diff --git a/src-tauri/src/commands/misc.rs b/src-tauri/src/commands/misc.rs
index 4a41d65..6885493 100644
--- a/src-tauri/src/commands/misc.rs
+++ b/src-tauri/src/commands/misc.rs
@@ -1,5 +1,7 @@
 // Miscellaneous commands — CLI args, URL opening, frontend telemetry
 
+use crate::error::AppError;
+
 #[tauri::command]
 pub fn cli_get_group() -> Option<String> {
     let args: Vec<String> = std::env::args().collect();
@@ -18,14 +20,14 @@ pub fn cli_get_group() -> Option<String> {
 }
 
 #[tauri::command]
-pub fn open_url(url: String) -> Result<(), String> {
+pub fn open_url(url: String) -> Result<(), AppError> {
     if !url.starts_with("http://") && !url.starts_with("https://") {
-        return Err("Only http/https URLs are allowed".into());
+        return Err(AppError::validation("Only http/https URLs are allowed"));
     }
     std::process::Command::new("xdg-open")
         .arg(&url)
         .spawn()
-        .map_err(|e| format!("Failed to open URL: {e}"))?;
+        .map_err(|e| AppError::internal(format!("Failed to open URL: {e}")))?;
     Ok(())
 }