Fix Company Settings save, invoice PAID stamp, and purge script

- Company Settings: switch save button from type=submit to type=button
  to bypass HTML5 form validation blocking the submit event; replace
  AutoMapper Map() with explicit property assignment so EF change
  tracking reliably detects mutations; fix showButtonSuccess() never
  re-enabling the button after a successful save
- Invoice PDF: move PAID stamp into the header row as a centered middle
  column so it sits between the company and invoice blocks without
  adding height to the document
- Purge script: use business-date fields instead of CreatedAt so
  imported records (which all share today's CreatedAt) are correctly
  filtered by actual transaction dates

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

src/PowderCoating.Application/Services/PdfService.cs

@@ -147,6 +147,14 @@ public class PdfService : IPdfService
                         column.Item().Text(companyInfo.PrimaryContactEmail).FontSize(9).FontColor(Colors.Grey.Darken1);
                 });
 
+                if (invoice.Status == InvoiceStatus.Paid)
+                {
+                    row.RelativeItem().AlignCenter().AlignMiddle()
+                        .Border(2).BorderColor(Colors.Green.Darken1)
+                        .PaddingVertical(6).PaddingHorizontal(16)
+                        .Text("PAID").FontSize(20).Bold().FontColor(Colors.Green.Darken1).LetterSpacing(0.15f);
+                }
+
                 row.RelativeItem().AlignRight().Column(column =>
                 {
                     column.Item().Text("INVOICE").FontSize(28).Bold().FontColor(accentColor);
@@ -158,16 +166,6 @@ public class PdfService : IPdfService
                 });
             });
 
-            if (invoice.Status == InvoiceStatus.Paid)
-            {
-                col.Item().PaddingVertical(6).AlignCenter().Column(badge =>
-                {
-                    badge.Item().AlignCenter().Border(2).BorderColor(Colors.Green.Darken1)
-                        .PaddingVertical(4).PaddingHorizontal(24)
-                        .Text("PAID").FontSize(18).Bold().FontColor(Colors.Green.Darken1).LetterSpacing(0.15f);
-                });
-            }
-
             col.Item().PaddingVertical(4).LineHorizontal(1).LineColor(accentColor);
         });
     }

src/PowderCoating.Web/Controllers/CompanySettingsController.cs

@@ -230,11 +230,19 @@ public class CompanySettingsController : Controller
                 return Json(new { success = false, message = "Company not found." });
             }
 
-            // Update company properties
-            _mapper.Map(dto, company);
-            company.UpdatedAt = DateTime.UtcNow;
+            // Explicit assignment avoids AutoMapper quirks with tracked EF entities
+            company.CompanyName         = dto.CompanyName.Trim();
+            company.CompanyCode         = string.IsNullOrWhiteSpace(dto.CompanyCode) ? null : dto.CompanyCode.Trim();
+            company.PrimaryContactName  = dto.PrimaryContactName.Trim();
+            company.PrimaryContactEmail = dto.PrimaryContactEmail.Trim();
+            company.Phone               = string.IsNullOrWhiteSpace(dto.Phone)     ? null : dto.Phone.Trim();
+            company.Address             = string.IsNullOrWhiteSpace(dto.Address)   ? null : dto.Address.Trim();
+            company.City                = string.IsNullOrWhiteSpace(dto.City)      ? null : dto.City.Trim();
+            company.State               = string.IsNullOrWhiteSpace(dto.State)     ? null : dto.State.Trim();
+            company.ZipCode             = string.IsNullOrWhiteSpace(dto.ZipCode)   ? null : dto.ZipCode.Trim();
+            company.TimeZone            = string.IsNullOrWhiteSpace(dto.TimeZone)  ? null : dto.TimeZone.Trim();
+            company.AccountingMethod    = dto.AccountingMethod;
 
-            await _unitOfWork.Companies.UpdateAsync(company);
             await _unitOfWork.CompleteAsync();
 
             _logger.LogInformation("Company {CompanyId} settings updated by user", companyId);

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

@@ -312,7 +312,7 @@
                         </div>
 
                         <div class="d-flex justify-content-end">
-                            <button type="submit" class="btn btn-primary" id="btnSaveCompanyInfo">
+                            <button type="button" class="btn btn-primary" id="btnSaveCompanyInfo">
                                 <i class="bi bi-save"></i> Save Changes
                             </button>
                         </div>
@@ -2749,10 +2749,8 @@
                 }
             });
 
-            // Company Info Form Submit
-            $('#companyInfoForm').on('submit', function (e) {
-                e.preventDefault();
-
+            // Company Info Save
+            $('#btnSaveCompanyInfo').on('click', function () {
                 const formData = {
                     CompanyName: $('#companyName').val(),
                     CompanyCode: $('#companyCode').val(),
@@ -3192,7 +3190,7 @@
 
             // Button success animation helper
             function showButtonSuccess(btn, originalHtml, duration = 2000) {
-                btn.removeClass('btn-primary').addClass('btn-success');
+                btn.prop('disabled', false).removeClass('btn-primary').addClass('btn-success');
                 btn.html('<i class="bi bi-check-circle-fill"></i> Saved!');
                 setTimeout(function() {
                     btn.removeClass('btn-success').addClass('btn-primary');