fix(badges): remove transition from initial loader to fix double-DOM bounce

transition:fade on the initial spinner caused Svelte to keep the outgoing
element in the DOM for the full 200ms outro while the incoming badge list
was already rendered — both were live simultaneously, colliding on height
and producing the visible bounce. Initial cold-start load doesn't need a
transition; instant swap is fine.

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

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

@@ -1,6 +1,6 @@
 <script lang="ts">
 import { untrack } from 'svelte';
-import { slide, fade } from 'svelte/transition';
+import { slide } from 'svelte/transition';
 interface Props {
     /** @type {import('./$types').PageData} */
     data: any;
@@ -594,7 +594,6 @@ async function handle_search_refresh(params: any) {
 
 {#if $events_sess?.badges?.search_status === 'loading' && event_badge_id_li.length === 0}
     <div
-        transition:fade={{ duration: 200 }}
         class="flex w-full flex-col items-center justify-center p-16 text-center opacity-50">
         <LoaderCircle size="3em" class="mx-auto mb-2 animate-spin" />
         <p class="text-xl">Loading badges...</p>