fix: Generic fixes of bugs from Support (#1774)

lib/utils/exception_handler.dart

@@ -62,6 +62,14 @@ class ExceptionHandler {
 
       await _addDeviceInfo(_file!);
 
+      // Check if a mail client is available
+      final bool canSend = await FlutterMailer.canSendMail();
+
+      if (Platform.isIOS && !canSend) {
+        debugPrint('Mail app is not available');
+        return;
+      }
+
       final MailOptions mailOptions = MailOptions(
         subject: 'Mobile App Issue',
         recipients: ['support@cakewallet.com'],

lib/utils/image_utill.dart

@@ -53,8 +53,18 @@ class ImageUtil {
             );
     } else {
       return isSvg
-          ? SvgPicture.asset(imagePath, height: _height, width: _width)
-          : Image.asset(imagePath, height: _height, width: _width);
+          ? SvgPicture.asset(
+              imagePath,
+              height: _height,
+              width: _width,
+              placeholderBuilder: (_) => Icon(Icons.error),
+            )
+          : Image.asset(
+              imagePath,
+              height: _height,
+              width: _width,
+              errorBuilder: (_, __, ___) => Icon(Icons.error),
+            );
     }
   }
 }