feat(plans): report-history + AI-3D limits read from the catalog (S3 finish)

The last two limits that still read hardcoded PlanLimits now come from the
admin-editable catalog, so editing them in the admin panel takes effect:

- ReportPlanGate is now limit-driven (takes int maxDays, not a tier); ReportsController
  resolves MaxReportHistoryDays from catalog.GetLimitsAsync. LimitMessage is generic
  (reflects the actual days). EnsureReportDateAllowed is now async.
- MenuAi3dGenerationService.ResolveLimitAsync reads MaxMenuAi3dPerMonth from the catalog.

Every plan limit + feature gate is now DB-driven and admin-editable. 86 tests pass.

src/Meezi.API/Services/MenuAi3dGenerationService.cs

@@ -141,7 +141,7 @@ public class MenuAi3dGenerationService : IMenuAi3dGenerationService
     {
         if (!await _catalog.IsFeatureEnabledForCafeAsync(cafeId, planTier, FeatureMenu3dAi, cancellationToken))
             return 0;
-        return PlanLimits.MaxMenuAi3dPerMonth(planTier);
+        return (await _catalog.GetLimitsAsync(planTier, cancellationToken)).MaxMenuAi3dPerMonth;
     }
 
     private static string UsageKey(string cafeId) =>

src/Meezi.API/Services/ReportPlanGate.cs

@@ -1,13 +1,13 @@
-using Meezi.Core.Constants;
-using Meezi.Core.Enums;
-
 namespace Meezi.API.Services;
 
+/// <summary>
+/// Report-history window checks. Takes the (admin-editable) max-history days
+/// directly so the limit comes from the plan catalog, not a hardcoded tier table.
+/// </summary>
 public static class ReportPlanGate
 {
-    public static bool IsDateInRange(PlanTier tier, DateOnly date, DateOnly todayIran)
+    public static bool IsDateInRange(int maxDays, DateOnly date, DateOnly todayIran)
     {
-        var maxDays = PlanLimits.MaxReportHistoryDays(tier);
         if (maxDays == int.MaxValue)
             return date <= todayIran;
 
@@ -16,16 +16,15 @@ public static class ReportPlanGate
     }
 
     public static (DateOnly From, DateOnly To)? ClampRange(
-        PlanTier tier,
+        int maxDays,
         DateOnly from,
         DateOnly to,
         DateOnly todayIran)
     {
         if (from > to) return null;
-        if (!IsDateInRange(tier, to, todayIran) || !IsDateInRange(tier, from, todayIran))
+        if (!IsDateInRange(maxDays, to, todayIran) || !IsDateInRange(maxDays, from, todayIran))
             return null;
 
-        var maxDays = PlanLimits.MaxReportHistoryDays(tier);
         if (maxDays == int.MaxValue)
             return (from, to);
 
@@ -36,16 +35,8 @@ public static class ReportPlanGate
         return (clampedFrom, clampedTo);
     }
 
-    public static string LimitMessage(PlanTier tier)
-    {
-        var days = PlanLimits.MaxReportHistoryDays(tier);
-        return tier switch
-        {
-            PlanTier.Free =>
-                "Daily reports on the Free plan are limited to today and the previous 7 days. Upgrade to Pro for 90 days of history.",
-            PlanTier.Pro =>
-                "Daily reports on the Pro plan are limited to the last 90 days. Upgrade to Business for unlimited history.",
-            _ => "Report date is outside your plan range."
-        };
-    }
+    public static string LimitMessage(int maxDays) =>
+        maxDays == int.MaxValue
+            ? "Report date is outside the allowed range."
+            : $"Daily reports on your plan are limited to the last {maxDays} days. Upgrade for more history.";
 }