feat: 终端同步加固与移动端最小验证 App

- 服务端: RTTY_TOKEN 最小鉴权; Ready.resumed 会话恢复语义; 会话按 ID 原子创建
- 服务端: 桌面端连接/重连时全屏 ANSI 重绘; 惰性语义快照(仅移动端订阅时生成); Ping/Pong 心跳
- 桌面端: 输入改二进制帧无损透传; 指数退避自动重连; token 输入框; resumed 状态展示
- 移动端: 修复 client=mobile 参数(此前永远收不到快照); 新增最小验证 App(连接/快照显示/输入/Keybar); 支持 token; Android 网络权限
- 测试: 修正 e2e onReady 签名; 新增移动端 widget 测试

desktop/lib/src/connection_bar.dart

@@ -13,8 +13,10 @@ class ConnectionBar extends StatelessWidget {
     required this.state,
     required this.hostController,
     required this.portController,
+    required this.tokenController,
     required this.sessionController,
     required this.sessionId,
+    required this.resumed,
     required this.terminalSize,
     required this.onConnect,
     required this.onDisconnect,
@@ -23,8 +25,10 @@ class ConnectionBar extends StatelessWidget {
   final ConnState state;
   final TextEditingController hostController;
   final TextEditingController portController;
+  final TextEditingController tokenController;
   final TextEditingController sessionController;
   final String? sessionId;
+  final bool resumed;
   final String terminalSize;
   final VoidCallback onConnect;
   final VoidCallback onDisconnect;
@@ -41,49 +45,61 @@ class ConnectionBar extends StatelessWidget {
         border: Border(bottom: BorderSide(color: RttyTheme.border)),
       ),
       padding: const EdgeInsets.symmetric(horizontal: 16),
-      child: Row(
+      // 窗口过窄时横向滚动，避免字段溢出。
-        children: [
+      child: SingleChildScrollView(
-          _StatusLight(state: state),
+        scrollDirection: Axis.horizontal,
-          const SizedBox(width: 12),
+        child: Row(
-          _ConnectionLabel(state: state),
+          children: [
-          const SizedBox(width: 16),
+            _StatusLight(state: state),
-          _Divider(),
+            const SizedBox(width: 12),
-          const SizedBox(width: 16),
+            _ConnectionLabel(state: state),
-          _EditableField(
+            const SizedBox(width: 16),
-            label: 'HOST',
+            _Divider(),
-            controller: hostController,
+            const SizedBox(width: 16),
-            enabled: !_connected,
-            width: 150,
-          ),
-          const SizedBox(width: 8),
-          _EditableField(
-            label: 'PORT',
-            controller: portController,
-            enabled: !_connected,
-            width: 64,
-            numeric: true,
-          ),
-          const SizedBox(width: 8),
-          if (!_connected) ...[
             _EditableField(
-              label: 'SESSION',
+              label: 'HOST',
-              controller: sessionController,
+              controller: hostController,
-              enabled: true,
+              enabled: !_connected,
-              width: 120,
+              width: 130,
-              hint: 'auto',
+            ),
+            const SizedBox(width: 8),
+            _EditableField(
+              label: 'PORT',
+              controller: portController,
+              enabled: !_connected,
+              width: 64,
+              numeric: true,
+            ),
+            const SizedBox(width: 8),
+            _EditableField(
+              label: 'TOKEN',
+              controller: tokenController,
+              enabled: !_connected,
+              width: 110,
+              hint: 'optional',
+            ),
+            const SizedBox(width: 8),
+            if (!_connected) ...[
+              _EditableField(
+                label: 'SESSION',
+                controller: sessionController,
+                enabled: true,
+                width: 110,
+                hint: 'auto',
+              ),
+            ] else ...[
+              _SessionBadge(sessionId: sessionId, resumed: resumed),
+            ],
+            const SizedBox(width: 24),
+            _TerminalSizeBadge(text: terminalSize),
+            const SizedBox(width: 12),
+            _ConnectButton(
+              state: state,
+              onConnect: onConnect,
+              onDisconnect: onDisconnect,
             ),
-          ] else ...[
-            _SessionBadge(sessionId: sessionId),
           ],
-          const Spacer(),
+        ),
-          _TerminalSizeBadge(text: terminalSize),
-          const SizedBox(width: 12),
-          _ConnectButton(
-            state: state,
-            onConnect: onConnect,
-            onDisconnect: onDisconnect,
-          ),
-        ],
       ),
     );
   }
@@ -222,9 +238,10 @@ class _EditableField extends StatelessWidget {
 }
 
 class _SessionBadge extends StatelessWidget {
-  const _SessionBadge({required this.sessionId});
+  const _SessionBadge({required this.sessionId, required this.resumed});
 
   final String? sessionId;
+  final bool resumed;
 
   @override
   Widget build(BuildContext context) {
@@ -236,7 +253,7 @@ class _SessionBadge extends StatelessWidget {
         border: Border.all(color: RttyTheme.border),
       ),
       child: Text(
-        'SID  ${sessionId ?? '—'}',
+        'SID ${sessionId ?? '—'}${resumed ? ' · RESUMED' : ' · NEW'}',
         style: const TextStyle(
           color: RttyTheme.textDim,
           fontSize: 11,

desktop/lib/src/rtty_pty_backend.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:convert';
+import 'dart:math' as math;
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter_alacritty/flutter_alacritty.dart';
@@ -9,6 +10,21 @@ import 'package:web_socket_channel/web_socket_channel.dart';
 /// 连接状态。
 enum ConnState { disconnected, connecting, connected, error }
 
+/// 一次连接的参数（断线重连时复用）。
+class _ConnectParams {
+  const _ConnectParams({
+    required this.host,
+    required this.port,
+    this.session,
+    this.token,
+  });
+
+  final String host;
+  final int port;
+  final String? session;
+  final String? token;
+}
+
 /// 将 Rtty Rust 服务端桥接为 flutter_alacritty 的 [PtyBackend]。
 ///
 /// 这正是该库为远程（WebSocket/SSH）数据源预留的扩展点：
@@ -16,6 +32,10 @@ enum ConnState { disconnected, connecting, connected, error }
 /// - [write]：把引擎产生的输入字节发回服务端写入远端 PTY；
 /// - [resize]：同步终端尺寸到服务端；
 /// - [exitCode]：服务端会话结束时完成。
+///
+/// 额外能力：
+/// - 断线自动重连（指数退避），重连成功后服务端会重放全屏，画面无缝恢复；
+/// - 每 30s 发送一次心跳，保持连接活跃并探测服务端存活。
 class RttyPtyBackend implements PtyBackend {
   RttyPtyBackend();
 
@@ -32,11 +52,25 @@ class RttyPtyBackend implements PtyBackend {
   String? _sessionId;
   String? get sessionId => _sessionId;
 
+  /// 是否恢复了已存在的会话（false = 本次连接新建了会话）。
+  bool _resumed = false;
+  bool get resumed => _resumed;
+
   String? _error;
   String? get error => _error;
 
-  /// 就绪回调（收到 ready 帧，携带会话 ID 与初始尺寸）。
+  /// 用户主动断开/关闭：不再自动重连。
-  void Function(String id, int cols, int rows)? onReady;
+  bool _manualClose = true;
+  /// 不可恢复错误（鉴权失败 / 会话结束）：不再自动重连。
+  bool _fatal = false;
+
+  int _reconnectAttempts = 0;
+  Timer? _reconnectTimer;
+  Timer? _pingTimer;
+  _ConnectParams? _params;
+
+  /// 就绪回调（收到 ready 帧，携带会话 ID、初始尺寸与恢复标记）。
+  void Function(String id, int cols, int rows, bool resumed)? onReady;
 
   /// 状态变化回调。
   void Function(ConnState state)? onStateChanged;
@@ -55,38 +89,83 @@ class RttyPtyBackend implements PtyBackend {
     required String host,
     required int port,
     String? session,
+    String? token,
   }) async {
     await close();
-
+    _manualClose = false;
+    _fatal = false;
+    _reconnectAttempts = 0;
+    _params = _ConnectParams(host: host, port: port, session: session, token: token);
     _setState(ConnState.connecting);
     _error = null;
+    _openChannel();
+  }
 
-    final query = (session != null && session.isNotEmpty)
+  void _openChannel() {
-        ? '?session=${Uri.encodeQueryComponent(session)}&client=desktop'
+    final p = _params;
-        : '?client=desktop';
+    if (p == null || _manualClose || _fatal) return;
-    final uri = Uri.parse('ws://$host:$port/ws$query');
+
+    final query = StringBuffer('?client=desktop');
+    if (p.token != null && p.token!.isNotEmpty) {
+      query.write('&token=${Uri.encodeQueryComponent(p.token!)}');
+    }
+    if (p.session != null && p.session!.isNotEmpty) {
+      query.write('&session=${Uri.encodeQueryComponent(p.session!)}');
+    }
+    final uri = Uri.parse('ws://${p.host}:${p.port}/ws$query');
 
     try {
-      _channel = IOWebSocketChannel.connect(uri);
+      final channel = IOWebSocketChannel.connect(uri);
-      _sub = _channel!.stream.listen(
+      _channel = channel;
+      _sub = channel.stream.listen(
         _handleIncoming,
         onError: (Object e) {
           _error = e.toString();
           _setState(ConnState.error);
+          _scheduleReconnect();
         },
-        onDone: () {
+        onDone: _handleDone,
-          if (!_exitCodeCtl.isCompleted) _exitCodeCtl.complete(0);
-          if (_state == ConnState.connected) _setState(ConnState.disconnected);
-        },
       );
-      _setState(ConnState.connected);
+      // 收到 ready 帧后才转 connected；期间保持 connecting。
+      _startPing();
     } catch (e) {
       _error = e.toString();
-      if (!_exitCodeCtl.isCompleted) _exitCodeCtl.complete(1);
       _setState(ConnState.error);
+      _scheduleReconnect();
     }
   }
 
+  /// 连接被对端关闭（或底层错误）后的统一出口。
+  void _handleDone() {
+    _stopPing();
+    if (_manualClose) {
+      if (_state == ConnState.connected) _setState(ConnState.disconnected);
+      return;
+    }
+    if (_fatal) {
+      if (!_exitCodeCtl.isCompleted) _exitCodeCtl.complete(1);
+      if (_state != ConnState.error) _setState(ConnState.error);
+      return;
+    }
+    // 网络断开：进入指数退避重连。
+    if (_state != ConnState.disconnected) _setState(ConnState.disconnected);
+    _scheduleReconnect();
+  }
+
+  /// 指数退避重连：500ms → 1s → 2s → …，上限 10s；收到 ready 后重置。
+  void _scheduleReconnect() {
+    if (_manualClose || _fatal) return;
+    _reconnectTimer?.cancel();
+    final backoffMs =
+        math.min(500 * (1 << math.min(_reconnectAttempts, 5)), 10000);
+    _reconnectAttempts++;
+    _reconnectTimer = Timer(Duration(milliseconds: backoffMs), () {
+      if (_manualClose || _fatal) return;
+      _setState(ConnState.connecting);
+      _openChannel();
+    });
+  }
+
   void _handleIncoming(dynamic message) {
     if (message is List<int>) {
       // PC 端原始 ANSI 字节流 → 喂给引擎渲染。
@@ -108,15 +187,25 @@ class RttyPtyBackend implements PtyBackend {
     switch (decoded['type']) {
       case 'ready':
         _sessionId = decoded['id'] as String? ?? '';
+        _resumed = decoded['resumed'] == true;
         final cols = (decoded['cols'] as num?)?.toInt() ?? 80;
         final rows = (decoded['rows'] as num?)?.toInt() ?? 24;
+        _reconnectAttempts = 0; // 重连成功，重置退避。
         _setState(ConnState.connected);
-        onReady?.call(_sessionId ?? '', cols, rows);
+        onReady?.call(_sessionId ?? '', cols, rows, _resumed);
       case 'mobile_snapshot':
         // 桌面端使用原始 ANSI 渲染，忽略语义化快照。
         break;
+      case 'pong':
+        // 心跳应答，无需处理。
+        break;
       case 'error':
+        _error = decoded['message'] as String? ?? 'server error';
+        _fatal = true; // 鉴权失败等不可恢复错误，不再重连。
+        if (!_exitCodeCtl.isCompleted) _exitCodeCtl.complete(1);
+        _setState(ConnState.error);
       case 'session_closed':
+        _fatal = true; // 会话已结束，不再重连。
         if (!_exitCodeCtl.isCompleted) _exitCodeCtl.complete(0);
         _setState(ConnState.disconnected);
       default:
@@ -127,10 +216,8 @@ class RttyPtyBackend implements PtyBackend {
   @override
   void write(Uint8List data) {
     if (_state != ConnState.connected || _channel == null) return;
-    _channel!.sink.add(jsonEncode({
+    // 二进制帧原样透传：避免经 UTF-8 字符串中转时损坏任意字节序列。
-      'type': 'input',
+    _channel!.sink.add(data);
-      'data': utf8.decode(data, allowMalformed: true),
-    }));
   }
 
   @override
@@ -145,15 +232,39 @@ class RttyPtyBackend implements PtyBackend {
     close();
   }
 
-  /// 关闭连接并释放资源。
+  /// 用户主动关闭连接并释放资源。
   Future<void> close() async {
+    _manualClose = true;
+    _fatal = false;
+    _reconnectTimer?.cancel();
+    _reconnectTimer = null;
+    _stopPing();
+    await _teardownChannel();
+    _sessionId = null;
+    _resumed = false;
+    if (!_exitCodeCtl.isCompleted) _exitCodeCtl.complete(0);
+    if (_state != ConnState.disconnected) _setState(ConnState.disconnected);
+  }
+
+  Future<void> _teardownChannel() async {
     await _sub?.cancel();
     _sub = null;
     await _channel?.sink.close();
     _channel = null;
-    _sessionId = null;
+  }
-    if (!_exitCodeCtl.isCompleted) _exitCodeCtl.complete(0);
+
-    if (_state != ConnState.disconnected) _setState(ConnState.disconnected);
+  void _startPing() {
+    _stopPing();
+    _pingTimer = Timer.periodic(const Duration(seconds: 30), (_) {
+      if (_state == ConnState.connected && _channel != null) {
+        _channel!.sink.add(jsonEncode({'type': 'ping'}));
+      }
+    });
+  }
+
+  void _stopPing() {
+    _pingTimer?.cancel();
+    _pingTimer = null;
   }
 
   void _setState(ConnState state) {

desktop/lib/src/terminal_screen.dart

@@ -38,10 +38,12 @@ class _TerminalScreenState extends State<TerminalScreen> {
 
   final _host = TextEditingController(text: '127.0.0.1');
   final _port = TextEditingController(text: '8080');
+  final _token = TextEditingController();
   final _session = TextEditingController();
 
   ConnState _state = ConnState.disconnected;
   String? _sessionId;
+  bool _resumed = false;
   int _cols = 0;
   int _rows = 0;
 
@@ -56,6 +58,7 @@ class _TerminalScreenState extends State<TerminalScreen> {
     _tearDownSession();
     _host.dispose();
     _port.dispose();
+    _token.dispose();
     _session.dispose();
     _controller.dispose();
     _focus.dispose();
@@ -65,6 +68,7 @@ class _TerminalScreenState extends State<TerminalScreen> {
   Future<void> _connect() async {
     final host = _host.text.trim();
     final port = int.tryParse(_port.text.trim()) ?? 8080;
+    final token = _token.text.trim();
     final session = _session.text.trim();
     if (host.isEmpty) return;
 
@@ -91,16 +95,17 @@ class _TerminalScreenState extends State<TerminalScreen> {
         _sessionId = null;
       }
     };
-    backend.onReady = (id, cols, rows) {
+    backend.onReady = (id, cols, rows, resumed) {
       if (!mounted) return;
       setState(() {
         _sessionId = id;
+        _resumed = resumed;
         _cols = cols;
         _rows = rows;
       });
     };
 
-    await backend.connect(host: host, port: port, session: session);
+    await backend.connect(host: host, port: port, session: session, token: token);
   }
 
   void _disconnect() => _tearDownSession();
@@ -124,6 +129,7 @@ class _TerminalScreenState extends State<TerminalScreen> {
     _engine?.dispose();
     _engine = null;
     _sessionId = null;
+    _resumed = false;
     _state = ConnState.disconnected;
   }
 
@@ -158,8 +164,10 @@ class _TerminalScreenState extends State<TerminalScreen> {
             state: _state,
             hostController: _host,
             portController: _port,
+            tokenController: _token,
             sessionController: _session,
             sessionId: _sessionId,
+            resumed: _resumed,
             terminalSize: sizeText,
             onConnect: _connect,
             onDisconnect: _disconnect,

desktop/test/e2e_ws_test.dart

@@ -25,7 +25,8 @@ void main() {
     String? sessionId;
     final raw = StringBuffer();
     backend.onStateChanged = (s) => states.add(s);
-    backend.onReady = (id, cols, rows) => sessionId = '$id:$cols:$rows';
+    backend.onReady = (id, cols, rows, resumed) =>
+        sessionId = '$id:$cols:$rows:$resumed';
     backend.output.listen((Uint8List b) {
       raw.write(String.fromCharCodes(b));
     });

mobile/.gitignore

@@ -0,0 +1,45 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.build/
+.buildlog/
+.history
+.svn/
+.swiftpm/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins-dependencies
+.pub-cache/
+.pub/
+/build/
+/coverage/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release

mobile/.metadata

@@ -0,0 +1,33 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "ad70ec4617166f1c38e5d2bfd388af71fda14f06"
+  channel: "stable"
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: ad70ec4617166f1c38e5d2bfd388af71fda14f06
+      base_revision: ad70ec4617166f1c38e5d2bfd388af71fda14f06
+    - platform: android
+      create_revision: ad70ec4617166f1c38e5d2bfd388af71fda14f06
+      base_revision: ad70ec4617166f1c38e5d2bfd388af71fda14f06
+    - platform: ios
+      create_revision: ad70ec4617166f1c38e5d2bfd388af71fda14f06
+      base_revision: ad70ec4617166f1c38e5d2bfd388af71fda14f06
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

mobile/README.md

@@ -0,0 +1,17 @@
+# rtty_mobile
+
+A new Flutter project.
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Learn Flutter](https://docs.flutter.dev/get-started/learn-flutter)
+- [Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
+- [Flutter learning resources](https://docs.flutter.dev/reference/learning-resources)
+
+For help getting started with Flutter development, view the
+[online documentation](https://docs.flutter.dev/), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.

mobile/analysis_options.yaml

@@ -0,0 +1,28 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at https://dart.dev/lints.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

mobile/android/.gitignore

@@ -0,0 +1,14 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+.cxx/
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/to/reference-keystore
+key.properties
+**/*.keystore
+**/*.jks

mobile/android/app/build.gradle.kts

@@ -0,0 +1,45 @@
+plugins {
+    id("com.android.application")
+    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
+    id("dev.flutter.flutter-gradle-plugin")
+}
+
+android {
+    namespace = "com.example.rtty_mobile"
+    compileSdk = flutter.compileSdkVersion
+    ndkVersion = flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId = "com.example.rtty_mobile"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://flutter.dev/to/review-gradle-config.
+        minSdk = flutter.minSdkVersion
+        targetSdk = flutter.targetSdkVersion
+        versionCode = flutter.versionCode
+        versionName = flutter.versionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig = signingConfigs.getByName("debug")
+        }
+    }
+}
+
+kotlin {
+    compilerOptions {
+        jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17
+    }
+}
+
+flutter {
+    source = "../.."
+}

mobile/android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

mobile/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,48 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- 访问服务端 WebSocket 需要网络权限。 -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <application
+        android:label="rtty_mobile"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher"
+        android:usesCleartextTraffic="true">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:taskAffinity=""
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+    <!-- Required to query activities that can process text, see:
+         https://developer.android.com/training/package-visibility and
+         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
+
+         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.PROCESS_TEXT"/>
+            <data android:mimeType="text/plain"/>
+        </intent>
+    </queries>
+</manifest>

mobile/android/app/src/main/kotlin/com/example/rtty_mobile/MainActivity.kt

@@ -0,0 +1,5 @@
+package com.example.rtty_mobile
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity : FlutterActivity()

mobile/android/app/src/main/res/drawable-v21/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

mobile/android/app/src/main/res/drawable/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

mobile/android/app/src/main/res/values-night/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

mobile/android/app/src/main/res/values/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

mobile/android/app/src/profile/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

mobile/android/build.gradle.kts

@@ -0,0 +1,24 @@
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+val newBuildDir: Directory =
+    rootProject.layout.buildDirectory
+        .dir("../../build")
+        .get()
+rootProject.layout.buildDirectory.value(newBuildDir)
+
+subprojects {
+    val newSubprojectBuildDir: Directory = newBuildDir.dir(project.name)
+    project.layout.buildDirectory.value(newSubprojectBuildDir)
+}
+subprojects {
+    project.evaluationDependsOn(":app")
+}
+
+tasks.register<Delete>("clean") {
+    delete(rootProject.layout.buildDirectory)
+}

mobile/android/gradle.properties

@@ -0,0 +1,6 @@
+org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
+android.useAndroidX=true
+# This newDsl flag was added by the Flutter template
+android.newDsl=false
+# This builtInKotlin flag was added by the Flutter template
+android.builtInKotlin=false

mobile/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-all.zip

mobile/android/settings.gradle.kts

@@ -0,0 +1,26 @@
+pluginManagement {
+    val flutterSdkPath =
+        run {
+            val properties = java.util.Properties()
+            file("local.properties").inputStream().use { properties.load(it) }
+            val flutterSdkPath = properties.getProperty("flutter.sdk")
+            require(flutterSdkPath != null) { "flutter.sdk not set in local.properties" }
+            flutterSdkPath
+        }
+
+    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
+
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+plugins {
+    id("dev.flutter.flutter-plugin-loader") version "1.0.0"
+    id("com.android.application") version "9.0.1" apply false
+    id("org.jetbrains.kotlin.android") version "2.3.20" apply false
+}
+
+include(":app")

mobile/ios/.gitignore

@@ -0,0 +1,34 @@
+**/dgph
+*.mode1v3
+*.mode2v3
+*.moved-aside
+*.pbxuser
+*.perspectivev3
+**/*sync/
+.sconsign.dblite
+.tags*
+**/.vagrant/
+**/DerivedData/
+Icon?
+**/Pods/
+**/.symlinks/
+profile
+xcuserdata
+**/.generated/
+Flutter/App.framework
+Flutter/Flutter.framework
+Flutter/Flutter.podspec
+Flutter/Generated.xcconfig
+Flutter/ephemeral/
+Flutter/app.flx
+Flutter/app.zip
+Flutter/flutter_assets/
+Flutter/flutter_export_environment.sh
+ServiceDefinitions.json
+Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!default.mode1v3
+!default.mode2v3
+!default.pbxuser
+!default.perspectivev3

mobile/ios/Flutter/AppFrameworkInfo.plist

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+</dict>
+</plist>

mobile/ios/Flutter/Debug.xcconfig

@@ -0,0 +1 @@
+#include "Generated.xcconfig"

mobile/ios/Flutter/Release.xcconfig

@@ -0,0 +1 @@
+#include "Generated.xcconfig"

mobile/ios/Runner.xcodeproj/project.pbxproj

@@ -0,0 +1,644 @@
+// !$*UTF8*$!
+{
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+/* End PBXCopyFilesBuildPhase section */
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+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
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+/* End PBXFrameworksBuildPhase section */
+
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+			);
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+			isa = PBXGroup;
+			children = (
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+				7AFA3C8E1D35360C0083082E /* Release.xcconfig */,
+				9740EEB31CF90195004384FC /* Generated.xcconfig */,
+			);
+			name = Flutter;
+			sourceTree = "<group>";
+		};
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+			isa = PBXGroup;
+			children = (
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+				331C8082294A63A400263BE5 /* RunnerTests */,
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+			isa = PBXGroup;
+			children = (
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+		};
+		97C146F01CF9000F007C117D /* Runner */ = {
+			isa = PBXGroup;
+			children = (
+				97C146FA1CF9000F007C117D /* Main.storyboard */,
+				97C146FD1CF9000F007C117D /* Assets.xcassets */,
+				97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */,
+				97C147021CF9000F007C117D /* Info.plist */,
+				1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */,
+				1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */,
+				74858FAE1ED2DC5600515810 /* AppDelegate.swift */,
+				7884E8672EC3CC0400C636F2 /* SceneDelegate.swift */,
+				74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */,
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+		};
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+				331C807F294A63A400263BE5 /* Resources */,
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+				331C8086294A63A400263BE5 /* PBXTargetDependency */,
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+}

mobile/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>

mobile/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

mobile/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

mobile/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -0,0 +1,119 @@
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+<Scheme
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+   version = "1.3">
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+      buildImplicitDependencies = "YES">
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+            <ActionContent
+               title = "Run Prepare Flutter Framework Script"
+               scriptText = "/bin/sh &quot;$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh&quot; prepare&#10;">
+               <EnvironmentBuildable>
+                  <BuildableReference
+                     BuildableIdentifier = "primary"
+                     BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+                     BuildableName = "Runner.app"
+                     BlueprintName = "Runner"
+                     ReferencedContainer = "container:Runner.xcodeproj">
+                  </BuildableReference>
+               </EnvironmentBuildable>
+            </ActionContent>
+         </ExecutionAction>
+      </PreActions>
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
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+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+               BuildableName = "Runner.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
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+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
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+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "331C8080294A63A400263BE5"
+               BuildableName = "RunnerTests.xctest"
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+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      enableGPUValidationMode = "1"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

mobile/ios/Runner.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+</Workspace>

mobile/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

mobile/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

mobile/ios/Runner/AppDelegate.swift

@@ -0,0 +1,16 @@
+import Flutter
+import UIKit
+
+@main
+@objc class AppDelegate: FlutterAppDelegate, FlutterImplicitEngineDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+
+  func didInitializeImplicitFlutterEngine(_ engineBridge: FlutterImplicitEngineBridge) {
+    GeneratedPluginRegistrant.register(with: engineBridge.pluginRegistry)
+  }
+}

mobile/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,122 @@
+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "83.5x83.5",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-83.5x83.5@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "Icon-App-1024x1024@1x.png",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

mobile/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

mobile/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md

@@ -0,0 +1,5 @@
+# Launch Screen Assets
+
+You can customize the launch screen with your own desired assets by replacing the image files in this directory.
+
+You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.

mobile/ios/Runner/Base.lproj/LaunchScreen.storyboard

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
+                        <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="1a2-6s-vTC"/>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="4X2-HB-R7a"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="LaunchImage" width="168" height="185"/>
+    </resources>
+</document>

mobile/ios/Runner/Base.lproj/Main.storyboard

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
+    </dependencies>
+    <scenes>
+        <!--Flutter View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
+                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>

mobile/ios/Runner/Info.plist

@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>Rtty Mobile</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>rtty_mobile</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIApplicationSceneManifest</key>
+	<dict>
+		<key>UIApplicationSupportsMultipleScenes</key>
+		<false/>
+		<key>UISceneConfigurations</key>
+		<dict>
+			<key>UIWindowSceneSessionRoleApplication</key>
+			<array>
+				<dict>
+					<key>UISceneClassName</key>
+					<string>UIWindowScene</string>
+					<key>UISceneConfigurationName</key>
+					<string>flutter</string>
+					<key>UISceneDelegateClassName</key>
+					<string>$(PRODUCT_MODULE_NAME).SceneDelegate</string>
+					<key>UISceneStoryboardFile</key>
+					<string>Main</string>
+				</dict>
+			</array>
+		</dict>
+	</dict>
+	<key>UIApplicationSupportsIndirectInputEvents</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

mobile/ios/Runner/Runner-Bridging-Header.h

@@ -0,0 +1 @@
+#import "GeneratedPluginRegistrant.h"

mobile/ios/Runner/SceneDelegate.swift

@@ -0,0 +1,6 @@
+import Flutter
+import UIKit
+
+class SceneDelegate: FlutterSceneDelegate {
+
+}

mobile/ios/RunnerTests/RunnerTests.swift

@@ -0,0 +1,12 @@
+import Flutter
+import UIKit
+import XCTest
+
+class RunnerTests: XCTestCase {
+
+  func testExample() {
+    // If you add code to the Runner application, consider adding tests here.
+    // See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+  }
+
+}

mobile/lib/main.dart

@@ -0,0 +1,452 @@
+import 'package:flutter/material.dart';
+
+import 'src/rtty_mobile_client.dart';
+import 'src/theme.dart';
+
+void main() {
+  runApp(const RttyMobileApp());
+}
+
+class RttyMobileApp extends StatelessWidget {
+  const RttyMobileApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Rtty Mobile',
+      debugShowCheckedModeBanner: false,
+      theme: RttyMobileTheme.app(),
+      home: const TerminalPage(),
+    );
+  }
+}
+
+/// 最小验证页：连接 Rtty 服务端，消费语义化快照实时显示终端内容，
+/// 并支持输入命令 + 常用按键（ESC/TAB/Ctrl/方向键）做端到端同步验证。
+class TerminalPage extends StatefulWidget {
+  const TerminalPage({super.key});
+
+  @override
+  State<TerminalPage> createState() => _TerminalPageState();
+}
+
+class _TerminalPageState extends State<TerminalPage> {
+  final RttyMobileClient _client = RttyMobileClient();
+  final TextEditingController _serverCtrl = TextEditingController();
+  final TextEditingController _tokenCtrl = TextEditingController();
+  final TextEditingController _sessionCtrl = TextEditingController();
+  final TextEditingController _inputCtrl = TextEditingController();
+  final ScrollController _scrollCtrl = ScrollController();
+
+  ConnState _state = ConnState.disconnected;
+  String? _sessionId;
+  bool _resumed = false;
+  List<String> _lines = const [];
+  int _cursorX = 0;
+  int _cursorY = 0;
+
+  /// 终端行高（逻辑像素），与 [_buildLine] 的字号/行高保持一致，
+  /// 用于“让光标行保持可见”的滚动计算。
+  static const double _lineHeight = 17.0;
+
+  /// 常用按键：标签 -> 发送到 PTY 的字节序列。
+  static const List<(String, String)> _quickKeys = [
+    ('ESC', '\x1b'),
+    ('TAB', '\t'),
+    ('CTRL+C', '\x03'),
+    ('CTRL+L', '\x0c'),
+    ('↑', '\x1b[A'),
+    ('↓', '\x1b[B'),
+    ('←', '\x1b[D'),
+    ('→', '\x1b[C'),
+  ];
+
+  @override
+  void initState() {
+    super.initState();
+    _client.onStateChanged = _onStateChanged;
+    _client.onReady = (id, cols, rows, resumed) {
+      if (!mounted) return;
+      setState(() {
+        _sessionId = id;
+        _resumed = resumed;
+        _state = ConnState.connected;
+      });
+    };
+    _client.onSnapshot = _onSnapshot;
+    _client.onSessionClosed = () {
+      if (!mounted) return;
+      setState(() => _state = ConnState.disconnected);
+    };
+  }
+
+  @override
+  void dispose() {
+    _client.disconnect();
+    _serverCtrl.dispose();
+    _tokenCtrl.dispose();
+    _sessionCtrl.dispose();
+    _inputCtrl.dispose();
+    _scrollCtrl.dispose();
+    super.dispose();
+  }
+
+  void _onStateChanged(ConnState s) {
+    if (!mounted) return;
+    setState(() {
+      _state = s;
+      if (s == ConnState.disconnected || s == ConnState.error) {
+        _sessionId = null;
+        _resumed = false;
+      }
+    });
+  }
+
+  void _onSnapshot(Snapshot snap) {
+    if (!mounted) return;
+    setState(() {
+      _lines = snap.lines;
+      _cursorX = snap.cursorX;
+      _cursorY = snap.cursorY;
+    });
+    // 终端语义：让光标行始终可见（尽量靠近视口底部），而不是盲目滚到
+    // 列表末尾——网格下半部分通常是空行，滚到底会把内容顶出屏幕。
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (!_scrollCtrl.hasClients) return;
+      final viewport = _scrollCtrl.position.viewportDimension;
+      final max = _scrollCtrl.position.maxScrollExtent;
+      final target = ((_cursorY + 1) * _lineHeight) - viewport;
+      _scrollCtrl.jumpTo(target.clamp(0.0, max));
+    });
+  }
+
+  (String, int) _parseServer() {
+    final raw = _serverCtrl.text.trim();
+    if (raw.isEmpty) return ('', 8080);
+    final idx = raw.lastIndexOf(':');
+    if (idx <= 0) return (raw, 8080);
+    final port = int.tryParse(raw.substring(idx + 1)) ?? 8080;
+    return (raw.substring(0, idx), port);
+  }
+
+  Future<void> _connect() async {
+    final (host, port) = _parseServer();
+    if (host.isEmpty) {
+      _showSnack('请输入服务端地址，如 192.168.1.100:8080');
+      return;
+    }
+    setState(() => _state = ConnState.connecting);
+    await _client.connect(
+      host: host,
+      port: port,
+      session:
+          _sessionCtrl.text.trim().isEmpty ? null : _sessionCtrl.text.trim(),
+      token: _tokenCtrl.text.trim().isEmpty ? null : _tokenCtrl.text.trim(),
+    );
+  }
+
+  Future<void> _disconnect() async {
+    await _client.disconnect();
+  }
+
+  void _send(String data) {
+    if (!_client.isConnected) return;
+    _client.sendInput(data);
+  }
+
+  void _sendLine() {
+    if (_inputCtrl.text.isEmpty) return;
+    _send('${_inputCtrl.text}\r');
+    _inputCtrl.clear();
+  }
+
+  void _showSnack(String msg) {
+    if (!mounted) return;
+    ScaffoldMessenger.of(context)
+        .showSnackBar(SnackBar(content: Text(msg), duration: const Duration(seconds: 2)));
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final connected = _client.isConnected;
+    return Scaffold(
+      body: SafeArea(
+        child: Column(
+          children: [
+            _buildConnectionPanel(connected),
+            const Divider(height: 1, color: RttyMobileTheme.border),
+            Expanded(child: _buildTerminal()),
+            _buildKeybar(connected),
+            _buildInputRow(connected),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildConnectionPanel(bool connected) {
+    return Padding(
+      padding: const EdgeInsets.fromLTRB(12, 12, 12, 8),
+      child: Column(
+        children: [
+          Row(
+            children: [
+              Expanded(
+                child: TextField(
+                  controller: _serverCtrl,
+                  enabled: !connected,
+                  style: const TextStyle(fontFamily: 'monospace', fontSize: 14),
+                  decoration: const InputDecoration(
+                    labelText: 'SERVER',
+                    hintText: '192.168.1.100:8080',
+                    isDense: true,
+                  ),
+                ),
+              ),
+              const SizedBox(width: 8),
+              SizedBox(
+                width: 110,
+                child: TextField(
+                  controller: _tokenCtrl,
+                  enabled: !connected,
+                  obscureText: true,
+                  style: const TextStyle(fontFamily: 'monospace', fontSize: 14),
+                  decoration: const InputDecoration(
+                    labelText: 'TOKEN',
+                    hintText: '可选',
+                    isDense: true,
+                  ),
+                ),
+              ),
+              const SizedBox(width: 8),
+              FilledButton(
+                onPressed: connected ? _disconnect : _connect,
+                style: FilledButton.styleFrom(
+                  backgroundColor: connected
+                      ? RttyMobileTheme.danger
+                      : RttyMobileTheme.primary,
+                  foregroundColor: connected
+                      ? Colors.white
+                      : RttyMobileTheme.background,
+                ),
+                child: Text(connected ? '断开' : '连接'),
+              ),
+            ],
+          ),
+          const SizedBox(height: 8),
+          Row(
+            children: [
+              Expanded(
+                child: TextField(
+                  controller: _sessionCtrl,
+                  enabled: !connected,
+                  style: const TextStyle(fontFamily: 'monospace', fontSize: 14),
+                  decoration: const InputDecoration(
+                    labelText: 'SESSION',
+                    hintText: '留空自动新建',
+                    isDense: true,
+                  ),
+                ),
+              ),
+              const SizedBox(width: 8),
+              Expanded(child: _buildStatus()),
+            ],
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildStatus() {
+    final stateText = switch (_state) {
+      ConnState.disconnected => '未连接',
+      ConnState.connecting => '连接中…',
+      ConnState.connected => '已连接',
+      ConnState.error => '连接失败',
+    };
+    final color = switch (_state) {
+      ConnState.connected => RttyMobileTheme.primary,
+      ConnState.connecting => RttyMobileTheme.accent,
+      ConnState.error => RttyMobileTheme.danger,
+      ConnState.disconnected => RttyMobileTheme.textFaint,
+    };
+    final session = (_sessionId == null || _sessionId!.isEmpty)
+        ? ''
+        : ' · ${_resumed ? '恢复' : '新建'}:$_sessionId';
+    final err = (_state == ConnState.error && _client.error != null)
+        ? '\n${_client.error}'
+        : '';
+    return Text(
+      '$stateText$session$err',
+      maxLines: 2,
+      overflow: TextOverflow.ellipsis,
+      style: TextStyle(
+        color: color,
+        fontSize: 12,
+        fontFamily: 'monospace',
+      ),
+    );
+  }
+
+  Widget _buildTerminal() {
+    if (!_client.isConnected) {
+      final (title, sub) = switch (_state) {
+        ConnState.error => (
+            '连接失败',
+            _client.error ?? '请检查地址、令牌与服务端是否启动',
+          ),
+        ConnState.connecting => ('连接中', '正在协商 WebSocket 会话…'),
+        _ => ('未连接', '输入服务端地址后点击「连接」'),
+      };
+      return Center(
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Icon(
+              Icons.terminal,
+              size: 48,
+              color: _state == ConnState.error
+                  ? RttyMobileTheme.danger
+                  : RttyMobileTheme.textFaint,
+            ),
+            const SizedBox(height: 12),
+            Text(title,
+                style: TextStyle(
+                    color: RttyMobileTheme.textDim,
+                    fontSize: 16,
+                    fontWeight: FontWeight.w600)),
+            const SizedBox(height: 6),
+            Text(sub,
+                textAlign: TextAlign.center,
+                style: const TextStyle(
+                    color: RttyMobileTheme.textFaint, fontSize: 12)),
+          ],
+        ),
+      );
+    }
+    return Container(
+      color: RttyMobileTheme.background,
+      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 8),
+      child: ListView.builder(
+        controller: _scrollCtrl,
+        itemCount: _lines.length,
+        itemBuilder: (context, i) => _buildLine(i),
+      ),
+    );
+  }
+
+  Widget _buildLine(int index) {
+    final line = index < _lines.length ? _lines[index] : '';
+    final mono = const TextStyle(
+      fontFamily: 'monospace',
+      fontSize: 13,
+      height: 1.25,
+      color: RttyMobileTheme.text,
+    );
+    if (index != _cursorY) {
+      return SizedBox(height: _lineHeight, child: Text(line, style: mono));
+    }
+
+    // 光标行：用高亮色块标出光标位置。
+    final x = _cursorX.clamp(0, line.length);
+    return SizedBox(
+      height: _lineHeight,
+      child: Text.rich(
+        TextSpan(
+          style: mono,
+          children: [
+            TextSpan(text: line.substring(0, x)),
+            if (x < line.length)
+              TextSpan(
+                text: line[x],
+                style: const TextStyle(
+                  color: RttyMobileTheme.background,
+                  backgroundColor: RttyMobileTheme.primary,
+                ),
+              )
+            else
+              const TextSpan(
+                text: ' ',
+                style: TextStyle(backgroundColor: RttyMobileTheme.primary),
+              ),
+            if (x + 1 < line.length) TextSpan(text: line.substring(x + 1)),
+          ],
+        ),
+      ),
+    );
+  }
+
+  Widget _buildKeybar(bool connected) {
+    return Padding(
+      padding: const EdgeInsets.fromLTRB(12, 8, 12, 0),
+      child: Wrap(
+        spacing: 6,
+        runSpacing: 6,
+        children: [
+          for (final (label, seq) in _quickKeys)
+            _KeyButton(
+              label: label,
+              onTap: connected ? () => _send(seq) : null,
+            ),
+        ],
+      ),
+    );
+  }
+
+  Widget _buildInputRow(bool connected) {
+    return Padding(
+      padding: const EdgeInsets.fromLTRB(12, 8, 12, 12),
+      child: Row(
+        children: [
+          Expanded(
+            child: TextField(
+              controller: _inputCtrl,
+              enabled: connected,
+              style: const TextStyle(fontFamily: 'monospace', fontSize: 14),
+              textInputAction: TextInputAction.send,
+              onSubmitted: (_) => _sendLine(),
+              decoration: const InputDecoration(
+                hintText: '输入命令，回车发送',
+                isDense: true,
+              ),
+            ),
+          ),
+          const SizedBox(width: 8),
+          FilledButton(
+            onPressed: connected ? _sendLine : null,
+            child: const Text('发送'),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class _KeyButton extends StatelessWidget {
+  const _KeyButton({required this.label, this.onTap});
+
+  final String label;
+  final VoidCallback? onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      height: 30,
+      child: OutlinedButton(
+        onPressed: onTap,
+        style: OutlinedButton.styleFrom(
+          padding: const EdgeInsets.symmetric(horizontal: 10),
+          side: BorderSide(
+            color: onTap == null
+                ? RttyMobileTheme.border
+                : RttyMobileTheme.primaryDim,
+          ),
+          foregroundColor:
+              onTap == null ? RttyMobileTheme.textFaint : RttyMobileTheme.primary,
+          textStyle: const TextStyle(fontSize: 11, fontFamily: 'monospace'),
+        ),
+        child: Text(label),
+      ),
+    );
+  }
+}

mobile/lib/src/rtty_mobile_client.dart

@@ -0,0 +1,220 @@
+import 'dart:async';
+import 'dart:convert';
+
+import 'package:web_socket_channel/io.dart';
+import 'package:web_socket_channel/web_socket_channel.dart';
+
+/// 连接状态。
+enum ConnState { disconnected, connecting, connected, error }
+
+/// 语义化屏显快照（对应服务端 `MobileSnapshot`）。
+class Snapshot {
+  const Snapshot({
+    required this.cursorX,
+    required this.cursorY,
+    required this.cols,
+    required this.rows,
+    required this.displayOffset,
+    required this.scrollbackLines,
+    required this.lines,
+  });
+
+  final int cursorX;
+  final int cursorY;
+  final int cols;
+  final int rows;
+  final int displayOffset;
+  final int scrollbackLines;
+  final List<String> lines;
+
+  factory Snapshot.fromJson(Map<String, dynamic> json) {
+    return Snapshot(
+      cursorX: (json['cursor_x'] as num?)?.toInt() ?? 0,
+      cursorY: (json['cursor_y'] as num?)?.toInt() ?? 0,
+      cols: (json['cols'] as num?)?.toInt() ?? 0,
+      rows: (json['rows'] as num?)?.toInt() ?? 0,
+      displayOffset: (json['display_offset'] as num?)?.toInt() ?? 0,
+      scrollbackLines: (json['scrollback_lines'] as num?)?.toInt() ?? 0,
+      lines: ((json['lines'] as List?) ?? const [])
+          .map((l) => l.toString())
+          .toList(),
+    );
+  }
+}
+
+/// 移动端语义化客户端。
+///
+/// 连接 Rtty 服务端，消费 `mobile_snapshot` 语义化快照（已去 ANSI、按行切分），
+/// 并把用户输入 / resize / 控制权指令发回服务端。
+class RttyMobileClient {
+  WebSocketChannel? _channel;
+  StreamSubscription? _sub;
+
+  ConnState _state = ConnState.disconnected;
+  ConnState get state => _state;
+
+  String? _sessionId;
+  String? get sessionId => _sessionId;
+
+  /// 是否恢复了已存在的会话。
+  bool _resumed = false;
+  bool get resumed => _resumed;
+
+  String? _error;
+  String? get error => _error;
+
+  bool get isConnected => _state == ConnState.connected;
+
+  Timer? _pingTimer;
+
+  /// 状态变化回调。
+  void Function(ConnState state)? onStateChanged;
+
+  /// 就绪回调（会话 ID、初始尺寸、是否恢复既有会话）。
+  void Function(String id, int cols, int rows, bool resumed)? onReady;
+
+  /// 快照回调（每次服务端推送语义化屏显）。
+  void Function(Snapshot snapshot)? onSnapshot;
+
+  /// 会话结束回调。
+  void Function()? onSessionClosed;
+
+  Future<void> connect({
+    required String host,
+    required int port,
+    String? session,
+    String? token,
+  }) async {
+    await disconnect();
+
+    _setState(ConnState.connecting);
+    _error = null;
+
+    // 关键：必须声明 client=mobile，服务端才会推送语义化快照。
+    final query = StringBuffer('?client=mobile');
+    if (token != null && token.isNotEmpty) {
+      query.write('&token=${Uri.encodeQueryComponent(token)}');
+    }
+    if (session != null && session.isNotEmpty) {
+      query.write('&session=${Uri.encodeQueryComponent(session)}');
+    }
+    final uri = Uri.parse('ws://$host:$port/ws$query');
+
+    try {
+      _channel = IOWebSocketChannel.connect(uri);
+      _sub = _channel!.stream.listen(
+        _handleIncoming,
+        onError: (Object e) {
+          _error = e.toString();
+          _setState(ConnState.error);
+        },
+        onDone: () {
+          if (_state == ConnState.connected) {
+            _setState(ConnState.disconnected);
+          }
+        },
+      );
+      _setState(ConnState.connected);
+      _startPing();
+    } catch (e) {
+      _error = e.toString();
+      _setState(ConnState.error);
+    }
+  }
+
+  Future<void> disconnect() async {
+    _stopPing();
+    await _sub?.cancel();
+    _sub = null;
+    await _channel?.sink.close();
+    _channel = null;
+    _sessionId = null;
+    _resumed = false;
+    if (_state != ConnState.disconnected) {
+      _setState(ConnState.disconnected);
+    }
+  }
+
+  void _handleIncoming(dynamic message) {
+    if (message is String) {
+      _handleJsonFrame(message);
+    }
+  }
+
+  void _handleJsonFrame(String text) {
+    final Object? decoded;
+    try {
+      decoded = jsonDecode(text);
+    } catch (_) {
+      return;
+    }
+    if (decoded is! Map<String, dynamic>) return;
+
+    switch (decoded['type']) {
+      case 'ready':
+        _sessionId = decoded['id'] as String? ?? '';
+        _resumed = decoded['resumed'] == true;
+        final cols = (decoded['cols'] as num?)?.toInt() ?? 0;
+        final rows = (decoded['rows'] as num?)?.toInt() ?? 0;
+        _setState(ConnState.connected);
+        onReady?.call(_sessionId ?? '', cols, rows, _resumed);
+        break;
+      case 'mobile_snapshot':
+        final data = decoded['data'];
+        if (data is Map<String, dynamic>) {
+          onSnapshot?.call(Snapshot.fromJson(data));
+        }
+        break;
+      case 'control_response':
+      case 'pong':
+      case 'error':
+        break;
+      case 'session_closed':
+        onSessionClosed?.call();
+        _setState(ConnState.disconnected);
+        break;
+      default:
+        break;
+    }
+  }
+
+  /// 发送原始输入到 PTY。
+  void sendInput(String data) {
+    if (!isConnected || _channel == null) return;
+    _channel!.sink.add(jsonEncode({'type': 'input', 'data': data}));
+  }
+
+  /// 发送 resize。
+  void sendResize(int cols, int rows) {
+    if (!isConnected || _channel == null) return;
+    _channel!.sink.add(
+        jsonEncode({'type': 'resize', 'cols': cols, 'rows': rows}));
+  }
+
+  /// 声明控制权。
+  void claimControl() {
+    if (!isConnected || _channel == null) return;
+    _channel!.sink.add(jsonEncode({'type': 'claim_control'}));
+  }
+
+  void _setState(ConnState state) {
+    if (_state == state) return;
+    _state = state;
+    onStateChanged?.call(state);
+  }
+
+  /// 每 30s 发送一次心跳，保持连接活跃并探测服务端。
+  void _startPing() {
+    _stopPing();
+    _pingTimer = Timer.periodic(const Duration(seconds: 30), (_) {
+      if (isConnected && _channel != null) {
+        _channel!.sink.add(jsonEncode({'type': 'ping'}));
+      }
+    });
+  }
+
+  void _stopPing() {
+    _pingTimer?.cancel();
+    _pingTimer = null;
+  }
+}

mobile/lib/src/theme.dart

@@ -0,0 +1,59 @@
+import 'package:flutter/material.dart';
+
+/// Rtty 移动端主题。
+///
+/// 设计方向：现代终端卡片美学。深靛蓝底 + 霓虹青绿强调色，
+/// 用卡片承载命令与输出，强调可读性与触控友好。
+class RttyMobileTheme {
+  RttyMobileTheme._();
+
+  static const Color background = Color(0xFF0D1117); // 深靛黑
+  static const Color surface = Color(0xFF161C26); // 卡片底
+  static const Color surfaceAlt = Color(0xFF1C2430); // 输入区
+  static const Color border = Color(0xFF2A3442);
+  static const Color primary = Color(0xFF3DDB93); // 霓虹青绿
+  static const Color primaryDim = Color(0xFF176C4B);
+  static const Color accent = Color(0xFFFFB454); // 琥珀
+  static const Color danger = Color(0xFFE5534B);
+  static const Color text = Color(0xFFE2E8F0);
+  static const Color textDim = Color(0xFF93A1B3);
+  static const Color textFaint = Color(0xFF5B6878);
+  static const Color commandTag = Color(0xFF7C5CFF); // 命令标签紫
+
+  static ThemeData app() {
+    final base = ThemeData.dark(useMaterial3: true);
+    return base.copyWith(
+      scaffoldBackgroundColor: background,
+      colorScheme: ColorScheme.dark(
+        primary: primary,
+        secondary: accent,
+        surface: surface,
+        error: danger,
+        onPrimary: const Color(0xFF07130C),
+        onSurface: text,
+      ),
+      textTheme: base.textTheme.copyWith(
+        bodyMedium: base.textTheme.bodyMedium?.copyWith(
+          color: text,
+          fontSize: 15,
+          height: 1.5,
+        ),
+      ),
+      inputDecorationTheme: InputDecorationTheme(
+        filled: true,
+        fillColor: surfaceAlt,
+        hintStyle: const TextStyle(color: textFaint, fontSize: 15),
+        contentPadding:
+            const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
+        border: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(14),
+          borderSide: BorderSide.none,
+        ),
+        focusedBorder: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(14),
+          borderSide: const BorderSide(color: primaryDim, width: 1.5),
+        ),
+      ),
+    );
+  }
+}

mobile/pubspec.lock

@@ -0,0 +1,253 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: e2eb0491ba5ddb6177742d2da23904574082139b07c1e33b8503b9f46f3e1a37
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.13.1"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "8aab1771e1243a5063b8b0ff68042d67334e3feab9e95b9490f9a6ebf73b42ea"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.2"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      sha256: faf38497bda5ead2a8c7615f4f7939df04333478bf32e4173fcb06d428b5716b
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.4.1"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      sha256: fddb70d9b5277016c77a80201021d40a2247104d9f4aa7bab7157b7e3f05b84b
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.2"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      sha256: "2f5709ae4d3d59dd8f7cd309b4e023046b57d8a6c82130785d2b0e5868084e76"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.19.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: c8ea0233063ba03258fbcf2ca4d6dadfefe14f02fab57702265467a19f27fadf
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.7"
+  cupertino_icons:
+    dependency: "direct main"
+    description:
+      name: cupertino_icons
+      sha256: "41e005c33bd814be4d3096aff55b1908d419fde52ca656c8c47719ec745873cd"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.0.9"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      sha256: "5368f224a74523e8d2e7399ea1638b37aecfca824a3cc4dfdf77bf1fa905ac44"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.3.3"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      sha256: "3105dc8492f6183fb076ccf1f351ac3d60564bff92e20bfc4af9cc1651f4e7e1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "6.0.0"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  leak_tracker:
+    dependency: transitive
+    description:
+      name: leak_tracker
+      sha256: "33e2e26bdd85a0112ec15400c8cbffea70d0f9c3407491f672a2fad47915e2de"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "11.0.2"
+  leak_tracker_flutter_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_flutter_testing
+      sha256: "1dbc140bb5a23c75ea9c4811222756104fbcd1a27173f0c34ca01e16bea473c1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.10"
+  leak_tracker_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_testing
+      sha256: "8d5a2d49f4a66b49744b23b018848400d23e54caf9463f4eb20df3eb8acb2eb1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.2"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      sha256: "12f842a479589fea194fe5c5a3095abc7be0c1f2ddfa9a0e76aed1dbd26a87df"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "6.1.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: dc0b7dc7651697ea4ff3e69ef44b0407ea32c487a39fff6a4004fa585e901861
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.12.19"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      sha256: "9c337007e82b1889149c82ed242ed1cb24a66044e30979c44912381e9be4c48b"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.13.0"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: "1741988757a65eb6b36abe716829688cf01910bbf91c34354ff7ec1c3de2b349"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.18.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      sha256: "75cca69d1490965be98c73ceaea117e8a04dd21217b37b292c9ddbec0d955bc5"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.9.1"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      sha256: "56a02f1f4cd1a2d96303c0144c93bd6d909eea6bee6bf5a0e0b685edbd4c47ab"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.10.2"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: "8b27215b45d22309b5cddda1aa2b19bdfec9df0e765f2de506401c071d38d1b1"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.12.1"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: "969e04c80b8bcdf826f8f16579c7b14d780458bd97f56d107d3950fdbeef059d"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.4"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "921cd31725b72fe181906c6a94d987c78e3b98c2e205b397ea399d4054872b43"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.4.1"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: "7f554798625ea768a7518313e58f83891c7f5024f88e46e7182a4558850a4b8e"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.2.2"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: "949a932224383300f01be9221c39180316445ecb8e7547f70a41a35bf421fb9e"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.7.11"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.4.0"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      sha256: d530bd74fea330e6e364cda7a85019c434070188383e1cd8d9777ee586914c5b
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.2.0"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: "0016aef94fc66495ac78af5859181e3f3bf2026bd8eecc72b9565601e19ab360"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "15.2.0"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.1"
+  web_socket:
+    dependency: transitive
+    description:
+      name: web_socket
+      sha256: "34d64019aa8e36bf9842ac014bb5d2f5586ca73df5e4d9bf5c936975cae6982c"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.0.1"
+  web_socket_channel:
+    dependency: "direct main"
+    description:
+      name: web_socket_channel
+      sha256: d645757fb0f4773d602444000a8131ff5d48c9e47adfe9772652dd1a4f2d45c8
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.3"
+sdks:
+  dart: ">=3.12.2 <4.0.0"
+  flutter: ">=3.18.0-18.0.pre.54"

mobile/pubspec.yaml

@@ -0,0 +1,90 @@
+name: rtty_mobile
+description: "A new Flutter project."
+# The following line prevents the package from being accidentally published to
+# pub.dev using `flutter pub publish`. This is preferred for private packages.
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+# The following defines the version and build number for your application.
+# A version number is three numbers separated by dots, like 1.2.43
+# followed by an optional build number separated by a +.
+# Both the version and the builder number may be overridden in flutter
+# build by specifying --build-name and --build-number, respectively.
+# In Android, build-name is used as versionName while build-number used as versionCode.
+# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
+# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
+# Read more about iOS versioning at
+# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
+# In Windows, build-name is used as the major, minor, and patch parts
+# of the product and file versions while build-number is used as the build suffix.
+version: 1.0.0+1
+
+environment:
+  sdk: ^3.12.2
+
+# Dependencies specify other packages that your package needs in order to work.
+# To automatically upgrade your package dependencies to the latest versions
+# consider running `flutter pub upgrade --major-versions`. Alternatively,
+# dependencies can be manually updated by changing the version numbers below to
+# the latest version available on pub.dev. To see which dependencies have newer
+# versions available, run `flutter pub outdated`.
+dependencies:
+  flutter:
+    sdk: flutter
+
+  # The following adds the Cupertino Icons font to your application.
+  # Use with the CupertinoIcons class for iOS style icons.
+  cupertino_icons: ^1.0.8
+  web_socket_channel: ^3.0.3
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  # The "flutter_lints" package below contains a set of recommended lints to
+  # encourage good coding practices. The lint set provided by the package is
+  # activated in the `analysis_options.yaml` file located at the root of your
+  # package. See that file for information about deactivating specific lint
+  # rules and activating additional ones.
+  flutter_lints: ^6.0.0
+
+# For information on the generic Dart part of this file, see the
+# following page: https://dart.dev/tools/pub/pubspec
+
+# The following section is specific to Flutter packages.
+flutter:
+
+  # The following line ensures that the Material Icons font is
+  # included with your application, so that you can use the icons in
+  # the material Icons class.
+  uses-material-design: true
+
+  # To add assets to your application, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/to/resolution-aware-images
+
+  # For details regarding adding assets from package dependencies, see
+  # https://flutter.dev/to/asset-from-package
+
+  # To add custom fonts to your application, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts from package dependencies,
+  # see https://flutter.dev/to/font-from-package

mobile/test/widget_test.dart

@@ -0,0 +1,14 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:rtty_mobile/main.dart';
+
+void main() {
+  testWidgets('Rtty mobile renders terminal page', (WidgetTester tester) async {
+    await tester.pumpWidget(const RttyMobileApp());
+
+    // 未连接状态应显示连接面板与提示文案。
+    expect(find.text('未连接'), findsWidgets);
+    expect(find.text('连接'), findsOneWidget);
+    expect(find.text('输入命令，回车发送'), findsOneWidget);
+  });
+}

src/config.rs

@@ -12,6 +12,9 @@ pub struct ServerConfig {
     pub host: String,
     /// 监听端口。
     pub port: u16,
+    /// 可选访问令牌；设置后所有 WebSocket 连接都必须携带 `?token=` 参数。
+    /// 未设置（None）表示不鉴权，仅适合内网/本机使用。
+    pub token: Option<String>,
     /// 默认启动的 Shell 程序。
     pub shell: String,
     /// 终端默认列数。
@@ -31,6 +34,7 @@ impl Default for ServerConfig {
         Self {
             host: "0.0.0.0".into(),
             port: 8080,
+            token: None,
             shell: default_shell(),
             cols: 120,
             rows: 32,
@@ -54,6 +58,10 @@ impl ServerConfig {
         {
             cfg.port = p;
         }
+        if let Ok(v) = env::var("RTTY_TOKEN") {
+            // 空字符串视为未设置。
+            cfg.token = (!v.is_empty()).then_some(v);
+        }
         if let Ok(v) = env::var("RTTY_SHELL") {
             cfg.shell = v;
         }

src/terminal/engine.rs

@@ -6,6 +6,7 @@
 //! - 为移动端生成语义化 JSON 快照，为断线重连提供状态恢复。
 
 use std::io::Write;
+use std::fmt::Write as FmtWrite;
 use std::sync::{Arc, Mutex};
 
 use alacritty_terminal::event::{Event, EventListener};
@@ -13,7 +14,7 @@ use alacritty_terminal::grid::Dimensions;
 use alacritty_terminal::index::{Column, Point};
 use alacritty_terminal::term::cell::Flags;
 use alacritty_terminal::term::{point_to_viewport, viewport_to_point, Config, Term};
-use alacritty_terminal::vte::ansi::Processor;
+use alacritty_terminal::vte::ansi::{Color, Processor};
 
 use crate::ws::protocol::MobileSnapshot;
 
@@ -38,6 +39,17 @@ impl Dimensions for TermSize {
     }
 }
 
+/// 参与 SGR 样式输出的 flag 子集（重绘时只比较/输出这些样式位，
+/// 忽略 WIDE_CHAR、WRAPLINE 等纯布局标记）。
+const STYLE_FLAGS: Flags = Flags::INVERSE
+    .union(Flags::BOLD)
+    .union(Flags::ITALIC)
+    .union(Flags::UNDERLINE)
+    .union(Flags::DIM)
+    .union(Flags::STRIKEOUT)
+    .union(Flags::HIDDEN)
+    .union(Flags::ALL_UNDERLINES);
+
 /// 事件监听器：把 alacritty 要求回写给 Shell 的数据写入 PTY。
 #[derive(Clone)]
 pub struct SessionListener {
@@ -148,4 +160,119 @@ impl TerminalEngine {
     pub fn rows(&self) -> usize {
         self.term.grid().screen_lines()
     }
+
+    /// 将当前屏幕序列化为 ANSI 重绘序列（清屏 + 逐行 SGR 着色 + 光标归位）。
+    ///
+    /// 桌面端在（重）连接时收到该序列，本地 Alacritty 引擎即可恢复服务端
+    /// “真相源”的屏幕状态——这是断线重连后画面恢复的关键一步。
+    pub fn redraw_ansi(&self) -> Vec<u8> {
+        let grid = self.term.grid();
+        let rows = grid.screen_lines();
+        // 始终重绘当前屏幕视口（滚动历史不参与，保持轻量）。
+        let display_offset = 0usize;
+
+        let mut out = String::with_capacity(rows * 64);
+        // 清屏并把光标移到左上角。
+        out.push_str("\x1b[2J\x1b[H");
+
+        for line_idx in 0..rows {
+            let grid_point = viewport_to_point(display_offset, Point::new(line_idx, Column(0)));
+            let row = &grid[grid_point.line];
+
+            // 第一遍：收集本行可见单元格，并记住最后一个非空格的位置，
+            // 便于行尾用“擦除到行末”代替输出大量空格。
+            let mut cells: Vec<(char, Color, Color, Flags)> = Vec::with_capacity(row.len());
+            let mut last_non_space = 0usize;
+            for cell in row {
+                if cell
+                    .flags
+                    .intersects(Flags::WIDE_CHAR_SPACER | Flags::LEADING_WIDE_CHAR_SPACER | Flags::HIDDEN)
+                {
+                    continue;
+                }
+                let style = cell.flags & STYLE_FLAGS;
+                cells.push((cell.c, cell.fg, cell.bg, style));
+                if cell.c != ' ' {
+                    last_non_space = cells.len();
+                }
+                // 零宽字符（组合音标等）必须紧跟主字符输出。
+                if let Some(zw) = cell.zerowidth() {
+                    for &c in zw {
+                        cells.push((c, cell.fg, cell.bg, style));
+                        last_non_space = cells.len();
+                    }
+                }
+            }
+
+            // 第二遍：按“相邻同风格”分组输出，风格变化时才发出 SGR 序列。
+            let mut cur_style: Option<(Color, Color, Flags)> = None;
+            for &(c, fg, bg, style) in cells.iter().take(last_non_space) {
+                let style_key = (fg, bg, style);
+                if cur_style != Some(style_key) {
+                    cur_style = Some(style_key);
+                    out.push_str("\x1b[0m\x1b[0");
+                    push_flags_sgr(&mut out, style);
+                    push_color_sgr(&mut out, fg, true);
+                    push_color_sgr(&mut out, bg, false);
+                    out.push('m');
+                }
+                out.push(c);
+            }
+            // 行尾擦除到行末，保证背景色完整且无残留字符。
+            out.push_str("\x1b[K\r\n");
+        }
+
+        // 最后把光标放回服务端记录的位置。
+        if let Some(p) = point_to_viewport(display_offset, grid.cursor.point) {
+            let _ = write!(out, "\x1b[{};{}H", p.line + 1, p.column.0 + 1);
+        }
+
+        out.into_bytes()
+    }
+}
+
+/// 把颜色追加为 SGR 参数（含前导分号），fg=true 表示前景色。
+fn push_color_sgr(out: &mut String, color: Color, fg: bool) {
+    let base = if fg { 38 } else { 48 };
+    match color {
+        // 标准 16 色：用 256 色索引表达，兼容性最好。
+        Color::Named(n) if (n as usize) < 16 => {
+            let _ = write!(out, ";{base};5;{}", n as u8);
+        }
+        // Foreground/Background/Dim 等特殊色：直接回落到默认前景/背景。
+        Color::Named(_) => {
+            out.push_str(if fg { ";39" } else { ";49" });
+        }
+        Color::Indexed(i) => {
+            let _ = write!(out, ";{base};5;{i}");
+        }
+        Color::Spec(rgb) => {
+            let _ = write!(out, ";{base};2;{};{};{}", rgb.r, rgb.g, rgb.b);
+        }
+    }
+}
+
+/// 把样式 flag 追加为 SGR 参数（含前导分号）。
+fn push_flags_sgr(out: &mut String, flags: Flags) {
+    if flags.contains(Flags::BOLD) {
+        out.push_str(";1");
+    }
+    if flags.contains(Flags::DIM) {
+        out.push_str(";2");
+    }
+    if flags.contains(Flags::ITALIC) {
+        out.push_str(";3");
+    }
+    if flags.intersects(Flags::ALL_UNDERLINES) {
+        out.push_str(";4");
+    }
+    if flags.contains(Flags::INVERSE) {
+        out.push_str(";7");
+    }
+    if flags.contains(Flags::HIDDEN) {
+        out.push_str(";8");
+    }
+    if flags.contains(Flags::STRIKEOUT) {
+        out.push_str(";9");
+    }
 }

src/terminal/pty.rs

@@ -3,6 +3,16 @@
 //! 基于 [`portable_pty`] 创建伪终端并拉起子进程（Shell），提供读写与 resize 能力。
 //! 读取端由服务端读取任务独占持有，写入端与 master 句柄可被多个客户端共享。
 
+// ── 背景知识：什么是 PTY？────────────────────────────────────────────
+// PTY（pseudo-terminal，伪终端）是操作系统提供的一对"虚拟终端"：
+//   - Slave（从端）：挂到子进程上，子进程把它当作 stdin/stdout/stderr 使用；
+//   - Master（主端）：由服务端持有，用来读取子进程写到"屏幕"上的输出，
+//     以及把键盘输入"敲"进终端交给子进程。
+// 这样一来，Shell（bash / powershell 等）会以为自己运行在一个真实终端里，
+// 因此会启用交互模式、输出 ANSI 转义序列（颜色、光标移动等），
+// 而服务端可以在 Master 端拿到这些原始字节流。
+// ─────────────────────────────────────────────────────────────────────
+
 use std::io::{Read, Write};
 use std::sync::{Arc, Mutex};
 
@@ -10,34 +20,65 @@ use anyhow::{Context, Result};
 use portable_pty::{Child, MasterPty, PtyPair, PtySize};
 
 /// 一个已启动的 PTY 会话。
+///
+/// 它代表"一个运行中的 shell 及其背后的终端"。整个数据流是这样的：
+/// 子进程输出 → reader（由后台读取任务独占）→ 交给 TerminalEngine 解析；
+/// 客户端输入 → `write()` → writer → 子进程 stdin。
 pub struct PtySession {
     /// Master 端句柄，用于 resize / 获取大小。
+    ///
+    /// 注意：写入端被 `take_writer()` 取走之后，这个 master 句柄本身
+    /// 就不再负责读写，只保留控制能力（改尺寸、查状态）。
     master: Box<dyn MasterPty + Send>,
-    /// 从 Slave 端读取输出的流。独占，由读取任务持有。
+    /// 从 Master 端读取输出的流。
+    ///
+    /// 设计为 `Option` 是为了支持"一次性取出"：读取端会被交给一个独立的
+    /// 后台读取任务独占持有（尤其 Windows 的 ConPTY 要求单一读取线程），
+    /// 取出之后本结构体里就不再保留读取能力（见 [`Self::take_reader`]）。
     reader: Option<Box<dyn Read + Send>>,
-    /// 写入 Slave 端的流。可被多个客户端共享（加锁）。
+    /// 写入 Master 端的流，可被多个客户端共享（加锁）。
+    ///
+    /// `Arc` 让多个持有者（例如多个 WebSocket 连接处理任务）都能拿到同一份
+    /// 写入端；`Mutex` 保证同一时刻只有一个线程在真正写入，避免数据交错。
     writer: Arc<Mutex<Box<dyn Write + Send>>>,
     /// 子进程句柄，用于检测退出 / 终止。
     child: Box<dyn Child + Send + Sync>,
-    /// 当前尺寸。
+    /// 当前尺寸（行 / 列），`resize()` 时会同步更新这份缓存。
     size: PtySize,
 }
 
 impl PtySession {
     /// 以指定 Shell 与初始尺寸创建一个 PTY 会话。
     pub fn new(shell: &str, cols: u16, rows: u16) -> Result<Self> {
+        // 1. 组装初始尺寸：行列数来自客户端（首次连接时上报），
+        //    像素尺寸填 0，普通终端程序用不到。
         let size = PtySize { rows, cols, pixel_width: 0, pixel_height: 0 };
 
+        // 2. 获取当前平台的原生 PTY 实现：
+        //    - Linux/macOS 上是 Unix pty（openpty）；
+        //    - Windows 上是 ConPTY。
         let pty_system = portable_pty::native_pty_system();
+
+        // 3. openpty 真正创建一对 master/slave 终端，并应用初始尺寸。
+        //    返回的 PtyPair 里同时装着 master 与 slave 两端。
         let pair = pty_system.openpty(size).context("failed to open pty")?;
 
+        // 4. 在 slave 端拉起 shell 子进程，并把子进程的 stdio 接到 PTY 上。
         let child = spawn_child(&pair, shell).context("failed to spawn shell")?;
+
+        // 5. 从 master 端克隆出一个独立的读取流。
+        //    是"克隆"而不是直接拿 master：master 本身还要留下来做 resize，
+        //    所以读取走另一个句柄（Windows ConPTY 下内部会启动线程持续泵数据）。
         let reader = pair.master.try_clone_reader().context("failed to clone pty reader")?;
+
+        // 6. 从 master 上取走写入流（take 之后 master 不再负责写入）。
         let writer = pair.master.take_writer().context("failed to take pty writer")?;
 
         Ok(Self {
             master: pair.master,
             reader: Some(reader),
+            // 用 Arc<Mutex<>> 包一层：多个客户端连接共享同一个写入端，
+            // 互斥锁保证同一时刻只有一个线程在写。
             writer: Arc::new(Mutex::new(writer)),
             child,
             size,
@@ -45,54 +86,94 @@ impl PtySession {
     }
 
     /// 取出读取端，供 PTY 读取任务独占使用。取走后不可再次调用。
+    ///
+    /// 为什么是"独占"而不是共享？
+    /// 1. 读取必须持续不断地进行，否则子进程输出一多就会阻塞在管道上；
+    /// 2. portable-pty 在 Windows 上要求读取由单一专用线程完成。
+    /// 所以这里用 `Option::take` 把所有权移交出去（self.reader 变回 None），
+    /// 会话本身不再持有读取端，调用方拿到后负责持续读取并喂给终端引擎。
     pub fn take_reader(&mut self) -> Option<Box<dyn Read + Send>> {
         self.reader.take()
     }
 
     /// 获取共享写入端。
+    ///
+    /// 返回的是 Arc 引用，调用方（一般是 WebSocket 处理层）可以克隆这个
+    /// `Arc<Mutex<...>>` 到多个任务里，从而共享同一个写入端。
     pub fn writer(&self) -> &Arc<Mutex<Box<dyn Write + Send>>> {
         &self.writer
     }
 
-    /// 将数据写入 Slave 端（发送给 Shell）。
+    /// 将数据写入 Master 端（最终送达 Shell 的 stdin）。
+    ///
+    /// 这是"客户端输入 → 服务端 → 子进程"这条链路的落点：
+    /// 任何客户端发来的键盘输入最终都会调用到这里。
     pub fn write(&self, data: &[u8]) -> Result<()> {
+        // 先加锁，避免多个连接同时写造成数据交错/竞态。
         let mut w = self
             .writer
             .lock()
             .map_err(|_| anyhow::anyhow!("pty writer poisoned"))?;
+        // write_all：要么全部写完，要么返回错误（内部会循环补完短写）。
         w.write_all(data)?;
+        // flush：确保数据真正发到内核/管道，而不是留在用户态缓冲里。
         w.flush()?;
         Ok(())
     }
 
     /// 调整 PTY 尺寸（通知内核与子进程）。
+    ///
+    /// 客户端窗口大小变化时调用：把新行列数同步给 PTY 内核对象，
+    /// 子进程会收到 SIGWINCH 信号（Unix）或等效通知，从而重新排版
+    /// （例如 vim / htop 会立刻按新行列数重绘）。
     pub fn resize(&mut self, cols: u16, rows: u16) -> Result<()> {
+        // 先更新本地缓存，便于随时查询当前尺寸。
         self.size.rows = rows;
         self.size.cols = cols;
+        // 再真正执行 resize，通知内核与子进程。
         self.master.resize(self.size).context("failed to resize pty")
     }
 
-    /// 当前 PTY 尺寸。
+    /// 当前 PTY 尺寸，返回 (列, 行)。
     pub fn size(&self) -> (u16, u16) {
         (self.size.cols, self.size.rows)
     }
 
-    /// 子进程是否已退出。
+    /// 子进程是否已退出（非阻塞轮询）。
+    ///
+    /// - `Ok(None)` 表示进程仍在运行；
+    /// - `Ok(Some(status))` 表示已退出，并拿到退出状态。
+    /// 服务端后台任务定期调用它探测 shell 是否退出，用于清理会话。
     pub fn try_wait(&mut self) -> Result<Option<portable_pty::ExitStatus>> {
         self.child.try_wait().context("failed to poll child")
     }
 
     /// 终止子进程。
+    ///
+    /// 会话关闭 / 客户端主动断开时调用，直接杀死 shell，
+    /// 避免留下孤儿进程继续驻留。
     pub fn kill(&mut self) -> Result<()> {
         self.child.kill().context("failed to kill child")
     }
 }
 
 /// 拉起子进程，并把 Stdio 重定向到 PTY 的 Slave 端。
+///
+/// 关键点：
+/// - `CommandBuilder` 是 portable_pty 对系统命令构造器的跨平台封装；
+/// - `pair.slave.spawn_command` 会把子进程的 stdin/stdout/stderr
+///   全部接到 slave 端，这样 shell 的输入输出就都走 PTY 了。
 fn spawn_child(pair: &PtyPair, shell: &str) -> Result<Box<dyn Child + Send + Sync>> {
     let mut cmd = portable_pty::CommandBuilder::new(shell);
-    // 让 Shell 以交互方式运行。
+
+    // 告诉子进程"你面前是一个支持 256 色的 xterm 兼容终端"。
+    // 这会让 shell 及其中的 TUI 程序（vim/htop/tmux）输出正确的
+    // ANSI 颜色与光标控制序列，否则它们可能退化成 16 色甚至无颜色。
+    // （Shell 的"交互模式"本身由 stdio 是 TTY 决定，即上面 spawn 在 slave 上，
+    //   这里的 TERM 只是告诉程序终端的类型与能力。）
     cmd.env("TERM", "xterm-256color");
+
+    // 真正拉起子进程。
     let child = pair.slave.spawn_command(cmd)?;
     Ok(child)
 }

src/ws/handler.rs

@@ -68,6 +68,8 @@ pub struct Session {
     pub control: Arc<Mutex<Option<String>>>,
     /// 当前连接的客户端数。
     pub clients: AtomicUsize,
+    /// 当前连接的移动端客户端数（>0 时才生成语义快照，避免无谓开销）。
+    pub mobile_clients: AtomicUsize,
 }
 
 /// WebSocket 路由入口。
@@ -88,9 +90,19 @@ async fn handle_socket(
     let client_id = format!("client-{}", CLIENT_SEQ.fetch_add(1, Ordering::Relaxed));
     let kind = ClientKind::from_params(&params);
 
+    // 最小鉴权：配置了 RTTY_TOKEN 时，所有连接必须携带匹配的 ?token= 参数。
+    if let Some(expected) = &state.config.token {
+        let actual = params.get("token").map(|s| s.as_str());
+        if actual != Some(expected.as_str()) {
+            let msg = ServerMessage::Error { message: "invalid or missing token".into() };
+            let _ = send_text(socket, msg.to_json()).await;
+            return;
+        }
+    }
+
     let requested = params.get("session").cloned().unwrap_or_default();
-    let session = match get_or_create_session(&state, &requested) {
+    let (session, resumed) = match get_or_create_session(&state, &requested) {
-        Ok(s) => s,
+        Ok(pair) => pair,
         Err(e) => {
             let msg = ServerMessage::Error { message: format!("session error: {e}") };
             let _ = send_text(socket, msg.to_json()).await;
@@ -102,12 +114,12 @@ async fn handle_socket(
 
     // 发送就绪消息。
     let (cols, rows) = session.pty.lock().unwrap().size();
-    let ready = ServerMessage::Ready { id: session.id.clone(), cols, rows };
+    let ready = ServerMessage::Ready { id: session.id.clone(), cols, rows, resumed };
     if tx.send(Message::Text(ready.to_json())).await.is_err() {
         return;
     }
 
-    // 移动端在连接时获取一次语义化快照作为初始状态（桌面端走原始 ANSI 流）。
+    // 移动端在连接时获取一次语义化快照作为初始状态。
     if kind == ClientKind::Mobile {
         let snap = session.engine.lock().unwrap().snapshot();
         let init = ServerMessage::MobileSnapshot { data: snap };
@@ -129,6 +141,19 @@ async fn handle_socket(
     // 订阅输出。
     let mut out_rx = session.output.subscribe();
     session.clients.fetch_add(1, Ordering::SeqCst);
+    if kind == ClientKind::Mobile {
+        session.mobile_clients.fetch_add(1, Ordering::SeqCst);
+    }
+
+    // 桌面端：订阅后立即重放当前屏幕。重绘序列在引擎锁内生成并注入广播通道，
+    // 与读取任务发出的 Raw 帧严格有序（读取任务同样在引擎锁内发帧），
+    // 从而保证断线重连后画面完整恢复。
+    if kind == ClientKind::Desktop {
+        let eng = session.engine.lock().unwrap();
+        let redraw = eng.redraw_ansi();
+        let _ = session.output.send(OutputEvent::Raw(redraw));
+        drop(eng);
+    }
 
     loop {
         tokio::select! {
@@ -179,6 +204,9 @@ async fn handle_socket(
     }
 
     session.clients.fetch_sub(1, Ordering::SeqCst);
+    if kind == ClientKind::Mobile {
+        session.mobile_clients.fetch_sub(1, Ordering::SeqCst);
+    }
 
     // 若已无客户端，安排空闲超时清理（兜底机制，Windows ConPTY 下进程退出
     // 检测不可靠，依赖超时确保会话最终被释放）。
@@ -227,7 +255,13 @@ fn handle_client_message(
             let mut pty = session.pty.lock().unwrap();
             let _ = pty.resize(cols, rows);
             drop(pty);
-            session.engine.lock().unwrap().resize(cols, rows);
+
+            // resize 后同样在引擎锁内完成网格调整 + 全屏重绘注入，
+            // 让所有桌面端按新尺寸一致重排（与读取帧保持有序）。
+            let mut eng = session.engine.lock().unwrap();
+            eng.resize(cols, rows);
+            let redraw = eng.redraw_ansi();
+            let _ = session.output.send(OutputEvent::Raw(redraw));
             None
         }
         ClientMessage::ClaimControl => {
@@ -240,7 +274,7 @@ fn handle_client_message(
             drop(control);
             Some(ServerMessage::ControlResponse { granted, holder }.to_json())
         }
-        ClientMessage::Ping => None,
+        ClientMessage::Ping => Some(ServerMessage::Pong.to_json()),
     }
 }
 
@@ -248,17 +282,32 @@ fn handle_client_message(
 fn get_or_create_session(
     state: &Arc<crate::AppState>,
     requested: &str,
-) -> Result<Arc<Session>> {
+) -> Result<(Arc<Session>, bool)> {
-    if !requested.is_empty()
+    use dashmap::mapref::entry::Entry;
-        && let Some(s) = state.sessions.get(requested)
+
-    {
+    // 指定了会话 ID：按 ID 原子地“查-建-插”。
-        return Ok(s.clone());
+    // - ID 已存在 → 恢复旧会话（resumed=true）；
+    // - ID 不存在 → 以该 ID 新建会话（resumed=false）。
+    // 用 Entry API 避免两个连接同时命中同一 ID 时重复创建/互相覆盖。
+    if !requested.is_empty() {
+        return match state.sessions.entry(requested.to_string()) {
+            Entry::Occupied(e) => Ok((e.get().clone(), true)),
+            Entry::Vacant(v) => {
+                let session = create_session(requested.to_string(), &state.config, state.clone())?;
+                Ok((v.insert(session).clone(), false))
+            }
+        };
     }
 
+    // 未指定会话：分配全局唯一 ID 并新建。
     let id = format!("session-{}", SESSION_SEQ.fetch_add(1, Ordering::Relaxed));
-    let session = create_session(id.clone(), &state.config, state.clone())?;
+    match state.sessions.entry(id.clone()) {
-    state.sessions.insert(id.clone(), session.clone());
+        Entry::Occupied(e) => Ok((e.get().clone(), true)), // 理论极罕见
-    Ok(session)
+        Entry::Vacant(v) => {
+            let session = create_session(id, &state.config, state.clone())?;
+            Ok((v.insert(session).clone(), false))
+        }
+    }
 }
 
 /// 创建会话并启动 PTY 读取任务。
@@ -284,6 +333,7 @@ fn create_session(
         output,
         control: Arc::new(Mutex::new(None)),
         clients: AtomicUsize::new(0),
+        mobile_clients: AtomicUsize::new(0),
     });
 
     start_pty_reader(session.clone(), reader, state);
@@ -312,19 +362,24 @@ fn start_pty_reader(
             };
             let chunk = &buf[..n];
 
-            // 喂给解析器并生成快照。
+            // 引擎锁内完成“喂解析 + 发帧”：保证 Raw/快照帧与重绘帧严格有序
-            let snapshot = {
+            // （桌面端重连重放依赖这一不变量）。
-                let mut eng = match session.engine.lock() {
+            let mut eng = match session.engine.lock() {
-                    Ok(e) => e,
+                Ok(e) => e,
-                    Err(_) => break,
+                Err(_) => break,
-                };
-                eng.feed(chunk);
-                eng.snapshot()
             };
+            eng.feed(chunk);
 
-            // 广播原始字节 + 快照。
+            // 广播原始 ANSI 字节（桌面端渲染）。
             let _ = session.output.send(OutputEvent::Raw(chunk.to_vec()));
-            let _ = session.output.send(OutputEvent::Snapshot(snapshot));
+
+            // 惰性快照：仅当存在移动端订阅者时才生成并广播（移动端是唯一消费者），
+            // 避免纯桌面场景下每次读取都做全量网格序列化。
+            if session.mobile_clients.load(Ordering::SeqCst) > 0 {
+                let snap = eng.snapshot();
+                let _ = session.output.send(OutputEvent::Snapshot(snap));
+            }
+            drop(eng);
         }
 
         // PTY 读到 EOF（Unix 场景）：触发会话结束并清理。

src/ws/protocol.rs

@@ -51,6 +51,8 @@ pub enum ServerMessage {
         id: String,
         cols: u16,
         rows: u16,
+        /// 是否恢复了已存在的会话（false 表示本次新建了会话）。
+        resumed: bool,
     },
     /// 移动端专属：解耦后的语义化屏显快照。
     MobileSnapshot {
@@ -61,6 +63,8 @@ pub enum ServerMessage {
         granted: bool,
         holder: Option<String>,
     },
+    /// 心跳应答。
+    Pong,
     /// 服务端错误。
     Error {
         message: String,