**problem:**
On timesheets, the overtime indication next to an employee's name is incorrect when using flexible work schedules. for example: a "Flexible 20h" schedule (4h a day) shows 1h of negative overtime even when the employee has logged exactly 20h for the week.

**steps to reproduce:**
1. Create a new working schedule with flexible hours enabled for example (20h/week, 4h/day average)
2. Assign this schedule to an employee
3. Go to Timesheets, search for the employee
4. Navigate to a past week
5. Enter 4h on each working day
6. Observe the overtime indication shows incorrect value (-01:00)

**cause:**
In `resource/models/resource_calendar.py`, the flexible hours algorithm that determines the date range by converts UTC boundaries to the employee's timezone. When the employee's timezone has a positive UTC offset (UTC+1, like in brussels time zone), `Sun 23:59:59 UTC` becomes `Mon 00:59:59 CET`, pushing `end_date` to the next Monday. This creates an 8 day range instead of 7. The algorithm then starts a new weekly budget for the spillover day and allocates 1 extra hour, making `allocated_hours` 20.9999998 instead of 20.

**fix:**
- Use the UTC date before conversion to the employee's timezone when determining the flexible date range.
- prefer `self` when it is the flexible calendar being queried, so hr_contract's `_get_calendar_at()` override cannot substitute the contract's calendar parameters (full_time_required_hours, hours_per_day) for the flexible ones.

**note**
Updating the test (`test_no_carried_over_leaves_for_flexible_resource`) in `hr_holidays/tests/test_expiring_leaves.py` expected duration logic, is to match the corrected inclusive day range and prevent asserting the previous spillover behavior.
link to the enterprise PR: https://github.com/odoo/enterprise/pull/112879

link to the community PR: https://github.com/odoo/odoo/pull/257269

opw-5970511

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Forward-Port-Of: odoo/enterprise#112879

### Issue before this commit:
The "Source" (origin) field was missing from the PDF of replacement invoices. While the original invoice correctly displayed the Sales Order reference, the new invoice generated through the request cancel process had an empty origin field.

### Steps to reproduce the issue:
1. Download Sales and l10n_mx
2. Set a UNSPSC Category for one product
3. Go to Sales, create a new Quotation and confirm it
4. Create invoice, confirm and send & print
5. Request cancel button -> create replacement invoice
6. In the new invoice there is no source origin invoice

### Cause of the issue:
The invoice_origin field is defined with copy=False. Since the replacement logic uses the copy_data method without explicitly passing the origin value, the field was automatically cleared during the creation of the new invoice.

### Reason to introduce the fix:
To ensure document traceability, the fix explicitly passes the invoice_origin from the original invoice to the replacement. This maintains the link to the Sales Order in the database and ensures the "Source" label appears on the printed PDF.

opw-6070016

Forward-Port-Of: odoo/enterprise#114099

### Steps to reproduce:

- In the settings: Enable "Storage Locations"
- Inventory > Configuration > Warehouse Management > Operation Types
- On receipts, in the Barcode App tab enable: "Force a destination on all products"
- Open the barcode app, create a new receipt
- Scan a product > Validate
#### > You are not blocked by the fact that you did not scan any destination even just to validate the default one

### Cause of the issue:

The `barcode_validation_after_dest_location` operation type setting is not used at any point in the barcode app.

### Note:

Line in the barcode app are always created a with a `location_dest_id`: https://github.com/odoo/enterprise/blob/a220fc61d9076decdb987421df9330a1c2c20546/stock_barcode/static/src/models/barcode_picking_model.js#L1310-L1322
In particular, even if the setting says: Force a destination on all products. It should rather be interpreted as force a destination scan before validation. Note that a destination scan will not necessarily update a single line but rather all concerned lines at once: https://github.com/odoo/enterprise/blob/a220fc61d9076decdb987421df9330a1c2c20546/stock_barcode/static/src/models/barcode_picking_model.js#L1558-L1576
It is therefore a valid call to check if a location dest was scanned to determine if the a destination was set on each product before validation of the picking, even if it is just to confirm the default destination.

### Note 2:

We modify the `_get_barcode_config` to only provide a `barcode_validation_after_dest_location` if locations re enabled otherwise users enabling the option without the ability to scan locations would be soft lock and unable to validate their picking. That same logic already being applied to the `restrict_scan_dest_location` config parameter:
https://github.com/odoo/enterprise/blob/6afe02e3e836df2822d7cae8aebbd5bdde6b34cc/stock_barcode/models/stock_picking_type.py#L109

opw-6110690

Forward-Port-Of: odoo/enterprise#114429