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>

src/Meezi.API/Services/InventoryService.cs

@@ -89,6 +89,7 @@ public interface IInventoryService
     Task<IReadOnlyList<IngredientDto>> LowStockAsync(string cafeId, CancellationToken ct = default);
     Task<IngredientDto?> CreateAsync(string cafeId, CreateIngredientRequest request, CancellationToken ct = default);
     Task<IngredientDto?> UpdateAsync(string cafeId, string ingredientId, UpdateIngredientRequest request, CancellationToken ct = default);
+    Task<bool> DeleteAsync(string cafeId, string ingredientId, CancellationToken ct = default);
     Task<IngredientDto?> AdjustAsync(
         string cafeId,
         string ingredientId,
@@ -205,6 +206,18 @@ public class InventoryService : IInventoryService
         return ToDto(entity);
     }
 
+    public async Task<bool> DeleteAsync(string cafeId, string ingredientId, CancellationToken ct = default)
+    {
+        var entity = await _db.Ingredients.FirstOrDefaultAsync(i => i.Id == ingredientId && i.CafeId == cafeId, ct);
+        if (entity is null) return false;
+
+        // Soft delete: Ingredient has a global DeletedAt query filter, so it (and its
+        // recipe lines / stock movements) drop out of every query without FK trouble.
+        entity.DeletedAt = DateTime.UtcNow;
+        await _db.SaveChangesAsync(ct);
+        return true;
+    }
+
     public async Task<IngredientDto?> AdjustAsync(
         string cafeId,
         string ingredientId,

src/Meezi.API/Services/ReservationService.cs

@@ -24,6 +24,11 @@ public interface IReservationService
         string reservationId,
         ReservationStatus status,
         CancellationToken cancellationToken = default);
+
+    Task<bool> DeleteAsync(
+        string cafeId,
+        string reservationId,
+        CancellationToken cancellationToken = default);
 }
 
 public class ReservationService : IReservationService
@@ -118,6 +123,25 @@ public class ReservationService : IReservationService
         return Map(entity);
     }
 
+    public async Task<bool> DeleteAsync(
+        string cafeId,
+        string reservationId,
+        CancellationToken cancellationToken = default)
+    {
+        var entity = await _db.TableReservations
+            .FirstOrDefaultAsync(r => r.Id == reservationId && r.CafeId == cafeId, cancellationToken);
+        if (entity is null) return false;
+
+        // Soft delete: TableReservation has a global DeletedAt query filter.
+        entity.DeletedAt = DateTime.UtcNow;
+        await _db.SaveChangesAsync(cancellationToken);
+
+        if (!string.IsNullOrEmpty(entity.TableId))
+            await _kdsNotifier.NotifyTableStatusChangedAsync(cafeId, cancellationToken);
+
+        return true;
+    }
+
     internal static ReservationDto Map(TableReservation r) => new(
         r.Id,
         r.CafeId,

src/Meezi.API/Services/ReviewService.cs

@@ -62,7 +62,7 @@ public class ReviewService : IReviewService
         DiscoverFilterParams filters,
         CancellationToken cancellationToken = default)
     {
-        var query = _db.Cafes.Where(c => c.IsVerified && c.DeletedAt == null);
+        var query = _db.Cafes.Where(c => c.IsVerified && c.DeletedAt == null && c.ShowOnKoja);
 
         if (!string.IsNullOrWhiteSpace(filters.City))
             query = query.Where(c => c.City != null && c.City.Contains(filters.City));