Relayout of Augmented Part details page

app/templates/admin/_fit_other_points_select.html

@@ -1,12 +1,12 @@
 {% if points %}
-<select name="other_attachment_point_id" required>
+<select name="other_attachment_point_id" form="{{ form_id }}" required>
   <option value="">— select —</option>
   {% for p in points %}
     <option value="{{ p.id }}">{{ p.attachment_point_name.name }}</option>
   {% endfor %}
 </select>
 {% else %}
-<input type="hidden" name="other_attachment_point_id" value="">
+<input type="hidden" name="other_attachment_point_id" value="" form="{{ form_id }}">
 <p class="muted" style="font-size:0.85rem;margin:0">
   This part has no attachment points yet — one matching yours will be created automatically.
 </p>