使用rust which包来查找命令路径，解决部分电脑环境变量识别问题

src-tauri/src/acp/connection.rs

@@ -131,9 +131,13 @@ async fn build_agent(
                 parts.push(format!("{k}={v}"));
             }
             parts.push(
-                crate::process::normalized_program(cmd)
-                    .to_string_lossy()
-                    .to_string(),
+                which::which(cmd)
+                    .map(|p| p.to_string_lossy().to_string())
+                    .unwrap_or_else(|_| {
+                        crate::process::normalized_program(cmd)
+                            .to_string_lossy()
+                            .to_string()
+                    }),
             );
             for a in args {
                 parts.push((*a).into());

src-tauri/src/acp/preflight.rs

@@ -93,14 +93,24 @@ async fn check_npm_environment(node_required: Option<&str>) -> Vec<CheckItem> {
         return checks;
     }
 
-    // Run node and npm checks in parallel
+    // Resolve absolute paths via `which` crate to avoid GUI PATH issues,
+    // then run version checks in parallel.
+    let node_path = which::which("node").ok();
+    let npm_path = which::which("npm").ok();
+
     let (node_result, npm_result) = tokio::join!(
-        crate::process::tokio_command("node")
-            .arg("--version")
-            .output(),
-        crate::process::tokio_command("npm")
-            .arg("--version")
-            .output(),
+        async {
+            match &node_path {
+                Some(p) => crate::process::tokio_command(p).arg("--version").output().await,
+                None => Err(std::io::Error::new(std::io::ErrorKind::NotFound, "node not found in PATH")),
+            }
+        },
+        async {
+            match &npm_path {
+                Some(p) => crate::process::tokio_command(p).arg("--version").output().await,
+                None => Err(std::io::Error::new(std::io::ErrorKind::NotFound, "npm not found in PATH")),
+            }
+        },
     );
 
     // Track the raw node version string for reuse in the version check

src-tauri/src/commands/acp.rs

@@ -81,27 +81,15 @@ fn package_name_from_spec(package: &str) -> String {
 /// Check whether a command is available on the system PATH.
 /// Uses `which` on unix and `where` on windows — lightweight and does not
 /// invoke the target binary itself, avoiding side-effects or slow startups.
-async fn is_cmd_available(cmd: &str) -> bool {
-    #[cfg(unix)]
-    let check_cmd = "which";
-    #[cfg(windows)]
-    let check_cmd = "where";
-
-    crate::process::tokio_command(check_cmd)
-        .arg(cmd)
-        .stdout(std::process::Stdio::null())
-        .stderr(std::process::Stdio::null())
-        .status()
-        .await
-        .map(|s| s.success())
-        .unwrap_or(false)
+fn is_cmd_available(cmd: &str) -> bool {
+    which::which(cmd).is_ok()
 }
 
 async fn detect_local_version(agent_type: AgentType) -> Option<String> {
     let meta = registry::get_agent_meta(agent_type);
     match meta.distribution {
         registry::AgentDistribution::Npx { cmd, package, .. } => {
-            if is_cmd_available(cmd).await {
+            if is_cmd_available(cmd) {
                 version_from_package_spec(package)
             } else {
                 None
@@ -1047,7 +1035,7 @@ pub async fn acp_connect(
     }
 
     if let registry::AgentDistribution::Npx { cmd, .. } = meta.distribution {
-        if !is_cmd_available(cmd).await {
+        if !is_cmd_available(cmd) {
             return Err(AcpError::protocol(format!(
                 "{} SDK is not installed. Please install it in Agent Settings.",
                 meta.name