refactor: 代码清理 — 删除 AppError、重命名 replacePaths、修正 detectExportFormat、统一 PATH 长度、优化 BOM 检查、添加同步注释

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

src-tauri/src/commands/registry.rs

@@ -63,6 +63,8 @@ pub fn save_user_paths(paths: Vec<String>) -> Result<(), String> {
     save_paths(HKEY_CURRENT_USER, USER_REG_PATH, "用户", &paths)
 }
 
+/// 将分号分隔的 PATH 字符串拆分为数组。
+/// 注意：TS 端 src/core/validation.ts 有相同逻辑的 split_path，修改时需同步两端。
 pub(crate) fn split_path(raw: &str) -> Vec<String> {
     raw.split(';')
         .map(|s| s.trim().to_string())

src-tauri/src/error.rs

@@ -1,36 +0,0 @@
-use serde::Serialize;
-
-/// 传给前端的统一错误类型（保留供未来迁移使用，届时所有命令改为返回 Result<T, AppError>）
-#[allow(dead_code)]
-#[derive(Debug, Serialize)]
-pub struct AppError {
-    pub message: String,
-}
-
-impl std::fmt::Display for AppError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.message)
-    }
-}
-
-impl From<&str> for AppError {
-    fn from(s: &str) -> Self {
-        AppError {
-            message: s.to_string(),
-        }
-    }
-}
-
-impl From<String> for AppError {
-    fn from(s: String) -> Self {
-        AppError { message: s }
-    }
-}
-
-impl From<std::io::Error> for AppError {
-    fn from(e: std::io::Error) -> Self {
-        AppError {
-            message: format!("IO 错误: {}", e),
-        }
-    }
-}

src-tauri/src/lib.rs

@@ -1,5 +1,4 @@
 mod commands;
-mod error;
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {