Enhance file manager UI/UX and routing.

Improve layout, styling, file type badges, accessibility, and add cross-panel transfer actions from the context menu.

src/main/java/com/sftp/manager/config/WebConfig.java

@@ -3,6 +3,7 @@ package com.sftp.manager.config;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.servlet.config.annotation.CorsRegistry;
 import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 @Configuration
@@ -23,4 +24,10 @@ public class WebConfig implements WebMvcConfigurer {
         // registry.addResourceHandler("/**")
         //         .addResourceLocations("classpath:/static/");
     }
+
+    @Override
+    public void addViewControllers(ViewControllerRegistry registry) {
+        // 访问根路径时转发到静态首页 /static/index.html
+        registry.addViewController("/").setViewName("forward:/index.html");
+    }
 }