* use vue component for date picker
* zero out database fields even when set to 0001-xx-xx
* fix wrong datetime display + improved datepicker
* fix ts error
* zero out times
* add date-fns to dependencies
* initial UI for currency selection
* add task to purge invitation tokens
* group API contracts
* fix type import
* use auth middleware
* add currency setting support (UI)
* use group settings for format currency
* fix casing