UI: flatten preferences behavior tabs and add node parameter editor shortcut

- Move Behavior-General options (hover focus, slider ladder, scroll zooms)
  into the General preferences tab.
- Move Behavior-Audio option (audio scrubbing) into the Audio preferences tab.
- Promote remaining Behavior categories (Timeline, Playback, Project, Nodes,
  Rendering) to top-level sidebar entries without the 'Behavior - ' prefix.
- Update Chinese translations for the new sidebar titles and fill unfinished
  Behavior tab strings.

NodeView:
- Remove double-click jump-to-parameter-editor behavior; keep expand/collapse.
- Add right-click context menu item 'Show in Parameter Editor'.
- Add Shift+P shortcut bound to the same action.

Render:
- Fix crash in PreviewAutoCacher::ClearSingleFrameRenders when proxy playback
  causes a render ticket to finish synchronously before the watcher pointer is
  returned. Defer the watcher Finished signal via queued connection so the
  caller can safely register the watcher before it is deleted.

app/render/renderticket.cpp

@@ -157,9 +157,11 @@ void RenderTicketWatcher::SetTicket(RenderTicketPtr ticket)
 			&RenderTicketWatcher::TicketFinished);
 
 	if (!ticket_->IsRunning(false) && ticket_->GetFinishCount(false) > 0) {
-		// Ticket has already finished before, so we emit a signal
-		locker.unlock();
-		TicketFinished();
+		// Ticket has already finished before, so we emit a signal asynchronously
+		// to avoid deleting this watcher before the caller has a chance to use
+		// the returned pointer.
+		QMetaObject::invokeMethod(this, &RenderTicketWatcher::TicketFinished,
+								  Qt::QueuedConnection);
 	}
 }