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/components/dialog/UserAddEditDialog.vue

@@ -291,7 +291,7 @@ onMounted(() => {
       :title="`${props.oper === 'add' ? '新增' : '编辑'}用户${props.oper !== 'add' ? ` - ${userName}` : ''}`"
       class="rounded-t"
     >
-      <DialogCloseBtn @click="emit('close')" />
+      <VDialogCloseBtn @click="emit('close')" />
       <VDivider />
       <VCardItem>
         <!-- 👉 Avatar -->