Currently, an error occurs when rescheduling work orders in the Gantt view if a dependent operation has no start or end date.

**Steps to Reproduce:**
- Install the MRP module (with demo data).
- Activate "**Custom Work Order Dependencies**".
- Create a new MO for the _Drawer_ product with _SEC-ASSEM_ BoM.
- Confirm and plan the MO.
- Remove both start and end dates of any dependent operation.
- Manufacturing > Planning > Work Orders > Gantt
- Enable **Auto-Reschedule (Keep Buffer)** and reschedule the first operation (in 'Drill 1').

**Error:**
`TypeError - '>' not supported between instances of 'bool' and 'datetime.datetime'`

**Cause:**
At [1], `date_start` and `date_finished` can both be set to False because a condition that bypasses the UserError when both dates are empty (unlike earlier versions). As a result, during rescheduling, a False value is compared with a datetime, leading to a TypeError at [2].

Fix:
This commit adds a condition before date comparisons to ensure the dates are defined.

[1]: https://github.com/odoo/odoo/blob/3f256437a7e6c124affca8d5304476a67375753f/addons/mrp/models/mrp_workorder.py#L281-L284
[2]: https://github.com/odoo/enterprise/blob/ef2efe113684104032d798b5aa237c67a3bc240a/web_gantt/models/models.py#L484-L491

sentry-7377739830

Forward-Port-Of: odoo/enterprise#112729

### Issue:
When a fiscal position defines a `foreign_vat`, tax reports generated for that country still use the company's VAT number instead

For example, with a Belgian fiscal position using `BE010203040`, the generated BE VAT report uses the company VAT instead of `010203040`

### Cause:
The report generation did not check whether there is a fiscal position with a `foreign_vat` matching the country of the report

### Note:
The example above uses a Belgian fiscal position to reproduce the issue

Starting from 19.0, this specific flow is blocked because Intervat is enabled in production mode by default

A related fix makes the Intervat settings available in that case
Until then, the issue can be reproduced by temporarily commenting out: https://github.com/odoo/enterprise/blob/5fb58a9b7b3ae89f87e84d4ba1fa3a16237d80ac/l10n_be_intervat/models/account_return.py#L15

### Steps to reproduce:
- Disable demo data and install `accountant`
- Create a Fiscal Position "Belgium" (Country: Belgium, Foreign Tax ID: BE010203040)
- Click the alert to install the Belgian taxes
- Create and confirm an invoice for a Belgian customer:
  - Fiscal Position: Belgium
  - Any product with a Belgian tax
  - Invoice Date: 01/01/2026
- Open the Tax Report and select `VAT Return (BE)` for January
- Click `Returns` and select the full year
- Mark the December return as Completed from the three-dot menu
- Review January and fill the missing company data (TIN: 1111111, phone and email)
- Click `Validate -> Lock -> Submit`

### Before the fix:
The generated XML uses the company VAT number (`1111111`) instead of the fiscal position foreign VAT (`010203040`).

opw-6076540

Forward-Port-Of: odoo/enterprise#112610

Before:
When a document template is signed using "Sign Now" on behalf of another user,
the certificate should show the line “Connected as ” for internal and portal
users. Previously, the Email verification note under Participants could appear
even when no email verification was actually done, for example when using
"Sign Now".
Additionally, the signature confirmation email did not clearly reflect when the
document was signed locally on behalf of others.

After:
When a document is signed using Sign Now on behalf of another user, the
certificate now shows the line "Connected as <LoggedUser>" for all users.
The Email verification note under Participants is shown only when email
verification actually happens Otherwise show  `Document was signed locally for
all signers using UserName's account`
- The signature confirmation mail is updated for local sign cases
 `..., while connected as <LoggedUser>`.

Impact:
- Clearly shows in the certificate when a document is signed by user for
  another user.
- Avoids showing Email verification information when it did not happen and
  displays the correct message instead.
- Improves clarity and accuracy of signature confirmation emails.

taskid-5343749

### Steps to reproduce:
	- Install project_timesheet_forecast module
	- Configure your database to have a far timezone (Montevideo/Uruguay in my case)
	- Create a public holiday starts from 12AM to 11:59PM with a calendar
	- Create a planning slot for a resource that overlap with the public holiday
	- Check the Timesheets / Planning analysis report
	- Group by employees > day 
	**- Check the date of the public holiday and notice there are still planned hours shown**
	- Remove the calendar from the public holidays that we created previously
	- Check the report once again 
	**- Notice the day of the public holiday and the day after has no planned hours**

### Cause:
In the query we are using to exclude the leave days from the report we only exclude the ones that has calendar_id assigned, not taking into consideration that some of the public holiday are general and is not applied to just one working schedule.

Also if we have a leave starting midnight to 11:59PM since we store dates in database as UTC for timezone like Uruguay's one it will shift the end with one day which will introduce inconsistencies

### Fix:
We check if the calendar_id is null on the resource_calendar_leaves and make sure we take timezone of the resource into account when checking the dates of the leaves.

opw-5027070

Forward-Port-Of: odoo/enterprise#114757
Forward-Port-Of: odoo/enterprise#111846

**Steps to reproduce:**
- Install the `l10n_cz_reports` module and switch to a `CZ Company`
- Create an invoice for a customer with a VAT number, add a product, and 
  set the Transaction Code (enable it from the optional columns if needed).
- Navigate to Reporting > VIES Summary Report.
- Observe the value in the `VAT Number` column (includes country code).
- From the dropdown, export the report as XML.

**Observation:**
In the generated XML file, the `c_vat` field contains the VAT number 
including the country code (e.g., `CZ12345679`) instead of only the 
numeric part (`12345679`).

**Root cause:**
At [1], the VAT number is directly taken from the report lines without 
removing the country code.

**Fix:**
This commit ensures that the `c_vat` field contains only the VAT number without 
the country code, complying with the official VIES XML format requirements.

Ref: https://adisspr.mfcr.cz/dpr/adis/idpr_pub/epo2_info/popis_struktury_detail.faces?zkratka=DPHSHV#:~:text=Tax%20identification%20number%20of%20the%20purchaser%20(only%20the%20numeric%20part)

[1]:
https://github.com/odoo/enterprise/blob/c4f2c3442f30f5ac972dd136a3642acc5bcc6da2/l10n_cz_reports_2025/models/l10n_cz_vies_summary_handler.py#L29-L62

opw-6093259

Forward-Port-Of: odoo/enterprise#114990
Forward-Port-Of: odoo/enterprise#113083

## Overview
Accessing the Mobile Menu (QR ordering) or Self-Ordering interface crashes after installing `pos_blackbox_be` on SaaS-19.1. The interface fails to load due to a missing field in the POS data loading flow.

## Steps to Reproduce
1. Install `pos_blackbox_be`
2. Open POS  
3. Access the Mobile Menu (QR code) or Self-Ordering page  

## Current Behavior
- A traceback is raised  
- The interface does not load  

## Root Cause
The method `_load_pos_self_data_fields` returns the field:
iface_fiscal_data_module

However, from SaaS-19.1 this field was renamed to:
iot_fdm_be_id

This mismatch causes the POS self-ordering data loading to fail.

## Fix
Updated the returned field to match the new field name.

# Before
return fields + ['iface_fiscal_data_module']

# After
return fields + ['iot_fdm_be_id']

## Impact
- Restores proper loading of Mobile Menu (QR ordering)  
- Fixes Self-Ordering interface crash

opw-6044883  

## Reproduction Video
https://drive.google.com/file/d/1R5TYVIXvtts12YLF5iB4GKZirMZePoGr/view?usp=sharing

Forward-Port-Of: odoo/enterprise#114357