fix: align admin filter toggle buttons with search input height

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

packages/frontend/src/routes/admin/videos/+page.svelte

@@ -78,7 +78,7 @@
   </div>
 
   <!-- Filters -->
-  <div class="flex flex-wrap gap-3 mb-4 px-3 sm:px-0">
+  <div class="flex flex-wrap items-center gap-3 mb-4 px-3 sm:px-0">
     <Input
       placeholder={$_("admin.videos.search_placeholder")}
       class="max-w-xs"
@@ -90,21 +90,18 @@
     />
     <div class="flex gap-1">
       <Button
-        size="sm"
         variant={data.featured === undefined ? "default" : "outline"}
         onclick={() => setFilter("featured", null)}
       >
         {$_("admin.common.all")}
       </Button>
       <Button
-        size="sm"
         variant={data.featured === true ? "default" : "outline"}
         onclick={() => setFilter("featured", "true")}
       >
         {$_("admin.common.featured")}
       </Button>
       <Button
-        size="sm"
         variant={data.premium === true ? "default" : "outline"}
         onclick={() => setFilter("premium", data.premium === true ? null : "true")}
       >