## 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#122740
Forward-Port-Of: odoo/enterprise#120740

Steps to reproduce
1. Create two customer invoices that share the same VAT tax, with a payment term granting an early payment discount.
2. Create one bank statement line whose amount equals the sum of both invoices' discounted totals.
3. From the bank reconciliation widget, select both invoices and validate in a single batch reconciliation.
4. Open Accounting > Reporting > Tax Return, switch the variant to "Group by: Account > Tax".

Issue
The cash-discount expense row shows a Net base column equal to twice the real
discount base. The Tax column is correct.

The bank-statement reconciliation paths (set_line_bank_statement_line,
set_batch_payment_bank_statement_line, _reconcile_payments) loop over each
invoice and call _apply_early_payment_discount one invoice at a time. Each
call writes one discount base line and one discount tax line on the resulting
bank entry, so when two invoices share the same tax the bank entry ends up
with two pairs carrying the same (account, partner, currency,
tax_repartition_line_id, tax_ids).

The SQL that feeds the tax report at
https://github.com/odoo/odoo/blob/d7d0efd39a65bfb6fee307b661cd2523a6b8231d/addons/account/models/account_move_line_tax_details.py#L100
matches every base line of a tax with every tax line of that tax inside the
same move. With two pairs sharing one tax that turns two rows into four, and
SUM(base_amount) doubles. The Tax column does not double because the same SQL
redistributes each tax line's recorded amount across its matched rows so the
totals still add back to the original tax.

The payment register flow does not have this problem because it calls
_get_invoice_counterpart_amls_for_early_payment_discount once with every
invoice, and that helper already collapses duplicates with the merge key at
https://github.com/odoo/odoo/blob/f3b317310b84edb073009f7d15d7fec002f3ccf0/addons/account/models/account_move.py#L5082-L5093

opw-6199906

Forward-Port-Of: odoo/enterprise#122747
Forward-Port-Of: odoo/enterprise#117743

**Steps to Reproduce:**
1)Create a database in v19.2.
2)Install the l10n_be_hr_payroll module.
3)Open the login user's profile and set the Payroll access rights to No (null).
4)Navigate to Employees → Configuration → Working Schedules.

**Actual Result:**
A traceback is triggered after opening the record.

```python
Failed to read field resource.calendar.l10n_be_reorganisation_measure_ids
You are not allowed to access 'BE: Reorganisation Measure.'
(l10n.be.reorganisation.measure) records.

This operation is allowed for the following groups:
	- Payroll/Assistant

Contact your administrator to request access if necessary.
```

**Issue:-**
The traceback is caused by the following commit introduced in v19.2 [here](https://github.com/odoo/enterprise/commit/e1092393ff99e9dad84ea8b9d6066e0bc61d6312) In this commit, a new computed field `l10n_be_reorganisation_measure_ids` was added on `resource.calendar`. The field is computed and store=true when the read function is called, and reads the data from the database at that time; The payroll doesn't have any access rights due to the error

**Solution:**
To fix this issue, a group access check is added inside the field

Ticket:- 6245936

Issue:
When an invoice (sales journal) uses "Switzerland" localization and the invoice is issued to a customer outside Switzerland/Liechtenstein, no payment reference is generated. This causes the invoice PDF to hide payment communication and bank account details.

Other localizations like Belgian companies, uses Belgian references, the reference is always generated regardless of customer country.

Steps to reproduce:
- Configure a Swiss company with a QR IBAN bank account
- Set the sales journal Communication Standard to Switzerland
- Create and confirm an invoice for a non swiss customer (US, BE)
- Observe in the pdf and in the other info tab -> no payment reference or payment details

Cause:
`get_l10n_ch_qrr_number()` was using on `l10n_ch_is_qr_valid()`, which conflicts QR-bill printability (partner country, currency) with payment reference generation. When the customer is outside CH/LI, `l10n_ch_is_qr_valid()` is False and no QRR reference is generated.

Solution:
Decouple QRR reference generation from QR bill printability. The Swiss communication standard now generates a QRR format reference when a QR-IBAN is configured, regardless of customer's country or currency.

opw-6222417

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

Forward-Port-Of: odoo/odoo#266861

**Description of the issue/feature this PR addresses:**
When branch companies are involved, currency conversion goes through the branch instead of its root company. Because currency rates in Odoo only ever live on the root company, resolving a rate through a branch is incorrect. Furthermore, when two sibling branches are active at the same time, it makes the computed company a multi-record set, breaking the reconciliation process with an "Expected singleton" error.

This is grounded in how the rest of res.currency already behaves by design:

res.currency._get_rates() looks up rates with company_id in (False, company.root_id.id).

res.currency.rate._check_company_id() forbids setting a rate on a company that has a parent_id.

Therefore, rates are, by design, only ever meant to live on the root company. The only place that still passed the raw company (branch included) into with_company() was res.currency._get_conversion_rate().

**Current behavior before PR:**
_get_conversion_rate() forwarded the received company untouched to from_currency.with_company(company). As a result, Odoo looked up the conversion rate through the branch rather than its parent.

When more than one branch of the same parent is active at the same time (resulting in a recordset of 2+ branches), company.currency_id inside _compute_current_rate() was no longer a singleton, causing the code to crash with ValueError: Expected singleton: res.company(...) — even though every branch shares the exact same currency and rate defined on their common root company.

**Steps to reproduce:**
1) Enable multi-company and branches.
2) Create a parent company P (e.g., using ARS as main currency).
3) Create two branches under P: B1 and B2 (branches inherit P's currency).
4) On the parent company P, define a currency rate for a foreign currency, e.g., USD (Accounting > Configuration > Currencies > USD > Rates).
5) Log in with a user that has P, B1, and B2 all selected as active companies (all three checked in the top-right company switcher).
6) In branch B1, create a customer invoice in USD.
7) In branch B2, register a customer payment in USD.
8) Open the Auto-reconcile tool or try to reconcile the journal items directly.

Result: A ValueError: Expected singleton is raised during the reconciliation because the conversion rate is resolved against the multi-company recordset B1 + B2 instead of P.

**Desired behavior after PR is merged:**
_get_conversion_rate() now resolves the company to its root_id before computing the rate. Branches will correctly fallback to their parent company, and multiple active sibling branches will collapse to a single root company, ensuring that company.currency_id remains a singleton.

With the same steps described above, the invoice and the payment now reconcile normally, safely using the single USD rate defined on the parent root company. Non-branch (standalone) companies remain unaffected since a root company's root_id is itself.

**video**
https://drive.google.com/file/d/14NGTTzP28CgSiYFQdFZ6juHSsib_MDd9/view
---
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

Forward-Port-Of: odoo/odoo#273758

In a multi-company setup with a website per company, the unsubscribe link in mass mailing emails could send recipients to the login page instead of the unsubscribe confirmation page.

### Steps to reproduce

1. Enable multi-company and create a second company `Company B`.
2. Create two websites with different domains, one per company:
   - `Website A` on the main company, domain `http://website-a.test`
   - `Website B` on `Company B`, domain `http://website-b.test`
3. Set the system parameter `web.base.url` to `http://website-a.test`. System parameters are global, so this value applies to the whole database regardless of the company you switch to.
4. Create a contact and set its `Company` field to `Company B`.
5. In Email Marketing, create a mailing with recipient model `Contact`, target the contact above, pick any template with an unsubscribe link, and send it.
6. Open the email in an incognito window and click the unsubscribe link: you land on the login page instead of the unsubscribe page.

### Cause

Mass mailing builds the unsubscribe link in two steps.

First, each email body is rendered for its recipient. While rendering, relative URLs like `/unsubscribe_from_list` are turned into absolute URLs by prepending a base URL. That base URL comes from the recipient record itself: `recipient.get_base_url()`. The `website` module overrides this so that, when the record has a company, it returns that company's website domain. For a contact in `Company B`, the body ends up with `http://website-b.test/unsubscribe_from_list`.

Second, right before sending, `mail_mail._prepare_outgoing_list` replaces that placeholder URL with a per-recipient signed URL pointing to `/confirm_unsubscribe`. It does this by plain string replacement: it looks for `{base_url}/unsubscribe_from_list` in the body and swaps it. The `base_url` used here came from `self.mailing_id.get_base_url()`. A mailing has no company, so its base URL falls back to the global `web.base.url`, which in our setup is `http://website-a.test`.

The two base URLs no longer match. The body contains the website B URL, but the replacement code searches for the website A URL. The search fails, the placeholder stays in the email, and the recipient clicks a link to `/unsubscribe_from_list`. That route only redirects to `/mailing/my`, which requires being logged in, so the user lands on the login page.

### Fix

Compute the base URL from the recipient record (the same record used when rendering the body) instead of the mailing. The two URLs then agree and the replacement works. Fall back to the mailing's base URL if there is no recipient model on the mail.

opw-4914203

Forward-Port-Of: odoo/odoo#273888
Forward-Port-Of: odoo/odoo#264055

The below test sometimes fail for an incorrect reason and leads to a false 
positive:
https://github.com/odoo/odoo/blob/6dbeac3a42f46b42c638c05aea8285452c944c3f/addons/stock_dropshipping/tests/test_purchase_order.py#L21

Here is another way to reproduce the issue with a higher probability of 
false positive (and it is actually easier to read and understand what the 
test is doing and what's wrong). It needs to edit the following test:
https://github.com/odoo/odoo/blob/ec58c5e12987401659ea0d75d3be2905ad1d807d/addons/purchase_stock/tests/test_create_picking.py#L953
With the below diff:
```diff
--- a/addons/purchase_stock/tests/test_create_picking.py
+++ b/addons/purchase_stock/tests/test_create_picking.py
@@ -965,6 +965,7 @@ class TestCreatePicking(ProductVariantsCommon):
             'price': 500.0,
             'discount': 10,
         })]
+        self.product_id_1.standard_price = 1.0
         po = self.env['purchase.order'].create(self.po_vals)  # create a PO for 5 units
         po.button_confirm()
         with Form(po) as po_form:
```
It will lead to:
```
Traceback (most recent call last):
  File ".../test_create_picking.py", line 976, in test_average_cost_updated_after_po_with_discount
    self.assertEqual(self.product_id_1.standard_price, 450.0)
AssertionError: 1.0 != 450.0
```

Here are the explanations: when receiving an AVCO product, at some point, we 
recompute its standard price. To do so, among several operations, we take 
the last manual update, and we ignore all previous SM:
https://github.com/odoo/odoo/blob/2dbd88657395da965125c8f085da93e04c9c8f0a/addons/stock_account/models/product.py#L463-L465

This is an issue when things are done too quickly. See the pattern:
```py
self.product_a.standard_price = 5.0 # -> define valuation_from_date
po.confirm() # with another cost
receipt.button_validate() # -> define move.date
``` 
In case of a fast execution, both dates will be equal. We therefore ignore 
the SM and rely on the manual update to define the standard price, which is 
not expected. This explains the above `AssertionError`.

Fixing the codebase is quite tricky since the opposite use case could also
happen, aka first processing a receipt and only then modifiying the standard
price.

Tests side, a more important solution should probably be implemented to ease
their redaction and avoid this basic pattern. Yet, a WIP task is changing
the valo for Odoo 20, so the whole logic may change. Second, the current
issue is impacting a lot of builds, so we need to move forward. For both
reason, the commit only "fixes" the current test.

runbot-939955

Forward-Port-Of: odoo/odoo#273078

Fix 1 : project, sale_timesheet: remove default_allow_billable context in Create a Project
---------------------
**Issue:**
  When a project is created from the sale app, it is not billable by default, and the sale order / sale order line are not set.

**Fix:**
 Remove default_allow_billable = False in the Create a Project

**Note:**
  default_allow_billable = True already exists in action_view_project_ids, but that default context is replaced when opening the project directly from the view. This happens because default_allow_billable = False is set in the Create a Project
  action.

Fix 2: sale_project: show only relevant project templates per company
----------------
**Steps:**
   - Install sale_project
   - Create two companies (A, B)
   - Create three project templates:
	 - Template A (company A)
	 - Template B (company B)
	 - Template C (no company → visible to all)
   - Create a sale order for company A with a service product
   - Confirm the sale order
   - Create a project and try to select a template

**Issue:**
   All project templates were visible even if the sale order had a company set.

**Fix:**
   Added a filter (domain) on the project template field so only templates for the sale order’s company or templates with   no company are shown. Users cannot select templates from other companies.

task-5074893

Forward-Port-Of: odoo/odoo#260496
Forward-Port-Of: odoo/odoo#229309

### Steps to reproduce:
- Download 'Sales' and 'Timesheets' apps
- Create a service product invoiced on delivered quantities with timesheet tracking
- Create and confirm a SO for quantity 1
- Log 20h on timesheets
- Invoice the SO
- Create a credit note for 11 hours => only 9 hours are invoiced
- Log 5h more on timesheets
- Back to the SO > create invoice again
> All the 25hrs are to invoiced, although 9 of them were invoiced before

### Cause of Issue:
When generating the new invoice, `_recompute_qty_to_invoice` calls `_get_delivered_quantity_by_analytic` which retrieves the analytic values for the SO line.

The values retrieved are later used to determine the delivered quantity, which is later assigned to be `line.qty_to_invoice` without taking into account the already invoiced hours. https://github.com/odoo/odoo/blob/7a6518e39d34575a3977e7c4a0053a45223e203c/addons/sale_timesheet/models/sale_order_line.py#L176-L186

### Fix:
Ensures that hours that have already been completely invoiced are deducted from the quantity to invoice.

opw-6253650

Forward-Port-Of: odoo/odoo#273156
Forward-Port-Of: odoo/odoo#268025