fix: ignore raw Dio blobs in API responses and replace email change dialog with a scrollable bottom sheet.

lib/core/network/api_client.dart

@@ -255,20 +255,31 @@ class ApiClient {
             : rawMessage?.toString();
 
         if (message != null && message.isNotEmpty) {
-          final errors = (dataMap['errors'] as List<dynamic>?)
-                  ?.map((e) => FieldError.fromJson(e as Map<String, dynamic>))
-                  .toList() ??
-              [];
+          // Defensive: if the backend echoed back the raw Dio exception
+          // toString (e.g. "ApiException: This exception was thrown..."),
+          // ignore it and fall through to the friendly status-code message.
+          final looksLikeRawDioBlob =
+              message.startsWith('ApiException:') ||
+                  message.contains('RequestOptions.validateStatus') ||
+                  message.contains('This exception was thrown because');
 
-          return DioException(
-            requestOptions: error.requestOptions,
-            response: error.response,
-            error: ApiException(
-              message: message,
-              statusCode: response.statusCode,
-              fieldErrors: errors,
-            ),
-          );
+          if (!looksLikeRawDioBlob) {
+            final errors = (dataMap['errors'] as List<dynamic>?)
+                    ?.map(
+                        (e) => FieldError.fromJson(e as Map<String, dynamic>))
+                    .toList() ??
+                [];
+
+            return DioException(
+              requestOptions: error.requestOptions,
+              response: error.response,
+              error: ApiException(
+                message: message,
+                statusCode: response.statusCode,
+                fieldErrors: errors,
+              ),
+            );
+          }
         }
       }
     }