feat(remote): 修复键盘输入映射并重构连接流程

- Android端注入按键时显式设置SOURCE_KEYBOARD，修复IME丢弃事件导致输入框无法输入文字的问题
- Flutter端新增Flutter逻辑键到Android keyCode的转换映射，避免功能键误触发
- 重构RemoteController，分离信令连接与远程控制逻辑，支持设备列表选择与配对码兑换
- AuthRepository接口新增getBindings、getOnlineDevices、redeemPairingCode方法
- DioAuthRepository实现401自动刷新token重试机制
- ConnectionSessionState扩展设备列表、在线状态、配对码等状态字段

webrtc_controller_flutter/lib/l10n/app_en.arb

@@ -13,8 +13,7 @@
   "connecting": "Connecting...",
   "loginAccount": "Login Account",
   "connectDevice": "Connect Device",
-  "serverUrl": "Signal Server URL:",
-  "serverUrlPlaceholder": "wss://www.ttstd.com/signal",
+
   "deviceId": "Device ID (assigned by server):",
   "deviceIdPlaceholder": "Assigned by server",
   "targetDeviceId": "Target Device ID:",
@@ -23,7 +22,7 @@
   "password": "Password",
   "loginFailed": "Login failed: {error}",
   "usernamePasswordRequired": "Please enter username and password",
-  "serverAndTargetRequired": "Please enter server URL and target device ID",
+  "targetRequired": "Please enter target device ID",
   "authTitle": "Connection Auth",
   "authNone": "Passwordless",
   "authNoneDesc": "Manual confirmation on the controlled device",
@@ -67,5 +66,16 @@
   "forceLogout": "Account logged in elsewhere, force logged out.",
   "loginFirst": "Please login before connecting",
   "pleaseFillAuth": "Please enter the code or password",
-  "streamModeSelfCodecDesc": "Self-codec hardware decoding is not supported on this platform."
+  "streamModeSelfCodecDesc": "Self-codec hardware decoding is not supported on this platform.",
+  "boundDevices": "Bound Devices",
+  "online": "Online",
+  "offline": "Offline",
+  "noBoundDevices": "No bound devices yet",
+  "refreshDevices": "Refresh",
+  "redeemPairingCode": "Bind with Pairing Code",
+  "pairingCodeHint": "Enter the pairing code shown on the controlled device",
+  "bindingFailed": "Binding failed: {error}",
+  "deviceOfflineCannotConnect": "Device \"{name}\" is currently offline and cannot be connected",
+  "pleaseSelectDevice": "Please select a bound device first",
+  "bindSuccess": "Bound successfully"
 }

webrtc_controller_flutter/lib/l10n/app_localizations.dart

@@ -176,18 +176,6 @@ abstract class AppLocalizations {
   /// **'连接被控设备'**
   String get connectDevice;
 
-  /// No description provided for @serverUrl.
-  ///
-  /// In zh, this message translates to:
-  /// **'信令服务器地址:'**
-  String get serverUrl;
-
-  /// No description provided for @serverUrlPlaceholder.
-  ///
-  /// In zh, this message translates to:
-  /// **'wss://www.ttstd.com/signal'**
-  String get serverUrlPlaceholder;
-
   /// No description provided for @deviceId.
   ///
   /// In zh, this message translates to:
@@ -236,11 +224,11 @@ abstract class AppLocalizations {
   /// **'请输入用户名和密码'**
   String get usernamePasswordRequired;
 
-  /// No description provided for @serverAndTargetRequired.
+  /// No description provided for @targetRequired.
   ///
   /// In zh, this message translates to:
-  /// **'请填写服务器地址和目标设备ID'**
-  String get serverAndTargetRequired;
+  /// **'请填写目标设备ID'**
+  String get targetRequired;
 
   /// No description provided for @authTitle.
   ///
@@ -505,6 +493,72 @@ abstract class AppLocalizations {
   /// In zh, this message translates to:
   /// **'当前平台不支持自编码硬解。'**
   String get streamModeSelfCodecDesc;
+
+  /// No description provided for @boundDevices.
+  ///
+  /// In zh, this message translates to:
+  /// **'已绑定设备'**
+  String get boundDevices;
+
+  /// No description provided for @online.
+  ///
+  /// In zh, this message translates to:
+  /// **'在线'**
+  String get online;
+
+  /// No description provided for @offline.
+  ///
+  /// In zh, this message translates to:
+  /// **'离线'**
+  String get offline;
+
+  /// No description provided for @noBoundDevices.
+  ///
+  /// In zh, this message translates to:
+  /// **'暂无已绑定设备'**
+  String get noBoundDevices;
+
+  /// No description provided for @refreshDevices.
+  ///
+  /// In zh, this message translates to:
+  /// **'刷新'**
+  String get refreshDevices;
+
+  /// No description provided for @redeemPairingCode.
+  ///
+  /// In zh, this message translates to:
+  /// **'使用配对码绑定'**
+  String get redeemPairingCode;
+
+  /// No description provided for @pairingCodeHint.
+  ///
+  /// In zh, this message translates to:
+  /// **'请输入被控端显示的配对码'**
+  String get pairingCodeHint;
+
+  /// No description provided for @bindingFailed.
+  ///
+  /// In zh, this message translates to:
+  /// **'绑定失败：{error}'**
+  String bindingFailed(Object error);
+
+  /// No description provided for @deviceOfflineCannotConnect.
+  ///
+  /// In zh, this message translates to:
+  /// **'设备「{name}」当前不在线，无法连接'**
+  String deviceOfflineCannotConnect(Object name);
+
+  /// No description provided for @pleaseSelectDevice.
+  ///
+  /// In zh, this message translates to:
+  /// **'请先选择一个绑定的设备'**
+  String get pleaseSelectDevice;
+
+  /// No description provided for @bindSuccess.
+  ///
+  /// In zh, this message translates to:
+  /// **'绑定成功'**
+  String get bindSuccess;
 }
 
 class _AppLocalizationsDelegate

webrtc_controller_flutter/lib/l10n/app_localizations_en.dart

@@ -49,12 +49,6 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get connectDevice => 'Connect Device';
 
-  @override
-  String get serverUrl => 'Signal Server URL:';
-
-  @override
-  String get serverUrlPlaceholder => 'wss://www.ttstd.com/signal';
-
   @override
   String get deviceId => 'Device ID (assigned by server):';
 
@@ -82,8 +76,7 @@ class AppLocalizationsEn extends AppLocalizations {
   String get usernamePasswordRequired => 'Please enter username and password';
 
   @override
-  String get serverAndTargetRequired =>
-      'Please enter server URL and target device ID';
+  String get targetRequired => 'Please enter target device ID';
 
   @override
   String get authTitle => 'Connection Auth';
@@ -239,4 +232,42 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get streamModeSelfCodecDesc =>
       'Self-codec hardware decoding is not supported on this platform.';
+
+  @override
+  String get boundDevices => 'Bound Devices';
+
+  @override
+  String get online => 'Online';
+
+  @override
+  String get offline => 'Offline';
+
+  @override
+  String get noBoundDevices => 'No bound devices yet';
+
+  @override
+  String get refreshDevices => 'Refresh';
+
+  @override
+  String get redeemPairingCode => 'Bind with Pairing Code';
+
+  @override
+  String get pairingCodeHint =>
+      'Enter the pairing code shown on the controlled device';
+
+  @override
+  String bindingFailed(Object error) {
+    return 'Binding failed: $error';
+  }
+
+  @override
+  String deviceOfflineCannotConnect(Object name) {
+    return 'Device \"$name\" is currently offline and cannot be connected';
+  }
+
+  @override
+  String get pleaseSelectDevice => 'Please select a bound device first';
+
+  @override
+  String get bindSuccess => 'Bound successfully';
 }

webrtc_controller_flutter/lib/l10n/app_localizations_zh.dart

@@ -49,12 +49,6 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get connectDevice => '连接被控设备';
 
-  @override
-  String get serverUrl => '信令服务器地址:';
-
-  @override
-  String get serverUrlPlaceholder => 'wss://www.ttstd.com/signal';
-
   @override
   String get deviceId => '本机设备ID（连接后由服务端下发，无需填写）:';
 
@@ -82,7 +76,7 @@ class AppLocalizationsZh extends AppLocalizations {
   String get usernamePasswordRequired => '请输入用户名和密码';
 
   @override
-  String get serverAndTargetRequired => '请填写服务器地址和目标设备ID';
+  String get targetRequired => '请填写目标设备ID';
 
   @override
   String get authTitle => '连接鉴权';
@@ -231,4 +225,41 @@ class AppLocalizationsZh extends AppLocalizations {
 
   @override
   String get streamModeSelfCodecDesc => '当前平台不支持自编码硬解。';
+
+  @override
+  String get boundDevices => '已绑定设备';
+
+  @override
+  String get online => '在线';
+
+  @override
+  String get offline => '离线';
+
+  @override
+  String get noBoundDevices => '暂无已绑定设备';
+
+  @override
+  String get refreshDevices => '刷新';
+
+  @override
+  String get redeemPairingCode => '使用配对码绑定';
+
+  @override
+  String get pairingCodeHint => '请输入被控端显示的配对码';
+
+  @override
+  String bindingFailed(Object error) {
+    return '绑定失败：$error';
+  }
+
+  @override
+  String deviceOfflineCannotConnect(Object name) {
+    return '设备「$name」当前不在线，无法连接';
+  }
+
+  @override
+  String get pleaseSelectDevice => '请先选择一个绑定的设备';
+
+  @override
+  String get bindSuccess => '绑定成功';
 }

webrtc_controller_flutter/lib/l10n/app_zh.arb

@@ -13,8 +13,7 @@
   "connecting": "正在连接...",
   "loginAccount": "登录账号",
   "connectDevice": "连接被控设备",
-  "serverUrl": "信令服务器地址:",
-  "serverUrlPlaceholder": "wss://www.ttstd.com/signal",
+
   "deviceId": "本机设备ID（连接后由服务端下发，无需填写）:",
   "deviceIdPlaceholder": "连接后由服务端下发",
   "targetDeviceId": "目标被控设备ID:",
@@ -23,7 +22,7 @@
   "password": "密码",
   "loginFailed": "登录失败：{error}",
   "usernamePasswordRequired": "请输入用户名和密码",
-  "serverAndTargetRequired": "请填写服务器地址和目标设备ID",
+  "targetRequired": "请填写目标设备ID",
   "authTitle": "连接鉴权",
   "authNone": "免密连接",
   "authNoneDesc": "被控端弹出手动确认框，无需验证码或密码",
@@ -67,5 +66,16 @@
   "forceLogout": "账号已在其他位置登录，已强制下线。",
   "loginFirst": "请先登录后再连接",
   "pleaseFillAuth": "请输入验证码或密码",
-  "streamModeSelfCodecDesc": "当前平台不支持自编码硬解。"
+  "streamModeSelfCodecDesc": "当前平台不支持自编码硬解。",
+  "boundDevices": "已绑定设备",
+  "online": "在线",
+  "offline": "离线",
+  "noBoundDevices": "暂无已绑定设备",
+  "refreshDevices": "刷新",
+  "redeemPairingCode": "使用配对码绑定",
+  "pairingCodeHint": "请输入被控端显示的配对码",
+  "bindingFailed": "绑定失败：{error}",
+  "deviceOfflineCannotConnect": "设备「{name}」当前不在线，无法连接",
+  "pleaseSelectDevice": "请先选择一个绑定的设备",
+  "bindSuccess": "绑定成功"
 }