Sales-related modules now use the updated invoicing process consistently, reducing duplicated invoice logic across commissions, subscriptions, intrastat, loyalty, and TaxCloud flows. This should make invoice creation more reliable when advance payments or related sales features are involved.

Community PR: https://github.com/odoo/odoo/pull/98600
Upgrade PR: https://github.com/odoo/upgrade/pull/3799

Task-2959699

Loyalty, coupon, gift card, and eWallet flows were made easier to use and understand across sales and eCommerce. Customers get clearer promo code entry and order-line details, while staff benefit from simpler program menus, clearer messages, and more reliable coupon code creation.

This commit improves some messages and usability for loyalty and its
submodules:
 - Coupons should not be restricted to the partner assigned to them
   anymore
 - Merged "I have a promo code" and "Use a gift card" into a single
   toggle
 - Boolean fields have been added to each app to disable them where we
   don't want them.
 - Reduced the size of coupon codes
   This means that we increase the risk of collision which should be
   handled by the model as well now.
   Creating a coupon with an existing code will retry the creation (up
   to 10 times) until the coupon is indeed created.
 - Make it clearer in the coupon generation wizard that an email will be
   sent to the customer.
 - Reintroduce coupon/gift card details on sale order lines in eCommerce
   which was wrongfully removed.
 - Remove the "on product with taxes: " message on order lines when
   the amount is not split between taxes or if the tax message would be
   empty.
 - Make it possible for some error messages to be displayed as warning
   instead of errors
 - Split program types in two menuitems, one for promotions discount
   loyalty etc and one for gift cards and ewallet, the latter has
   simplified views.
 - Views overall have been reviewed to make it easier to understand how
   to programs work. New program types have also been added.

See https://github.com/odoo/odoo/pull/99023

TaskId-2951413

Planning schedule bars now calculate workload using each scheduled item’s total allocated hours for the selected period. This makes resource planning views more accurate and easier for managers to interpret when reviewing capacity.

replaced by https://github.com/odoo/enterprise/pull/31032

Portal visitors who view Knowledge content now have a clear button or link to start an Odoo trial with Knowledge preselected. Tracking parameters are included so the business can measure how many leads this promotion generates.

Purpose
=======
Encourages portal users that find Knowledge pretty cool
to use it themselves in their own companies.

Specifications
==============
Whether portal users are logged in or not, if they are
interested in Knowledge, this commits provides a front-end
way (button or link) to redirect them on the Odoo trial form
with the Knowledge app already selected.

UTMs are added to the link to keep track of how many leads
it generates.

Task-2936725

Subscriptions now show an error when a subscription product has no pricing configured, preventing sales or renewals from moving forward with incomplete price information. This helps teams catch setup issues earlier and avoid incorrect or unclear subscription orders.

Raise error when a subscription product has no pricing.

related : https://github.com/odoo/upgrade/pull/3537

taskid-2834336

Businesses can now choose to invoice subscriptions at the end of the billing period instead of only at the start. This supports delivery-based subscription products where the final invoice should reflect what was actually delivered rather than what was initially ordered.

This commit introduce the possibility to invoice subscriptions
at the end of the period instead of at the start.

This is especially helpful for product which are invoiced based
on delivery and not ordered quantity.

This update aligns Helpdesk and Subscription email templates with the improved customer rating process. It also makes Helpdesk demo data more complete and adjusts specialized views so the right rating experience is shown more reliably.

Payroll payslip, payslip batch, and related holiday payroll screens have been converted to Odoo's newer interface framework. This should make these payroll views more consistent with the rest of the system and easier to maintain, with limited visible process changes for users.

Converts the hr_payroll_payslip_tree list view to owl.
Converts the hr_payslip_run_tree list view to owl.
Converts the hr_payslip_form form view to owl.

task-2954753

Knowledge users can now send unwanted articles to a trash area instead of permanently losing them immediately. Trashed or archived articles are clearly labeled, can be restored, and followers receive a single email notification when relevant articles are moved to trash.

Purpose
=======

Allow users to get rid of articles they do not need anymore while adding a
safeguard against irreversible deletions.

Specifications
============

In the kebab menu, replace the Archive action by a "Send to Trash" button

This new action does the following:
-> It archives the articles
-> It gives them a "deletion date" of NOW+30days

Add a discrete Trash button in the end of the side panel of home view.
=> It sends to a list view of trashed articles
(the filter can also be available by default in the search view)

When a trashed article is opened, add a ribbon at the top of the form view that
says so + allows to reverse this operation

Removing article from trash make it root article to ensure the article will be
displayed in the sidebar (in case its old parent is still archived).

To allow other users to react to this, we will notify them when an article they
follow is moved to the trash bin using a simple notification by email using
the new email template layout as for assignations, ...)

Note: Only one mail is send per user even if multiple articles are sent to
trashed.

Task-2850521

Users can now create personal copies of restricted Knowledge articles in their Private section, keeping only the main article content and appearance. Administrators also gain a list-view duplication action that can copy full article structures, including children and members, while avoiding duplicate copies of nested articles.

Purpose:
========
1. Allow users to create their own copies of restricted articles.
2. Allow admins to duplicate articles and their structure (children, members, ...)

Specs:
======
1. Rename "duplicate" action in the kebab menu to "Create a copy".
This action creates a copy of an article in the user's Private section.
It does not copy the child articles, members,...
Only the name, body, cover and icon.

2. Add a "duplicate" action in the additional actions of the list view for admin
users only.
Since an admin could select multiple articles in the list view, one skips the
duplication of articles that are going to be duplicated during the duplication
of one of their parent, so that one does not duplicate several times the same
article with one click on the "duplicate" action.

Planning users can now generate calendar events directly from selected shifts in the list view. This saves manual scheduling work and prevents duplicate events by skipping shifts that already have a linked calendar event.

This commit adds a button to generate the shifts automatically convert the shifts
selected by the user in the list view into calendar events.
Each shift selected by the user will generate only one calendar event, if one shift
has already generated a calendar event than this shift is not taken into account
during the generation of the calendar events.

task-2857858