adds user's public show page

app/views/users/show.html.erb

@@ -0,0 +1,15 @@
+<h1><%= avatar_image(@user, seed: @user.id, size: 60) %> <%= @user.name %></h1>
+
+<dl class="sub-nav">
+  <% @valid_filters.each do |filter| %>
+    <% if @activity_counts[filter] > 0 %>
+      <% if @current_filter == filter %>
+        <dd class="active"> <%= t("users.show.filters.#{filter}", count: @activity_counts[filter]) %></dd>
+      <% else %>
+        <dd><%= link_to t("users.show.filters.#{filter}", count: @activity_counts[filter]),
+          current_path_with_query_params(filter: filter, page: 1) %></dd>
+      <% end %>
+    <% end %>
+  <% end %>
+  <%= t("users.show.no_activity") if @activity_counts.values.inject(&:+) == 0 %>
+</dl>