feat(ui): raw material lots and production inputs

- Pages for raw material lots (beeswax, propolis): list, create in grams
  with optional apiary, detail with stock card (harvested / used in
  production / withdrawn / remaining) and "used in" batches.
- Production batch form takes the raw material used (lot + grams) and the
  batch page shows what it was made from - traceability both ways.
- Sidebar entry "Rohstoffe".
- Removes backend files that were committed into ApiCore-Frontend/src by
  mistake in e52a605 (copies of ApiCore-Backend/src/raw-materials).

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Frontend/src/components/stock/stock-card.spec.tsx

@@ -35,6 +35,7 @@ function stock(remaining: number): BatchStock {
       soldInShop: 30,
       withdrawn: 10,
       corrected: 0,
+      consumed: 0,
       remaining,
     },
     movements: [