For a vault, the element page shows the name of its element group under "Element group". For vaults that name is a long description (for example "Handspring, Yamashita, round-off with or without turn in 1st and/or 2nd flight phase"), not a short group name. The Elements list (#114) already solves this by showing the number of the group for a vault ("Group 4") and the name for an element. The element page should do the same. ### What to do - Ask for `elementGroup { number }` in the `catalogItem` query (`src/lib/catalogOperations.ts`). - In `toElementDetail`/`ElementMetadataCard.tsx`, show "Group N" for a vault and the group name for an element. Use the same rule as the list (`groupLabel` in `src/lib/elementList.ts`), so the two pages always agree. ### Done when - [ ] A vault's element page shows "Group N", like the list. - [ ] An element's page still shows the name of its group. - [ ] A test covers both.