update app

index.html

@@ -1351,8 +1351,17 @@
                         canvas.width = 64;
                         canvas.height = 64;
                         const ctx = canvas.getContext('2d');
-                        ctx.fillStyle = '#ffffff'; // White bg for transparency safety
+                        
+                        // Fill white background (corners will stay white)
+                        ctx.fillStyle = '#ffffff';
                         ctx.fillRect(0, 0, 64, 64);
+                        
+                        // Apply circular clipping mask
+                        ctx.beginPath();
+                        ctx.arc(32, 32, 32, 0, Math.PI * 2, true);
+                        ctx.closePath();
+                        ctx.clip();
+                        
                         ctx.drawImage(img, 0, 0, 64, 64);
                         avatarBase64 = canvas.toDataURL('image/jpeg', 0.95);