add level page to index, slight tweaks

public/template/index.ecr

@@ -37,6 +37,7 @@
         <el>
           <li>The <a href="https://git.oat.zone/oat/crystal-gauntlet">Git repository</a></li>
           <li><a href="/tools/song_upload">Song reuploading</a></li>
+          <li><a href="/tools/levels">Levels</a></li>
           <li><a href="https://oat.zone/f/geometry_dash_gdpstest.oat.zone.zip"><i>Completely legal</i> executable download</a></li>
         </el>
       </p>

public/template/levels.ecr

@@ -85,7 +85,7 @@
     <%- end -%>
     </div>
     <div class="pagination">
-      <%- if total_levels > ((page + 1) * levels_per_page) && page > 0 -%>
+      <%- if page > 0 -%>
         <a href="?page=<%= page - 1 %>"><</a>
       <%- end -%>
       <%- if total_levels > ((page + 1) * levels_per_page) -%>

src/template_endpoints/levels.cr

@@ -7,6 +7,6 @@ levels_per_page = 10
 CrystalGauntlet.template_endpoints["/tools/levels"] = ->(context : HTTP::Server::Context): String {
   page = (context.request.query_params["page"]? || "0").to_i? || 0
   total_levels = DATABASE.scalar("select count(*) from levels").as(Int64)
-  levels = DATABASE.query_all("select levels.id, name, users.username, levels.community_difficulty, levels.difficulty, levels.featured, levels.epic from levels left join users on levels.user_id = users.id limit #{levels_per_page} offset #{page * levels_per_page}", as: {Int32, String, String, Int32?, Int32?, Bool, Bool})
+  levels = DATABASE.query_all("select levels.id, name, users.username, levels.community_difficulty, levels.difficulty, levels.featured, levels.epic from levels left join users on levels.user_id = users.id order by levels.id desc limit #{levels_per_page} offset #{page * levels_per_page}", as: {Int32, String, String, Int32?, Int32?, Bool, Bool})
   ECR.render("./public/template/levels.ecr")
 }