feat: dim unreachable event rows in expired certificate reports

CertReports.Syncfusion/Services/Implementations/EventiSectionRenderer.cs

@@ -5,6 +5,7 @@ using Syncfusion.Drawing;
 using Syncfusion.Pdf;
 using Syncfusion.Pdf.Graphics;
 using Syncfusion.Pdf.Grid;
+using System.Globalization;
 
 namespace CertReports.Syncfusion.Services.Implementations;
 
@@ -86,6 +87,15 @@ public class EventiSectionRenderer : IPdfSectionRenderer
             hr.Cells[i].StringFormat = new PdfStringFormat(PdfTextAlignment.Center);
         }
 
+        // Pre-parse DataRimborso per confronto righe non raggiungibili (solo expired)
+        DateTime? rimborsoDate = null;
+        if (isExpired && !string.IsNullOrEmpty(data.Info.DataRimborso) &&
+            DateTime.TryParseExact(data.Info.DataRimborso, "dd/MM/yyyy",
+                CultureInfo.InvariantCulture, DateTimeStyles.None, out var rd))
+        {
+            rimborsoDate = rd;
+        }
+
         // Righe dati
         for (int i = 0; i < data.Eventi.Count; i++)
         {
@@ -133,6 +143,16 @@ public class EventiSectionRenderer : IPdfSectionRenderer
             // Evidenzia "SI" nella colonna Pagato
             if (evt.Paid == "SI")
                 row.Cells[paidColIndex].Style.TextBrush = PdfTheme.PositiveBrush as PdfBrush;
+
+            // Righe non raggiungibili: testo grigio dimmed (ObservationDate > DataRimborso)
+            if (rimborsoDate.HasValue &&
+                DateTime.TryParseExact(evt.ObservationDate, "dd/MM/yyyy",
+                    CultureInfo.InvariantCulture, DateTimeStyles.None, out var obsDate) &&
+                obsDate > rimborsoDate.Value)
+            {
+                foreach (var cell in row.Cells.OfType<PdfGridCell>())
+                    cell.Style.TextBrush = PdfTheme.GrayedOutBrush;
+            }
         }
 
         // Larghezze colonne (landscape A4 ~ 757 punti utili)