add offset pagination and permalinking to posts

views/threads/thread.etlua

@@ -1,10 +1,11 @@
 <h1><%= thread.title %></h1>
 <p>Posted under <a href="<%= url_for("topic", {slug = topic.slug}) %>"><%= topic.name %></a>
 <% for _, post in ipairs(posts) do %>
-  <div>
+  <div id="post-<%= post.id %>">
     <img src="<%= post.avatar_path or "/avatars/default.webp" %>"><br>
     <a href="<%= url_for("user", {username = post.username}) %>"><%= post.username %></a>
     <div><p><%- post.content %></p></div>
+    <a href="#post-<%= post.id %>">permalink</a>
   </div>
 <% end %>
 
@@ -15,8 +16,12 @@
   <input type="submit" value="Reply">
 </form>
 <% end %>
-<% if next_cursor then %>
-  <a href="<%= url_for('thread', {slug = thread.slug}, {cursor = next_cursor}) %>">
-    Older posts →
-  </a>
+<span>
+<% for i = 1, math.max(pages, 1) do %>
+  <% if i == page then %>
+    <%= tostring(i)%>
+  <% else %>
+    <a href="?page=<%= i %>"><%= tostring(i)%></a>
+  <% end %>
 <% end %>
+</span>