feat(plans): menu watermark on Free (removed by paid feature)

Guest QR menu shows a "ساخته‌شده با میزی" watermark under the menu unless the café's
plan has the `watermark_removed` feature (Starter+).

- PublicMenuDto gains ShowWatermark; PublicService computes it from
  IsFeatureEnabledForCafeAsync("watermark_removed") for both slug and branch menus.
- Guest menu renders the watermark footer when showWatermark.
- NoOpPlatformCatalogService test double (all features on) for the PublicService
  ctor; QrMenuTests updated.

86 tests pass; dashboard tsc clean.

src/Meezi.API/Models/Public/PublicDtos.cs

@@ -107,7 +107,8 @@ public record PublicMenuDto(
     string CafeName,
     string Slug,
     CafeThemeDto Theme,
-    IReadOnlyList<PublicMenuCategoryDto> Categories);
+    IReadOnlyList<PublicMenuCategoryDto> Categories,
+    bool ShowWatermark);
 
 public record GuestCreateOrderRequest(
     OrderType OrderType,

src/Meezi.API/Services/PublicService.cs

@@ -53,6 +53,7 @@ public class PublicService : IPublicService
     private readonly IBranchIdentityService _identity;
     private readonly IAbuseProtectionService _abuse;
     private readonly IHttpContextAccessor _http;
+    private readonly Meezi.Infrastructure.Services.Platform.IPlatformCatalogService _catalog;
 
     public PublicService(
         AppDbContext db,
@@ -62,7 +63,8 @@ public class PublicService : IPublicService
         IBranchMenuService branchMenu,
         IBranchIdentityService identity,
         IAbuseProtectionService abuse,
-        IHttpContextAccessor http)
+        IHttpContextAccessor http,
+        Meezi.Infrastructure.Services.Platform.IPlatformCatalogService catalog)
     {
         _db = db;
         _orders = orders;
@@ -72,8 +74,13 @@ public class PublicService : IPublicService
         _identity = identity;
         _abuse = abuse;
         _http = http;
+        _catalog = catalog;
     }
 
+    /// <summary>Free menus show a Meezi watermark; the `watermark_removed` feature (paid) hides it.</summary>
+    private async Task<bool> ShowWatermarkAsync(Cafe cafe, CancellationToken ct) =>
+        !await _catalog.IsFeatureEnabledForCafeAsync(cafe.Id, cafe.PlanTier, "watermark_removed", ct);
+
     public Task<IReadOnlyList<CafeDiscoverDto>> DiscoverAsync(
         DiscoverFilterParams filters,
         CancellationToken cancellationToken = default) =>
@@ -190,7 +197,8 @@ public class PublicService : IPublicService
             .Where(c => c.Items.Count > 0)
             .ToList();
 
-        return new PublicMenuDto(cafe.Id, cafe.Name, cafe.Slug, CafeThemeMapping.FromJson(cafe.ThemeJson), grouped);
+        return new PublicMenuDto(cafe.Id, cafe.Name, cafe.Slug, CafeThemeMapping.FromJson(cafe.ThemeJson), grouped,
+            await ShowWatermarkAsync(cafe, cancellationToken));
     }
 
     public async Task<(GuestOrderPlacedDto? Data, string? ErrorCode, string? ErrorMessage)> PlaceOrderAsync(
@@ -357,7 +365,8 @@ public class PublicService : IPublicService
             .OrderBy(c => categoryById.GetValueOrDefault(c.Id)?.SortOrder ?? 0)
             .ToList();
 
-        return new PublicMenuDto(cafe.Id, cafe.Name, cafe.Slug, CafeThemeMapping.FromJson(cafe.ThemeJson), grouped);
+        return new PublicMenuDto(cafe.Id, cafe.Name, cafe.Slug, CafeThemeMapping.FromJson(cafe.ThemeJson), grouped,
+            await ShowWatermarkAsync(cafe, cancellationToken));
     }
 
     public async Task<(GuestQrOrderPlacedDto? Data, string? ErrorCode, string? Message)> PlaceBranchGuestOrderAsync(

tests/Meezi.API.Tests/NoOpPlatformCatalogService.cs

@@ -0,0 +1,44 @@
+using Meezi.Core.Enums;
+using Meezi.Core.Platform;
+using Meezi.Infrastructure.Services.Platform;
+
+namespace Meezi.API.Tests;
+
+/// <summary>Test double: every feature enabled, unlimited limits. Keeps plan gating
+/// out of the way for service-level tests.</summary>
+internal sealed class NoOpPlatformCatalogService : IPlatformCatalogService
+{
+    public Task<IReadOnlyList<PlanDefinitionDto>> GetPlansAsync(CancellationToken ct = default) =>
+        Task.FromResult<IReadOnlyList<PlanDefinitionDto>>([]);
+
+    public Task<PlanDefinitionDto?> GetPlanAsync(PlanTier tier, CancellationToken ct = default) =>
+        Task.FromResult<PlanDefinitionDto?>(null);
+
+    public Task<PlanLimitsData> GetLimitsAsync(PlanTier tier, CancellationToken ct = default) =>
+        Task.FromResult(new PlanLimitsData());
+
+    public Task<decimal> GetMonthlyPriceTomanAsync(PlanTier tier, CancellationToken ct = default) =>
+        Task.FromResult(0m);
+
+    public Task<bool> IsBillableOnlineAsync(PlanTier tier, CancellationToken ct = default) =>
+        Task.FromResult(false);
+
+    public Task<IReadOnlyList<PlatformSettingDto>> GetSettingsAsync(CancellationToken ct = default) =>
+        Task.FromResult<IReadOnlyList<PlatformSettingDto>>([]);
+
+    public Task<string?> GetSettingAsync(string key, CancellationToken ct = default) =>
+        Task.FromResult<string?>(null);
+
+    public Task<IReadOnlyList<PlatformFeatureDto>> GetFeaturesAsync(CancellationToken ct = default) =>
+        Task.FromResult<IReadOnlyList<PlatformFeatureDto>>([]);
+
+    public Task<IReadOnlyDictionary<string, bool>> GetEffectiveFeaturesForCafeAsync(
+        string cafeId, PlanTier planTier, CancellationToken ct = default) =>
+        Task.FromResult<IReadOnlyDictionary<string, bool>>(new Dictionary<string, bool>());
+
+    public Task<bool> IsFeatureEnabledForCafeAsync(
+        string cafeId, PlanTier planTier, string featureKey, CancellationToken ct = default) =>
+        Task.FromResult(true);
+
+    public void InvalidateCache() { }
+}

tests/Meezi.API.Tests/QrMenuTests.cs

@@ -120,7 +120,7 @@ public class QrMenuTests
         var http = new HttpContextAccessor();
         var media = new NoOpMediaStorageService();
         var reviews = new ReviewService(db, abuse, http, media);
-        var publicSvc = new PublicService(db, orders, reviews, kds, branchMenu, identity, abuse, http);
+        var publicSvc = new PublicService(db, orders, reviews, kds, branchMenu, identity, abuse, http, new NoOpPlatformCatalogService());
 
         return (db, tables, publicSvc, cafeId, branchId, tableId, itemA, itemB, qrCode);
     }

web/dashboard/src/components/qr/qr-guest-menu.tsx

@@ -65,6 +65,7 @@ export function QrGuestMenu({ code }: QrGuestMenuProps) {
   const [tableOrders, setTableOrders] = useState<GuestOrderRef[]>([]);
   const [submitting, setSubmitting] = useState(false);
   const [menuTheme, setMenuTheme] = useState<CafeTheme | null>(null);
+  const [showWatermark, setShowWatermark] = useState(false);
   const [searchQuery, setSearchQuery] = useState("");
   const [view3dItem, setView3dItem] = useState<QrPublicMenuItem | null>(null);
   const [security, setSecurity] = useState<PublicSecurityConfig | null>(null);
@@ -111,6 +112,7 @@ export function QrGuestMenu({ code }: QrGuestMenuProps) {
         const cats = menu.categories ?? [];
         setCategories(cats);
         setMenuTheme(normalizeCafeTheme(menu.theme ?? undefined));
+        setShowWatermark(menu.showWatermark ?? false);
         setActiveCategory(QR_ALL_CATEGORY_ID);
         if (cats.length === 0) {
           setError(t("emptyMenu"));
@@ -565,6 +567,16 @@ export function QrGuestMenu({ code }: QrGuestMenuProps) {
             view3d: t("view3d"),
           }}
         />
+        {showWatermark ? (
+          <a
+            href="https://meezi.ir"
+            target="_blank"
+            rel="noopener noreferrer"
+            className="flex items-center justify-center gap-1 py-5 text-xs qr-muted opacity-70"
+          >
+            ساخته‌شده با <span className="font-bold">میزی</span>
+          </a>
+        ) : null}
       </div>
       {totalItems > 0 ? (
         <div className="pointer-events-none fixed inset-x-0 bottom-[3.25rem] z-40 mx-auto max-w-md px-3 pb-1">

web/dashboard/src/lib/api/qr-public.ts

@@ -53,6 +53,8 @@ export type QrPublicMenu = {
   slug: string;
   theme?: CafeTheme | null;
   categories: QrPublicMenuCategory[];
+  /** Free plan shows the Meezi watermark under the menu; paid plans hide it. */
+  showWatermark?: boolean;
 };
 
 export type QrCartLine = {