workbook.add_worksheet(name: _sheet_name) do |sheet|
-        index = 0
-
-        if respond_to?(:first_header)
-          row_index = Axlsx.col_ref(headers.size - 1)
-          sheet.merge_cells("A1:#{row_index}1")
-          sheet.add_row [first_header], style: title1, height: 30
-          index += 1
-        end
-
-        header_obj.header_lines.each do |header_line|
-          sheet.add_row(header_line.map(&:name), style: title2, height: 25)
-          index += 1
-        end
-
-        # 合并相同 header
-        header_obj.header_seq_to_axios.values.each do |axios_ary|
-          next unless axios_ary.count > 1
-
-          top_right = [axios_ary.map(&:first).min, axios_ary.map(&:last).min]
-          bottom_left = [axios_ary.map(&:first).max, axios_ary.map(&:last).max]
-          sheet.merge_cells(
-            Axlsx.cell_r(top_right.first, top_right.last) + ':' + Axlsx.cell_r(bottom_left.first, bottom_left.last),
-          )
-        end
-      end
+      TalltyImportExport::Export.new(@klass, @context).export_workbook(workbook, @klass.none, **options)
     end
 
     def exchange_to_ids(xlsx_file, associations, **options)