feat(dashboard): persist notification center state

src/shared/lib/notifications/is-table-missing.ts

@@ -0,0 +1,16 @@
+/**
+ * Detecta se um erro indica que a tabela `dashboard_notification_states`
+ * ainda nao existe no banco (migration pendente).
+ */
+export function isNotificationStatesTableMissing(error: unknown): boolean {
+	if (!(error instanceof Error)) {
+		return false;
+	}
+
+	const message = error.message.toLowerCase();
+
+	return (
+		message.includes("dashboard_notification_states") &&
+		(message.includes("does not exist") || message.includes("relation"))
+	);
+}