Optimize comment notification template to support rich text rendering (#7683)

#### What type of PR is this?

/area core
/area ui
/milestone 2.21.x
/kind feature

#### What this PR does / why we need it:

Optimize comment notification template to support rich text rendering

#### Does this PR introduce a user-facing change?

```release-note
None
```

application/src/main/resources/extensions/notification-templates.yaml

@@ -25,7 +25,7 @@ spec:
             <a th:href="${postUrl}" target="_blank" th:text="|《${postTitle}》|"></a>
             <span>，以下是评论的具体内容：</span>
           </p>
-          <pre class="content" th:text="${content}"></pre>
+          <div class="content" th:utext="${content}"></div>
         </div>
         <div></div>
       </div>
@@ -58,7 +58,7 @@ spec:
             <a th:href="${pageUrl}" target="_blank" th:text="|《${pageTitle}》|"></a>
             <span>，以下是评论的具体内容：</span>
           </p>
-          <pre class="content" th:text="${content}"></pre>
+          <div class="content" th:utext="${content}"></div>
         </div>
         <div></div>
       </div>
@@ -87,15 +87,18 @@ spec:
         </div>
         <div class="body">
           <p>
-            <span th:text="${replier}"></span> 在评论
+            <span th:text="${replier}"></span> 在
             <a
               th:href="${commentSubjectUrl}"
               target="_blank"
-              th:text="|”${isQuoteReply ? quoteContent : commentContent}”|"
+              th:text="|《${commentSubjectTitle}》|"
             ></a>
-            <span>中回复了你，以下是回复的具体内容：</span>
+            <span>中回复了你。</span>
           </p>
-          <pre class="content" th:text="${content}"></pre>
+          <p>你的评论：</p>
+          <div class="content" th:utext="${isQuoteReply ? quoteContent : commentContent}"></div>
+          <p>回复的内容：</p>
+          <div class="content" th:utext="${content}"></div>
         </div>
         <div></div>
       </div>

ui/console-src/modules/dashboard/widgets/presets/users/NotificationWidget.vue

@@ -14,6 +14,7 @@ import {
 } from "@halo-dev/components";
 import { useQuery } from "@tanstack/vue-query";
 import { OverlayScrollbarsComponent } from "overlayscrollbars-vue";
+import sanitize from "sanitize-html";
 
 const { currentUser } = useUserStore();
 
@@ -81,7 +82,12 @@ function handleRouteToNotification(notification: Notification) {
           <template #start>
             <VEntityField
               :title="notification.spec?.title"
-              :description="notification.spec?.rawContent"
+              :description="
+                sanitize(notification.spec?.htmlContent || '', {
+                  allowedTags: [],
+                  allowedAttributes: {},
+                })
+              "
               @click="handleRouteToNotification(notification)"
             />
           </template>

ui/uc-src/modules/notifications/Notifications.vue

@@ -231,7 +231,9 @@ function handleMarkAllAsRead() {
             </Transition>
           </OverlayScrollbarsComponent>
         </div>
-        <div class="col-span-12 sm:col-span-6 lg:col-span-7 xl:col-span-9">
+        <div
+          class="col-span-12 overflow-auto sm:col-span-6 lg:col-span-7 xl:col-span-9"
+        >
           <NotificationContent :notification="selectedNotification" />
         </div>
       </div>

ui/uc-src/modules/notifications/components/NotificationContent.vue

@@ -1,6 +1,7 @@
 <script lang="ts" setup>
 import type { Notification } from "@halo-dev/api-client";
 import { OverlayScrollbarsComponent } from "overlayscrollbars-vue";
+import sanitize from "sanitize-html";
 import { computed } from "vue";
 
 const props = withDefaults(
@@ -10,34 +11,28 @@ const props = withDefaults(
   { notification: undefined }
 );
 
-const htmlContent = computed(() => {
-  const styles = `
-  <style>
-    html {
-        font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
-        font-size: 0.875rem;
-        line-height: 1.25rem;
-    }
-  </style>
-  `;
-
-  if (!props.notification?.spec?.htmlContent) {
-    return "";
-  }
-
-  return styles + props.notification?.spec?.htmlContent;
+const content = computed(() => {
+  return sanitize(props.notification?.spec?.htmlContent || "");
 });
 </script>
 
 <template>
-  <div class="h-full w-full overflow-auto">
-    <OverlayScrollbarsComponent
-      element="div"
-      :options="{ scrollbars: { autoHide: 'scroll' } }"
-      class="h-full w-full"
-      defer
-    >
-      <iframe class="h-full w-full p-2" :srcdoc="htmlContent"></iframe>
-    </OverlayScrollbarsComponent>
-  </div>
+  <OverlayScrollbarsComponent
+    element="div"
+    :options="{ scrollbars: { autoHide: 'scroll' } }"
+    class="h-full w-full"
+    defer
+  >
+    <div class="markdown-body h-full w-full p-2 text-sm" v-html="content"></div>
+  </OverlayScrollbarsComponent>
 </template>
+
+<style scoped lang="scss">
+.markdown-body :deep(ul) {
+  list-style: disc !important;
+}
+
+.markdown-body :deep(ol) {
+  list-style: decimal !important;
+}
+</style>

ui/uc-src/modules/notifications/components/NotificationListItem.vue

@@ -5,7 +5,8 @@ import type { Notification } from "@halo-dev/api-client";
 import { ucApiClient } from "@halo-dev/api-client";
 import { Dialog, Toast, VStatusDot } from "@halo-dev/components";
 import { useMutation, useQueryClient } from "@tanstack/vue-query";
-import { ref, watch } from "vue";
+import sanitize from "sanitize-html";
+import { computed, ref, watch } from "vue";
 import { useI18n } from "vue-i18n";
 
 const queryClient = useQueryClient();
@@ -74,6 +75,14 @@ watch(
     immediate: true,
   }
 );
+
+const content = computed(() => {
+  // Clean html tags
+  return sanitize(props.notification.spec?.htmlContent || "", {
+    allowedTags: [],
+    allowedAttributes: {},
+  });
+});
 </script>
 <template>
   <div
@@ -99,10 +108,10 @@ watch(
       />
     </div>
     <div
-      v-if="notification.spec?.rawContent"
-      class="truncate text-xs text-gray-600"
+      v-if="notification.spec?.htmlContent"
+      class="line-clamp-1 text-xs text-gray-600"
     >
-      {{ notification.spec.rawContent }}
+      {{ content }}
     </div>
     <div class="flex h-6 items-end justify-between">
       <div class="text-xs text-gray-600">