新增AI的功能与页面，扩展了国际化功能

client/src/locales/data-en.json

@@ -485,5 +485,60 @@
     "selectedYet": "Target curve not selected yet",
     "leftChannel": "Left channel",
     "rightChannel": "Right channel"
+  },
+  "ai": {
+    "title": "Luxsin AI",
+    "welcomeTitle": "Hi, I'm Luxsin AI",
+    "welcomeDescription": "I can help you check and adjust {device} settings, analyze headphone frequency response, optimize EQ, or answer usage questions.",
+    "suggestionsLabel": "Try asking",
+    "suggestions": [
+      { "title": "Optimize my EQ", "prompt": "Please optimize my current EQ — I want clearer vocals." },
+      { "title": "Recommend Pop EQ", "prompt": "Recommend a set of EQ parameters suitable for pop music." },
+      { "title": "Check device status", "prompt": "Show me the current volume, input source and output port." },
+      { "title": "Switch input source", "prompt": "Switch the input source to USB-C." }
+    ],
+    "inputPlaceholder": "Ask about your device, EQ, effects…",
+    "thinking": "Thinking…",
+    "stopped": "(Stopped)",
+    "requestFailed": "Request failed. Please try again later.",
+    "ariaSend": "Send",
+    "ariaStop": "Stop",
+    "ariaNewChat": "New chat",
+    "ariaHistory": "History",
+    "ariaClose": "Close",
+    "clearCurrent": "Clear this chat",
+    "cleared": "Current chat cleared",
+    "clearFailed": "Clear failed: {message}",
+    "deviceRequired": "Please connect a device first",
+    "deviceDisconnected": "Device disconnected",
+    "loadHistoryFailed": "Failed to load history: {message}",
+    "loadChatFailed": "Failed to load chat: {message}",
+    "toolResultFailed": "Failed to send tool result: {message}",
+    "history": {
+      "title": "Chat history",
+      "newChat": "Start a new chat",
+      "empty": "No chat history yet",
+      "current": "Current"
+    },
+    "optimize": {
+      "badge": "Optimization",
+      "applied": "Applied",
+      "summary": "{count} filters · preamp {preamp} dB",
+      "compare": "Compare",
+      "apply": "Apply",
+      "rollback": "Rollback",
+      "applySuccess": "New EQ applied",
+      "rollbackSuccess": "Rolled back to original EQ",
+      "applyFailed": "Operation failed: {message}"
+    },
+    "compareDialog": {
+      "title": "EQ comparison",
+      "legendBefore": "Before",
+      "legendAfter": "After",
+      "close": "Close",
+      "apply": "Apply this optimization",
+      "rollback": "Rollback to original",
+      "paramSummary": "{count} filters · preamp {preamp} dB"
+    }
   }
 }