feat: mobile-like window size and always-visible stats

- Changed window size to mobile phone format (400x800)
- Removed width condition for ActiveProxyFooter - now always visible
- Added run-umbrix.sh launch script with icon copying
- Stats cards now display on all screen sizes

lib/core/analytics/analytics_logger.dart

@@ -1,4 +1,4 @@
-import 'package:hiddify/utils/sentry_utils.dart';
+import 'package:umbrix/utils/sentry_utils.dart';
 import 'package:loggy/loggy.dart';
 import 'package:sentry_flutter/sentry_flutter.dart';