重构项目结构，移除旧Java客户端，添加前后端目录

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/main/java/com/svnmanager/util/ConfigUtil.java

@@ -0,0 +1,162 @@
+package com.svnmanager.util;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.type.CollectionType;
+import com.svnmanager.model.Project;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+/**
+ * 配置管理工具类
+ */
+public class ConfigUtil {
+    private static final Logger logger = LoggerFactory.getLogger(ConfigUtil.class);
+    private static final String CONFIG_DIR = System.getProperty("user.home") + File.separator + ".svn-manager";
+    private static final String PROJECTS_FILE = CONFIG_DIR + File.separator + "projects.json";
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+    
+    static {
+        // 确保配置目录存在
+        try {
+            Path configPath = Paths.get(CONFIG_DIR);
+            if (!Files.exists(configPath)) {
+                Files.createDirectories(configPath);
+            }
+        } catch (IOException e) {
+            logger.error("创建配置目录失败", e);
+        }
+    }
+    
+    /**
+     * 加载项目列表
+     * 
+     * @return 项目列表
+     */
+    public static List<Project> loadProjects() {
+        File file = new File(PROJECTS_FILE);
+        if (!file.exists()) {
+            logger.info("项目配置文件不存在，返回空列表");
+            return new ArrayList<>();
+        }
+        
+        try {
+            CollectionType listType = objectMapper.getTypeFactory()
+                    .constructCollectionType(List.class, Project.class);
+            List<Project> projects = objectMapper.readValue(file, listType);
+            logger.info("成功加载 {} 个项目", projects.size());
+            return projects;
+        } catch (IOException e) {
+            logger.error("加载项目配置失败", e);
+            return new ArrayList<>();
+        }
+    }
+    
+    /**
+     * 保存项目列表
+     * 
+     * @param projects 项目列表
+     * @return 是否保存成功
+     */
+    public static boolean saveProjects(List<Project> projects) {
+        File file = new File(PROJECTS_FILE);
+        try {
+            objectMapper.writerWithDefaultPrettyPrinter().writeValue(file, projects);
+            logger.info("成功保存 {} 个项目", projects.size());
+            return true;
+        } catch (IOException e) {
+            logger.error("保存项目配置失败", e);
+            return false;
+        }
+    }
+    
+    /**
+     * 添加项目
+     * 
+     * @param project 项目
+     * @return 是否添加成功
+     */
+    public static boolean addProject(Project project) {
+        if (project.getId() == null || project.getId().isEmpty()) {
+            project.setId(UUID.randomUUID().toString());
+        }
+        
+        List<Project> projects = loadProjects();
+        projects.add(project);
+        return saveProjects(projects);
+    }
+    
+    /**
+     * 更新项目
+     * 
+     * @param project 项目
+     * @return 是否更新成功
+     */
+    public static boolean updateProject(Project project) {
+        List<Project> projects = loadProjects();
+        for (int i = 0; i < projects.size(); i++) {
+            if (projects.get(i).getId().equals(project.getId())) {
+                Project existing = projects.get(i);
+                // 密码留空时保留原密码
+                if (project.getPassword() == null || project.getPassword().isEmpty()) {
+                    project.setPassword(existing.getPassword());
+                }
+                projects.set(i, project);
+                return saveProjects(projects);
+            }
+        }
+        return false;
+    }
+    
+    /**
+     * 删除项目
+     * 
+     * @param projectId 项目ID
+     * @return 是否删除成功
+     */
+    public static boolean deleteProject(String projectId) {
+        List<Project> projects = loadProjects();
+        projects.removeIf(p -> p.getId().equals(projectId));
+        return saveProjects(projects);
+    }
+    
+    /**
+     * 根据ID获取项目
+     * 
+     * @param projectId 项目ID
+     * @return 项目，如果不存在返回null
+     */
+    public static Project getProjectById(String projectId) {
+        List<Project> projects = loadProjects();
+        return projects.stream()
+                .filter(p -> p.getId().equals(projectId))
+                .findFirst()
+                .orElse(null);
+    }
+    
+    /**
+     * 获取配置目录路径
+     * 
+     * @return 配置目录路径
+     */
+    public static String getConfigDir() {
+        return CONFIG_DIR;
+    }
+    
+    /**
+     * 获取项目配置文件路径
+     * 
+     * @return 项目配置文件路径
+     */
+    public static String getProjectsFilePath() {
+        return PROJECTS_FILE;
+    }
+}