fix(filelib-web): 文件库树加载失败时显示错误而非永久加载中

hub/filelib-web/src/lib/LibraryView.svelte

@@ -79,10 +79,10 @@
     </div>
 
     <div class="flex-1 overflow-y-auto px-2 py-2 text-[13px]">
-      {#if roots === null}
-        <div class="px-3 py-6 text-center text-xs text-ink-3">加载中…</div>
-      {:else if treeError}
+      {#if treeError}
         <div class="px-3 py-6 text-center text-xs text-danger">{treeError}</div>
+      {:else if roots === null}
+        <div class="px-3 py-6 text-center text-xs text-ink-3">加载中…</div>
       {:else if roots.length === 0}
         <div class="px-3 py-6 text-center text-xs text-ink-3">
           {$me?.isWebsiteAdmin ? "空文件库 · 点上方「+ 根目录」开始" : "文件库为空,请联系管理员创建根目录"}