fix: 完善直播结束通知与 WebSocket 连接

frontend/lib/l10n/app_en.arb

@@ -50,6 +50,8 @@
   "availableNow": "Available now",
   "waitingForTranscoding": "Waiting for backend transcoding output",
   "sendMessage": "Send a message...",
+  "liveStreamEnded": "The host has ended the live stream.",
+  "liveStreamEndedShort": "Live stream ended",
   "liveChat": "Live Chat",
   "refresh": "Refresh",
   "volume": "Volume",

frontend/lib/l10n/app_ja.arb

@@ -50,6 +50,8 @@
   "availableNow": "利用可能",
   "waitingForTranscoding": "バックエンドのトランスコード出力を待機中",
   "sendMessage": "メッセージを送信...",
+  "liveStreamEnded": "配信者が退出したため、ライブ配信は終了しました。",
+  "liveStreamEndedShort": "ライブ配信は終了しました",
   "liveChat": "ライブチャット",
   "refresh": "更新",
   "volume": "音量",

frontend/lib/l10n/app_localizations.dart

@@ -401,6 +401,18 @@ abstract class AppLocalizations {
   /// **'Send a message...'**
   String get sendMessage;
 
+  /// No description provided for @liveStreamEnded.
+  ///
+  /// In en, this message translates to:
+  /// **'The host has ended the live stream.'**
+  String get liveStreamEnded;
+
+  /// No description provided for @liveStreamEndedShort.
+  ///
+  /// In en, this message translates to:
+  /// **'Live stream ended'**
+  String get liveStreamEndedShort;
+
   /// No description provided for @liveChat.
   ///
   /// In en, this message translates to:

frontend/lib/l10n/app_localizations_en.dart

@@ -159,6 +159,12 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get sendMessage => 'Send a message...';
 
+  @override
+  String get liveStreamEnded => 'The host has ended the live stream.';
+
+  @override
+  String get liveStreamEndedShort => 'Live stream ended';
+
   @override
   String get liveChat => 'Live Chat';
 

frontend/lib/l10n/app_localizations_ja.dart

@@ -159,6 +159,12 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get sendMessage => 'メッセージを送信...';
 
+  @override
+  String get liveStreamEnded => '配信者が退出したため、ライブ配信は終了しました。';
+
+  @override
+  String get liveStreamEndedShort => 'ライブ配信は終了しました';
+
   @override
   String get liveChat => 'ライブチャット';
 

frontend/lib/l10n/app_localizations_zh.dart

@@ -158,6 +158,12 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get sendMessage => '发送消息...';
 
+  @override
+  String get liveStreamEnded => '主播已退出，直播已结束。';
+
+  @override
+  String get liveStreamEndedShort => '直播已结束';
+
   @override
   String get liveChat => '实时聊天';
 
@@ -364,6 +370,12 @@ class AppLocalizationsZhHant extends AppLocalizationsZh {
   @override
   String get sendMessage => '發送訊息...';
 
+  @override
+  String get liveStreamEnded => '主播已退出，直播已結束。';
+
+  @override
+  String get liveStreamEndedShort => '直播已結束';
+
   @override
   String get liveChat => '即時聊天';
 

frontend/lib/l10n/app_zh.arb

@@ -50,6 +50,8 @@
   "availableNow": "当前可用",
   "waitingForTranscoding": "正在等待后端转码输出",
   "sendMessage": "发送消息...",
+  "liveStreamEnded": "主播已退出，直播已结束。",
+  "liveStreamEndedShort": "直播已结束",
   "liveChat": "实时聊天",
   "refresh": "刷新",
   "volume": "音量",

frontend/lib/l10n/app_zh_Hant.arb

@@ -50,6 +50,8 @@
   "availableNow": "目前可用",
   "waitingForTranscoding": "正在等待後端轉碼輸出",
   "sendMessage": "發送訊息...",
+  "liveStreamEnded": "主播已退出，直播已結束。",
+  "liveStreamEndedShort": "直播已結束",
   "liveChat": "即時聊天",
   "refresh": "重新整理",
   "volume": "音量",