Phase 2完成：Tauri管理工具开发 + Phase 1双虚拟目录实现

Phase 1成果：
- 数据库准备：demo.sqlite（117文件，5.07GB）
- 双虚拟Tree：demo_library_zh + demo_library_en
- 文件分类映射：258个节点（自动分类）

Phase 2成果：
- Tauri项目初始化：完整项目结构
- 7个管理模块：安装/配置/诊断/管理/健康/监控/文件浏览
- 7个Rust Commands：完整后端逻辑（约3000行）
- 7个Vue页面：完整前端UI（约2000行）
- Vite build修复：Rolldown外部化配置成功
- 前端构建成功：dist目录生成

总体进度：90%完成（约5000行代码）

markbase-tauri/src-tauri/src/commands/config.rs

@@ -0,0 +1,125 @@
+use serde::{Deserialize, Serialize};
+use std::fs;
+use std::path::PathBuf;
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct AppConfig {
+    pub database: DatabaseConfig,
+    pub web_server: WebServerConfig,
+    pub ssh: SSHConfig,
+    pub nfs: NFSConfig,
+    pub smb: SMBConfig,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct DatabaseConfig {
+    pub path: String,
+    pub max_connections: u32,
+    pub auto_backup: bool,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct WebServerConfig {
+    pub port: u32,
+    pub enable_ssl: bool,
+    pub ssl_cert_path: Option<String>,
+    pub enable_auth: bool,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct SSHConfig {
+    pub enabled: bool,
+    pub port: u32,
+    pub enable_sftp: bool,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct NFSConfig {
+    pub enabled: bool,
+    pub mount_point: String,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct SMBConfig {
+    pub enabled: bool,
+    pub share_name: String,
+}
+
+impl Default for AppConfig {
+    fn default() -> Self {
+        AppConfig {
+            database: DatabaseConfig {
+                path: "data/users".to_string(),
+                max_connections: 10,
+                auto_backup: true,
+            },
+            web_server: WebServerConfig {
+                port: 11438,
+                enable_ssl: false,
+                ssl_cert_path: None,
+                enable_auth: false,
+            },
+            ssh: SSHConfig {
+                enabled: false,
+                port: 2222,
+                enable_sftp: false,
+            },
+            nfs: NFSConfig {
+                enabled: false,
+                mount_point: "/mnt/markbase".to_string(),
+            },
+            smb: SMBConfig {
+                enabled: false,
+                share_name: "markbase".to_string(),
+            },
+        }
+    }
+}
+
+fn get_config_path() -> PathBuf {
+    PathBuf::from("config/markbase.json")
+}
+
+#[tauri::command]
+pub async fn load_config() -> Result<AppConfig, String> {
+    let config_path = get_config_path();
+    
+    if !config_path.exists() {
+        let default_config = AppConfig::default();
+        save_config(default_config.clone()).await?;
+        return Ok(default_config);
+    }
+    
+    let config_str = fs::read_to_string(&config_path)
+        .map_err(|e| format!("Failed to read config file: {}", e))?;
+    
+    let config: AppConfig = serde_json::from_str(&config_str)
+        .map_err(|e| format!("Failed to parse config file: {}", e))?;
+    
+    Ok(config)
+}
+
+#[tauri::command]
+pub async fn save_config(config: AppConfig) -> Result<(), String> {
+    let config_path = get_config_path();
+    
+    if let Some(parent) = config_path.parent() {
+        fs::create_dir_all(parent)
+            .map_err(|e| format!("Failed to create config directory: {}", e))?;
+    }
+    
+    let config_str = serde_json::to_string_pretty(&config)
+        .map_err(|e| format!("Failed to serialize config: {}", e))?;
+    
+    fs::write(&config_path, config_str)
+        .map_err(|e| format!("Failed to write config file: {}", e))?;
+    
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn reset_config() -> Result<AppConfig, String> {
+    let default_config = AppConfig::default();
+    save_config(default_config.clone()).await?;
+    Ok(default_config)
+}