[backport cloud/1.32] feat: LOD setting for LG and Vue (#6849)

Backport of #6755 to `cloud/1.32`

Automatically created by backport workflow.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6849-backport-cloud-1-32-feat-LOD-setting-for-LG-and-Vue-2b46d73d36508186b306ef89d87bef29)
by [Unito](https://www.unito.io)

Co-authored-by: Simula_r <18093452+simula-r@users.noreply.github.com>

src/composables/settings/useRenderModeSetting.ts

@@ -0,0 +1,42 @@
+import type { ComputedRef } from 'vue'
+import { ref, watch } from 'vue'
+
+import { useSettingStore } from '@/platform/settings/settingStore'
+import type { Settings } from '@/schemas/apiSchema'
+
+interface RenderModeSettingConfig<TSettingKey extends keyof Settings> {
+  setting: TSettingKey
+  vue: Settings[TSettingKey]
+  litegraph: Settings[TSettingKey]
+}
+
+export function useRenderModeSetting<TSettingKey extends keyof Settings>(
+  config: RenderModeSettingConfig<TSettingKey>,
+  isVueMode: ComputedRef<boolean>
+) {
+  const settingStore = useSettingStore()
+  const vueValue = ref(config.vue)
+  const litegraphValue = ref(config.litegraph)
+  const lastWasVue = ref<boolean | null>(null)
+
+  const load = async (vue: boolean) => {
+    if (lastWasVue.value === vue) return
+
+    if (lastWasVue.value !== null) {
+      const currentValue = settingStore.get(config.setting)
+      if (lastWasVue.value) {
+        vueValue.value = currentValue
+      } else {
+        litegraphValue.value = currentValue
+      }
+    }
+
+    await settingStore.set(
+      config.setting,
+      vue ? vueValue.value : litegraphValue.value
+    )
+    lastWasVue.value = vue
+  }
+
+  watch(isVueMode, load, { immediate: true })
+}