v3.2.0 — DPI hardening, notification consolidation, disconnect refactor

User-Agent spoofed to Chrome on Android (was Dart/3.x). Domain renamed to userevolt.app. Branding to Revolt VPN. Removed duplicate notification, patched flutter_vless for custom icon + dark background. Merged 5 disconnect paths into single idempotent gate, fixed stopVless timeout silently lying about state. Removed kDebugMode guard from AdMob bypass.

lib/components/sidebar_contents/website_button.dart

@@ -6,7 +6,7 @@ class WebsiteButton extends StatelessWidget {
   const WebsiteButton({super.key});
 
   static Future<void> launchWebsite() async {
-    final Uri url = Uri.parse('https://getrevolt.app');
+    final Uri url = Uri.parse('https://userevolt.app');
     if (!await launchUrl(url, mode: LaunchMode.externalApplication)) {
       debugPrint('Could not launch $url');
     }