Merge pull request 'feat：语音对话优化' (#106) from feat/onload into develop

Reviewed-on: http://8.161.227.145:3000/XEngineers/CamTalk/pulls/106

frontend/src/lib/i18n/en-US.ts

@@ -54,6 +54,8 @@ export const enUS: TranslationMap = {
   "chat.title": "Chat",
   "chat.mode.observation": "Observing",
   "chat.reconnecting": "Connection lost, reconnecting...",
+  "chat.connecting": "Connecting to server...",
+  "chat.vadInit": "Initializing voice detection...",
   "chat.empty.prompt": "Type below to start chatting",
   "chat.empty.hint": "Type to chat with AI, or click the button on the left to start video",
   "chat.welcome.prompt": "Type below to start chatting",
@@ -65,6 +67,7 @@ export const enUS: TranslationMap = {
   // Session messages
   "session.changeDetected": "👁️ Scene change detected",
   "session.recognizing": "(Recognizing speech...)",
+  "session.sttFailed": "(Speech recognition failed, please try again)",
   "session.noSpeech": "(No speech detected)",
   "session.interrupted": "(Interrupted)",
 

frontend/src/lib/i18n/ja-JP.ts

@@ -54,6 +54,8 @@ export const jaJP: TranslationMap = {
   "chat.title": "チャット",
   "chat.mode.observation": "観察モード",
   "chat.reconnecting": "接続が切断されました。再接続中...",
+  "chat.connecting": "サーバーに接続中...",
+  "chat.vadInit": "音声検出を初期化中...",
   "chat.empty.prompt": "下にテキストを入力して対話を開始",
   "chat.empty.hint": "テキストでAIと対話、または左のボタンでビデオ通話を開始",
   "chat.welcome.prompt": "下にテキストを入力して対話を開始",
@@ -65,6 +67,7 @@ export const jaJP: TranslationMap = {
   // Session messages
   "session.changeDetected": "👁️ シーン変化を検出",
   "session.recognizing": "（音声認識中...）",
+  "session.sttFailed": "（音声認識に失敗しました。もう一度お試しください）",
   "session.noSpeech": "（音声が検出されませんでした）",
   "session.interrupted": "（中断済み）",
 

frontend/src/lib/i18n/zh-CN.ts

@@ -54,6 +54,8 @@ export const zhCN: TranslationMap = {
   "chat.title": "对话",
   "chat.mode.observation": "观察模式",
   "chat.reconnecting": "连接已断开，正在重连...",
+  "chat.connecting": "正在连接服务...",
+  "chat.vadInit": "正在初始化语音检测...",
   "chat.empty.prompt": "在下方输入文字开始对话",
   "chat.empty.hint": "输入文字即可与 AI 交互，也可点击左侧按钮开启视频",
   "chat.welcome.prompt": "在下方输入文字开始对话",
@@ -65,6 +67,7 @@ export const zhCN: TranslationMap = {
   // Session messages
   "session.changeDetected": "👁️ 画面变化检测",
   "session.recognizing": "（语音识别中...）",
+  "session.sttFailed": "（语音识别失败，请重试）",
   "session.noSpeech": "（未识别到语音）",
   "session.interrupted": "（已打断）",