Improve error handling and presentation

lib/domain/failures.dart

@@ -15,7 +15,7 @@ extension ErrorPresenter on TranslationsEn {
         final err = error.present(this);
         return err.type + (err.message == null ? "" : ": ${err.message}");
       case DioException():
-        return error.toString();
+        return error.present(this);
       default:
         return null;
     }
@@ -27,8 +27,37 @@ extension ErrorPresenter on TranslationsEn {
   String? mayPrintError(Object? error) =>
       error != null ? _errorToMessage(error) : null;
 
-  ({String type, String? message}) presentError(Object error) {
-    if (error case Failure()) return error.present(this);
-    return (type: failure.unexpected, message: null);
+  ({String type, String? message}) presentError(
+    Object error, {
+    String? action,
+  }) {
+    final ({String type, String? message}) presentable;
+    if (error case Failure()) {
+      presentable = error.present(this);
+    } else {
+      presentable = (type: failure.unexpected, message: null);
+    }
+    return (
+      type: action == null ? presentable.type : "$action: ${presentable.type}",
+      message: presentable.message,
+    );
+  }
+}
+
+extension DioExceptionPresenter on DioException {
+  String presentType(TranslationsEn t) => switch (type) {
+        DioExceptionType.connectionTimeout ||
+        DioExceptionType.sendTimeout ||
+        DioExceptionType.receiveTimeout =>
+          t.failure.connection.timeout,
+        DioExceptionType.badCertificate => t.failure.connection.badCertificate,
+        DioExceptionType.badResponse => t.failure.connection.badResponse,
+        DioExceptionType.connectionError =>
+          t.failure.connection.connectionError,
+        _ => t.failure.unexpected,
+      };
+
+  String present(TranslationsEn t) {
+    return presentType(t) + (message == null ? "" : "\n$message");
   }
 }