fix(packing): name everyone who brings a shared item

A common item brought by several members showed the first bringer's avatar
and a bare "+2". The tooltip only named the first person, and on the phone
neither the row nor the item sheet said who else brings it (discussion
#2782).

packingBringerNames lists the bringer and every contributor; the desktop
row, the phone row and the phone item sheet use it for "brought by".

client/src/components/Packing/PackingListPanelItemRow.tsx

@@ -18,6 +18,7 @@ import { PopoverItem } from './PackingPopover'
 import { POPOVER, POPOVER_CAPTION, POPOVER_DIVIDER } from './packingPopoverStyles'
 import type { TripMember } from './usePackingListPanel'
 import { NumericInput } from '../shared/NumericInput'
+import { packingBringerNames } from './packingBringers'
 
 interface ArtikelZeileProps {
   item: PackingItem
@@ -226,7 +227,7 @@ export function ArtikelZeile({ item, tripId, categories, onCategoryChange: _onCa
         </span>
       )}
       {!isPlaceholder && broughtBy && (
-        <span className="packing-row-badge" title={t('packing.broughtBy', { name: broughtBy })} aria-label={t('packing.broughtBy', { name: broughtBy })}
+        <span className="packing-row-badge" title={t('packing.broughtBy', { name: packingBringerNames(item) })} aria-label={t('packing.broughtBy', { name: packingBringerNames(item) })}
           style={{ display: 'inline-flex', alignItems: 'center', gap: 3, flexShrink: 0 }}>
           {ownerAvatar
             ? <img src={ownerAvatar} alt="" style={{ width: 20, height: 20, borderRadius: '50%', objectFit: 'cover', display: 'block' }} />