Add three-layer feature gating for AI Catalog Price Check

Adds platform-level, plan-level (Enterprise only), and per-company
toggles for the AI Catalog Price Check feature. Includes:
- Company.AiCatalogPriceCheckEnabled per-company flag
- SubscriptionPlanConfig.AllowAiCatalogPriceCheck plan-level flag
- PlatformSetting 'AiCatalogPriceCheckEnabled' global kill switch
- IPlatformSettingsService.GetBoolAsync helper
- ISubscriptionService.CanUseAiCatalogPriceCheckAsync
- UI controls in Companies/Edit, PlatformSubscription/Edit+Index,
  and SubscriptionManagement/Manage
- Migration AddAiCatalogPriceCheckGating applied

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Infrastructure/Migrations/20260426122625_AddAiCatalogPriceCheckGating.cs

@@ -0,0 +1,98 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace PowderCoating.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddAiCatalogPriceCheckGating : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "AllowAiCatalogPriceCheck",
+                table: "SubscriptionPlanConfigs",
+                type: "bit",
+                nullable: false,
+                defaultValue: false);
+
+            migrationBuilder.AddColumn<bool>(
+                name: "AiCatalogPriceCheckEnabled",
+                table: "Companies",
+                type: "bit",
+                nullable: false,
+                defaultValue: false);
+
+            migrationBuilder.InsertData(
+                table: "PlatformSettings",
+                columns: ["Id", "Key", "Value", "Label", "Description", "GroupName"],
+                values: new object[,]
+                {
+                    { 9, "AiCatalogPriceCheckEnabled", "true", "AI Catalog Price Check Enabled",
+                      "When true (default), the AI Catalog Price Check feature is available to companies on qualifying plans. Set to false to disable it platform-wide.",
+                      "AI Features" }
+                });
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 1,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 26, 12, 26, 21, 727, DateTimeKind.Utc).AddTicks(5012));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 2,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 26, 12, 26, 21, 727, DateTimeKind.Utc).AddTicks(5018));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 3,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 26, 12, 26, 21, 727, DateTimeKind.Utc).AddTicks(5020));
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DeleteData(
+                table: "PlatformSettings",
+                keyColumn: "Id",
+                keyValue: 9);
+
+            migrationBuilder.DropColumn(
+                name: "AllowAiCatalogPriceCheck",
+                table: "SubscriptionPlanConfigs");
+
+            migrationBuilder.DropColumn(
+                name: "AiCatalogPriceCheckEnabled",
+                table: "Companies");
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 1,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 25, 22, 34, 50, 1, DateTimeKind.Utc).AddTicks(6987));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 2,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 25, 22, 34, 50, 1, DateTimeKind.Utc).AddTicks(6993));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 3,
+                column: "CreatedAt",
+                value: new DateTime(2026, 4, 25, 22, 34, 50, 1, DateTimeKind.Utc).AddTicks(6994));
+        }
+    }
+}

src/PowderCoating.Infrastructure/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -1530,6 +1530,9 @@ namespace PowderCoating.Infrastructure.Migrations
                     b.Property<string>("Address")
                         .HasColumnType("nvarchar(max)");
 
+                    b.Property<bool>("AiCatalogPriceCheckEnabled")
+                        .HasColumnType("bit");
+
                     b.Property<bool>("AiInventoryAssistEnabled")
                         .HasColumnType("bit");
 
@@ -5833,7 +5836,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 1,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 4, 25, 22, 34, 50, 1, DateTimeKind.Utc).AddTicks(6987),
+                            CreatedAt = new DateTime(2026, 4, 26, 12, 26, 21, 727, DateTimeKind.Utc).AddTicks(5012),
                             Description = "Standard pricing for regular customers",
                             DiscountPercent = 0m,
                             IsActive = true,
@@ -5844,7 +5847,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 2,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 4, 25, 22, 34, 50, 1, DateTimeKind.Utc).AddTicks(6993),
+                            CreatedAt = new DateTime(2026, 4, 26, 12, 26, 21, 727, DateTimeKind.Utc).AddTicks(5018),
                             Description = "5% discount for preferred customers",
                             DiscountPercent = 5m,
                             IsActive = true,
@@ -5855,7 +5858,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 3,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 4, 25, 22, 34, 50, 1, DateTimeKind.Utc).AddTicks(6994),
+                            CreatedAt = new DateTime(2026, 4, 26, 12, 26, 21, 727, DateTimeKind.Utc).AddTicks(5020),
                             Description = "10% discount for premium customers",
                             DiscountPercent = 10m,
                             IsActive = true,
@@ -7183,6 +7186,9 @@ namespace PowderCoating.Infrastructure.Migrations
                     b.Property<bool>("AllowAccounting")
                         .HasColumnType("bit");
 
+                    b.Property<bool>("AllowAiCatalogPriceCheck")
+                        .HasColumnType("bit");
+
                     b.Property<bool>("AllowAiInventoryAssist")
                         .HasColumnType("bit");
 

src/PowderCoating.Infrastructure/Services/PlatformSettingsService.cs

@@ -41,6 +41,17 @@ public class PlatformSettingsService : IPlatformSettingsService
         return setting?.Value;
     }
 
+    /// <summary>
+    /// Reads a platform setting as a boolean. Returns <paramref name="defaultValue"/> when
+    /// the key is missing or the stored value cannot be parsed as a boolean.
+    /// </summary>
+    public async Task<bool> GetBoolAsync(string key, bool defaultValue = false)
+    {
+        var value = await GetAsync(key);
+        if (value == null) return defaultValue;
+        return bool.TryParse(value, out var result) ? result : defaultValue;
+    }
+
     /// <summary>
     /// Creates or updates the platform setting identified by <paramref name="key"/>.
     /// Records <paramref name="updatedBy"/> (typically the SuperAdmin's username) and

src/PowderCoating.Infrastructure/Services/SubscriptionService.cs

@@ -323,6 +323,19 @@ public class SubscriptionService : ISubscriptionService
     /// (3) monthly usage quota from <see cref="GetAiPhotoQuoteUsageAsync"/>.
     /// Comped companies bypass all three gates.
     /// </summary>
+    public async Task<bool> CanUseAiCatalogPriceCheckAsync(int companyId)
+    {
+        var (company, config) = await GetCompanyAndConfigAsync(companyId);
+        if (company == null) return false;
+        if (company.IsComped) return true;
+
+        // Plan-level gate: Enterprise plan must have this feature enabled
+        if (config != null && !config.AllowAiCatalogPriceCheck) return false;
+
+        // Company-level toggle: SuperAdmin can disable per company
+        return company.AiCatalogPriceCheckEnabled;
+    }
+
     public async Task<bool> CanUseAiPhotoQuoteAsync(int companyId)
     {
         var (company, config) = await GetCompanyAndConfigAsync(companyId);