fix: 删除素材弹窗标题

src/views/material/audio/index.vue

@@ -226,6 +226,7 @@ export default {
     },
     del(item) {
       this.$confirm({
+        title: '删除素材',
         content: "确定要删除素材吗？",
         ok: () => {
           delMaterial(item.id, () => {

src/views/material/image/index.vue

@@ -224,6 +224,7 @@ export default {
     },
     del(item) {
       this.$confirm({
+        title: '删除素材',
         content: "确定要删除素材吗？",
         ok: () => {
           delMaterial(item.id, () => {

src/views/material/pano/index.vue

@@ -356,6 +356,7 @@ export default {
     },
     del(item) {
       this.$confirm({
+        title: '删除素材',
         content: "确定要删除素材吗？",
         ok: () => {
           delMaterial(item.id, () => {