Fix windows admin auto launch issues

Add android vpn options

Support proxies icon configuration

Optimize android immersion display

Fix some issues

lib/common/string.dart

@@ -1,3 +1,8 @@
+import 'dart:convert';
+import 'dart:typed_data';
+
+import 'package:flutter/material.dart';
+
 extension StringExtension on String {
   bool get isUrl {
     return RegExp(r'^(http|https|ftp)://').hasMatch(this);
@@ -8,4 +13,38 @@ extension StringExtension on String {
       other.toLowerCase(),
     );
   }
+
+  List<int> get encodeUtf16LeWithBom {
+    final byteData = ByteData(length * 2);
+    final bom = [0xFF, 0xFE];
+    for (int i = 0; i < length; i++) {
+      int charCode = codeUnitAt(i);
+      byteData.setUint16(i * 2, charCode, Endian.little);
+    }
+    return bom + byteData.buffer.asUint8List();
+  }
+
+  Uint8List? get getBase64 {
+    final regExp = RegExp(r'base64,(.*)');
+    final match = regExp.firstMatch(this);
+    final realValue = match?.group(1) ?? '';
+    if (realValue.isEmpty) {
+      return null;
+    }
+    try {
+      return base64.decode(realValue);
+    } catch (e) {
+      return null;
+    }
+  }
+
+  bool get isRegex {
+    try {
+      RegExp(this);
+      return true;
+    } catch (e) {
+      debugPrint(e.toString());
+      return false;
+    }
+  }
 }