* Add new attribute `iban_valid` to `Member`.
* Submit pages of regular expenses and activity expenses now include an overview which people with expenses have a valid IBAN.
* Add a note that IBAN validity should be checked manually before submitting.
Right now, no technical barriers are in place that prevent missing/wrong IBANs when a statement is submitted. This is intentional to preserve maximal flexibility.
In a follow-up PR, one could add custom warning messages on top of page when some IBANs are invalid.
Reviewed-on: #104
Reviewed-by: Christian Merten <christian@merten.dev>
Co-authored-by: marius.klein <marius.klein@alpenverein-heidelberg.de>
Co-committed-by: marius.klein <marius.klein@alpenverein-heidelberg.de>
Use the new `allowance_to` and `subsidy_to` fields in statement validation. The
night and travel costs have to be transferred to the person listed as `subsidy_to`,
the allowance has to be paid to the persons listed in `allowance_to`.