diff --git a/client/src/utils/debug_logger.rs b/client/src/utils/debug_logger.rs
index 6757f5b..5d96d18 100644
--- a/client/src/utils/debug_logger.rs
+++ b/client/src/utils/debug_logger.rs
@@ -33,8 +33,18 @@ impl io::Write for UiDebugWriter {
         let message = String::from_utf8_lossy(buf).trim().to_string();
         let is_error = message.starts_with("ERROR");
 
-        // Always keep in memory
-        buffer.push_back((message, is_error));
+        // Keep in memory for UI
+        buffer.push_back((message.clone(), is_error));
+
+        // ALSO log directly to file (non-blocking best effort)
+        if let Ok(mut file) = OpenOptions::new()
+            .create(true)
+            .append(true)
+            .open("ui_debug.log")
+        {
+            let _ = writeln!(file, "{message}");
+        }
+
         Ok(buf.len())
     }