Balance on journal items

This module changes how journal items are displayed in Accounting lists. It adds a Balance column to the standard journal items list, placed right after the Credit column, and shows a total at the bottom of the list labelled "Total Balance".

The same Balance column is also made visible in the grouped journal items list and in the tax audit list, so the balance is available in those views too.

• The column is optional and shown by default, so users can hide it if they prefer.
• The total is calculated automatically by Odoo from the displayed lines.
• No new menus, buttons, reports or business rules are added; only the list views of account.move.line are modified.

This is useful when reviewing journal entries, checking account activity or auditing taxes, because the balance of the filtered or grouped lines is visible directly in the list without opening each entry.