feat: integrate customer service chat functionality and add socket.io-client dependency

- Implemented a customer service chat interface in the application.
- Added socket.io-client for real-time communication.
- Updated language files to include customer service related translations.
- Modified navigation to direct users to the customer service page.
- Enhanced UI elements for better user experience in chat interactions.

language/en.js

@@ -86,6 +86,7 @@ var en = {
 
   user: "User",
   userBalance: "Balance",
+  customerService: "Customer Service",
   logout: "Logout",
   tip: "Tip",
   logoutTip: "Are you sure to logout?",
@@ -178,6 +179,21 @@ var en = {
   chooseCoin: "Currency",
   flagshipHall: "Flagship Hall",
   liveHall: "Live hall",
+
+  // Customer Service
+  csConnected: "Connected",
+  csConnecting: "Connecting...",
+  csWelcome: "Welcome to Customer Service",
+  csBusy: "Agents are busy, please wait...",
+  csInputTip: "Please enter your question",
+  csInputPlaceholder: "Type a message and send...",
+  csSend: "Send",
+  csMe: "Me",
+  csAgent: "Agent",
+  csSessionEnded: "Session ended",
+  csAgentServing: "is serving you",
+  csAgentJoined: "has joined",
+  csConnectFailed: "Connection failed",
 };
 
 export { en };