Access permissions, seed permissions, security, session, api/session improved handling + speed across the site/UX improvements

frontend/src/routes/client-access/+page.svelte

@@ -151,14 +151,6 @@
   const previewJson = $derived(JSON.stringify(exportPreview, null, 2));
 </script>
 
-<section class="page-intro">
-  <div>
-    <p class="eyebrow">Client Amend Area</p>
-    <h2>Control new users, existing users, and every feature flag in one operational workspace.</h2>
-    <p>The preview shows the live Power BI export payload after each amendment so the admin surface and reporting output stay aligned.</p>
-  </div>
-</section>
-
 <section class="metric-row">
   <article class="metric-card">
     <span>Total Clients</span>