refactor: 迁移到 @nuxt/ui@4

- https://ui.nuxt.com/docs/getting-started/migration/v4#changes-from-v3

app/pages/generation/admin/materials.vue

@@ -885,7 +885,7 @@ const onCreateSubmit = async (
       <!-- 状态筛选 -->
       <div class="mb-4 flex items-center gap-4">
         <span class="text-sm text-gray-600 dark:text-gray-400">状态筛选：</span>
-        <UButtonGroup>
+        <UFieldGroup>
           <UButton
             :color="statusFilter === 0 ? 'primary' : 'neutral'"
             :variant="statusFilter === 0 ? 'solid' : 'ghost'"
@@ -910,7 +910,7 @@ const onCreateSubmit = async (
               }
             "
           />
-        </UButtonGroup>
+        </UFieldGroup>
         <UBadge
           v-if="titlesListResp?.data.total"
           color="primary"

app/pages/generation/avatar-models.vue

@@ -338,7 +338,7 @@ const onAvatarUpload = async (files: FileList) => {
           <div
             class="absolute inset-0 flex flex-col items-center justify-center bg-white/50 opacity-0 backdrop-blur-sm transition-opacity group-hover:opacity-100 dark:bg-neutral-800/50"
           >
-            <UButtonGroup>
+            <UFieldGroup>
               <UButton
                 color="neutral"
                 icon="tabler:download"
@@ -353,7 +353,7 @@ const onAvatarUpload = async (files: FileList) => {
                   }
                 "
               />
-            </UButtonGroup>
+            </UFieldGroup>
             <span
               class="pt-4 text-xs font-medium text-neutral-400 dark:text-neutral-300"
             >

app/pages/generation/green-screen.vue

@@ -131,7 +131,7 @@ onMounted(() => {
         "
       >
         <template #action>
-          <UButtonGroup size="md">
+          <UFieldGroup size="md">
             <UInput
               id="input-search"
               v-model="searchInput"
@@ -151,7 +151,7 @@ onMounted(() => {
                 />
               </template>
             </UInput>
-          </UButtonGroup>
+          </UFieldGroup>
           <UButton
             id="button-create"
             :trailing="false"

app/pages/generation/ppt-templates.vue

@@ -476,7 +476,7 @@ const onDeleteCat = (cat: PPTCategory) => {
 
           <div class="space-y-4">
             <UFormField label="创建分类">
-              <UButtonGroup
+              <UFieldGroup
                 orientation="horizontal"
                 class="w-full"
                 size="lg"
@@ -493,7 +493,7 @@ const onDeleteCat = (cat: PPTCategory) => {
                   :disabled="!createCatInput"
                   @click="onCreateCat"
                 />
-              </UButtonGroup>
+              </UFieldGroup>
             </UFormField>
             <div class="rounded-md border dark:border-neutral-700">
               <UTable

app/pages/user/authenticate.vue

@@ -440,7 +440,7 @@ onMounted(() => {
                 name="mobile"
                 required
               >
-                <UButtonGroup class="w-full">
+                <UFieldGroup class="w-full">
                   <UInput
                     v-model="smsForm.mobile"
                     :disabled="final_loading"
@@ -467,7 +467,7 @@ onMounted(() => {
                     color="neutral"
                     variant="outline"
                   />
-                </UButtonGroup>
+                </UFieldGroup>
               </UFormField>
               <Transition name="pin-root">
                 <div
@@ -518,7 +518,7 @@ onMounted(() => {
                   name="mobile"
                   required
                 >
-                  <UButtonGroup class="w-full">
+                  <UFieldGroup class="w-full">
                     <UInput
                       v-model="forgetPasswordState.mobile"
                       :disabled="final_loading"
@@ -543,7 +543,7 @@ onMounted(() => {
                       class="text-xs font-bold"
                       color="neutral"
                     />
-                  </UButtonGroup>
+                  </UFieldGroup>
                 </UFormField>
                 <UFormField
                   label="验证码"