fix: use explicit type imports (#830)

src/runtime/composables/usePopper.ts

@@ -1,13 +1,15 @@
 import { ref, onMounted, watchEffect } from 'vue'
 import type { Ref } from 'vue'
-import { popperGenerator, defaultModifiers, VirtualElement } from '@popperjs/core/lib/popper-lite'
+import { popperGenerator, defaultModifiers } from '@popperjs/core/lib/popper-lite'
+import type { VirtualElement } from '@popperjs/core/lib/popper-lite'
 import type { Instance } from '@popperjs/core'
 import flip from '@popperjs/core/lib/modifiers/flip'
 import offset from '@popperjs/core/lib/modifiers/offset'
 import preventOverflow from '@popperjs/core/lib/modifiers/preventOverflow'
 import computeStyles from '@popperjs/core/lib/modifiers/computeStyles'
 import eventListeners from '@popperjs/core/lib/modifiers/eventListeners'
-import { MaybeElement, unrefElement } from '@vueuse/core'
+import { unrefElement } from '@vueuse/core'
+import type { MaybeElement } from '@vueuse/core'
 import type { PopperOptions } from '../types/popper'
 
 export const createPopper = popperGenerator({

src/runtime/composables/useUI.ts

@@ -2,7 +2,7 @@ import { computed, toValue, useAttrs } from 'vue'
 import type { Ref } from 'vue'
 import { useAppConfig } from '#imports'
 import { mergeConfig, omit, get } from '../utils'
-import { Strategy } from '../types'
+import type { Strategy } from '../types'
 
 export const useUI = <T>(key, $ui: Ref<Partial<T & { strategy: Strategy }> | undefined>, $config?: Ref<T> | T, $wrapperClass?: Ref<string>, withAppConfig: boolean = false) => {
   const $attrs = useAttrs()