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.Infrastructure/Data/AppDbContext.cs

@@ -111,6 +111,9 @@ public class AppDbContext : DbContext
             e.Property(x => x.DiscoverProfileJson).HasMaxLength(8000);
             e.Property(x => x.DiscoverBadgesJson).HasMaxLength(2000);
             e.Property(x => x.DefaultTaxRate).HasPrecision(5, 2);
+            // Default true at the DB level so existing cafés stay listed on Koja after
+            // the column is added (EF doesn't read the C# initializer for the SQL default).
+            e.Property(x => x.ShowOnKoja).HasDefaultValue(true);
             e.HasQueryFilter(x => x.DeletedAt == null);
         });
 

src/Meezi.Infrastructure/Data/Migrations/20260602121746_AddCafeShowOnKoja.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Meezi.Infrastructure.Data.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddCafeShowOnKoja : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "ShowOnKoja",
+                table: "Cafes",
+                type: "boolean",
+                nullable: false,
+                defaultValue: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ShowOnKoja",
+                table: "Cafes");
+        }
+    }
+}

src/Meezi.Infrastructure/Data/Migrations/AppDbContextModelSnapshot.cs

@@ -360,6 +360,11 @@ namespace Meezi.Infrastructure.Data.Migrations
                         .IsRequired()
                         .HasColumnType("text");
 
+                    b.Property<bool>("ShowOnKoja")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(true);
+
                     b.Property<string>("Slug")
                         .IsRequired()
                         .HasMaxLength(100)