feat: delete actions for warehouse/reservations/coupons/customers + Koja listing toggle

Delete (every manageable entity that only had "add" now has delete):
- Ingredients (warehouse): new DELETE /inventory/ingredients/{id} (soft-delete via
  the global DeletedAt filter — no FK trouble with recipes/movements) + NoOp stub +
  trash button in the materials cards.
- Reservations: new DELETE /reservations/{id} (soft-delete) + per-card delete button.
- Coupons & Customers: backend DELETE already existed; wired delete buttons in the UI.
- Shared ConfirmDialog component used by all delete flows (RTL-aware).
- Audit result: tables/branches/taxes/kitchen-stations/expenses/menu/terminals already
  had delete; HR has no "add" so no delete needed; shifts intentionally excluded
  (financial open/close records, not add-style entities).

Koja visibility:
- New Cafe.ShowOnKoja flag, default TRUE (DB default true so existing cafés stay
  listed). Discover query now filters IsVerified && !Deleted && ShowOnKoja.
- public-profile GET/PUT expose showOnKoja; dashboard public-profile panel has an
  on-by-default toggle that persists immediately. Platform IsVerified gate unchanged.
- EF migration AddCafeShowOnKoja (defaultValue: true).

Also: added the missing errors.generic i18n key (fa/en/ar) so useApiError's fallback
resolves instead of rendering the literal "errors.generic". 81 API tests pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/dashboard/src/components/reservations/reservations-screen.tsx

@@ -4,7 +4,11 @@ import { useState } from "react";
 import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
 import { useTranslations } from "next-intl";
 import { Link } from "@/i18n/routing";
-import { apiGet, apiPatch, apiPost } from "@/lib/api/client";
+import { Trash2 } from "lucide-react";
+import { apiDelete, apiGet, apiPatch, apiPost } from "@/lib/api/client";
+import { ConfirmDialog } from "@/components/ui/confirm-dialog";
+import { notify } from "@/lib/notify";
+import { useApiError } from "@/lib/use-api-error";
 import { useAuthStore } from "@/lib/stores/auth.store";
 import { formatNumber } from "@/lib/format";
 import { Button } from "@/components/ui/button";
@@ -45,8 +49,11 @@ const statusStyle: Record<ReservationStatus, string> = {
 
 export function ReservationsScreen() {
   const t = useTranslations("reservations");
+  const tCommon = useTranslations("common");
+  const apiError = useApiError();
   const cafeId = useAuthStore((s) => s.user?.cafeId);
   const queryClient = useQueryClient();
+  const [deleteTarget, setDeleteTarget] = useState<Reservation | null>(null);
 
   const [guestName, setGuestName] = useState("");
   const [guestPhone, setGuestPhone] = useState("09121234567");
@@ -92,6 +99,16 @@ export function ReservationsScreen() {
     onSuccess: () => queryClient.invalidateQueries({ queryKey: ["reservations", cafeId] }),
   });
 
+  const deleteReservation = useMutation({
+    mutationFn: (id: string) => apiDelete(`/api/cafes/${cafeId}/reservations/${id}`),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["reservations", cafeId] });
+      setDeleteTarget(null);
+      notify.success(t("deleted"));
+    },
+    onError: (err) => notify.error(apiError(err)),
+  });
+
   if (!cafeId) return null;
 
   const posHref = (r: Reservation) => {
@@ -245,6 +262,15 @@ export function ReservationsScreen() {
                         {t("markCompleted")}
                       </Button>
                     )}
+                    <Button
+                      size="sm"
+                      variant="ghost"
+                      className="text-red-600 hover:bg-red-50 hover:text-red-700"
+                      aria-label={tCommon("delete")}
+                      onClick={() => setDeleteTarget(r)}
+                    >
+                      <Trash2 className="size-4" />
+                    </Button>
                   </div>
                 </CardContent>
               </Card>
@@ -252,6 +278,19 @@ export function ReservationsScreen() {
           ))}
         </ul>
       )}
+
+      <ConfirmDialog
+        open={!!deleteTarget}
+        onOpenChange={(o) => {
+          if (!o) setDeleteTarget(null);
+        }}
+        title={t("deleteConfirmTitle")}
+        description={
+          deleteTarget ? t("deleteConfirmDesc", { name: deleteTarget.guestName }) : undefined
+        }
+        busy={deleteReservation.isPending}
+        onConfirm={() => deleteTarget && deleteReservation.mutate(deleteTarget.id)}
+      />
     </div>
   );
 }