Skip the swatch levels when the picker draws nothing

Without profiles the component renders nothing, so it should not read the scheme
file once per contrast level first.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

resources/views/components/scheme-picker.blade.php

@@ -36,7 +36,7 @@
     // colours — so the binding below never asks whether a level is there.
     $swatches = [];
 
-    foreach (\NoNameWeb\LivewireMaterial\Support\Scheme::LEVELS as $level) {
+    foreach ($profiles === [] ? [] : \NoNameWeb\LivewireMaterial\Support\Scheme::LEVELS as $level) {
         $generated = $level === 'standard' ? [] : \NoNameWeb\LivewireMaterial\Support\Scheme::profiles(contrast: $level);
 
         foreach ($profiles as $profile => $scheme) {