Make admin can manage semester and publisher

New admin navigation bar

Manage semester is admin-only feature in /semester

Note: Semester name is unique and duplicated name is handled

There are 2 types of publisher: jurnal (for PI) and konferensi (for proceeding). Admin can adjust provided names here:

Search bar:

Add semester in journal draft using dropdown:

Update status with name provided by admin:

...or by custom name (if no journal/proceeding available in dropdown)

well... better UI than before