The Aged Payable report now shows payable amounts as positive values in standard text instead of negative red figures. This makes the report easier to read and better aligned with its purpose of showing outgoing payment obligations.

In the Aged Payable, amounts are all in red and in negative.
It is kind of pointless, we are in a report that specifically reports OUT payments, so all amounts should be in black, and in positive (Payable Accounts : Credit = positive).

Task-id: 2833852

Signed-off-by: Ruben Gomes <rugo@odoo.com>

This fix adds checks so mail, approvals, and sign features handle missing related records safely. It helps prevent unexpected crashes or broken workflows when referenced component data no longer exists.

* = approvals, sign

quickfix for task-2849688