refactor(events): finalize formatting and fix remaining native calls

- Corrected missed native 'event.preventDefault()' calls in badge form components.
- Applied batch formatting (printWidth: 80) to top-level event route files.

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

@@ -40,7 +40,7 @@
     ];
 
     async function handle_submit(event: Event) {
-        event.prevent_default();
+        event.preventDefault();
         submit_status = 'loading';
         const data_to_create: key_val = {
             full_name_override,

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

@@ -48,7 +48,7 @@
     }
 
     async function handle_upload(event: Event) {
-        event.prevent_default();
+        event.preventDefault();
         if (!selected_file) {
             upload_message = 'Please select a file first.';
             upload_status = 'error';