Improved MacOS support and organized screens and utils

lib/utils/proxy_settings.dart

@@ -0,0 +1,91 @@
+
+
+enum ProxyProtocol { http, https, socks4, socks5 }
+
+class ProxySettings {
+  final bool isEnabled;
+  final String host;
+  final int port;
+  final ProxyProtocol protocol;
+  final String? username;
+  final String? password;
+
+  ProxySettings({
+    this.isEnabled = false,
+    this.host = '',
+    this.port = 8080,
+    this.protocol = ProxyProtocol.http,
+    this.username,
+    this.password,
+  });
+
+
+  String toFindProxyString() {
+    if (!isEnabled || host.isEmpty) {
+      return 'DIRECT';
+    }
+
+
+    String protocolString;
+    switch (protocol) {
+      case ProxyProtocol.http:
+      case ProxyProtocol.https:
+        protocolString = 'PROXY'; // HttpClient ожидает 'PROXY' для HTTP и HTTPS
+        break;
+      case ProxyProtocol.socks4:
+
+
+        protocolString = 'SOCKS4';
+        break;
+      case ProxyProtocol.socks5:
+        protocolString = 'SOCKS5';
+        break;
+    }
+
+
+    return '$protocolString $host:$port';
+  }
+
+  ProxySettings copyWith({
+    bool? isEnabled,
+    String? host,
+    int? port,
+    ProxyProtocol? protocol,
+    String? username,
+    String? password,
+  }) {
+    return ProxySettings(
+      isEnabled: isEnabled ?? this.isEnabled,
+      host: host ?? this.host,
+      port: port ?? this.port,
+      protocol: protocol ?? this.protocol,
+      username: username ?? this.username,
+      password: password ?? this.password,
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'isEnabled': isEnabled,
+      'host': host,
+      'port': port,
+      'protocol': protocol.name,
+      'username': username,
+      'password': password,
+    };
+  }
+
+  factory ProxySettings.fromJson(Map<String, dynamic> json) {
+    return ProxySettings(
+      isEnabled: json['isEnabled'] ?? false,
+      host: json['host'] ?? '',
+      port: json['port'] ?? 8080,
+      protocol: ProxyProtocol.values.firstWhere(
+        (e) => e.name == json['protocol'],
+        orElse: () => ProxyProtocol.http,
+      ),
+      username: json['username'],
+      password: json['password'],
+    );
+  }
+}