**Steps to reproduce:**
- Install Accounting
- In Accounting settings, activate "Intrastat"

- Create a product with Intrastat info
- Create a bill:
  * Product: [the created Intrastat product]
  * Intrastat Country: [any]
  * Intrastat Transport Mode: [any]
- Confirm the bill
- Make sure that the bill name contains a hyphen character (i.e. "-")
For example, "BILL/2026-06/0001".
Use the "Resequence" action from the bills list view if needed.

- Go to "Accounting / Reporting / Audit Reports / Intrastat Report"
- Expand the line to display the bill name

**Issue:**
The bill name is not fully displayed.
It is cropped right before the hyphen character (i.e. BILL/2026).

**Cause:**
A regex is used to retrieve the bill name from the report line name, but it is only allowing "/" character.

**Solution:**
Just allow "-" character in addition.
No other character is allowed to limit the risk of matching something that should not.

opw-6299854

Forward-Port-Of: odoo/enterprise#120979

Steps to reproduce:
---------------------------------------
1. Install Subscription Module
2. Create and Confirm SO with no recurring plan and a non-recurring product
3. Add a recurring product > Save SO > Observe the User Error
4. Now add the same recurring product through Catalog View

Observation:
---------------------------------------
No User Error raised stating
'You cannot save a sale order with recurring product and no subscription plan.'

Issue:
---------------------------------------
When you manually add a line and click 'Save', the constraint (`_constraint_subscription_plan`) is triggered and raised `UserError` https://github.com/odoo/enterprise/blob/434d88960abb5e424fdc1106fc93935d328bff78/sale_subscription/models/sale_order.py#L176-L177

When you add a product via the catalog view, it calls `_update_order_line_info` which directly creates/updates order lines, Which do not trigger the python constraint.
https://github.com/odoo/odoo/blob/ef9772bba1515bdaf5410c3af5a3e395f562d513/addons/sale/models/sale_order.py#L1926-L1933

Solution:
---------------------------------------
Two private helpers are introduced:
* `_is_exempt_from_subscription_plan_check`: single source of truth for all exempt states (draft, cancelled, upsell, and legacy upgrade orders).
* `_check_recurring_plan_mismatch`: raises a `UserError` when the order has or will have a recurring product but no subscription plan, reusing the exemption helper so both call sites stay in sync.

`_constraint_subscription_plan` is refactored to delegate to these helpers, and `_update_order_line_info` is overridden to call `_check_recurring_plan_mismatch` before the catalog update is applied, ensuring consistent validation across both entry points.

opw-6194865

Forward-Port-Of: odoo/enterprise#121886
Forward-Port-Of: odoo/enterprise#117879

## Issue
When a user sets their notification to "Handle in Odoo" (`inbox`) and a sign requested is completed, they do not receive the expected notification.

## Steps to reproduce
1. Install *Sign* (`sign`)
2. Sets the current user's notification preference to "Handle in Odoo" (`inbox`)
3. Create a sign request and send it to Marc Demo
4. As Marc Demo, sign the request
5. **The user who sent the sign request did not receive a notification to notify them that the request was signed.**

## Fix
This is a partial backport of both https://github.com/odoo/enterprise/commit/463d6a2aae536356e6dee6b902f2e881dbc4fbda (saas-18.2) and a related fix https://github.com/odoo/enterprise/commit/41395dba4fd31222f5fd9fc94a84c977cf9334f9 (19.0). Before the first commit, users would not receive inbox notification when sign requests would be completed.

## Note to reviewer
The issue only occurs in 18.0, as it is fixed by https://github.com/odoo/enterprise/commit/463d6a2aae536356e6dee6b902f2e881dbc4fbda in 18.2, but we can backport the fix from https://github.com/odoo/enterprise/commit/41395dba4fd31222f5fd9fc94a84c977cf9334f9 from 18.2 to 18.4 if desired.

opw-6251702

Forward-Port-Of: odoo/enterprise#122519
Forward-Port-Of: odoo/enterprise#120740