refactor(core): move app para src e padroniza estrutura

src/features/auth/components/auth-error-alert.tsx

@@ -0,0 +1,17 @@
+import { RiTerminalLine } from "@remixicon/react";
+import { Alert, AlertDescription } from "@/shared/components/ui/alert";
+
+interface AuthErrorAlertProps {
+	error: string;
+}
+
+export function AuthErrorAlert({ error }: AuthErrorAlertProps) {
+	if (!error) return null;
+
+	return (
+		<Alert className="mt-2 border border-destructive" variant="destructive">
+			<RiTerminalLine className="h-4 w-4" />
+			<AlertDescription>{error}</AlertDescription>
+		</Alert>
+	);
+}