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/filebrowser/FileList.vue

@@ -688,7 +688,7 @@ onMounted(() => {
   <!-- 重命名弹窗 -->
   <VDialog v-if="renamePopper" v-model="renamePopper" max-width="35rem">
     <VCard title="重命名">
-      <DialogCloseBtn @click="renamePopper = false" />
+      <VDialogCloseBtn @click="renamePopper = false" />
       <VDivider />
       <VCardText>
         <VRow>

src/components/filebrowser/FileToolbar.vue

@@ -168,7 +168,7 @@ const sortIcon = computed(() => {
         </IconBtn>
       </template>
       <VCard title="新建文件夹">
-        <DialogCloseBtn @click="newFolderPopper = false" />
+        <VDialogCloseBtn @click="newFolderPopper = false" />
         <VDivider />
         <VCardText>
           <VTextField v-model="newFolderName" label="名称" />