añadidor los ficheros que faltaban en el commit anterior

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

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+package com.imprimelibros.erp.config;
+
+import org.springframework.context.MessageSource;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.support.ReloadableResourceBundleMessageSource;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
+import org.springframework.web.servlet.LocaleResolver;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
+import org.springframework.web.servlet.i18n.SessionLocaleResolver;
+
+import java.io.IOException;
+import java.util.*;
+import java.util.stream.Collectors;
+
+@Configuration
+public class InternationalizationConfig implements WebMvcConfigurer {
+
+    @Bean
+    public LocaleResolver localeResolver() {
+        SessionLocaleResolver slr = new SessionLocaleResolver();
+        slr.setDefaultLocale(Locale.of("es"));
+        return slr;
+    }
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        LocaleChangeInterceptor interceptor = new LocaleChangeInterceptor();
+        interceptor.setParamName("lang");
+        registry.addInterceptor(interceptor);
+    }
+
+    @Bean
+    public MessageSource messageSource() throws IOException {
+        ReloadableResourceBundleMessageSource source = new ReloadableResourceBundleMessageSource();
+
+        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
+        Resource[] resources = resolver.getResources("classpath*:i18n/*.properties");
+
+        // Extraer los nombres base sin extensión ni sufijos (_en, _es, etc.)
+        Set<String> basenames = Arrays.stream(resources)
+            .map(res -> {
+                try {
+                    String uri = Objects.requireNonNull(res.getURI()).toString();
+                    // Ej: file:/.../i18n/login_en.properties
+                    String path = uri.substring(uri.indexOf("/i18n/") + 1); // i18n/login_en.properties
+                    String base = path.replaceAll("_[a-z]{2}\\.properties$", "") // login.properties
+                                      .replaceAll("\\.properties$", "");
+                    return "classpath:" + base;
+                } catch (IOException e) {
+                    return null;
+                }
+            })
+            .filter(Objects::nonNull)
+            .collect(Collectors.toSet());
+
+        source.setBasenames(basenames.toArray(new String[0]));
+        source.setDefaultEncoding("UTF-8");
+
+        return source;
+    }
+}

src/main/java/com/imprimelibros/erp/config/SecurityConfig.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.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.web.SecurityFilterChain;
+
+@Configuration
+public class SecurityConfig {
+
+    @Bean
+    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
+        http
+            .authorizeHttpRequests(auth -> auth
+                .requestMatchers("/", "/assets/**", "/css/**", "/js/**", "/images/**", "/public/**").permitAll()
+                .anyRequest().authenticated()
+            )
+            .formLogin(login -> login
+                //.loginPage("/login") añadir cuando se tenga login personalizado
+                .permitAll()
+            )
+            .logout(logout -> logout.permitAll());
+
+        return http.build();
+    }
+}

src/main/java/com/imprimelibros/erp/controller/HomeController.java

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+package com.imprimelibros.erp.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.MessageSource;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+
+import java.util.Locale;
+
+@Controller
+public class HomeController {
+
+    @Autowired
+    private MessageSource messageSource;
+
+    @GetMapping("/")
+    public String index(Model model, Locale locale) {
+        //model.addAttribute("title", messageSource.getMessage("t-home", null, locale));
+        model.addAttribute("title", "Inicio");
+        return "imprimelibros/home"; 
+    }
+}
+

src/main/java/com/imprimelibros/erp/controller/LoginController.java

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+package com.imprimelibros.erp.controller;
+
+import java.util.Locale;
+
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+
+public class LoginController {
+    
+     @GetMapping("/login")
+    public String index(Model model, Locale locale) {
+        return "imprimelibros/login/login"; 
+    }
+}