feat: export_association_headers use array

lib/tallty_import_export/export.rb

@@ -67,14 +67,21 @@ module TalltyImportExport
         # 是否导出详细子表
         # export_association_headers的结构，是association结合
         if respond_to?(:export_association_headers)
-          export_association_headers(**options).each do |export_association, association_headers|
-            records.each do |record|
-              association_records = record.send(:export_association)
+          records.each do |record|
+            context.record = record
+            Array(export_association_headers(**options)).each do |association_headers|
+              association_headers.with_indifferent_access!
+              association_records = record.send(association_headers[:association])
+              sheet_name = if association_headers[:sheet_name].present?
+                             association_headers[:sheet_name].respond_to?(:call) ?
+                               association_headers[:sheet_name].call(record, context) :
+                               association_headers[:sheet_name]
+                           end
               export_workbook(
                 workbook,
                 association_records,
-                sheet_name: record.try(:name),
-                export_headers: association_headers,
+                sheet_name: sheet_name || record.try(:name),
+                export_headers: association_headers[:headers],
                 **options,
               )
             end