diff --git a/api/src/chat/chat.service.ts b/api/src/chat/chat.service.ts
index 437a9f3..6325c06 100644
--- a/api/src/chat/chat.service.ts
+++ b/api/src/chat/chat.service.ts
@@ -78,6 +78,7 @@ export class ChatService {
   }
 
   private databaseUrl() {
-    return this.config.get<string>('FIREBASE_DATABASE_URL')?.replace(/\/$/, '') ?? '';
+    const configured = this.config.get<string>('FIREBASE_DATABASE_URL')?.replace(/\/$/, '') ?? '';
+    return configured || 'https://sinka-8ec10-default-rtdb.firebaseio.com';
   }
 }
diff --git a/docker-compose.yml b/docker-compose.yml
index b060e62..efd67d1 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -55,6 +55,7 @@ services:
       MYSQL_ADMIN_URL: mysql://root:${MYSQL_ROOT_PASSWORD:-root}@mysql:3306
       REDIS_URL: redis://redis:6379
       UPLOAD_DIR: /data/uploads
+      FIREBASE_DATABASE_URL: ${FIREBASE_DATABASE_URL:-https://sinka-8ec10-default-rtdb.firebaseio.com}
     volumes:
       - sinka_uploads:/data/uploads
     ports:
diff --git a/web/src/components/restricted-shell.tsx b/web/src/components/restricted-shell.tsx
index 9def6e3..7775b9a 100644
--- a/web/src/components/restricted-shell.tsx
+++ b/web/src/components/restricted-shell.tsx
@@ -66,7 +66,7 @@ export function RestrictedShell({
 
   const links =
     kind === "platform"
-      ? [{ href: "/admin", label: "Empresas" }]
+      ? [{ href: "/admin", label: "Clientes" }]
       : [
           { href: basePath, label: "Dashboard" },
           { href: `${basePath}/simular`, label: "Simular" },
@@ -86,10 +86,30 @@ export function RestrictedShell({
     return (
       <div className="min-h-dvh bg-black text-[#E8F4E5]">
         <header className="border-b border-white/10">
-          <div className="mx-auto flex max-w-6xl items-center justify-between gap-4 px-5 py-4">
-            <Link href={basePath}>
-              <Image src="/brand/sinka-logo.webp" alt="Sinka" width={160} height={52} className="h-7 w-auto" />
-            </Link>
+          <div className="mx-auto flex max-w-6xl flex-wrap items-center justify-between gap-4 px-5 py-4">
+            <div className="flex flex-wrap items-center gap-8">
+              <Link href={basePath}>
+                <Image src="/brand/sinka-logo.webp" alt="Sinka" width={160} height={52} className="h-7 w-auto" />
+              </Link>
+              <nav className="flex items-center gap-6 text-base">
+                {links.map((link) => {
+                  const active = pathname === link.href;
+                  return (
+                    <Link
+                      key={link.href}
+                      href={link.href}
+                      className={
+                        active
+                          ? "font-medium text-[#82C85C]"
+                          : "text-[#E8F4E5]/70 transition hover:text-[#E8F4E5]"
+                      }
+                    >
+                      {link.label}
+                    </Link>
+                  );
+                })}
+              </nav>
+            </div>
             <div className="flex items-center gap-3 text-sm">
               <div className="hidden text-right sm:block">
                 <p className="font-medium">{user.name}</p>
diff --git a/web/src/components/support-chat.tsx b/web/src/components/support-chat.tsx
index 58a1ff8..43ad5e0 100644
--- a/web/src/components/support-chat.tsx
+++ b/web/src/components/support-chat.tsx
@@ -94,6 +94,11 @@ export function SupportChat({
   return (
     <section className="flex min-h-[28rem] flex-col">
       <p className="text-xs font-semibold uppercase tracking-[0.28em] text-[#82C85C]">Chat</p>
+      {user?.kind === "platform" ? (
+        <a href="/admin" className="mt-4 inline-flex text-sm text-[#82C85C] hover:underline">
+          Voltar para clientes
+        </a>
+      ) : null}
       <h1 className="font-display mt-2 text-4xl font-extrabold uppercase">{heading}</h1>
       {error ? <p className="mt-4 text-sm text-red-300">{error}</p> : null}