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/Controllers/CafePublicProfileController.cs

@@ -57,7 +57,8 @@ public class CafePublicProfileController : CafeApiControllerBase
             gallery,
             cafe.InstagramHandle,
             cafe.WebsiteUrl,
-            ToHoursDto(hours))));
+            ToHoursDto(hours),
+            cafe.ShowOnKoja)));
     }
 
     // ── PUT (description / social / hours) ───────────────────────────────────
@@ -91,6 +92,10 @@ public class CafePublicProfileController : CafeApiControllerBase
         if (request.WorkingHours is not null)
             cafe.WorkingHoursJson = JsonSerializer.Serialize(ToHoursSchedule(request.WorkingHours), _jsonOpts);
 
+        // Koja (public discovery) listing preference
+        if (request.ShowOnKoja.HasValue)
+            cafe.ShowOnKoja = request.ShowOnKoja.Value;
+
         await _db.SaveChangesAsync(ct);
 
         var gallery = Deserialize<List<string>>(cafe.GalleryJson) ?? [];
@@ -101,7 +106,8 @@ public class CafePublicProfileController : CafeApiControllerBase
             gallery,
             cafe.InstagramHandle,
             cafe.WebsiteUrl,
-            ToHoursDto(hours))));
+            ToHoursDto(hours),
+            cafe.ShowOnKoja)));
     }
 
     // ── POST gallery/upload ───────────────────────────────────────────────────
@@ -207,13 +213,15 @@ public record UpdateCafePublicProfileRequest(
     string? Description,
     string? InstagramHandle,
     string? WebsiteUrl,
-    WorkingHoursPublicDto? WorkingHours);
+    WorkingHoursPublicDto? WorkingHours,
+    bool? ShowOnKoja = null);
 
 public record CafeProfileEditDto(
     string? Description,
     IReadOnlyList<string> GalleryUrls,
     string? InstagramHandle,
     string? WebsiteUrl,
-    WorkingHoursPublicDto? WorkingHours);
+    WorkingHoursPublicDto? WorkingHours,
+    bool ShowOnKoja);
 
 public record GalleryDto(IReadOnlyList<string> GalleryUrls);

src/Meezi.API/Controllers/InventoryController.cs

@@ -61,6 +61,19 @@ public class InventoryController : CafeApiControllerBase
         return Ok(new ApiResponse<object>(true, updated));
     }
 
+    [HttpDelete("ingredients/{ingredientId}")]
+    public async Task<IActionResult> Delete(
+        string cafeId,
+        string ingredientId,
+        ITenantContext tenant,
+        CancellationToken ct)
+    {
+        if (EnsureCafeAccess(cafeId, tenant) is { } denied) return denied;
+        var deleted = await _inventory.DeleteAsync(cafeId, ingredientId, ct);
+        if (!deleted) return NotFoundError();
+        return Ok(new ApiResponse<object>(true, new { id = ingredientId }));
+    }
+
     [HttpPost("ingredients/{ingredientId}/adjust")]
     public async Task<IActionResult> Adjust(
         string cafeId,

src/Meezi.API/Controllers/ReservationsController.cs

@@ -66,6 +66,19 @@ public class ReservationsController : CafeApiControllerBase
         if (data is null) return NotFoundError();
         return Ok(new ApiResponse<ReservationDto>(true, data));
     }
+
+    [HttpDelete("{id}")]
+    public async Task<IActionResult> Delete(
+        string cafeId,
+        string id,
+        ITenantContext tenant,
+        CancellationToken ct)
+    {
+        if (EnsureCafeAccess(cafeId, tenant) is { } denied) return denied;
+        var deleted = await _reservations.DeleteAsync(cafeId, id, ct);
+        if (!deleted) return NotFoundError();
+        return Ok(new ApiResponse<object>(true, new { id }));
+    }
 }
 
 public record UpdateReservationStatusRequest(ReservationStatus Status);