style(web): 统一后台图标与全局视觉

src/views/contentManagement/EpisodeManagementView.vue

@@ -4,7 +4,7 @@
 import { computed, onMounted, reactive, ref } from 'vue'
 import { useRoute } from 'vue-router'
 import { ElMessage, ElMessageBox } from 'element-plus'
-import { Plus } from '@element-plus/icons-vue'
+import { AppIcons } from '@/constants/icons'
 import { pageDramasApi } from '@/api/admin/drama'
 import {
   createEpisodeApi,
@@ -232,7 +232,7 @@ onMounted(async () => {
       class="primary-button"
       :disabled="!selectedDramaId"
       @click="openCreate"
-      ><el-icon><Plus /></el-icon>新增剧集</el-button
+      ><AppIcon :icon="AppIcons.add" />新增剧集</el-button
     ></div
   >
   <section class="panel episode-panel">