Manufacturing teams can now view PDF work instructions directly within work orders. This makes production guidance easier to access on the shop floor and supports richer instruction formats alongside existing materials.

Description of the issue/feature this PR addresses:

Current behavior before PR:

Desired behavior after PR is merged:
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…rkorder.

Sales and invoice portal behavior was reorganized so customer-following logic now lives in the core sales and accounting areas, while website portal pieces move to the website portal sales area. The obsolete portal sale module and an overly broad email-recipient follower behavior were removed, reducing unnecessary automatic notifications and simplifying maintenance.

Task: https://www.odoo.com/web?#id=28619&view_type=form&model=project.task&action=327&menu_id=4720