Fix Emails page structuredClone error on load

Clone from the raw API response instead of the $state proxy.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VvKPBTwMK2SLDNUp5SxR7A

panel/web/src/pages/Emails.svelte

@@ -26,9 +26,10 @@
 
   async function load() {
     try {
-      data = await get<Data>('/api/admin/email');
-      templates = structuredClone(data.templates);
-      if (!groupId && data.groups[0]) groupId = data.groups[0].id;
+      const d = await get<Data>('/api/admin/email');
+      data = d;
+      templates = structuredClone(d.templates);
+      if (!groupId && d.groups[0]) groupId = d.groups[0].id;
     } catch (e) { toastError(e); }
   }
   onMount(() => { load(); const i = setInterval(() => get<Data>('/api/admin/email').then((d) => data && (data.log = d.log)).catch(() => {}), 5000); return () => clearInterval(i); });