opt: upgrade element-plus to 2.3.0, optimize the styles for for element dialog

web/src/components/ChatMidJourney.vue

@@ -12,7 +12,7 @@
             <el-image :src="data.image?.url"
                       :zoom-rate="1.0"
                       :preview-src-list="[data.image?.url]"
-                      :initial-index="0" lazy>
+                      :initial-index="0" loading="lazy">
               <template #placeholder>
                 <div class="image-slot"
                      :style="{height: height+'px', lineHeight:height+'px'}">

web/src/components/admin/AdminHeader.vue

@@ -62,7 +62,7 @@
     <el-dialog
         v-model="showDialog"
         :show-close="true"
-        custom-class="donate-dialog"
+        class="donate-dialog"
         width="400px"
         title="请作者喝杯咖啡"
     >

web/src/components/admin/AdminSidebar.vue

@@ -158,7 +158,7 @@ setMenuItems(items)
     .el-image {
       width 30px;
       height 30px;
-      padding-top 5px;
+      padding-top 8px;
       border-radius 100%
 
       .el-image__inner {