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-Backend/src/bottling/bottling.controller.ts

@@ -1,6 +1,7 @@
 import {
   Body,
   Controller,
+  Delete,
   Get,
   Param,
   Patch,
@@ -51,4 +52,10 @@ export class BottlingController {
   ) {
     return this.bottlingService.update(id, dto, actor.id);
   }
+
+  @RequirePermission('bottling:delete')
+  @Delete(':id')
+  remove(@Param('id') id: string, @CurrentUser() actor: AuthenticatedUser) {
+    return this.bottlingService.remove(id, actor.id);
+  }
 }