review-feedback: better PowerShell command pattern:

using -Command with $args[0] parameter passing instead of string interpolation.

backend/src/execution_monitor.rs

@@ -73,6 +73,7 @@ async fn commit_execution_changes(
 /// Play a system sound notification
 async fn play_sound_notification(sound_file: &crate::models::config::SoundFile) {
     // Use platform-specific sound notification
+    // Note: spawn() calls are intentionally not awaited - sound notifications should be fire-and-forget
     if cfg!(target_os = "macos") {
         let sound_path = sound_file.to_path();
         let _ = tokio::process::Command::new("afplay")
@@ -101,10 +102,26 @@ async fn play_sound_notification(sound_file: &crate::models::config::SoundFile)
                 .spawn();
         }
     } else if cfg!(target_os = "windows") {
-        let _ = tokio::process::Command::new("powershell")
-            .arg("-c")
-            .arg("[System.Media.SystemSounds]::Beep.Play()")
-            .spawn();
+        let sound_path = sound_file.to_path();
+        let current_dir = std::env::current_dir().unwrap_or_else(|e| {
+            tracing::error!("Failed to get current directory: {}", e);
+            std::path::PathBuf::from(".")
+        });
+        let absolute_path = current_dir.join(&sound_path);
+
+        if absolute_path.exists() {
+            let _ = tokio::process::Command::new("powershell")
+                .arg("-Command")
+                .arg("(New-Object Media.SoundPlayer $args[0]).PlaySync()")
+                .arg(absolute_path.to_string_lossy().as_ref())
+                .spawn();
+        } else {
+            // Fallback to system beep if sound file doesn't exist
+            let _ = tokio::process::Command::new("powershell")
+                .arg("-c")
+                .arg("[System.Media.SystemSounds]::Beep.Play()")
+                .spawn();
+        }
     }
 }