fix: remove unused rayon import and resolve compilation error

src-tauri/src/main.rs

@@ -3,7 +3,7 @@
     windows_subsystem = "windows"
 )]
 
-use sysinfo::{System, Pid};
+use sysinfo::System;
 use std::sync::Mutex;
 use std::process::Command;
 use tauri::State;
@@ -14,7 +14,6 @@ use std::fs;
 use clap::Parser;
 use std::path::PathBuf;
 use std::time::Duration;
-use rayon::prelude::*;
 
 // --- CLI ---