Convert multiple pages into SPA

svelte/src/filesystem/viewers/FilePreview.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
 import { onMount, tick } from "svelte";
 import Spinner from "util/Spinner.svelte";
-import { fs_node_type } from "filesystem/FilesystemAPI";
+import { fs_node_type } from "lib/FilesystemAPI";
 import FileManager from "filesystem/filemanager/FileManager.svelte";
 import Audio from "./Audio.svelte";
 import File from "./File.svelte";
@@ -74,7 +74,7 @@ export const seek = (delta: number) => {
 
 {#if viewer_type === ""}
 	<div class="center">
-		<Spinner></Spinner>
+		<Spinner/>
 	</div>
 {:else if viewer_type === "dir"}
 	<FileManager nav={nav} upload_widget={upload_widget} edit_window={edit_window}>