feat(*.php, *.psql): deduplicate API code + performance improvements

src/includes/blocks/dialog.liquid

@@ -9,9 +9,15 @@
 <button class="dialog-open client-side" aria-label="{{ label }}" data-dialog-trigger="{{ dialogId }}" data-dialog-button>
   {{ labelContent }}
 </button>
-<dialog id="dialog-{{ dialogId }}" class="client-side">
+<dialog
+  id="dialog-{{ dialogId }}"
+  class="client-side"
+  {% if dynamic %}data-dynamic="{{ dynamic }}"{% endif %}
+  {% if markdown %}data-markdown="{{ markdown }}"{% endif %}>
   <button class="dialog-close" aria-label="Close dialog" data-dialog-button>
     {% tablericon "circle-x" %}
   </button>
+  {%- unless dynamic -%}
   {{ content }}
+  {%- endunless -%}
 </dialog>