fix(zoom): hide focus overlay for auto zoom regions

Auto zoom regions use cursor follow, so the blue draggable focus
boundary is hidden and pointer events disabled.

src/components/video-editor/videoPlayback/overlayUtils.ts

@@ -13,7 +13,7 @@ interface OverlayUpdateParams {
 export function updateOverlayIndicator(params: OverlayUpdateParams) {
   const { overlayEl, indicatorEl, region, focusOverride, baseMask, isPlaying } = params;
 
-  if (!region) {
+  if (!region || region.mode === 'auto') {
     indicatorEl.style.display = 'none';
     overlayEl.style.pointerEvents = 'none';
     return;