Replace fragment render functions with .sx defcomps

- Snippets list: render_snippets_list → render_to_sx("blog-snippets-content")
- Menu items list: render_menu_items_list → _render_menu_items_list helper
- Features panel: render_features_panel → render_to_sx("blog-features-panel-content")
- Markets panel: render_markets_panel → render_to_sx("blog-markets-panel-content")

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

blog/sx/settings.sx

@@ -54,6 +54,43 @@
       (button :type "submit"
         :class "bg-stone-800 text-white px-4 py-1.5 rounded text-sm hover:bg-stone-700" "Create"))))
 
+;; ---------------------------------------------------------------------------
+;; Data-driven composition defcomps — replace Python render_* functions
+;; ---------------------------------------------------------------------------
+
+;; Features panel composition — replaces render_features_panel
+(defcomp ~blog-features-panel-content (&key features-url calendar-checked market-checked
+                                            show-sumup sumup-url merchant-code placeholder
+                                            sumup-configured checkout-prefix)
+  (~blog-features-panel
+    :form (~blog-features-form
+      :features-url features-url
+      :calendar-checked calendar-checked
+      :market-checked market-checked
+      :hs-trigger "on change trigger submit on closest <form/>")
+    :sumup (when show-sumup
+      (~blog-sumup-form
+        :sumup-url sumup-url
+        :merchant-code merchant-code
+        :placeholder placeholder
+        :sumup-configured sumup-configured
+        :checkout-prefix checkout-prefix))))
+
+;; Markets panel composition — replaces render_markets_panel
+(defcomp ~blog-markets-panel-content (&key markets create-url)
+  (~blog-markets-panel
+    :list (if (empty? (or markets (list)))
+      (~blog-markets-empty)
+      (~blog-markets-list
+        :items (map (lambda (m)
+          (~blog-market-item
+            :name (get m "name")
+            :slug (get m "slug")
+            :delete-url (get m "delete_url")
+            :confirm-text (str "Delete market '" (get m "name") "'?")))
+          (or markets (list)))))
+    :create-url create-url))
+
 ;; Associated entries
 
 (defcomp ~blog-entry-image (&key src title)