disable Stable loader version type if there are no stable loader versions available (#6114)

* disable Stable loader version if there are no stable loader versions

* deselect stable if stable is disabled

packages/ui/src/components/flows/creation-flow-modal/components/CustomSetupStage.vue

@@ -93,6 +93,8 @@
 						v-if="!isPaperLike"
 						v-model="loaderVersionType"
 						:items="loaderVersionTypeItems"
+						:disabled-items="loaderVersionTypeDisabledItems"
+						:disabled-tooltip="'No such versions available'"
 						:format-label="formatLoaderVersionTypeLabel"
 					/>
 					<div v-if="isPaperLike || loaderVersionType === 'other'">
@@ -296,6 +298,11 @@ const tags = injectTags()
 
 const loaderVersionTypeItems: LoaderVersionType[] = ['stable', 'latest', 'other']
 
+const loaderVersionTypeDisabledItems = computed<LoaderVersionType[]>(() => {
+	const noStableVersions = !loaderVersionsData.value.some((v: LoaderVersionEntry) => v.stable)
+	return noStableVersions ? ['stable'] : []
+})
+
 const isPaperLike = computed(
 	() => selectedLoader.value === 'paper' || selectedLoader.value === 'purpur',
 )
@@ -565,6 +572,13 @@ function autoSelectLoaderVersion() {
 		'first:',
 		loaderVersionsData.value[0]?.id,
 	)
+	if (
+		loaderVersionType.value === 'stable' &&
+		loaderVersionTypeDisabledItems.value.includes('stable')
+	) {
+		debug("'stable' loader version type is disabled, switching to 'latest'...")
+		loaderVersionType.value = 'latest'
+	}
 	if (loaderVersionType.value === 'stable') {
 		const stable = loaderVersionsData.value.find((v) => v.stable)
 		selectedLoaderVersion.value = stable?.id ?? loaderVersionsData.value[0]?.id ?? null