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/supabase/server.ts

@@ -0,0 +1,29 @@
+import { createServerClient } from "@supabase/ssr";
+import { cookies } from "next/headers";
+import type { Database } from "@/lib/database.types";
+
+export async function createClient() {
+  const cookieStore = await cookies();
+
+  return createServerClient<Database>(
+    process.env.NEXT_PUBLIC_SUPABASE_URL!,
+    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
+    {
+      cookies: {
+        getAll() {
+          return cookieStore.getAll();
+        },
+        setAll(cookiesToSet) {
+          try {
+            cookiesToSet.forEach(({ name, value, options }) =>
+              cookieStore.set(name, value, options)
+            );
+          } catch {
+            // Called from a Server Component — safe to ignore since the
+            // proxy already refreshes the session on every request.
+          }
+        },
+      },
+    }
+  );
+}