Currently, when printing the WIP report, demo data is displayed if no product or references are provided on the analytic item.

## Steps to produce:
- Install Manufacturing and Accounting
- Go to settings and Enable Analytic Accounting
- Search Analytic items and create a new Analytic Item by providing a description and amount.
- Gear Icon > print and open the WIP report

## Observed Behavior:
The report displays a product (laptop) with a demo reference.

This becomes problematic when an analytic item is tracked only with a project, as it still causes product and reference data to appear on the analytic item. This can mislead the user.

## Root cause:
After this [commit](https://github.com/odoo/odoo/commit/967ac550e38bab915180647dea6eccb2ae1b3b31), demo data values were added to the report to support report editor previews in the web studio. This helps users understand how the report will look while they are editing it.

However, although an account analytic line is defined at [1], no values for fields such as products and references are specified on the form. As a result, the template falls back to the preview values provided.

[1]-
https://github.com/odoo/odoo/blob/d66bb0d7b550b11876dbc7b9d87f5b2adc17dd74/addons/mrp_account/report/report_mrp_templates.xml#L32-L53

## Solution:
Using `data-oe-demo` instead of removing the fallback data appears to be the best approach, as it allows the report editor to continue using demo values for the report preview, as shown at [2]

**Before:**
<img width="871" height="340" alt="image" src="https://github.com/user-attachments/assets/91897dbd-65d8-4f70-8f22-ea38b42ba28d" />
**After:**
<img width="815" height="380" alt="image" src="https://github.com/user-attachments/assets/ffcf509b-f534-47a8-be1d-53a798995443" />

[2]:
https://github.com/odoo/enterprise/blob/a739c6c03c6629bad80f3fe61b1035ce156d59c6/web_studio/static/src/client_action/report_editor/report_iframe.scss#L65-L75

opw-6151563

Forward-Port-Of: odoo/odoo#262517

Importing attendees on an event that has an `after_sub` mail scheduler (the default on every event) fails with `savepoint "..." does not exist` and the import is aborted.

[`_update_mail_schedulers`](https://github.com/odoo/odoo/blob/b2f3270271f6/addons/event/models/event_registration.py#L298) runs the attendee scheduler synchronously on every registration create. The scheduler commits after each mail batch, which is fine from cron but problematic during an import: since [29460b723f49](https://github.com/odoo/odoo/commit/29460b723f49) [`load`](https://github.com/odoo/odoo/blob/b2f3270271f6/odoo/orm/models.py#L884) uses a single savepoint for the whole run, and any commit underneath releases it, so the next `ROLLBACK TO` / `RELEASE SAVEPOINT` raises `InvalidSavepointSpecification`.

When `import_file` is in context, trigger the cron like the async path already does so the mails are queued instead of running inline.

Steps to reproduce:

0. Have Contacts and Events installed
1. Events > Events, create a published event
2. Open the event, Attendees tab > Favorites > Import records
3. Upload a file with new attendees (Name, Email, no external id)
4. Click Import

=> "savepoint ... does not exist", import fails

Ticket [link](https://www.odoo.com/odoo/project.task/6124741)
opw-6124741

Forward-Port-Of: odoo/odoo#260648

Steps to produce:
---
- Install the `Accounting` module.
- Create several invoices for a portal user with different payment states (e.g., In Payment, Not Paid, Paid).
- Log in as the portal user.
- Navigate to the invoices list and attempt to sort by **Status**.

Issue:-
---
- Sorting by **Status** does not reflect the actual invoice payment status, resulting in incorrect ordering.

Root cause:
---
- At [1], the sorting field for Status is set to state, which corresponds to invoice states (Draft, Posted, Cancelled). However, the portal displays and expects sorting based on payment_state.

Fix:
---
- Update the sorting configuration to use payment_state instead of state,
  ensuring that invoices are sorted correctly according to their payment
  status on the portal.

[1]https://github.com/odoo/odoo/blob/5b85287ec4ea9f1b51e0f33402900777dfeeb725/addons/account/controllers/portal.py#L46-L52

opw-6128998
---
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

Forward-Port-Of: odoo/odoo#262976

Steps to reproduce
1. Create a company with Egypt localization, currency EGP
2. On a bank journal, set Outstanding Receipt and Outstanding Payment accounts
3. Register a customer payment so the journal dashboard shows the Payments row with a negative amount
4. Switch the user language to Arabic
5. Open the Accounting dashboard

Issue
The Payments amount renders as "LE 5,000.00-" instead of "-5,000.00 LE". formatCurrency returns the string "-5,000.00 LE". In an Arabic page the leading "-" has no intrinsic direction, so the browser attaches it to the surrounding right-to-left Arabic text and visually moves it past the symbol. Sibling rows on the same dashboard render correctly because they already wrap the amount in dir="ltr", see
https://github.com/odoo/odoo/blob/d0424f2ffcf99ee59befe288150f1643b3fa0112/addons/account/views/account_journal_dashboard_view.xml#L252

opw-6183749
---
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

Forward-Port-Of: odoo/odoo#266742

**Steps to reproduce:**
1. Install l10n_es_edi_verifactu.
2. Switch to a ES company.
3. Create a customer invoice and send it to VeriFactu.
4. Enable Developer Mode.
5. Go to Settings > Technical > Sequences & Identifiers > Sequences.
6. Search for the `Sequence Code: l10n_es_edi_verifactu` and open it.
7. Set a prefix or suffix using any alphabetical character.
8. Create a new invoice and send it to VeriFactu

**Issue:**
Traceback on sending Veri*Factu:
`ValueError: invalid literal for int() with base 10: 'F260001'`

**Cause:**
The value returned by `ir.sequence.next_by_id()` may contain alphabetical characters (due to prefix/suffix), while the field `chain_index` expects an integer. The raw sequence value was directly assigned, causing the conversion to fail.

**Fix:**
Catch the ValueError raised by int() when the sequence value contains non-numeric characters (e.g. due to a prefix/suffix). Instead of crashing, surface a user-friendly error on the document telling the user to remove the prefix/suffix from the sequence configuration.

**opw-6037528**

Forward-Port-Of: odoo/odoo#255473

Currently when user adds adds quantity in barcode using lots it leads to incorrect sale order quantities.

## Steps to replicate:
- Install Sales and Barcode (no demo data).
- Enable Lots & Serial Numbers in settings.
- Create Test Product with Tracking by Lots.
- Go to Inventory > Products>Lots & Serial Numbers and create 3 lots for the product.
- Update each lot’s on-hand quantity to 10 from the product page.
- Create and confirm a Sales Order for the product (lines: qty 3 and 2 units).
- Open the delivery in the Barcode app:
   - Scan lot 2 > increase qty to 3 using +1 button
   - Scan lot 3 > increase qty to 2 using +1 button
- Validate and go to the sale order.

## Observed Behavior:
The sale order delivered quantities are flipped and a backorder is created even though the quantity for the product is satisfied.

## Root cause:
The issue occurs because when a sales order is confirmed, the system defaults to
 using lot 1 on the delivery receipt. When a user scans lot 2, the `_processBarcode` function is triggered, which calls `_findLine` at [1] to select the appropriate line on the receipt.

As the loop in `_findLine` iterates through `pageLines` with values like: 
```
[{display_name: "Test product", quantity: 3, lot_id: { name: 'lot1' }}, 
{display_name: "Test product", quantity: 2, lot_id: { name: 'lot1' }}]
```

During the first iteration, `foundLine` is set at [2] for the line with quantity 3 . Since the subsequent if condition is not satisfied, the loop hits the continue block at [3].
On the next iteration, the line with quantity 2 causes `foundLine` to be overwritten at [2], and the continue block is executed again at [3].

This results in the line with quantity 2 being selected as the line to update at the end of the function.

When the user manually increases the quantity to 3, the line that originally required quantity 2 is updated and fulfilled.
Later, when lot 3 is scanned, the line that required quantity 3 is selected for update, and manually increasing the quantity to 2 before validating the order leads to a backorder and causes the delivered quantities to be flipped.

[1]:
https://github.com/odoo/enterprise/blob/81eaeb4b18d849c644160234def6c69013591abe/stock_barcode/static/src/models/barcode_model.js#L1335-L1337 [2]:
https://github.com/odoo/enterprise/blob/81eaeb4b18d849c644160234def6c69013591abe/stock_barcode/static/src/models/barcode_model.js#L1690-L1699 [3]:
https://github.com/odoo/enterprise/blob/81eaeb4b18d849c644160234def6c69013591abe/stock_barcode/static/src/models/barcode_model.js#L1727-L1729

## Solution:
Avoid grouping lines from different moves unless using batch transfers. This ensures that backorders are not created when the barcode lines are fulfilled.

opw-5423943

Forward-Port-Of: odoo/enterprise#117722
Forward-Port-Of: odoo/enterprise#109032

### Issue:
When the company `tax_periodicity` is set to quarterly, the generated SII invoice JSON still uses the monthly period format

According to the documentation, the options for Periodo include distinction between monthly and trimester (p224 - 225):
https://sede.agenciatributaria.gob.es/static_files/Sede/Procedimiento_ayuda/G417/FicherosSuministros/V_1_1/SII-Descripcion-ServicioWeb-v1-1_es_es.pdf

### Cause:
The invoice JSON generation does not consider the company's `tax_periodicity`

This logic was probably omitted because `account_reports` may not be installed
However, when the periodicity is configured, the generated SII document should reflect it correctly

### Steps to reproduce:
- Install `l10n_es_edi_sii` and `account_reports`
- In Settings, set `Tax Periodicity` to `Quarterly`
- In Settings, set `Tax Agency for SII` to `Agencia Tributaria Española`
- Change ES Company vat number to `ESA12345674`
- Create an invoice (Date: 01/05/2026, Customer: ES Company)
- Open the generated JSON document
- Check the Periodo value, it should be 2T in May

opw-6050587

Forward-Port-Of: odoo/odoo#264063

**Steps to reproduce:**
- Install the `l10n_gt_edi` module and switch to a `GT Company`.
- Navigate to Invoicing > Vendors > Bills.
- Create a new vendor bill.
- Observe that `GT Document Type` includes `NABN - Nota de Pago Electrónica` option.
- `Confirm` the bill.
- Click `Credit Note`, add a reason, and click `Reverse`.
- Observe the available options in the `GT Document Type` field.

**Observation:**
The `NABN - Nota de Pago Electrónica` option is not available for 
vendor credit notes (`in_refund`), even though `NABN` is a GT-specific 
credit note document type.

**Root Cause:**
At [1], `NABN` is added for vendor bills (`in_invoice`, `in_receipt`) 
instead of vendor credit notes (`in_refund`).

**Fix:**
This commit ensures users can correctly select `NABN - Nota de Pago Electrónica` 
on GT vendor credit notes.

[1]:
https://github.com/odoo/enterprise/blob/c7fa8c9c6f6830f5702fab4f6efaf3ac33f7fe72/l10n_gt_edi/models/account_move.py#L159-L160

opw-6252256

Forward-Port-Of: odoo/enterprise#118711