fix: match pagination button size to admin filter buttons (default size)

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

packages/frontend/src/lib/components/pagination/pagination.svelte

@@ -34,7 +34,6 @@
   <div class="flex items-center gap-1">
     <Button
       variant="outline"
-      size="sm"
       disabled={currentPage <= 1}
       onclick={() => onPageChange(currentPage - 1)}
     >
@@ -46,7 +45,6 @@
       {:else}
         <Button
           variant={p === currentPage ? "default" : "outline"}
-          size="sm"
           class="min-w-9"
           onclick={() => onPageChange(p)}
         >
@@ -56,7 +54,6 @@
     {/each}
     <Button
       variant="outline"
-      size="sm"
       disabled={currentPage >= totalPages}
       onclick={() => onPageChange(currentPage + 1)}
     >