Refactor signature box layout and improve readability

Refactored the signature box layout to dynamically calculate
positions based on content, improving flexibility and precision.
Introduced new constants (`lineH`, `bgPad`) to standardize
spacing and replaced hardcoded values for better maintainability.
Adjusted background rectangle sizing to fit content dynamically
and improved text layout logic to handle optional fields more
gracefully. Simplified image area logic and reduced redundant
calculations. Overall, improved code readability and alignment
for a cleaner, more compact layout.

EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/EnvelopeReceiverReportSignedPage.razor

@@ -208,17 +208,16 @@
 
         const double sigW   = 1.77 * 72;  // 127.44 pt
         const double sigH   = 1.96 * 72;  // 141.12 pt
-        const double imgRatio  = 0.52;   // top 52% = image  (was 0.60)
+        const double imgRatio = 0.52;      // top 52% = image
-        const double textRatio = 0.43;   // bottom 43% = text (was 0.38)
+        const double lineH    = 11.5;      // fixed row height matching font size (bold 7.5pt + normal 6.5pt)
+        const double bgPad    = 3.0;       // background box padding around content (pt)
 
         var black     = PdfSharp.Drawing.XColor.FromArgb(255, 20,  20,  20);
         var darkGray  = PdfSharp.Drawing.XColor.FromArgb(255, 80,  80,  80);
         var lineColor = PdfSharp.Drawing.XColor.FromArgb(180, 100, 100, 120);
 
-        // Background: paper/cream tone, no border
         var bgColor = PdfSharp.Drawing.XColor.FromArgb(255, 255, 253, 240);
         var bgBrush = new PdfSharp.Drawing.XSolidBrush(bgColor);
-        const double bgPad = 3.0;  // extra padding around the signature box (pt)
 
         var fontBold   = new PdfSharp.Drawing.XFont("Arial", 7.5, PdfSharp.Drawing.XFontStyleEx.Bold);
         var fontNormal = new PdfSharp.Drawing.XFont("Arial", 6.5, PdfSharp.Drawing.XFontStyleEx.Regular);
@@ -244,44 +243,52 @@
             double x = field.X;
             double y = field.Y;
 
-            // --- Background rectangle (drawn first, sits between PDF and signature) ---
+            // --- Calculate layout positions first (needed for bg rect) ---
-            var bgRect = new PdfSharp.Drawing.XRect(x - bgPad, y - bgPad, sigW + bgPad * 2, sigH + bgPad * 2);
+            double imgH  = sigH * imgRatio;
+            double lineY = y + imgH + 1.0;   // 1pt gap between image and separator
+            double textY = lineY + 1.5;       // 1.5pt gap below separator line
+            double padding = 3;
+
+            // Row 1: FullName
+            double row1Y = textY;
+            // Row 2: Position (optional)
+            double row2Y = row1Y + lineH;
+            // Row 3: Place, Date — immediately after row2 regardless of position
+            double row3Y = !string.IsNullOrWhiteSpace(sig.Position) ? row2Y + lineH : row2Y;
+            double contentBottom = row3Y + lineH;
+
+            // --- Background rectangle sized to actual content (not full sigH) ---
+            var bgRect = new PdfSharp.Drawing.XRect(
+                x - bgPad,
+                y - bgPad,
+                sigW + bgPad * 2,
+                (contentBottom - y) + bgPad * 2);
             gfx.DrawRectangle(bgBrush, bgRect);
 
             // --- Image area ---
-            double imgH    = sigH * imgRatio;
             var imgRect = new PdfSharp.Drawing.XRect(x, y, sigW, imgH);
-
             using var imgStream = new System.IO.MemoryStream(imgBytes);
             var xImg = PdfSharp.Drawing.XImage.FromStream(imgStream);
             gfx.DrawImage(xImg, imgRect);
 
             // --- Separator line ---
-            double lineY = y + imgH + sigH * 0.005;  // was 0.01 — tighter gap after image
             gfx.DrawLine(linePen, x + 2, lineY, x + sigW - 2, lineY);
 
-            // --- Text area ---
+            // --- Text rows ---
-            double textY    = lineY + 1;              // was +2 — tighter gap below line
-            double textH    = sigH * textRatio;
-            double lineH    = textH / 3.0;            // was /3.5 — rows closer together
-            double padding  = 3;
-
             // Row 1: FullName (bold)
-            var nameRect = new PdfSharp.Drawing.XRect(x + padding, textY, sigW - padding * 2, lineH);
+            var nameRect = new PdfSharp.Drawing.XRect(x + padding, row1Y, sigW - padding * 2, lineH);
             gfx.DrawString(sig.FullName, fontBold, new PdfSharp.Drawing.XSolidBrush(black), nameRect, fmtLeft);
 
             // Row 2: Position (optional)
-            double row2Y = textY + lineH;
             if (!string.IsNullOrWhiteSpace(sig.Position))
             {
                 var posRect = new PdfSharp.Drawing.XRect(x + padding, row2Y, sigW - padding * 2, lineH);
                 gfx.DrawString(sig.Position, fontNormal, new PdfSharp.Drawing.XSolidBrush(darkGray), posRect, fmtLeft);
-                row2Y += lineH;
             }
 
-            // Row 3 (or 2 if no position): Place, Date
+            // Row 3: Place, Date
             var placeDate = $"{sig.Place}, {date}";
-            var dateRect  = new PdfSharp.Drawing.XRect(x + padding, row2Y, sigW - padding * 2, lineH);
+            var dateRect  = new PdfSharp.Drawing.XRect(x + padding, row3Y, sigW - padding * 2, lineH);
             gfx.DrawString(placeDate, fontNormal, new PdfSharp.Drawing.XSolidBrush(darkGray), dateRect, fmtLeft);
         }