fix: add DisplayName back to user fields (prevented removing name)

crates/core/database/src/models/users/model.rs

@@ -61,6 +61,7 @@ auto_derived!(
         StatusPresence,
         ProfileContent,
         ProfileBackground,
+        DisplayName,
     }
 
     /// User's relationship with another user (or themselves)
@@ -657,6 +658,7 @@ impl User {
                     x.background = None;
                 }
             }
+            FieldsUser::DisplayName => self.display_name = None,
         }
     }
 

crates/core/database/src/models/users/ops/mongodb.rs

@@ -326,6 +326,7 @@ impl IntoDocumentPath for FieldsUser {
             FieldsUser::ProfileContent => "profile.content",
             FieldsUser::StatusPresence => "status.presence",
             FieldsUser::StatusText => "status.text",
+            FieldsUser::DisplayName => "display_name",
         })
     }
 }