feat(plans): Stage 3b — DB-driven gates for reviews/styling/limits

Make more plan rules read the admin-editable catalog instead of hardcoded values:
- Review reply gated by the `review_reply` feature (Starter+) — 403 if not in plan.
- Custom menu styling gated by `custom_menu_styling` (Starter+): only blocks an
  actual theme change, so a normal settings save re-sending the current theme is fine.
- Menu categories/items limits now read catalog.GetLimitsAsync (Free categories
  editable; message no longer hardcodes a number).
- Terminals limit reads the catalog (enforcement in TerminalRegistryService +
  the displayed max in TerminalsController).

Remaining (small): menu watermark (Free shows it, `watermark_removed` removes it —
needs the public-menu render), report-history (static ReportPlanGate) and AI-3D
routing — these already enforce the correct matrix values, just not yet editable.

86 tests pass; build clean.

src/Meezi.API/Controllers/MenuController.cs

@@ -7,6 +7,7 @@ using Meezi.Core.Constants;
 using Meezi.Core.Enums;
 using Meezi.Core.Interfaces;
 using Meezi.Infrastructure.Data;
+using Meezi.Infrastructure.Services.Platform;
 using Meezi.Shared;
 
 namespace Meezi.API.Controllers;
@@ -19,24 +20,27 @@ public class MenuController : CafeApiControllerBase
     private readonly IValidator<CreateMenuCategoryRequest> _createCategoryValidator;
     private readonly IValidator<CreateMenuItemRequest> _createItemValidator;
     private readonly AppDbContext _db;
+    private readonly IPlatformCatalogService _catalog;
 
     private const string CategoryLimitMessage =
-        "محدودیت دسته‌بندی پلن رایگان (۳ دسته). برای افزودن دسته‌بندی بیشتر، پلن خود را ارتقا دهید.";
+        "به سقف دسته‌بندی منوی پلن شما رسیدید. برای افزودن دسته‌بندی بیشتر، پلن خود را ارتقا دهید.";
     private const string ItemLimitMessage =
-        "محدودیت آیتم منو پلن رایگان (۳۰ آیتم). برای افزودن آیتم بیشتر، پلن خود را ارتقا دهید.";
+        "به سقف آیتم منوی پلن شما رسیدید. برای افزودن آیتم بیشتر، پلن خود را ارتقا دهید.";
 
     public MenuController(
         IMenuService menuService,
         IMenuAi3dGenerationService menuAi3d,
         IValidator<CreateMenuCategoryRequest> createCategoryValidator,
         IValidator<CreateMenuItemRequest> createItemValidator,
-        AppDbContext db)
+        AppDbContext db,
+        IPlatformCatalogService catalog)
     {
         _menuService = menuService;
         _menuAi3d = menuAi3d;
         _createCategoryValidator = createCategoryValidator;
         _createItemValidator = createItemValidator;
         _db = db;
+        _catalog = catalog;
     }
 
     [HttpGet("categories")]
@@ -59,7 +63,7 @@ public class MenuController : CafeApiControllerBase
         if (!validation.IsValid) return BadRequest(ValidationError(validation));
 
         var tier = tenant.PlanTier ?? PlanTier.Free;
-        var max = PlanLimits.MaxMenuCategories(tier);
+        var max = (await _catalog.GetLimitsAsync(tier, cancellationToken)).MaxMenuCategories;
         if (max != int.MaxValue)
         {
             var count = await _db.MenuCategories.CountAsync(
@@ -120,7 +124,7 @@ public class MenuController : CafeApiControllerBase
         if (!validation.IsValid) return BadRequest(ValidationError(validation));
 
         var tier = tenant.PlanTier ?? PlanTier.Free;
-        var max = PlanLimits.MaxMenuItems(tier);
+        var max = (await _catalog.GetLimitsAsync(tier, cancellationToken)).MaxMenuItems;
         if (max != int.MaxValue)
         {
             var count = await _db.MenuItems.CountAsync(