feat(rental): Sprint C — espace prestataire (signup+dashboard+items+calendrier+résa)

src/components/SiteHeader.tsx

@@ -15,6 +15,7 @@ export async function SiteHeader() {
   const u = session?.user;
   const isAdmin = u?.role === UserRole.ADMIN;
   const isOwner = u?.role === UserRole.OWNER || isAdmin;
+  const isRentalProvider = u?.role === UserRole.RENTAL_PROVIDER || isAdmin;
 
   return (
     <header className="sticky top-0 z-30 border-b border-zinc-200 bg-white/85 backdrop-blur supports-[backdrop-filter]:bg-white/70">
@@ -55,6 +56,11 @@ export async function SiteHeader() {
                   Espace hôte
                 </Link>
               ) : null}
+              {isRentalProvider ? (
+                <Link href="/espace-prestataire" className="hidden text-zinc-700 hover:text-zinc-900 sm:inline">
+                  Espace prestataire
+                </Link>
+              ) : null}
               {isAdmin ? (
                 <Link href="/admin" className="hidden rounded-md bg-zinc-900 px-2.5 py-1 text-xs font-semibold text-white hover:bg-zinc-800 sm:inline-block">
                   Admin