feat: add thumbnail timeout and low-memory warning

app/components/settings/SettingsVideoProcessingFields.vue

@@ -1,13 +1,34 @@
 <script setup lang="ts">
 const { transcodeToHls, loadPreferences } = useUploadPreferences('video')
 const { t } = useI18n()
+const {
+  lowMemory,
+  memoryBytes,
+  load: loadTranscodeSettings
+} = useTranscodeSettings()
+
+const memoryGb = computed(() => (
+  memoryBytes.value > 0
+    ? (memoryBytes.value / (1024 * 1024 * 1024)).toFixed(1)
+    : '—'
+))
 
 onMounted(() => {
   loadPreferences()
+  void loadTranscodeSettings()
 })
 </script>
 
 <template>
+  <UAlert
+    v-if="lowMemory"
+    color="warning"
+    variant="subtle"
+    icon="i-lucide-triangle-alert"
+    :title="t('preferences.lowMemoryTranscodeTitle')"
+    :description="t('preferences.lowMemoryTranscodeHint', { memory: memoryGb })"
+    class="my-4"
+  />
   <SettingsToggleRow
     v-model="transcodeToHls"
     :title="t('preferences.transcodeToHls')"