fix(configurator): hide essentials card in Advanced mode

In Advanced mode the full token catalogue is already visible and responds
to the Modified-only and Internal filters. Showing a separate unfiltered
Essentials card alongside it broke both filters from the user's perspective:
the curated tokens stayed on screen regardless of filter state, making it
look like the checkboxes had no effect on most rows.

Fix: gate the Essentials card behind `!advanced` — the same guard used for
the Basic curated forms. The Advanced catalogue contains every essential
token anyway, so nothing is lost; filters now work exactly as expected.

https://claude.ai/code/session_01MAgtQ7JY16X2TqZZyGfkuu

Author: claude

configurator/src/components/DomainPanel.svelte

@@ -228,7 +228,7 @@
         />
       {/if}
 
-      <!-- Essentials (always shown when present) -->
+      <!-- Essentials (Basic mode only) -->
       {#if domain.brandColors}
         <!-- Brand colors domain: light/dark pair rows for every brand color -->
         <section class="cfg-card panel__card">
@@ -255,12 +255,15 @@
             </div>
           </section>
         {/each}
-      {:else if essentials.length}
+      {:else if !advanced && essentials.length}
+        <!-- In Advanced mode the full filtered catalogue covers everything;
+             showing essentials here would bypass the Modified-only / Internal
+             filters and confuse the user with duplicated unfiltered rows. -->
         <section class="cfg-card panel__card">
           {@render cardHead(
             'Essentials',
             essentials.length,
-            advanced ? '' : `Curated for most projects · switch to Advanced (A) for the full ${domainTokens.length}-token catalogue.`
+            `Curated for most projects · switch to Advanced (A) for the full ${domainTokens.length}-token catalogue.`
           )}
           <div class="panel__card-rows">
             {#each essentials as token (token.name)}