hopefully fix remote desktop issue

Overlord-Client/cmd/agent/capture/win_duplication.go

@@ -717,7 +717,7 @@ func (s *duplicationState) capture(display int) (*image.RGBA, error) {
 		return nil, fmt.Errorf("dxgi: acquire frame failed 0x%x", hr)
 	}
 	if resource != nil {
-		resource.Release()
+		defer resource.Release()
 	}
 
 	width := int(s.desc.ModeDesc.Width)

Overlord-Client/cmd/agent/session.go

@@ -679,14 +679,16 @@ func runSession(ctx context.Context, cancel context.CancelFunc, conn *websocket.
 			}
 		}()
 
-		if err := readLoop(ctx, conn, env, dispatcher); err != nil {
-			log.Printf("readLoop ended: %v", err)
-			select {
-			case readErr <- err:
-			default:
-			}
-			cancel()
+		err := readLoop(ctx, conn, env, dispatcher)
+		if err == nil {
+			err = fmt.Errorf("readLoop exited unexpectedly")
 		}
+		log.Printf("readLoop ended: %v", err)
+		select {
+		case readErr <- err:
+		default:
+		}
+		cancel()
 	}()
 
 	shotCtx, cancelShots := context.WithCancel(ctx)