trabajando en guardar presupuestos publicos

src/main/java/com/imprimelibros/erp/config/JpaAuditConfig.java

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+package com.imprimelibros.erp.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.domain.AuditorAware;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.core.userdetails.UserDetails;
+
+import com.imprimelibros.erp.users.User;
+
+import java.util.Optional;
+
+@Configuration
+@EnableJpaAuditing(auditorAwareRef = "auditorAware")
+public class JpaAuditConfig {
+
+    @Bean
+    public AuditorAware<User> auditorAware() {
+        return () -> {
+            Authentication auth = SecurityContextHolder.getContext().getAuthentication();
+            if (auth == null || !auth.isAuthenticated()) return Optional.empty();
+
+            Object principal = auth.getPrincipal();
+            if (principal instanceof User u) return Optional.of(u);
+
+            if (principal instanceof UserDetails ud) {
+                // Si tu principal es UserDetails y no la entidad User,
+                // aquí podrías cargar User por username si lo necesitas.
+                return Optional.empty();
+            }
+            return Optional.empty();
+        };
+    }
+}