ui: fix audio and video modality detection (#23756)

When model props are fetched asynchronously from the server,
modelPropsVersion is incremented to trigger reactivity, but
only the vision effect was listening to it.

tools/ui/src/lib/components/app/chat/ChatForm/ChatFormActions/ChatFormActionModels.svelte

@@ -106,10 +106,14 @@
 	});
 
 	$effect(() => {
+		void modelPropsVersion;
+
 		hasAudioModality = activeModelId ? modelsStore.modelSupportsAudio(activeModelId) : false;
 	});
 
 	$effect(() => {
+		void modelPropsVersion;
+
 		hasVideoModality = activeModelId ? modelsStore.modelSupportsVideo(activeModelId) : false;
 	});