feat(utils): 添加 io_error 辅助函数用于 IO 错误上下文包装

将匿名 os error 包装为包含操作描述和路径的友好错误信息,
避免出现无法定位问题来源的原始系统错误。

src/utils/file.rs

@@ -1,16 +1,22 @@
-use crate::error::Result;
+use crate::error::{CliError, Result};
 use serde_json::Value;
-use std::{fs, path::PathBuf};
+use std::{
+    fs, io,
+    path::{Path, PathBuf},
+};
 
 pub fn read_file_to_json(path: &PathBuf) -> Result<Value> {
-    let file = fs::read_to_string(path)?;
-    let json: Value = serde_json::from_str(&file)?;
-    Ok(json)
+    let content = fs::read_to_string(path).map_err(|e| io_error("读取文件", path, e))?;
+    serde_json::from_str(&content).map_err(|e| {
+        CliError::InvalidData(format!("解析 JSON '{}' 失败: {}", path.display(), e))
+    })
 }
 
 pub fn write_json_to_file(path: &PathBuf, value: &Value) -> Result<()> {
-    let content = serde_json::to_string_pretty(value)?;
-    fs::write(path, content)?;
+    let content = serde_json::to_string_pretty(value).map_err(|e| {
+        CliError::InvalidData(format!("序列化 JSON '{}' 失败: {}", path.display(), e))
+    })?;
+    fs::write(path, content).map_err(|e| io_error("写入文件", path, e))?;
     Ok(())
 }
 
@@ -28,3 +34,12 @@ pub fn find_project_dir(path: &Option<String>) -> Result<PathBuf> {
     let path = path.as_deref().unwrap_or(".");
     Ok(PathBuf::from(path))
 }
+
+/// Wraps an [`io::Error`] with the operation name and path so error messages
+/// stop being anonymous "os error 3" strings.
+pub fn io_error(op: &str, path: &Path, err: io::Error) -> CliError {
+    CliError::Io(io::Error::new(
+        err.kind(),
+        format!("{} '{}' 失败: {}", op, path.display(), err),
+    ))
+}