Fix comments UX regressions and HTMX/Turnstile behavior

- standardize comment and reply UI layout
- target replies with stable OOB container IDs
- remove stale empty-state on approved HTMX comments
- initialize Turnstile widgets after HTMX swaps
- add regression tests for empty-state, OOB targets, and reply form rerender

Refs #48

templates/comments/_comment.html

@@ -1,40 +1,36 @@
 <div class="group">
-  <!-- Top-level Comment -->
-  <article id="comment-{{ comment.id }}" class="relative bg-brand-surfaceLight dark:bg-brand-surfaceDark border border-zinc-200 dark:border-zinc-800 p-6 sm:p-8 hover:border-brand-pink/30 transition-colors">
-    <div class="flex items-start gap-4 mb-4">
-      <div class="w-10 h-10 bg-gradient-to-tr from-brand-cyan to-brand-pink shrink-0 rounded-sm shadow-solid-dark/10 dark:shadow-solid-light/5"></div>
-      <div class="flex-1 min-w-0">
-        <div class="flex flex-wrap items-baseline gap-x-3 gap-y-1">
-          <span class="font-display font-bold text-base text-zinc-900 dark:text-zinc-100">{{ comment.author_name }}</span>
-          <time datetime="{{ comment.created_at|date:'c' }}" class="font-mono text-xs text-zinc-500 uppercase tracking-wider">{{ comment.created_at|date:"M j, Y" }}</time>
-        </div>
-        <div class="mt-3 prose prose-sm dark:prose-invert max-w-none text-zinc-700 dark:text-zinc-300 leading-relaxed">
-          {{ comment.body|linebreaks }}
-        </div>
-      </div>
+  <article
+    id="comment-{{ comment.id }}"
+    data-comment-item="true"
+    class="rounded-lg border border-zinc-200 bg-brand-surfaceLight p-5 shadow-sm transition-colors hover:border-zinc-300 dark:border-zinc-800 dark:bg-brand-surfaceDark dark:hover:border-zinc-700 sm:p-6"
+  >
+    <header class="mb-3 flex flex-wrap items-center gap-x-3 gap-y-1">
+      <span class="font-display text-base font-bold text-zinc-900 dark:text-zinc-100">{{ comment.author_name }}</span>
+      <time datetime="{{ comment.created_at|date:'c' }}" class="font-mono text-[11px] uppercase tracking-wider text-zinc-500">
+        {{ comment.created_at|date:"M j, Y" }}
+      </time>
+    </header>
+
+    <div class="prose prose-sm mt-2 max-w-none leading-relaxed text-zinc-700 dark:prose-invert dark:text-zinc-300">
+      {{ comment.body|linebreaks }}
     </div>
 
-    <div class="flex items-center justify-between mt-6">
+    <div class="mt-5 flex items-center justify-between gap-4 border-t border-zinc-100 pt-4 dark:border-zinc-800">
       {% include "comments/_reactions.html" with comment=comment counts=comment.reaction_counts user_reacted=comment.user_reacted %}
-      
-      <details class="group/details">
-        <summary class="list-none cursor-pointer flex items-center gap-2 font-mono text-xs font-bold uppercase tracking-widest text-zinc-500 hover:text-brand-pink transition-colors [&::-webkit-details-marker]:hidden">
-          <svg class="w-4 h-4 transition-transform group-open/details:-translate-y-0.5 group-open/details:translate-x-0.5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
-            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M3 10h10a8 8 0 018 8v2M3 10l6 6m-6-6l6-6" />
-          </svg>
-          <span class="group-open/details:hidden">Reply</span>
-          <span class="hidden group-open/details:inline text-brand-pink">Cancel Reply</span>
-        </summary>
 
-        <div class="mt-8 pt-8 border-t border-zinc-100 dark:border-zinc-800 animate-in fade-in slide-in-from-top-2 duration-300">
+      <details class="group/details">
+        <summary class="list-none cursor-pointer font-mono text-xs font-bold uppercase tracking-wider text-zinc-500 transition-colors hover:text-brand-cyan [&::-webkit-details-marker]:hidden">
+          <span class="group-open/details:hidden">Reply</span>
+          <span class="hidden group-open/details:inline">Cancel reply</span>
+        </summary>
+        <div class="mt-4 rounded-md border border-zinc-200 bg-white p-4 dark:border-zinc-700 dark:bg-zinc-950">
           {% include "comments/_reply_form.html" with page=page comment=comment %}
         </div>
       </details>
     </div>
   </article>
 
-  <!-- Nested Replies -->
-  <div class="replies-container relative ml-6 sm:ml-12 mt-4 space-y-4 pl-6 sm:pl-8 border-l-2 border-zinc-100 dark:border-zinc-800">
+  <div id="replies-for-{{ comment.id }}" class="replies-container mt-3 space-y-3 border-l-2 border-zinc-100 pl-4 sm:ml-8 sm:pl-6 dark:border-zinc-800">
     {% for reply in comment.replies.all %}
       {% include "comments/_reply.html" with reply=reply %}
     {% endfor %}