feat(security): 重构安全配置并添加用户认证功能

refactor: 将ResponseMessage移动到config包并增强功能
feat: 添加用户管理相关功能及密码加密配置
fix: 修复HelpController中README文件路径问题
docs: 更新application.properties配置注释
style: 清理无用导入和日志文件

src/main/java/com/qf/myafterprojecy/config/CustomUserDetailsService.java

@@ -0,0 +1,53 @@
+package com.qf.myafterprojecy.config;
+
+import com.qf.myafterprojecy.pojo.Users;
+import com.qf.myafterprojecy.repository.UsersRepository;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.stereotype.Component;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * 自定义的UserDetailsService实现
+ * 用于从数据库加载用户信息进行认证
+ */
+@Component
+public class CustomUserDetailsService implements UserDetailsService {
+
+    private static final Logger logger = LoggerFactory.getLogger(CustomUserDetailsService.class);
+
+    @Autowired
+    private UsersRepository usersRepository;
+
+    @Override
+    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
+        logger.info("用户登录认证: {}", username);
+        
+        // 从数据库中查询用户
+        Users user = usersRepository.findByUsername(username)
+                .orElseThrow(() -> new UsernameNotFoundException("用户不存在: " + username));
+        
+        // 转换用户角色为Spring Security的权限
+        // 根据role字段的值设置不同的角色权限
+        String role = "ROLE_USER"; // 默认角色
+        if (user.getRole() == 1) {
+            role = "ROLE_ADMIN"; // 管理员角色
+        }
+        
+        List<SimpleGrantedAuthority> authorities = Collections.singletonList(new SimpleGrantedAuthority(role));
+        
+        // 返回Spring Security的User对象
+        return new org.springframework.security.core.userdetails.User(
+                user.getUsername(),
+                user.getPassword(),
+                authorities
+        );
+    }
+}