[FIX CI] improve model.feature add images
[#29324663, #30776065] Kategorie feature implemented
Anonymized example for LDAP configuration file (new style)
Cleaner LDAP auth controller for HSLU
Merge branch 'next' of github.com:zhdk/leihs into next
[FIX] can't convert nil into String
[FIX] delete category
Fixing HSLU LDAP auth.
Authentication adapter for HSLU now works in leihs 3.0
Merge branch 'next' into deploy