backend: move all header and pager display out of layout

templates/exception.html.ep

@@ -1,2 +1,3 @@
 % layout "main";
 % title "Error";
+<h1><%= title %></h1>

templates/gallery.html.ep

@@ -1,4 +1,5 @@
 % layout "main";
+<h1><%= title %></h1>
 
 <div class="flex-c-horizontal flex-c-wrap gallery">
 % for my $m ($media->@*) {
@@ -7,3 +8,5 @@
   <% end %>
 % }
 </div>
+
+%= include "_pager";

templates/layouts/main.html.ep

@@ -18,13 +18,7 @@
   </header>
   <main class="flex-i-fullsize flex-c-vertical">
     <div class="viewport flex-i-fullsize flex-c-vertical">
-% if (defined title) {
-      <h1><%= title %></h1>
-% }
-      <div class="flex-i-fullsize">
 %= content 
-      </div>
-%= include "_pager"
     </div>
   </main>
   <footer class="border-top">

templates/media.html.ep

@@ -19,6 +19,8 @@
 % } else {
   <dd><%= c($media->{tags}->@*)
     ->map(sub { link_to $_ => url_for("tag_show", tag_id_or_name => $_) })
-    ->join(", ") %>.</dd>
+    ->join(", ") %></dd>
 % }
 </dl>
+
+%= include "_pager";

templates/not_found.html.ep

@@ -1,2 +1,3 @@
 % layout "main";
 % title "Not Found";
+<h1><%= title %></h1>

templates/tags.html.ep

@@ -1,7 +1,10 @@
 % layout "main";
+<h1><%= title %></h1>
 
 <p class="text-center">
 % for my $t ($tags->@*) {
   <%= link_to $t->{name} => $t->{uri} %>(<%= $t->{count} %>)
 % }
 </p>
+
+%= include "_pager";