feature: messages one to one

src/styles/chat/_index.scss

@@ -0,0 +1,3 @@
+.chat-view {
+  height: calc(100vh - 72px - 78px);
+}

src/styles/index.scss

@@ -49,3 +49,4 @@ solid-display>div {
 @import 'left-nav/_index';
 @import 'content/_index';
 @import 'about/_index';
+@import 'chat/_index';