Res partner journal items link

This module makes it easier to jump from a contact record straight to its accounting entries. On the standard contact form, a new smart button labelled "Journal items" appears in the button box at the top of the page, next to the other counters and shortcuts.

Clicking that button opens a list of journal items (the individual lines of accounting entries) filtered to show only the ones belonging to the partner currently open. The filter is applied automatically, so users do not have to search or set filters themselves.

The module touches the contact form (res.partner) and the accounting journal item list (account.move.line). It does not add any new fields, automatic calculations, checks, emails or scheduled jobs; it only adds the shortcut button and the window action behind it.

It is useful for accountants and sales or admin staff who want to review a customer's or vendor's accounting movements without leaving the contact screen.