feat: tag/folder tree keyboard accessibility

web/src/lib/components/layouts/user-page-layout.svelte

@@ -1,7 +1,3 @@
-<script lang="ts" module>
-  export const headerId = 'user-page-header';
-</script>
-
 <script lang="ts">
   import { useActions, type ActionArray } from '$lib/actions/use-actions';
   import NavigationBar from '$lib/components/shared-components/navigation-bar/navigation-bar.svelte';
@@ -68,7 +64,7 @@
       <div class="absolute flex h-16 w-full place-items-center justify-between border-b p-2 text-dark">
         <div class="flex gap-2 items-center">
           {#if title}
-            <div class="font-medium outline-none pe-8" tabindex="-1" id={headerId}>{title}</div>
+            <div class="font-medium outline-none pe-8" tabindex="-1">{title}</div>
           {/if}
           {#if description}
             <p class="text-sm text-gray-400 dark:text-gray-600">{description}</p>

web/src/lib/components/shared-components/tree/tree-items.svelte

@@ -7,15 +7,14 @@
     active: string;
     icons: { default: string; active: string };
     getLink: (path: string) => string;
+    isNested?: boolean;
   }
 
-  let { tree, active, icons, getLink }: Props = $props();
+  let { tree, active, icons, getLink, isNested = false }: Props = $props();
 </script>
 
-<ul class="list-none ms-2">
+<ul role={isNested ? 'group' : 'tree'} class="list-none ms-2">
   {#each tree.children as node (node.color ? node.path + node.color : node.path)}
-    <li>
-      <Tree {node} {icons} {active} {getLink} />
-    </li>
+    <Tree {node} {icons} {active} {getLink} />
   {/each}
 </ul>

web/src/lib/components/shared-components/tree/tree.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+  import { goto } from '$app/navigation';
   import TreeItems from '$lib/components/shared-components/tree/tree-items.svelte';
   import { TreeNode } from '$lib/utils/tree-utils';
   import { Icon } from '@immich/ui';
@@ -21,30 +22,108 @@
     event.preventDefault();
     isOpen = !isOpen;
   };
+
+  const handleSelect = (event: MouseEvent | KeyboardEvent, path: string) => {
+    event.preventDefault();
+    event.stopPropagation();
+    navigateTo(path);
+  };
+
+  const handleKeydown = (event: KeyboardEvent, node: TreeNode) => {
+    switch (event.key) {
+      case 'Enter':
+      case ' ': {
+        handleSelect(event, node.path);
+
+        break;
+      }
+      case 'ArrowRight': {
+        event.preventDefault();
+        event.stopPropagation();
+        const hasChildren = node.children.length > 0;
+        if (isOpen && hasChildren) {
+          const target = event.target as HTMLElement;
+          const child = target.querySelector<HTMLLIElement>('ul[role="group"] > li[role="treeitem"]');
+          child?.focus();
+        } else if (!isOpen && hasChildren) {
+          isOpen = true;
+        }
+
+        break;
+      }
+      case 'ArrowLeft': {
+        event.preventDefault();
+        event.stopPropagation();
+        const hasChildren = node.children.length > 0;
+        if (isOpen && hasChildren) {
+          isOpen = false;
+        } else if (node.parents.length > 0) {
+          const target = event.target as HTMLElement;
+          const parent = target.parentElement?.closest<HTMLLIElement>('li[role="treeitem"]');
+          parent?.focus();
+        }
+
+        break;
+      }
+      case 'ArrowUp': {
+        event.preventDefault();
+        event.stopPropagation();
+        console.log('focus previous node');
+
+        break;
+      }
+      case 'ArrowDown': {
+        event.preventDefault();
+        event.stopPropagation();
+        console.log('focus next node');
+
+        break;
+      }
+    }
+  };
+
+  const navigateTo = (path: string) => {
+    const link = getLink(path);
+    void goto(link, { keepFocus: true });
+  };
 </script>
 
-<a
-  href={getLink(node.path)}
-  title={node.value}
-  class={`flex grow place-items-center ps-2 py-1 text-sm rounded-lg hover:bg-slate-200 dark:hover:bg-slate-800 hover:font-semibold ${isTarget ? 'bg-slate-100 dark:bg-slate-700 font-semibold text-primary' : 'dark:text-gray-200'}`}
-  data-sveltekit-keepfocus
+<!-- href={getLink(node.path)} -->
+<li
+  role="treeitem"
+  aria-selected={false}
+  tabindex="0"
+  class="outline-none"
+  onkeydown={(event) => handleKeydown(event, node)}
+  onclick={(event) => handleSelect(event, node.path)}
 >
-  {#if node.size > 0}
-    <button type="button" {onclick}>
-      <Icon icon={isOpen ? mdiChevronDown : mdiChevronRight} class="text-gray-400" size="20" />
-    </button>
-  {/if}
-  <div class={node.size === 0 ? 'ml-[1.5em] ' : ''}>
-    <Icon
-      icon={isActive ? icons.active : icons.default}
-      class={isActive ? 'text-primary' : 'text-gray-400'}
-      color={node.color}
-      size="20"
-    />
+  <div
+    class={`flex grow place-items-center ps-2 py-1 text-sm rounded-lg cursor-pointer hover:bg-slate-200 dark:hover:bg-slate-800 hover:font-semibold ${isTarget ? 'bg-slate-100 dark:bg-slate-700 font-semibold text-primary' : 'dark:text-gray-200'}`}
+  >
+    {#if node.size > 0}
+      <button tabindex={-1} aria-hidden="true" type="button" {onclick}>
+        <Icon icon={isOpen ? mdiChevronDown : mdiChevronRight} class="text-gray-400" size="20" />
+      </button>
+    {/if}
+    <div class={node.size === 0 ? 'ml-[1.5em] ' : ''}>
+      <Icon
+        icon={isActive ? icons.active : icons.default}
+        class={isActive ? 'text-primary' : 'text-gray-400'}
+        color={node.color}
+        size="20"
+      />
+    </div>
+    <span class="text-nowrap overflow-hidden text-ellipsis font-mono ps-1 pt-1 whitespace-pre-wrap">{node.value}</span>
   </div>
-  <span class="text-nowrap overflow-hidden text-ellipsis font-mono ps-1 pt-1 whitespace-pre-wrap">{node.value}</span>
-</a>
 
-{#if isOpen}
-  <TreeItems tree={node} {icons} {active} {getLink} />
-{/if}
+  {#if isOpen}
+    <TreeItems tree={node} {icons} {active} {getLink} isNested />
+  {/if}
+</li>
+
+<style>
+  li[role='treeitem']:focus-visible > div {
+    outline-style: var(--tw-outline-style);
+    outline-width: 2px;
+  }
+</style>

web/src/routes/(user)/folders/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
   import { afterNavigate, goto, invalidateAll } from '$app/navigation';
-  import UserPageLayout, { headerId } from '$lib/components/layouts/user-page-layout.svelte';
+  import UserPageLayout from '$lib/components/layouts/user-page-layout.svelte';
   import ButtonContextMenu from '$lib/components/shared-components/context-menu/button-context-menu.svelte';
   import GalleryViewer from '$lib/components/shared-components/gallery-viewer/gallery-viewer.svelte';
   import Breadcrumbs from '$lib/components/shared-components/tree/breadcrumbs.svelte';
@@ -20,7 +20,6 @@
   import TagAction from '$lib/components/timeline/actions/TagAction.svelte';
   import AssetSelectControlBar from '$lib/components/timeline/AssetSelectControlBar.svelte';
   import { AppRoute, QueryParameter } from '$lib/constants';
-  import SkipLink from '$lib/elements/SkipLink.svelte';
   import type { Viewport } from '$lib/managers/timeline-manager/types';
   import { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
   import { foldersStore } from '$lib/stores/folders.svelte';
@@ -79,7 +78,6 @@
 <UserPageLayout title={data.meta.title}>
   {#snippet sidebar()}
     <Sidebar>
-      <SkipLink target={`#${headerId}`} text={$t('skip_to_folders')} breakpoint="md" />
       <section>
         <div class="uppercase text-xs ps-4 mb-2 dark:text-white">{$t('explorer')}</div>
         <div class="h-full">

web/src/routes/(user)/tags/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -1,13 +1,12 @@
 <script lang="ts">
   import { goto } from '$app/navigation';
-  import UserPageLayout, { headerId } from '$lib/components/layouts/user-page-layout.svelte';
+  import UserPageLayout from '$lib/components/layouts/user-page-layout.svelte';
   import Breadcrumbs from '$lib/components/shared-components/tree/breadcrumbs.svelte';
   import TreeItemThumbnails from '$lib/components/shared-components/tree/tree-item-thumbnails.svelte';
   import TreeItems from '$lib/components/shared-components/tree/tree-items.svelte';
   import Sidebar from '$lib/components/sidebar/sidebar.svelte';
   import Timeline from '$lib/components/timeline/Timeline.svelte';
   import { AppRoute, AssetAction, QueryParameter } from '$lib/constants';
-  import SkipLink from '$lib/elements/SkipLink.svelte';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import TagCreateModal from '$lib/modals/TagCreateModal.svelte';
   import TagEditModal from '$lib/modals/TagEditModal.svelte';
@@ -84,7 +83,6 @@
 <UserPageLayout title={data.meta.title}>
   {#snippet sidebar()}
     <Sidebar>
-      <SkipLink target={`#${headerId}`} text={$t('skip_to_tags')} breakpoint="md" />
       <section>
         <div class="uppercase text-xs ps-4 mb-2 dark:text-white">{$t('explorer')}</div>
         <div class="h-full">