thymeleaf with grails 3.0.1

grails thymeleaf

build.gradle

dependencies {
    compile "org.springframework.boot:spring-boot-starter-logging"
    compile "org.springframework.boot:spring-boot-starter-actuator"
    compile "org.springframework.boot:spring-boot-autoconfigure"
    compile "org.springframework.boot:spring-boot-starter-tomcat"
    compile "org.springframework.boot:spring-boot-starter-thymeleaf" // add
    :

application.yml

environments:
    development:
        dataSource:
            dbCreate: create-drop
            url: jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
        spring:
            thymeleaf:
                prefix: file:./grails-app/views
                suffix: .html
                templateMode: HTML5
                cacheable: false
        :
    production:
        :
        spring:
            thymeleaf:
                prefix: classpath:/WEB-INF/grails-app/views
                suffix: .html
                templateMode: HTML5
                cacheable: true

resources.groovy

beans = {
    
    grailsThymeleafViewResolver(sample.GrailsThymeleafViewResolver) {
        characterEncoding = 'utf8'
        templateEngine = ref('templateEngine')
    }
    
    springConfig.addAlias 'thymeleafViewResolver', 'grailsThymeleafViewResolver'
    springConfig.addAlias 'jspViewResolver', 'thymeleafViewResolver'
}

sample.GrailsThymeleafViewResolver

package sample

import org.grails.web.servlet.view.GrailsViewResolver
import org.grails.web.util.WebUtils
import org.springframework.web.servlet.View
import org.thymeleaf.spring4.view.ThymeleafViewResolver

class GrailsThymeleafViewResolver
    extends ThymeleafViewResolver
        implements GrailsViewResolver {

    @Override
    public View resolveViewName(String viewName, Locale locale) throws Exception {
        return super.resolveViewName(WebUtils.addViewPrefix(viewName), locale);
    }
}

grails-app/views/layouts/main.html

<!doctype html>
<html lang="en" class="no-js"
  xmlns="http://www.w3.org/1999/xhtml"
  xmlns:th="http://www.thymeleaf.org"
  xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
        <title layout:replace="title">Grails</title>
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <link rel="stylesheet" href="../../assets/stylesheets/application.css" th:href="@{/assets/application.css}" />
        <script type="text/javascript" src="../../assets/javascripts/application.js" th:src="@{/assets/application.js}" ></script>
    </head>
    <body>
        <div id="grailsLogo" role="banner"><a href="http://grails.org"><img src="../../assets/images/grails_logo.png" alt="Grails" th:src="@{/assets/grails_logo.png}" /></a></div>
        <div layout:fragment="content"></div>
        <div class="footer" role="contentinfo"></div>
        <div id="spinner" class="spinner" style="display:none;" th:text="#{spinner.alt}">Loading&hellip;</div>
    </body>
</html>

grails-app/views/book/create.html

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
  xmlns:th="http://www.thymeleaf.org"
  xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
  layout:decorator="/layouts/main">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <title layout:replace="title" th:text="#{default.create.label(#{book.label})}">Create Book</title>
    </head>
    <body>
    <div layout:fragment="content">
    <p th:text="#{default.create.label(#{book.label})}">ppp</p>
    :