feat: make every field of a bottling batch correctable and deletable

A bottling batch could only be corrected in four of its seven fields after
creation: honey batch, jar size and jar count were frozen at creation time,
an assigned product could not be cleared again, and there was no way to
remove a record entered by mistake at all. A mistyped jar count is a
data-entry error, not a fact of production, so it has to stay correctable.

Backend:
- UpdateBottlingBatchDto now covers every field. `productId: null`
  explicitly clears the product assignment; omitting it leaves it alone.
- BottlingService.update rebalances the affected honey batch amounts:
  the previously bottled amount is given back before the corrected amount
  is taken again, so a correction never double-charges the source batch.
  Moving a batch to a different honey batch credits the old one and debits
  the new one in the same transaction.
- New DELETE /bottling-batches/:id gives the bottled amount back to the
  honey batch and keeps the full record in the audit log (action DELETE,
  beforeData). The honey batch status is deliberately left untouched - the
  status it held before being bottled is not recoverable here.
- New permission bottling:delete, checked server-side. The catalog sync
  grants it to system roles on the next boot.

Frontend:
- The edit dialog exposes all fields, offers "Kein Produkt" to clear the
  assignment, keeps a discontinued product selectable so opening the dialog
  cannot silently drop it, and shows backend errors inline.
- The form is mounted only while the dialog is open, so a cancelled edit
  never leaks its values into the next one.
- New delete button behind a confirmation that names the amount credited
  back and warns that the public origin page for the lot number stops
  resolving.
- Edit and delete are additionally hidden without the matching permission.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>

ApiCore-Frontend/src/lib/bottling/api.ts

@@ -37,3 +37,9 @@ export function updateBottlingBatch(
     body: JSON.stringify(input),
   });
 }
+
+export function deleteBottlingBatch(id: string): Promise<{ id: string }> {
+  return apiFetch<{ id: string }>(`/bottling-batches/${id}`, {
+    method: "DELETE",
+  });
+}

ApiCore-Frontend/src/lib/bottling/types.ts

@@ -24,8 +24,12 @@ export interface CreateBottlingBatchInput {
 }
 
 export interface UpdateBottlingBatchInput {
-  productId?: string;
+  honeyBatchId?: string;
+  /** `null` removes the product assignment, `undefined` leaves it untouched. */
+  productId?: string | null;
   date?: string;
+  jarSize?: number;
+  jarCount?: number;
   bestBeforeDate?: string;
   lotNumber?: string;
 }