fix: remove unnecessary persistent attribute from ReadmeDialog and adjust dialog structure in ExtensionPage

dashboard/src/components/shared/ReadmeDialog.vue

@@ -115,7 +115,7 @@ const _show = computed({
 </script>
 
 <template>
-  <v-dialog v-model="_show" width="800" persistent>
+  <v-dialog v-model="_show" width="800">
     <v-card>
       <v-card-title class="d-flex justify-space-between align-center">
         <span class="text-h5">{{ t('core.common.readme.title') }}</span>

dashboard/src/views/ExtensionPage.vue

@@ -1568,7 +1568,7 @@ watch(marketSearch, (newVal) => {
 
   <!-- 上传插件对话框 -->
   <v-dialog v-model="dialog" width="500">
-    <div class="v-card v-theme--PurpleThemeDark v-card--density-default rounded-lg v-card--variant-elevated">
+    <div class="v-card v-card--density-default rounded-lg v-card--variant-elevated">
       <div class="v-card__loader">
         <v-progress-linear :indeterminate="loading_" color="primary" height="2" :active="loading_"></v-progress-linear>
       </div>