✨ Add support for other substitution types

- Store and display original substitution type text
- Treat "eigenverantwortliches Arbeiten" as cancellation

server/api/index.js

@@ -177,6 +177,7 @@ export async function getSubstitutions(req, res) {
       id: element.id,
       class: element.class,
       type: element.type,
+      rawType: element.rawType,
       lesson: element.lesson,
       date: new Date(element.date).getTime(),
       notes: element.notes,