新增AI的功能与页面，扩展了国际化功能

client/src/locales/data-zh-HK.json

@@ -299,5 +299,60 @@
     "selectedYet": "你尚未選擇目標曲線",
     "leftChannel": "左聲道",
     "rightChannel": "右聲道"
+  },
+  "ai": {
+    "title": "Luxsin AI",
+    "welcomeTitle": "你好，我是 Luxsin AI",
+    "welcomeDescription": "可以幫你查詢與調整 {device} 的設定，分析耳機頻響、優化 EQ，或者解答使用上的疑問。",
+    "suggestionsLabel": "試試這樣問",
+    "suggestions": [
+      { "title": "優化我的 EQ", "prompt": "幫我優化目前 EQ，我希望人聲更清晰一些" },
+      { "title": "推薦流行樂 EQ", "prompt": "推薦一套適合聽流行音樂的 EQ 參數" },
+      { "title": "查看裝置狀態", "prompt": "幫我查看目前的音量、輸入源和輸出埠" },
+      { "title": "切換輸入源", "prompt": "把輸入源切換到 USB-C" }
+    ],
+    "inputPlaceholder": "問問關於裝置、EQ、音效……",
+    "thinking": "思考中…",
+    "stopped": "（已停止）",
+    "requestFailed": "請求失敗，請稍後重試",
+    "ariaSend": "發送",
+    "ariaStop": "停止",
+    "ariaNewChat": "新增會話",
+    "ariaHistory": "歷史會話",
+    "ariaClose": "關閉",
+    "clearCurrent": "清空目前會話",
+    "cleared": "已清空目前會話",
+    "clearFailed": "清空失敗：{message}",
+    "deviceRequired": "請先連接裝置",
+    "deviceDisconnected": "裝置未連接",
+    "loadHistoryFailed": "載入歷史失敗：{message}",
+    "loadChatFailed": "載入會話失敗：{message}",
+    "toolResultFailed": "工具結果回傳失敗：{message}",
+    "history": {
+      "title": "歷史會話",
+      "newChat": "開始新會話",
+      "empty": "暫無歷史會話",
+      "current": "目前"
+    },
+    "optimize": {
+      "badge": "優化記錄",
+      "applied": "已套用",
+      "summary": "{count} 個濾波器 · 總增益 {preamp} dB",
+      "compare": "對比",
+      "apply": "套用",
+      "rollback": "回滾",
+      "applySuccess": "已套用新的 EQ",
+      "rollbackSuccess": "已回滾到原 EQ",
+      "applyFailed": "操作失敗：{message}"
+    },
+    "compareDialog": {
+      "title": "EQ 對比",
+      "legendBefore": "優化前",
+      "legendAfter": "優化後",
+      "close": "關閉",
+      "apply": "套用此優化",
+      "rollback": "回滾到優化前",
+      "paramSummary": "{count} 段 · preamp {preamp} dB"
+    }
   }
 }