feat: add user_id index to profiles table for faster lookups

The new index on the `user_id` column in the `profiles` table improves query performance for user-specific profile retrieval operations, reducing full table scans during authentication and profile loading workflows.

devplacepy/templates/_post_votes.html

@@ -0,0 +1,11 @@
+<div class="post-votes">
+    <form method="POST" action="/votes/post/{{ _uid }}" class="inline-form">
+        <input type="hidden" name="value" value="1">
+        <button type="submit" class="post-action-btn vote-up{% if _my_vote == 1 %} voted{% endif %}">+</button>
+    </form>
+    <span class="post-vote-count" data-vote-count="{{ _uid }}">{{ _count }}</span>
+    <form method="POST" action="/votes/post/{{ _uid }}" class="inline-form">
+        <input type="hidden" name="value" value="-1">
+        <button type="submit" class="post-action-btn vote-down{% if _my_vote == -1 %} voted{% endif %}">−</button>
+    </form>
+</div>