Fix demo reset: wipe bills/expenses, fix apostrophe display bug

- Add Bills and Expenses flags to RemoveSeedDataOptions
- RemoveSeedDataAsync: delete BillPayments + BillLineItems + Bills, then
  Expenses for the company when those flags are set
- ResetDemoCompany action: enable Bills=true and Expenses=true so all
  seeded AP data is cleared before re-seeding (was skipping on second reset)
- Fix apostrophe in success message (was ' in C# string, double-encoded
  by Razor to literal ' on screen)

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

src/PowderCoating.Web/Controllers/SeedDataController.cs

@@ -134,6 +134,8 @@ public class SeedDataController : Controller
                 Catalog        = true,
                 PricingTiers   = true,
                 OperatingCosts = true,
+                Bills          = true,
+                Expenses       = true,
             };
 
             var removeResult = await _seedDataService.RemoveSeedDataAsync(demo.Id, removeOptions);
@@ -148,7 +150,7 @@ public class SeedDataController : Controller
 
             if (seedResult.Success)
             {
-                TempData["SuccessMessage"] = $"Demo company reset complete. {seedResult.ItemsSeeded} records re-seeded with today's dates.";
+                TempData["SuccessMessage"] = $"Demo company reset complete. {seedResult.ItemsSeeded} records re-seeded with today's dates.";
                 TempData["SeedDetails"]    = string.Join("|", seedResult.Details);
                 TempData["ItemsSeeded"]    = seedResult.ItemsSeeded;
 
@@ -157,7 +159,7 @@ public class SeedDataController : Controller
                     TempData["WarningMessage"] = $"{seedResult.ItemsSkipped} item(s) were skipped";
                     var displayWarnings = seedResult.Warnings.Take(30).ToList();
                     if (seedResult.Warnings.Count > 30)
-                        displayWarnings.Add($"… and {seedResult.Warnings.Count - 30} more (see logs)");
+                        displayWarnings.Add($"... and {seedResult.Warnings.Count - 30} more (see logs)");
                     TempData["SeedWarnings"] = string.Join("|", displayWarnings);
                 }
             }

src/PowderCoating.Web/Views/SeedData/Index.cshtml

@@ -117,7 +117,7 @@
                     so jobs, quotes, invoices, and AR aging always look current.
                 </p>
                 <ul class="mb-3 small">
-                    <li>Removes: customers, jobs, quotes, invoices, inventory, equipment, catalog, pricing tiers, operating costs</li>
+                    <li>Removes: customers, jobs, quotes, invoices, inventory, equipment, catalog, pricing tiers, operating costs, vendor bills, expenses</li>
                     <li>Re-seeds: 100 customers, 50 jobs across all statuses, quotes, invoices, inventory transactions, vendor bills, appointments &mdash; all dated from today</li>
                     <li>Preserves: user accounts, company settings, lookup tables (job statuses, priorities, etc.)</li>
                 </ul>