refac: switch to meta and params, remove source

src/lib/components/chat/Chat.svelte

@@ -343,7 +343,7 @@
 					const hasImages = messages.some((message) =>
 						message.files?.some((file) => file.type === 'image')
 					);
-					if (hasImages && !(model.custom_info?.params.vision_capable ?? true)) {
+					if (hasImages && !(model.custom_info?.meta.vision_capable ?? true)) {
 						toast.error(
 							$i18n.t('Model {{modelName}} is not vision capable', {
 								modelName: model.custom_info?.name ?? model.name ?? model.id