feat: pantry drag-to-recategorize, always-show categories, auto-categorize; fix category label + merge quantity mismatch (v0.84.0)

Pantry items can now be dragged between category sections (dnd-kit, cross-category drop only — no sortOrder column to persist within-category reorder). All 9 categories always render as sections, even empty ones, instead of only ones with items. Added an "Auto-categorize" action mirroring the shopping list's guessAisle heuristic.

Fixed: the edit dialog's category dropdown displayed the raw stored slug/"__other__" instead of its translated label (SelectValue needs a value->label render function, same pattern shopping-list-view.tsx already used elsewhere). Fixed: merge-duplicates now merges by ingredient identity alone, not identity+unit — two rows merge even with mismatched, missing, or different-unit quantities, only summing when safe to do so.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/components/pantry/pantry-item-dialog.tsx

@@ -35,6 +35,10 @@ export type PantryItem = {
 
 const OTHER_VALUE = "__other__";
 
+function categoryLabel(value: string, tShopping: (key: string) => string): string {
+  return value === OTHER_VALUE ? tShopping("aisleOther") : tShopping(`categories.${value}`);
+}
+
 export function PantryItemDialog({
   item,
   open,
@@ -115,7 +119,7 @@ export function PantryItemDialog({
             <Label>{t("categoryLabel")}</Label>
             <Select value={aisle} onValueChange={(v) => setAisle(v ?? OTHER_VALUE)}>
               <SelectTrigger>
-                <SelectValue />
+                <SelectValue>{(v: string) => categoryLabel(v, tShopping)}</SelectValue>
               </SelectTrigger>
               <SelectContent>
                 <SelectItem value={OTHER_VALUE}>{tShopping("aisleOther")}</SelectItem>