ui(badges): show template name on create form when only one exists

Single-template events auto-select silently but gave no visual
confirmation. Added a read-only display of the template name so staff
can verify the correct template is in use before submitting.

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

src/routes/events/[event_id]/(badges)/badges/ae_comp__badge_create_form.svelte

@@ -221,9 +221,14 @@ let step_label = $derived(
         <p class="text-error-600 dark:text-error-400 text-sm font-medium">
             No badge templates are configured for this event. Set up a template before creating badges.
         </p>
-    {:else if template_li.length > 1}
-        <!-- Template selector — only shown when the event has multiple templates.
-             Single-template events auto-select silently; the selector would just add noise. -->
+    {:else if template_li.length === 1}
+        <!-- Single template — auto-selected. Show it so the user can confirm. -->
+        <div class="text-sm">
+            <span class="text-surface-500">Badge Template:</span>
+            <span class="text-surface-900-50 font-medium">{template_li[0].name}</span>
+        </div>
+    {:else}
+        <!-- Multiple templates — let the user pick; always pre-selected to first. -->
         <label class="label">
             <span class="label-text">Badge Template</span>
             <select bind:value={selected_template_id} class="select">