Scaffold V1: auth, profils et leaderboard

Next.js 16 + Tailwind + Supabase (Auth, Postgres, Storage). Connexion
par pseudo/mot de passe via email interne dérivé, RLS avec points
protégés au niveau colonne, pages login/signup/leaderboard/profile.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/profile/page.tsx

@@ -0,0 +1,31 @@
+import { redirect } from "next/navigation";
+import { createClient } from "@/lib/supabase/server";
+import { ProfileForm } from "./profile-form";
+
+export default async function ProfilePage() {
+  const supabase = await createClient();
+  const {
+    data: { user },
+  } = await supabase.auth.getUser();
+
+  if (!user) {
+    redirect("/login");
+  }
+
+  const { data: profile } = await supabase
+    .from("profiles")
+    .select("pseudo, avatar_url")
+    .eq("id", user.id)
+    .single();
+
+  return (
+    <div className="mx-auto w-full max-w-sm px-4 py-8">
+      <h1 className="mb-6 text-2xl font-semibold text-navy">Mon profil</h1>
+      <ProfileForm
+        userId={user.id}
+        initialPseudo={profile?.pseudo ?? ""}
+        initialAvatarUrl={profile?.avatar_url ?? null}
+      />
+    </div>
+  );
+}