Commit remaining unstaged changes from this session

- Platform settings service: IPlatformSettingsService, PlatformSettingKeys,
  PlatformSettingsService, SubscriptionService, AppConstants,
  SubscriptionExpiryBackgroundService, SubscriptionMiddleware
- JobTimeEntry entity, DTOs, AutoMapper profile (ShopWorker → UserId migration)
- InventoryDtos: SourceTransactionId on PowderUsageLogDto
- InventoryTransactionRepository: include Job.Customer in ledger query
- InventoryAiLookupService: @graph unwrap + HTML price fallback
- ApplicationDbContextModelSnapshot: reflect migration changes
- launchSettings.json, publish profile

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

src/PowderCoating.Web/Middleware/SubscriptionMiddleware.cs

@@ -1,3 +1,5 @@
+using PowderCoating.Application.Interfaces;
+using PowderCoating.Core.Entities;
 using PowderCoating.Core.Interfaces;
 using PowderCoating.Shared.Constants;
 
@@ -152,7 +154,16 @@ public class SubscriptionMiddleware
             var daysUntil = subscriptionService.DaysUntilExpiry(company);
             if (daysUntil != null)
             {
-                if (daysUntil < -AppConstants.SubscriptionConstants.GracePeriodDays)
+                var platformSettings = context.RequestServices.GetRequiredService<IPlatformSettingsService>();
+                var isTrial = string.IsNullOrEmpty(company.StripeSubscriptionId);
+                var graceDays = 0;
+                if (!isTrial || await platformSettings.GetBoolAsync(PlatformSettingKeys.GracePeriodAppliesToTrials))
+                {
+                    graceDays = await platformSettings.GetIntAsync(
+                        PlatformSettingKeys.GracePeriodDays,
+                        AppConstants.SubscriptionConstants.GracePeriodDays);
+                }
+                if (daysUntil < -graceDays)
                 {
                     // Past grace period — hard lockout
                     context.Response.Redirect("/Billing/Expired");