Refactor page titles and dialog close buttons across multiple views

- Replaced instances of `DialogCloseBtn` with `VDialogCloseBtn` in TransferHistoryView, AccountSettingAbout, AccountSettingSystem, and UserProfileView for consistency.
- Introduced a new component `PageContentTitle` to standardize page titles in SiteCardListView, SubscribeListView, UserListView, and WorkflowListView, improving layout and readability.
- Added keyword filtering functionality in SubscribeListView and SubscribeShareView to enhance user experience during searches.
- Added a new site logo image to the assets.

src/views/site/SiteCardListView.vue

@@ -89,16 +89,7 @@ onActivated(() => {
 <template>
   <div class="card-list-container">
     <!-- 页面标题 -->
-    <div class="my-3 md:flex md:items-center md:justify-between">
-      <div class="min-w-0 flex-1 mx-0 flex align-middle">
-        <h2
-          class="mb-3 ms-2 truncate text-2xl font-bold leading-7 text-gray-100 sm:overflow-visible sm:text-3xl sm:leading-9 md:mb-0"
-          data-testid="page-header"
-        >
-          <span class="text-moviepilot">站点管理</span>
-        </h2>
-      </div>
-    </div>
+    <VPageContentTitle title="站点管理" />
     <LoadingBanner v-if="!isRefreshed" class="mt-12" />
     <draggable
       v-if="siteList.length > 0"