use 'me' instead of 'user' consistently

views/threads/thread.etlua

@@ -1,4 +1,4 @@
-<% render("views.common.topnav", {user = user}) -%>
+<% render("views.common.topnav") -%>
 <main>
   <nav id="threadnav">
     <h1 class="thread-title"><%= thread.title %></h1>
@@ -13,7 +13,7 @@
   <% render("views.common.pagination", {page_count = pages, current_page = page}) %>
 </nav>
 
-<% if not user:is_guest() then %>
+<% if not me:is_guest() then %>
 <h1>Respond to "<%= thread.title %>"</h1>
 <form method="post">
   <textarea id="post_content" name="post_content" placeholder="Response body" required></textarea><br>