prepare messagePage layout

src/View/ChatPages/messagePage.tsx

@@ -1,13 +1,19 @@
+import "./messagePage.css";
+
 import * as React from "bloatless-react";
 
 import ChatViewModel from "../../ViewModel/chatViewModel";
 
 export function MessagePage(chatViewModel: ChatViewModel) {
   return (
-    <div>
+    <div id="message-page">
       <div class="toolbar">
         <span subscribe:innerText={chatViewModel.primaryChannel}></span>
       </div>
+      <div class="content">
+        <div id="message-container"></div>
+        <div id="composer"></div>
+      </div>
     </div>
   );
 }