Fix SubscriptionServiceTests: add IPlatformSettingsService stub

Tests broke when SubscriptionService gained the platformSettings
constructor parameter in the previous session. Add NullPlatformSettingsService
stub and pass it to all 13 test instantiations.

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

tests/PowderCoating.UnitTests/SubscriptionServiceTests.cs

@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using PowderCoating.Application.Interfaces;
 using PowderCoating.Core.Entities;
 using PowderCoating.Core.Enums;
 using PowderCoating.Infrastructure.Data;
@@ -23,7 +24,7 @@ public class SubscriptionServiceTests
             new ApplicationUser { Id = "u2", CompanyId = 7, UserName = "u2", Email = "u2@example.com", FirstName = "B", LastName = "Two", IsActive = true });
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var (used, max) = await service.GetUserCountAsync(7);
 
@@ -43,7 +44,7 @@ public class SubscriptionServiceTests
             new Job { Id = 3, CompanyId = 8, JobNumber = "JOB-3", CustomerId = 1, Description = "Delivered", JobStatusId = 3, JobPriorityId = 1 });
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var (used, max) = await service.GetJobCountAsync(8);
 
@@ -76,7 +77,7 @@ public class SubscriptionServiceTests
         oldQuote.CreatedAt = DateTime.UtcNow.AddMonths(-1);
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var (used, max) = await service.GetQuoteCountAsync(9);
 
@@ -94,7 +95,7 @@ public class SubscriptionServiceTests
         context.Customers.Add(new Customer { Id = 1, CompanyId = 10, CompanyName = "Customer A" });
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var allowed = await service.CanAddCustomerAsync(10);
 
@@ -109,7 +110,7 @@ public class SubscriptionServiceTests
         context.AiItemPredictions.Add(new AiItemPrediction { Id = 1, CompanyId = 11, CreatedAt = DateTime.UtcNow.AddDays(-1) });
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var allowed = await service.CanUseAiPhotoQuoteAsync(11);
 
@@ -123,7 +124,7 @@ public class SubscriptionServiceTests
         SeedCompanyAndPlan(context, companyId: 12, plan: 6, maxAiPhotoQuotesPerMonth: 10, allowAiPhotoQuotes: false);
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var allowed = await service.CanUseAiPhotoQuoteAsync(12);
 
@@ -147,7 +148,7 @@ public class SubscriptionServiceTests
         });
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var status = await service.GetStatusAsync(20);
 
@@ -171,7 +172,7 @@ public class SubscriptionServiceTests
         });
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var status = await service.GetStatusAsync(21);
 
@@ -196,7 +197,7 @@ public class SubscriptionServiceTests
         });
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var status = await service.GetStatusAsync(22);
 
@@ -212,7 +213,7 @@ public class SubscriptionServiceTests
         company!.AiInventoryAssistEnabled = false;
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var enabled = await service.IsAiInventoryAssistEnabledAsync(13);
 
@@ -250,7 +251,7 @@ public class SubscriptionServiceTests
             });
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var (used, max) = await service.GetJobPhotoCountAsync(14, 100);
 
@@ -290,7 +291,7 @@ public class SubscriptionServiceTests
             });
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var (used, max) = await service.GetQuotePhotoCountAsync(15, 200);
 
@@ -308,7 +309,7 @@ public class SubscriptionServiceTests
             new AiItemPrediction { Id = 2, CompanyId = 16, CreatedAt = DateTime.UtcNow.AddDays(-2) });
         await context.SaveChangesAsync();
 
-        var service = new SubscriptionService(new UnitOfWork(context), context);
+        var service = new SubscriptionService(new UnitOfWork(context), context, new NullPlatformSettingsService());
 
         var allowed = await service.CanUseAiPhotoQuoteAsync(16);
 
@@ -410,3 +411,13 @@ public class SubscriptionServiceTests
             });
     }
 }
+
+/// <summary>No-op stub for IPlatformSettingsService — returns defaults for all queries.</summary>
+file sealed class NullPlatformSettingsService : IPlatformSettingsService
+{
+    public Task<string?> GetAsync(string key) => Task.FromResult<string?>(null);
+    public Task<bool> GetBoolAsync(string key, bool defaultValue = false) => Task.FromResult(defaultValue);
+    public Task<int> GetIntAsync(string key, int defaultValue) => Task.FromResult(defaultValue);
+    public Task SetAsync(string key, string? value, string? updatedBy = null) => Task.CompletedTask;
+    public Task<IReadOnlyList<PlatformSetting>> GetAllAsync() => Task.FromResult<IReadOnlyList<PlatformSetting>>(Array.Empty<PlatformSetting>().ToList());
+}