This update makes Odoo more efficient when recalculating stored information in the background, reducing unnecessary database checks. It also handles deleted records more safely, avoiding errors when mail messages or other records disappear during processing.

Avoid calling `exists()` on records to recompute.

This update makes online quotation templates easier to configure and improves the customer confirmation experience. Businesses can set default quote templates, present clearer payment and signature options, and let customers choose whether to save payment details when supported.

Task: https://www.odoo.com/web?#id=28824&view_type=form&model=project.task&action=333&active_id=131&menu_id=4720
Pad: https://pad.odoo.com/p/r.e953aff1c8084bbcf2953c23f1577de1

Project-related customer portal features are now built directly into the core project and timesheet apps, making customer access to tasks, project updates, and timesheets more consistent. The customer discussion area has also been moved into the portal foundation so it can be reused across more customer-facing pages, while older separate website project add-ons are removed.

Description of the issue/feature this PR addresses:

Current behavior before PR:

Desired behavior after PR is merged:


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