start of vertical view

website/src/lib/components/file-list/FileList2.svelte

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+<script lang="ts">
+	import { ScrollArea } from '$lib/components/ui/scroll-area/index';
+	import FileListItem from '$lib/components/file-list/FileListItem.svelte';
+
+	import { fileObservers } from '$lib/db';
+</script>
+
+<ScrollArea class="w-fit p-1 pr-4">
+	<div class="w-60">
+		{#each Array.from($fileObservers.values()) as file}
+			<FileListItem {file} />
+		{/each}
+	</div>
+</ScrollArea>

website/src/lib/components/file-list/FileListItem.svelte

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+<script lang="ts">
+	import CollapsibleTree from '$lib/components/collapsible-tree/CollapsibleTree.svelte';
+	import FileListNode from '$lib/components/file-list/FileListNode.svelte';
+
+	import type { GPXFileWithStatistics } from '$lib/db';
+	import type { Readable } from 'svelte/store';
+
+	export let file: Readable<GPXFileWithStatistics | undefined>;
+</script>
+
+{#if $file}
+	<CollapsibleTree side="left">
+		<FileListNode node={$file.file} id={$file.file._data.id} />
+	</CollapsibleTree>
+{/if}

website/src/lib/components/file-list/FileListNode.svelte

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+<script lang="ts">
+	import { GPXFile, Track, TrackSegment, type AnyGPXTreeElement, type GPXTreeElement } from 'gpx';
+	import CollapsibleTreeNode from '$lib/components/collapsible-tree/CollapsibleTreeNode.svelte';
+
+	export let node: GPXTreeElement<AnyGPXTreeElement>;
+	export let id: string;
+	export let index: number = 0;
+</script>
+
+{#if node instanceof GPXFile}
+	<CollapsibleTreeNode {id}>
+		<span slot="trigger">{node.metadata.name}</span>
+		<div slot="content" class="flex flex-col gap-0.5">
+			{#each node.children as child, i}
+				<svelte:self node={child} id={`${id}-track-${i}`} index={i} />
+			{/each}
+			<CollapsibleTreeNode id={`${id}-wpt`}>
+				<span slot="trigger">Waypoints</span>
+				<div slot="content" class="flex flex-col gap-0.5">
+					{#each node.wpt as wpt, i}
+						<span class="ml-1 truncate">{wpt.name ?? `Waypoint ${i + 1}`}</span>
+					{/each}
+				</div>
+			</CollapsibleTreeNode>
+		</div>
+	</CollapsibleTreeNode>
+{:else if node instanceof Track}
+	<CollapsibleTreeNode {id}>
+		<span slot="trigger" class="truncate">{node.name ?? `Track ${index + 1}`}</span>
+		<div slot="content" class="flex flex-col gap-0.5">
+			{#each node.children as child, i}
+				<svelte:self node={child} id={`${id}-segment-${i}`} index={i} />
+			{/each}
+		</div>
+	</CollapsibleTreeNode>
+{:else if node instanceof TrackSegment}
+	<span class="ml-1">
+		{`Segment ${index + 1}`}
+	</span>
+{/if}