The website sales options flow was updated so optional product prices are calculated with the right quantity and pricelist only when needed. This improves pricing accuracy in sales dialogs while keeping the underlying code aligned with the newer Odoo API.

task: https://www.odoo.com/web#id=12048&view_type=form&model=project.task&action=327&menu_id=
pad: https://pad.odoo.com/p/r.sWID4M4UazVGmZfO

This fix corrects how “read more” links work in Mail threads so users are taken to the intended content instead of the wrong place or no place. It improves message navigation and reduces confusion when reviewing longer conversations.

Description of the issue/feature this PR addresses:
- Task: https://www.odoo.com/web#id=672040&view_type=form&model=project.issue&action=609&menu_id=4720

Current behavior before PR:

Desired behavior after PR is merged:
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The product expiry feature was migrated to Odoo's newer internal framework and its files were reorganized. This should make the feature easier to maintain and evolve while preserving existing expiry-date functionality for inventory and products.

Task: https://www.odoo.com/web#id=12034&view_type=form&model=project.task&action=333&active_id=131

Pad: https://pad.odoo.com/p/r.HQZeUb6GKwxEH09i

This update tidies the internal code for selling digital products online without changing the customer-facing experience. It helps keep the module easier to maintain and supports future improvements with lower risk.

task: https://www.odoo.com/web#id=12048&view_type=form&model=project.task&action=327&menu_id=
pad: https://pad.odoo.com/p/r.sWID4M4UazVGmZfO