cameleer-deploy-demo/src/main/java/com/cameleer/deploy/config/SpaConfig.java

package com.cameleer.deploy.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * Serves the SPA frontend. All non-API, non-static paths forward to index.html
 * so that client-side routing works.
 */
@Configuration
public class SpaConfig implements WebMvcConfigurer {
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        // Forward non-API paths to index.html for SPA routing
        registry.addViewController("/").setViewName("forward:/index.html");
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**")
                .addResourceLocations("classpath:/static/", "file:static/");
    }
}