Add room creation options endpoint and integrate with chat UI: Implement getRoomCreateOptions in ChatController and ChatService, add corresponding API route, and enhance MultiChatDialog for room creation with localized labels and validation. Update i18n files for new room creation features.

backend/controllers/chatController.js

@@ -13,6 +13,7 @@ class ChatController {
     this.sendOneToOneMessage = this.sendOneToOneMessage.bind(this);
     this.getOneToOneMessageHistory = this.getOneToOneMessageHistory.bind(this);
     this.getRoomList = this.getRoomList.bind(this);
+    this.getRoomCreateOptions = this.getRoomCreateOptions.bind(this);
   }
 
   async getMessages(req, res) {
@@ -175,6 +176,15 @@ class ChatController {
       res.status(500).json({ error: error.message });
     }
   }
+
+  async getRoomCreateOptions(req, res) {
+    try {
+      const options = await chatService.getRoomCreateOptions();
+      res.status(200).json(options);
+    } catch (error) {
+      res.status(500).json({ error: error.message });
+    }
+  }
 }
 
 export default ChatController;