Error while dragging fields fixed

EnvelopeGenerator.ReceiverUIBlazor/wwwroot/css/app.css

@@ -110,6 +110,7 @@ canvas {
     background: rgba(15, 23, 42, 0.9);
     box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
     user-select: none;
+    touch-action: none;
 }
 
 .overlay.signature img {

EnvelopeGenerator.ReceiverUIBlazor/wwwroot/js/pdfInterop.js

@@ -273,6 +273,24 @@
             const pad = pointerPads.get(canvasId);
             if (!pad) return null;
             return pad.canvas.toDataURL('image/png');
+        },
+        capturePointer: (element, pointerId) => {
+            if (element && element.setPointerCapture) {
+                try {
+                    element.setPointerCapture(pointerId);
+                } catch (err) {
+                    console.warn('capturePointer failed', err);
+                }
+            }
+        },
+        releasePointer: (element, pointerId) => {
+            if (element && element.releasePointerCapture) {
+                try {
+                    element.releasePointerCapture(pointerId);
+                } catch (err) {
+                    console.warn('releasePointer failed', err);
+                }
+            }
         }
     };
 })();