fix: Word and colour Windows workloads correctly across the UI

agent/internal/winexec/run_windows.go

@@ -19,12 +19,16 @@ func Run(ctx context.Context, script string) (string, error) {
 
 	out, err := cmd.Output()
 	if err != nil {
-		if ee, ok := err.(*exec.ExitError); ok && len(ee.Stderr) > 0 {
-			return "", fmt.Errorf("powershell: %s", strings.TrimSpace(string(ee.Stderr)))
-		}
+		// Checked before the ExitError/stderr branch: CommandContext kills the
+		// process on timeout, and that kill can itself produce an ExitError
+		// carrying stderr text, so a genuine timeout would otherwise surface
+		// as that stderr instead of the "timed out" message callers match on.
 		if ctx.Err() == context.DeadlineExceeded {
 			return "", fmt.Errorf("powershell: timed out")
 		}
+		if ee, ok := err.(*exec.ExitError); ok && len(ee.Stderr) > 0 {
+			return "", fmt.Errorf("powershell: %s", strings.TrimSpace(string(ee.Stderr)))
+		}
 		return "", fmt.Errorf("powershell: %w", err)
 	}
 	return string(out), nil