Initial logic for release notes

ts/components/conversation/ConversationHeader.tsx

@@ -631,6 +631,19 @@ function HeaderMenu({
             </MenuItem>
           )}
         </SubMenu>
+        {conversation.isArchived ? (
+          <MenuItem onClick={onConversationUnarchive}>
+            {i18n('icu:moveConversationToInbox')}
+          </MenuItem>
+        ) : (
+          <MenuItem onClick={onConversationArchive}>
+            {i18n('icu:archiveConversation')}
+          </MenuItem>
+        )}
+
+        <MenuItem onClick={onConversationDeleteMessages}>
+          {i18n('icu:deleteConversation')}
+        </MenuItem>
       </ContextMenu>
     );
   }