feat: PATH 配置文件/预设切换 — 保存、加载、一键应用不同场景的 PATH 配置

- 新增 profiles.rs: list/save/load/delete/rename 五个 Rust 命令
- 配置文件存储在 %APPDATA%/.patheditor/profiles/<name>.json
- ProfileDialog: 保存当前 PATH、加载预览、一键应用到注册表
- 工具栏新增「配置」按钮

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src-tauri/src/commands/mod.rs

@@ -1,6 +1,7 @@
 pub mod backup;
 pub mod disabled;
 pub mod fs;
+pub mod profiles;
 pub mod registry;
 pub mod scanner;
 pub mod system;

src-tauri/src/commands/profiles.rs

@@ -0,0 +1,147 @@
+use serde::{Deserialize, Serialize};
+use std::fs;
+use std::path::PathBuf;
+
+fn profiles_dir() -> PathBuf {
+    dirs::data_dir()
+        .or_else(dirs::home_dir)
+        .unwrap_or_else(|| PathBuf::from("."))
+        .join(".patheditor")
+        .join("profiles")
+}
+
+fn profile_path(name: &str) -> PathBuf {
+    profiles_dir().join(format!("{}.json", name))
+}
+
+/// 内部用的 PathEntry（与前端 PathEntry 字段一致）
+#[derive(Serialize, Deserialize, Clone)]
+pub struct ProfilePathEntry {
+    pub path: String,
+    pub enabled: bool,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct ProfileMeta {
+    pub name: String,
+    pub created: String,
+    pub modified: String,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct ProfileData {
+    pub name: String,
+    pub sys: Vec<ProfilePathEntry>,
+    pub user: Vec<ProfilePathEntry>,
+    pub created: String,
+    pub modified: String,
+}
+
+/// 列出所有配置文件的元数据
+#[tauri::command]
+pub fn list_profiles() -> Result<Vec<ProfileMeta>, String> {
+    let dir = profiles_dir();
+    if !dir.exists() {
+        return Ok(vec![]);
+    }
+
+    let mut profiles: Vec<ProfileMeta> = Vec::new();
+    let entries = fs::read_dir(&dir).map_err(|e| format!("无法读取配置目录: {}", e))?;
+
+    for entry in entries.flatten() {
+        let path = entry.path();
+        if path.extension().map_or(true, |e| e != "json") {
+            continue;
+        }
+        let content = fs::read_to_string(&path)
+            .map_err(|e| format!("无法读取 {}: {}", path.display(), e))?;
+        if let Ok(data) = serde_json::from_str::<ProfileData>(&content) {
+            profiles.push(ProfileMeta {
+                name: data.name,
+                created: data.created,
+                modified: data.modified,
+            });
+        }
+    }
+
+    profiles.sort_by(|a, b| a.name.cmp(&b.name));
+    Ok(profiles)
+}
+
+/// 保存当前 PATH 为配置文件
+#[tauri::command]
+pub fn save_profile(
+    name: String,
+    sys: Vec<ProfilePathEntry>,
+    user: Vec<ProfilePathEntry>,
+) -> Result<(), String> {
+    let dir = profiles_dir();
+    fs::create_dir_all(&dir).map_err(|e| format!("无法创建配置目录: {}", e))?;
+
+    let path = profile_path(&name);
+    let now = chrono::Local::now().format("%Y-%m-%dT%H:%M:%S").to_string();
+
+    let data = ProfileData {
+        name,
+        sys,
+        user,
+        created: now.clone(),
+        modified: now,
+    };
+
+    let json =
+        serde_json::to_string_pretty(&data).map_err(|e| format!("JSON 序列化失败: {}", e))?;
+    fs::write(&path, &json).map_err(|e| format!("无法写入配置文件: {}", e))?;
+
+    log::info!("已保存配置: {}", path.display());
+    Ok(())
+}
+
+/// 加载配置文件
+#[tauri::command]
+pub fn load_profile(name: String) -> Result<ProfileData, String> {
+    let path = profile_path(&name);
+    if !path.exists() {
+        return Err(format!("配置文件不存在: {}", name));
+    }
+    let content = fs::read_to_string(&path)
+        .map_err(|e| format!("无法读取配置文件: {}", e))?;
+    serde_json::from_str(&content)
+        .map_err(|e| format!("JSON 解析失败: {}", e))
+}
+
+/// 删除配置文件
+#[tauri::command]
+pub fn delete_profile(name: String) -> Result<(), String> {
+    let path = profile_path(&name);
+    fs::remove_file(&path).map_err(|e| format!("无法删除配置文件: {}", e))?;
+    log::info!("已删除配置: {}", path.display());
+    Ok(())
+}
+
+/// 重命名配置文件
+#[tauri::command]
+pub fn rename_profile(old_name: String, new_name: String) -> Result<(), String> {
+    let old_path = profile_path(&old_name);
+    if !old_path.exists() {
+        return Err(format!("配置文件不存在: {}", old_name));
+    }
+
+    let mut data: ProfileData =
+        serde_json::from_str(&fs::read_to_string(&old_path).map_err(|e| format!("无法读取配置文件: {}", e))?).map_err(|e| format!("JSON 解析失败: {}", e))?;
+
+    data.name = new_name.clone();
+    data.modified = chrono::Local::now().format("%Y-%m-%dT%H:%M:%S").to_string();
+
+    let new_path = profile_path(&new_name);
+    let json =
+        serde_json::to_string_pretty(&data).map_err(|e| format!("JSON 序列化失败: {}", e))?;
+    fs::write(&new_path, &json).map_err(|e| format!("无法写入配置文件: {}", e))?;
+
+    if old_path != new_path {
+        fs::remove_file(&old_path).map_err(|e| format!("无法删除旧配置文件: {}", e))?;
+    }
+
+    log::info!("已重命名配置: {} -> {}", old_name, new_name);
+    Ok(())
+}

src-tauri/src/lib.rs

@@ -30,6 +30,11 @@ pub fn run() {
             commands::disabled::load_disabled_state,
             commands::scanner::scan_conflicts,
             commands::scanner::scan_tools,
+            commands::profiles::list_profiles,
+            commands::profiles::save_profile,
+            commands::profiles::load_profile,
+            commands::profiles::delete_profile,
+            commands::profiles::rename_profile,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");