fix(ui): resolve yacht owner names server-side, real user in topbar

Yachts list page rendered each row's Current Owner via OwnerLink, which
fired its own /api/v1/clients/{id} or /companies/{id} fetch — N+1 round-
trips per page load (12+ for the harbor-royale fixture). Worse, until
those fetches resolved each cell showed "Client c68da7..." style raw IDs.

Fix: listYachts now resolves the polymorphic currentOwnerName in two
batched in-array queries after the page query (mirrors the listClients
yachtCount/companyCount pattern), and OwnerLink accepts an optional
preloadedName prop that suppresses the per-row fetch when supplied.

Topbar: show real user name + avatar initial from session/profile, and
expand the My-Account dropdown header to include the user's email.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/yachts/yacht-detail-header.tsx

@@ -58,20 +58,27 @@ export function OwnerLink({
   portSlug,
   type,
   id,
+  preloadedName,
 }: {
   portSlug: string;
   type: 'client' | 'company';
   id: string;
+  /** Optional name supplied by the parent list/detail endpoint to skip the
+   *  per-row fetch (avoids an N+1 round-trip on lists). */
+  preloadedName?: string | null;
 }) {
+  // Only fetch when the parent didn't already supply a name — list endpoints
+  // batch-resolve owners server-side via a join.
   const { data } = useQuery<{ fullName?: string; name?: string }>({
     queryKey: [type === 'client' ? 'clients' : 'companies', id, 'name-only'],
     queryFn: () =>
       apiFetch<{ data: { fullName?: string; name?: string } }>(
         type === 'client' ? `/api/v1/clients/${id}` : `/api/v1/companies/${id}`,
       ).then((r) => r.data),
+    enabled: preloadedName === undefined || preloadedName === null,
   });
 
-  const label = type === 'client' ? data?.fullName : data?.name;
+  const label = preloadedName ?? (type === 'client' ? data?.fullName : data?.name);
   const href = type === 'client' ? `/${portSlug}/clients/${id}` : `/${portSlug}/companies/${id}`;
 
   return (