Improved flat review timing by a lot.

internal/atspi/adapter_tree_native.go

@@ -220,7 +220,16 @@ func captureNativeTree(ctx context.Context, root *C.AtspiAccessible, reviewBusNa
 			}
 		}
 
-		cachedChildren := known && !cached.childrenInvalid
+		// Visual review cannot use descendants of hidden controls. Inactive
+		// notebook pages and closed GTK combo menus can expose thousands of
+		// children; traversing them can exhaust the entire capture deadline.
+		// Keep semantic document and desktop/object capture complete.
+		reviewOnly := !document && reviewBusName != ""
+		captureChildren := !reviewOnly || !geometry.VisibilityKnown ||
+			(geometry.Visible && geometry.Showing) || snapshot.Role == "application" || snapshot.Role == "desktop frame"
+		// A visibility change can reveal children omitted by an earlier review
+		// capture, even when the provider emits no children-changed event.
+		cachedChildren := known && !cached.childrenInvalid && (!reviewOnly || !cached.geometryInvalid)
 		for _, id := range cached.children {
 			if cache.sources[id] == nil {
 				cachedChildren = false
@@ -229,7 +238,9 @@ func captureNativeTree(ctx context.Context, root *C.AtspiAccessible, reviewBusNa
 		}
 		var childCountError *C.GError
 		childCount := len(cached.children)
-		if !cachedChildren {
+		if !captureChildren {
+			childCount = 0
+		} else if !cachedChildren {
 			// Snapshot refresh above already cleared dirty entries. Clearing
 			// again discards the state and interface data just fetched.
 			childCount = int(C.atspi_accessible_get_child_count(source, &childCountError))