Initial commit: WaMarket MVP

Marketplace inversée (Next.js 16 App Router + Supabase Cloud) : auth,
schéma + RLS, publication de besoins avec upload d'images, feed avec
filtres, offres, acceptation via RPC, messagerie temps réel,
dashboards, et Dockerfile pour déploiement Coolify.

lib/dal.ts

@@ -0,0 +1,18 @@
+import "server-only";
+import { cache } from "react";
+import { redirect } from "next/navigation";
+import { createClient } from "@/lib/supabase/server";
+
+export const getCurrentUser = cache(async () => {
+  const supabase = await createClient();
+  const { data } = await supabase.auth.getClaims();
+  const claims = data?.claims;
+  if (!claims) return null;
+  return { id: claims.sub as string, email: claims.email as string | undefined };
+});
+
+export const verifySession = cache(async () => {
+  const user = await getCurrentUser();
+  if (!user) redirect("/auth/login");
+  return user;
+});