[Bug]: Refund amount not parsed properly when value contains comma

[pepijn-vanvlaanderen]

What happended?

Issue on the Medusa v2.8.4 with the core Stripe payment provider.

Steps to reproduce

1. Open the Refund modal on the order detail in the Admin UI
2. Enter a value, i.e. 6,95
3. The amount is changed to 6, also the succes widget show an amount of €NaN is refunded.
4. Also in the Stripe refund it is processed as a € 6 refund.

Note: in my admin I am not allowed to enter numeric values with a ., so there is also no workaround, except for doing the refund in Stripe and manually update database with refund value.

Expected behavior

I expected to have refunded the actual amount of € 6,95

Actual behavior

A refund was done of € 6

[olivermrbl]

@pepijn-vanvlaanderen, thanks for reporting. The team is looking into fixing this asap.