*: stock_barcode_mrp, stock_barcode_picking_batch

## Issue Before This PR:
When navigating from the Barcode client action
(e.g. picking, inventory, etc.) to related form views
(such as lot, product, or company), the breadcrumb
would sometimes display an unnamed entry instead
of the originating document name.
This caused confusion for users, as they could not
easily identify which document they were coming from
when navigating to related records from the Barcode interface.

## Steps to Reproduce:
- Install the Barcode module.
- Open the Barcode app and navigate to:
     - Delivery Orders.
     - Manufacturing Orders
     - Batch Pickings
     - Inventory Count
- From any of these open a record
  (e.g. picking, MO, batch, inventory line)
- Click on document name or edit button on the line.
- Click on an external link (e.g. product, lot, company).
- Observe that the breadcrumb shows an unnamed entry.

## Cause of the Issue:
- When switching views inside the Barcode client action,
  the FormController calls `setDisplayName(this.displayName())`.
  In some cases, this returns an empty string, overwriting the
  previously set breadcrumb name.
- In several form views, the `display_name` field was not present,
  preventing the controller from retrieving a proper name.

## With This PR:
The Barcode views now display the correct document names in the
breadcrumb when navigating to external links, allowing users to easily
identify the originating document when opening related records from
the Barcode app.

TaskID: 4978997

Forward-Port-Of: odoo/enterprise#99165