сборка: APK (Android) + Linux Desktop

- Исправлены ошибки Flutter анализа (withOpacity, pbkdf2, импорты)
- Упрощён pubspec.yaml (только нужные зависимости)
- Android APK собран: build/app/outputs/flutter-apk/app-release.apk (22MB)
- Linux Desktop собран: build/linux/x64/release/bundle/jam_client

Для Windows: кросс-компиляция невозможна с Linux.
Нужен Windows хост для flutter build windows.

client/lib/screens/chat_screen.dart

@@ -8,7 +8,6 @@ import '../services/api_service.dart';
 import '../services/theme_service.dart';
 import '../models/message.dart';
 import '../models/channel.dart';
-import '../models/guild.dart';
 import '../widgets/message_bubble.dart';
 import '../widgets/chat_input.dart';
 
@@ -28,7 +27,6 @@ class _ChatScreenState extends State<ChatScreen> {
   bool _atBottom = true;
 
   late Channel _channel;
-  late Guild _guild;
 
   @override
   void didChangeDependencies() {
@@ -36,7 +34,6 @@ class _ChatScreenState extends State<ChatScreen> {
     final args = ModalRoute.of(context)?.settings.arguments as Map?;
     if (args != null) {
       _channel = args['channel'] as Channel;
-      _guild = args['guild'] as Guild;
     }
   }
 
@@ -201,7 +198,7 @@ class _ChatScreenState extends State<ChatScreen> {
           Icon(
             _channel.isText ? Icons.tag : Icons.volume_up,
             size: 48,
-            color: ThemeService.textMuted.withValues(alpha: 0.5),
+            color: ThemeService.textMuted.withOpacity(0.5),
           ),
           const SizedBox(height: 12),
           Text(
@@ -226,7 +223,7 @@ class _ChatScreenState extends State<ChatScreen> {
           Text(
             'No messages yet. Start the conversation!',
             style: TextStyle(
-              color: ThemeService.textMuted.withValues(alpha: 0.8),
+              color: ThemeService.textMuted.withOpacity(0.8),
               fontSize: 14,
             ),
           ),

client/lib/screens/home_screen.dart

@@ -207,7 +207,7 @@ class _HomeScreenState extends State<HomeScreen> {
             color: ThemeService.surfacePrimary,
             borderRadius: BorderRadius.circular(24),
             border: Border.all(
-              color: ThemeService.success.withValues(alpha: 0.5),
+              color: ThemeService.success.withOpacity(0.5),
               width: 2,
             ),
           ),

client/lib/screens/login_screen.dart

@@ -120,10 +120,10 @@ class _LoginScreenState extends State<LoginScreen> {
                 Container(
                   padding: const EdgeInsets.all(12),
                   decoration: BoxDecoration(
-                    color: ThemeService.danger.withValues(alpha: 0.1),
+                    color: ThemeService.danger.withOpacity(0.1),
                     borderRadius: BorderRadius.circular(8),
                     border: Border.all(
-                        color: ThemeService.danger.withValues(alpha: 0.3)),
+                        color: ThemeService.danger.withOpacity(0.3)),
                   ),
                   child: Row(
                     children: [

client/lib/screens/splash_screen.dart

@@ -62,7 +62,7 @@ class _SplashScreenState extends State<SplashScreen>
                       borderRadius: BorderRadius.circular(24),
                       boxShadow: [
                         BoxShadow(
-                          color: ThemeService.primary.withValues(alpha: 0.4),
+                          color: ThemeService.primary.withOpacity(0.4),
                           blurRadius: 30,
                           spreadRadius: 5,
                         ),
@@ -94,7 +94,7 @@ class _SplashScreenState extends State<SplashScreen>
                   Text(
                     'Lightweight · Decentralized · Secure',
                     style: TextStyle(
-                      color: ThemeService.textSecondary.withValues(alpha: 0.7),
+                      color: ThemeService.textSecondary.withOpacity(0.7),
                       fontSize: 14,
                       letterSpacing: 0.5,
                     ),

client/lib/services/connection_service.dart

@@ -1,9 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
-import 'dart:typed_data';
 import 'package:flutter/foundation.dart';
 import 'package:web_socket_channel/web_socket_channel.dart';
-import '../models/message.dart';
 
 enum ConnectionState { disconnected, connecting, connected }
 

client/lib/services/crypto_service.dart

@@ -2,7 +2,7 @@ import 'dart:convert';
 import 'dart:math';
 import 'dart:typed_data';
 import 'package:crypto/crypto.dart';
-import 'package:pointycastle/export.dart' as pc;
+
 
 class CryptoService {
   static const int keySize = 32;
@@ -28,20 +28,40 @@ class CryptoService {
   }
 
   Uint8List deriveKey(String password, Uint8List salt) {
-    final key = pbkdf2(
-      hash: sha256,
-      password: utf8.encode(password),
-      salt: salt,
-      iterations: 100000,
-      keyLength: keySize,
-    );
-    return Uint8List.fromList(key);
+    return _pbkdf2(sha256, utf8.encode(password), salt, 100000, keySize);
+  }
+
+  static Uint8List _pbkdf2(Hash hash, List<int> password, List<int> salt, int iterations, int keyLength) {
+    const hLen = 32;
+    final blocks = (keyLength + hLen - 1) ~/ hLen;
+    final result = Uint8List(keyLength);
+
+    for (int block = 1; block <= blocks; block++) {
+      final blockBytes = ByteData(4)..setUint32(0, block, Endian.big);
+      final blockSalt = Uint8List.fromList([...salt, ...blockBytes.buffer.asUint8List()]);
+      final prf = Hmac(hash, password);
+      var u = prf.convert(blockSalt).bytes;
+      var t = Uint8List.fromList(u);
+
+      for (int i = 1; i < iterations; i++) {
+        u = prf.convert(u).bytes;
+        for (int j = 0; j < hLen; j++) {
+          t[j] ^= u[j];
+        }
+      }
+
+      final offset = (block - 1) * hLen;
+      final length = min(hLen, keyLength - offset);
+      result.setRange(offset, offset + length, t.sublist(0, length));
+    }
+
+    return result;
   }
 
   Uint8List encrypt(Uint8List plaintext, Uint8List key) {
-    final nonce = generateNonce();
     final hmac = Hmac(sha256, key);
     final mac = hmac.convert(plaintext).bytes;
+    final nonce = generateNonce();
 
     final result = Uint8List(nonce.length + mac.length + plaintext.length);
     result.setAll(0, nonce);
@@ -54,7 +74,6 @@ class CryptoService {
   Uint8List? decrypt(Uint8List ciphertext, Uint8List key) {
     try {
       if (ciphertext.length < nonceSize + 32) return null;
-      final nonce = ciphertext.sublist(0, nonceSize);
       final mac = ciphertext.sublist(nonceSize, nonceSize + 32);
       final plaintext = ciphertext.sublist(nonceSize + 32);
 

client/lib/widgets/message_bubble.dart

@@ -39,7 +39,7 @@ class MessageBubble extends StatelessWidget {
                       width: 32,
                       height: 32,
                       decoration: BoxDecoration(
-                        color: ThemeService.primary.withValues(alpha: 0.8),
+                        color: ThemeService.primary.withOpacity(0.8),
                         borderRadius: BorderRadius.circular(16),
                       ),
                       child: Center(
@@ -88,7 +88,7 @@ class MessageBubble extends StatelessWidget {
                           borderRadius: BorderRadius.circular(4),
                           border: Border(
                             left: BorderSide(
-                              color: ThemeService.primary.withValues(alpha: 0.5),
+                              color: ThemeService.primary.withOpacity(0.5),
                               width: 3,
                             ),
                           ),
@@ -154,7 +154,7 @@ class MessageBubble extends StatelessWidget {
             width: 120,
             height: 4,
             decoration: BoxDecoration(
-              color: ThemeService.textMuted.withValues(alpha: 0.3),
+              color: ThemeService.textMuted.withOpacity(0.3),
               borderRadius: BorderRadius.circular(2),
             ),
           ),