Steps to Reproduce:
1. Install Accounting module (without Point of Sale).
2. Create a customer.
3. Create a journal entry with that customer set only at line level.
4. Post the journal entry.
5. Open the customer form.

Issue:
The Due smart button is not visible on the partner form even though an outstanding balance exists for the customer.

Note: This issue does not reproduce when Point of Sale is installed, as the POS module overrides `_compute_has_moves` with its own implementation that checks the outstanding balance directly.

Root Cause:
The `_compute_has_moves` method queries only `account.move `for partner matching. When a partner is referenced only at the account.move.line level, the partner is never picked up by this query, resulting in `has_moves = False` and the Due button remaining hidden.

Fix:
Replaced the EXISTS-based implementation with a UNION-based approach as the EXISTS implementation evaluated the query per partner row, whereas UNION processes all partners in a single batch query. Additionally extended the UNION to also include account.move.line partner matching, ensuring partners referenced only at the line level, are correctly detected and has_moves is set to True.

Result:
The Due smart button is now correctly visible for all partners with an outstanding balance, regardless of whether the partner is set at the journal entry level or only at the line level.

owp = 6243562

Forward-Port-Of: odoo/enterprise#119084

In recent versions of PyPDF, modifying a `PageObject` directly from a `PdfFileReader` instance triggers a `PageObject.replace_contents` deprecation warning. As identified in the pypdf library's architecture updates (specifically PR #3638 [^1] and PR #3669 [^2]), a reader's page is intended to be read-only. Mutating it directly (e.g., using `mergePage` or `compressContentStreams`) before attaching it to a writer can break internal object references and cause `NullObject` errors.

This commit resolves the warning by inverting the order of operations to ensure we only mutate writable objects. The fix implements the following flow:
1. Add the unmodified source page directly to the `PdfFileWriter`.
2. Retrieve the newly created, writable output page.
3. Apply `mergePage` and `compressContentStreams` exclusively to the writer's copy of the page.

[^1]: https://github.com/py-pdf/pypdf/pull/3638
[^2]: https://github.com/py-pdf/pypdf/pull/3669

Forward-Port-Of: odoo/enterprise#119694
Forward-Port-Of: odoo/enterprise#119239

Steps to reproduce
1. With a Mexican POS configured, create a POS order and sign a Global Invoice for it.
2. Open a new session and partially return the order; close the session.
3. On the original order, cancel the Global Invoice through the CFDI page.
4. Try to create a new Global Invoice for the original order.

Issue
The wizard raises "Orders <REFUND-NAME> are already sent or not eligible for CFDI."

Validating the refund auto-signs an `invoice_sent` CFDI on the refund pos.order because its parent is `global_sent`, see `_l10n_mx_edi_check_autogenerate_cfdi_refund` at https://github.com/odoo/enterprise/blob/5af8048f0b0956a024d7eaeb10600eec74bdf3ee/l10n_mx_edi_pos/models/pos_order.py#L98. Cancelling the GI only flips its own document to `ginvoice_cancel`; the refund's `invoice_sent` doc stays untouched, so the refund's computed `l10n_mx_edi_cfdi_state` stays `'sent'`. The chain check in `_l10n_mx_edi_check_orders_for_global_invoice` at https://github.com/odoo/enterprise/blob/5af8048f0b0956a024d7eaeb10600eec74bdf3ee/l10n_mx_edi_pos/models/pos_order.py#L184 then rejects the refund as already sent and the new GI cannot be created.

opw-6181136

Forward-Port-Of: odoo/enterprise#117211

This PR is one of many triggered by responses from Luxembourg auditors. See PR #113316 for a full list of these PRs.

As described in PR #117799, the \CustomerID and \SupplierID elements on \Transaction\Line elements is determined by a partner's `customer_rank` and `supplier_rank`.  This is a binary designation, one or the other.

The Luxembourg FAIA report requires that less than 30% of \Transaction\Line elements with payable accounts (class 6) can not have \SupplierID. The same applies for \Transaction\Line elements with receivable accounts (class 7) and the \CustomerID element.

TSB clarified that any partner on an receivable or payable line should be added to the Customer list or Supplier list respectively https://github.com/odoo/enterprise/pull/100749#issuecomment-3655127511. In addition, I verified that Luxembourg's analysis of four separate FAIA files (from ticket 5427296) aligns with this expectation. 

<img width="1322" height="690" alt="image" src="https://github.com/user-attachments/assets/1a82f99e-5b32-4dbb-96e1-1b25bab2629b" />

This commit adds partners to the \Supplier and \Customer lists if they have any payable or receivable lines, respectively. It also picks between the \CustomerID and \SupplierID based on a line's `account_type`. This logic is applied to `account_saft` and updates the other, country-specific SAFT reports where appropriate. 

It also retains the previous `customer_rank` and `supplier_rank` logic as a fallback for older XML reports and for accounts other than `asset_receivable` or `liability_payable`.

opw-6118024

Forward-Port-Of: odoo/enterprise#119098
Forward-Port-Of: odoo/enterprise#118714

Currently, an error will occur when user multi edits name of projects.

Steps to replicate:
- Install `documents_project` and open any project's settings using kebab menu (3 dots).
- Click new > name `Test` > open settings page and unselect `Documents` > Save.
- Click new > name `Test1` > Save.
- From the list view select `Test` and `Test1` and edit their name.

Error:
```
ValueError: Expected singleton: project.project(9, 10)
```

Cause:
- During `multi-edit`, self contains multiple project records.
- When only one of the selected projects has a documents folder (i.e. `use_documents` enabled), `self.documents_folder_id` contains that single folder, making `len(self.documents_folder_id.project_ids) == 1` to be True [1].
- The condition then proceeds to access `self.name` on the `multi-recordset`, raising singleton.

Solution:
- Avoided accessing `self.name` on a `multi-recordset` during multi-edit.
- Filtered projects individually and updated the document folders using the name in vals.

[1]: https://github.com/odoo/enterprise/blob/3c2985ca6011700c271ed14e40e08c89be822753/documents_project/models/project_project.py#L101

sentry-7452096418