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/articles/+page.svelte

@@ -81,7 +81,7 @@
   </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.articles.search_placeholder")}
       class="max-w-xs"
@@ -110,7 +110,6 @@
       </SelectContent>
     </Select>
     <Button
-      size="sm"
       variant={data.featured === true ? "default" : "outline"}
       onclick={() => setFilter("featured", data.featured === true ? null : "true")}
     >