fix(badges): correct templates link URL — /events/[id]/templates not /badges/templates

Route group (badges) is parenthetical and doesn't contribute a URL segment.

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

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

@@ -486,7 +486,7 @@ async function handle_search_refresh(params: any) {
     <div transition:slide={{ duration: 200 }} class="flex flex-row gap-1 items-center justify-center">
     {#if $ae_loc.manager_access}
         <a
-            href="/events/{$events_slct?.event_id}/badges/templates"
+            href="/events/{$events_slct?.event_id}/templates"
             class="btn btn-sm preset-tonal-surface border-surface-300-700 border">
             <LayoutTemplate size="1em" />
             Templates