svelte-kit-vice/web/routes/uix/components/tree-grid/+page.svelte

<script lang="ts">
	import {
		TreeGrid,
		type TreeGridSize,
		type TreeGridVariant,
		type TreeGridColor,
		type TreeGridSelectionMode
	} from '$uix/eidos/components/tree-grid';
	import { compileMorfo } from '$uix/morfo';
	import { treeGridMorfo } from '@/uix/morfo/components/tree-grid';
	import { getActiveUix } from '$active-uix';

	const uix = getActiveUix();

	type Tab = 'live' | 'api' | 'morfo' | 'sema' | 'recipe' | 'a11y';
	let tab = $state<Tab>('live');

	// ── Sample data: file manager with columns ──────────────────────────
	type Leaf = {
		kind: 'item';
		value: string;
		label: string;
		size: string;
		modified: string;
	};
	type Folder = {
		kind: 'branch';
		value: string;
		label: string;
		size: string;
		modified: string;
		children: TreeNode[];
	};
	type TreeNode = Leaf | Folder;

	const FILES: TreeNode[] = [
		{ kind: 'item', value: 'readme', label: 'README.md', size: '4.2 KB', modified: '2026-05-22' },
		{
			kind: 'branch',
			value: 'src',
			label: 'src',
			size: '—',
			modified: '2026-05-23',
			children: [
				{ kind: 'item', value: 'index', label: 'index.ts', size: '1.1 KB', modified: '2026-05-23' },
				{ kind: 'item', value: 'app', label: 'App.svelte', size: '7.8 KB', modified: '2026-05-22' },
				{
					kind: 'branch',
					value: 'components',
					label: 'components',
					size: '—',
					modified: '2026-05-23',
					children: [
						{ kind: 'item', value: 'button', label: 'Button.svelte', size: '3.2 KB', modified: '2026-05-21' },
						{ kind: 'item', value: 'input', label: 'Input.svelte', size: '2.1 KB', modified: '2026-05-22' },
						{
							kind: 'branch',
							value: 'forms',
							label: 'forms',
							size: '—',
							modified: '2026-05-23',
							children: [
								{ kind: 'item', value: 'field', label: 'Field.svelte', size: '1.7 KB', modified: '2026-05-23' },
								{ kind: 'item', value: 'form', label: 'Form.svelte', size: '4.4 KB', modified: '2026-05-22' }
							]
						}
					]
				}
			]
		},
		{
			kind: 'branch',
			value: 'tests',
			label: 'tests',
			size: '—',
			modified: '2026-05-21',
			children: [
				{ kind: 'item', value: 'unit', label: 'unit.spec.ts', size: '5.4 KB', modified: '2026-05-21' },
				{ kind: 'item', value: 'e2e', label: 'e2e.spec.ts', size: '9.1 KB', modified: '2026-05-21' }
			]
		},
		{ kind: 'item', value: 'package', label: 'package.json', size: '2.0 KB', modified: '2026-05-20' }
	];

	// ── Visual props ─────────────────────────────────────────────────────
	let size = $state<TreeGridSize>('md');
	let variant = $state<TreeGridVariant>('surface');
	let color = $state<TreeGridColor>('primary');
	let block = $state(true);
	let striped = $state(true);
	let hoverable = $state(true);
	let showIndentGuides = $state(true);
	let useScrollRegion = $state(false);
	let columns = $state('1fr 7rem 9rem');

	// ── i18n controls ────────────────────────────────────────────────────
	let locale = $state('en-US');
	let dir = $state<'ltr' | 'rtl'>('ltr');

	// ── Soma feature controls ────────────────────────────────────────────
	let selectionMode = $state<TreeGridSelectionMode>('single');
	let loop = $state(false);
	let typeahead = $state(true);
	let expanded = $state<string[]>(['src', 'components']);
	let value = $state<string[]>([]);

	// ── Trace ────────────────────────────────────────────────────────────
	type TraceEntry = { event: string; family: string; intent?: string; at: number };
	let trace = $state<TraceEntry[]>([]);
	let stageRef = $state<HTMLElement | null>(null);

	$effect(() => {
		const el = stageRef;
		if (!el) return;
		const obs = new MutationObserver((mutations) => {
			for (const m of mutations) {
				if (m.attributeName !== 'data-event') continue;
				const target = m.target as Element;
				const ev = target.getAttribute('data-event');
				if (!ev) continue;
				trace = [
					{
						event: ev,
						family: target.getAttribute('data-event-family') ?? '—',
						intent: target.getAttribute('data-event-intent') ?? undefined,
						at: Date.now()
					},
					...trace
				].slice(0, 6);
			}
		});
		obs.observe(el, { attributes: true, subtree: true, attributeFilter: ['data-event'] });
		return () => obs.disconnect();
	});

	const compiled = compileMorfo(treeGridMorfo);
	const partsList = $derived([...compiled.parts.byKebab.values()]);
	const events = $derived([...compiled.actions.byName.values()]);

	function fmtTime(at: number): string {
		const d = new Date(at);
		return `${String(d.getSeconds()).padStart(2, '0')}.${String(d.getMilliseconds()).padStart(3, '0')}`;
	}

	function fmtDate(s: string) {
		try {
			return new Intl.DateTimeFormat(locale, { year: 'numeric', month: 'short', day: '2-digit' }).format(new Date(s));
		} catch {
			return s;
		}
	}

	const eidosSnippet = $derived(
		[
			"<script lang='ts'>",
			"  import { TreeGrid } from '$uix/eidos/components/tree-grid';",
			'  let expanded = $state<string[]>([]);',
			'  let value = $state<string[]>([]);',
			'</' + 'script>',
			'',
			'<TreeGrid',
			`  columns="${columns}"`,
			'  bind:expanded',
			'  bind:value',
			selectionMode !== 'single' && `  selectionMode="${selectionMode}"`,
			dir !== 'ltr' && `  dir="${dir}"`,
			loop && '  loop',
			!typeahead && '  typeahead={false}',
			size !== 'md' && `  size="${size}"`,
			variant !== 'surface' && `  variant="${variant}"`,
			color !== 'primary' && `  color="${color}"`,
			!block && '  block={false}',
			striped && '  striped',
			!hoverable && '  hoverable={false}',
			showIndentGuides && '  showIndentGuides',
			useScrollRegion && '  maxHeight="22rem"',
			'>',
			'  <TreeGrid.Header>',
			'    <TreeGrid.ColumnHeader>Name</TreeGrid.ColumnHeader>',
			'    <TreeGrid.ColumnHeader>Size</TreeGrid.ColumnHeader>',
			'    <TreeGrid.ColumnHeader>Modified</TreeGrid.ColumnHeader>',
			'  </TreeGrid.Header>',
			'  <TreeGrid.Row value="src" hasChildren>',
			'    <TreeGrid.Cell>',
			'      <TreeGrid.ExpandTrigger />',
			'      src',
			'    </TreeGrid.Cell>',
			'    <TreeGrid.Cell>—</TreeGrid.Cell>',
			'    <TreeGrid.Cell>2 days ago</TreeGrid.Cell>',
			'    <TreeGrid.RowChildren>',
			'      <TreeGrid.Row value="index">…</TreeGrid.Row>',
			'    </TreeGrid.RowChildren>',
			'  </TreeGrid.Row>',
			'</TreeGrid>'
		]
			.filter(Boolean)
			.join('\n')
	);
</script>

{#snippet renderRow(node: TreeNode)}
	{#if node.kind === 'item'}
		<TreeGrid.Row value={node.value}>
			<TreeGrid.Cell>
				<span style="opacity: 0.6;">📄</span>
				{node.label}
			</TreeGrid.Cell>
			<TreeGrid.Cell>{node.size}</TreeGrid.Cell>
			<TreeGrid.Cell>{fmtDate(node.modified)}</TreeGrid.Cell>
		</TreeGrid.Row>
	{:else}
		<TreeGrid.Row value={node.value} hasChildren>
			<TreeGrid.Cell>
				<TreeGrid.ExpandTrigger />
				<span style="margin-inline-end: 0.25rem;">📁</span>
				{node.label}
			</TreeGrid.Cell>
			<TreeGrid.Cell>{node.size}</TreeGrid.Cell>
			<TreeGrid.Cell>{fmtDate(node.modified)}</TreeGrid.Cell>
			<TreeGrid.RowChildren>
				{#each node.children as child (child.value)}
					{@render renderRow(child)}
				{/each}
			</TreeGrid.RowChildren>
		</TreeGrid.Row>
	{/if}
{/snippet}

<div data-uix-canvas-inner {dir}>
	<header>
		<div data-uix-eyebrow>Data · TreeGrid</div>
		<h1 data-uix-page-title>TreeGrid</h1>
		<p data-uix-page-lede>
			Hierarchical rows + columnar attributes — file managers, org
			charts with departments, nested tasks with priority/due-date
			columns. Implements the WAI-ARIA <code>role="treegrid"</code>
			pattern. Use TreeGrid when data has both a hierarchy and
			columns; use <code>TreeView</code> for hierarchy-only and
			<code>Table</code> for flat tabular data.
		</p>
		<div data-uix-page-meta>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>parts</span>{compiled.parts.order.length}
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>events</span>{events.length}
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>sizes</span>5
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>apg</span>
				<a href={treeGridMorfo.apg} target="_blank" rel="noreferrer">treegrid ↗</a>
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>expanded</span> {expanded.length}
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>selected</span> {value.length ? value.join(', ') : '—'}
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>locale</span> {locale}
			</span>
			<span data-uix-meta-pill>
				<span data-uix-meta-key>dir</span> {dir}
			</span>
		</div>
	</header>

	<div data-uix-stage>
		<div data-uix-stage-area bind:this={stageRef} style="padding: var(--uix-space-3);">
			<TreeGrid
				bind:expanded
				bind:value
				{selectionMode}
				{loop}
				{typeahead}
				{dir}
				{size}
				{variant}
				{color}
				{block}
				{striped}
				{hoverable}
				{showIndentGuides}
				{columns}
				maxHeight={useScrollRegion ? '22rem' : undefined}
			>
				<TreeGrid.Header>
					<TreeGrid.ColumnHeader>Name</TreeGrid.ColumnHeader>
					<TreeGrid.ColumnHeader>Size</TreeGrid.ColumnHeader>
					<TreeGrid.ColumnHeader>Modified</TreeGrid.ColumnHeader>
				</TreeGrid.Header>
				{#each FILES as node (node.value)}
					{@render renderRow(node)}
				{/each}
			</TreeGrid>
		</div>
		<div data-uix-stage-trace>
			<span data-uix-stage-trace-key>trace</span>
			{#if trace.length === 0}
				<span>click a row, expand a branch, arrow keys to navigate…</span>
			{:else}
				{#each trace.slice(0, 3) as entry}
					<span><span data-uix-stage-trace-event>{entry.event}</span> · {entry.family}{entry.intent ? ' · ' + entry.intent : ''}</span>
					<span style="color: var(--uix-text-faint)">{fmtTime(entry.at)}</span>
				{/each}
			{/if}
			<span style="margin-inline-start: auto;">
				<span data-uix-stage-trace-key>expanded</span> [{expanded.join(', ')}]
			</span>
		</div>
	</div>

	<div data-uix-tabs role="tablist">
		<button data-uix-tab data-active={tab === 'live'} onclick={() => (tab = 'live')}>Live</button>
		<button data-uix-tab data-active={tab === 'api'} onclick={() => (tab = 'api')}>
			API <span data-uix-tab-count>7</span>
		</button>
		<button data-uix-tab data-active={tab === 'morfo'} onclick={() => (tab = 'morfo')}>
			<span data-uix-layer-badge="morfo">morfo</span>
			<span data-uix-tab-count>{partsList.length}p · {events.length}e</span>
		</button>
		<button data-uix-tab data-active={tab === 'sema'} onclick={() => (tab = 'sema')}>
			<span data-uix-layer-badge="sema">sema</span>
			<span data-uix-tab-count>{events.length}</span>
		</button>
		<button data-uix-tab data-active={tab === 'recipe'} onclick={() => (tab = 'recipe')}>Recipe</button>
		<button data-uix-tab data-active={tab === 'a11y'} onclick={() => (tab = 'a11y')}>A11y</button>
	</div>

	{#if tab === 'live'}
		<section data-uix-section>
			<h2 data-uix-section-title>Controls</h2>
			<p data-uix-section-desc>
				Soma owns selection / expansion / roving tabindex / typeahead / ARIA treegrid wiring. Eidos adds visual chrome, CSS-Grid layout via the <code>columns</code> prop, optional indent guides, striping, hover and scroll region.
			</p>

			<div data-uix-subsection-head>
				<span data-uix-layer-badge="soma">soma</span> i18n
			</div>
			<div data-uix-controls>
				<label data-uix-control>
					<span data-uix-control-label>locale</span>
					<select bind:value={locale}>
						<option value="en-US">en-US</option>
						<option value="es-ES">es-ES</option>
						<option value="fr-FR">fr-FR</option>
					</select>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>direction</span>
					<span data-uix-chips role="radiogroup">
						{#each ['ltr', 'rtl'] as v (v)}
							<button data-uix-chip data-active={dir === v} onclick={() => (dir = v as 'ltr' | 'rtl')}>{v}</button>
						{/each}
					</span>
				</label>
			</div>

			<div data-uix-subsection-head>
				<span data-uix-layer-badge="soma">soma</span> feature toggles
			</div>
			<div data-uix-controls>
				<label data-uix-control>
					<span data-uix-control-label>selectionMode</span>
					<span data-uix-chips role="radiogroup">
						{#each ['none', 'single', 'multiple'] as m (m)}
							<button data-uix-chip data-active={selectionMode === m} onclick={() => (selectionMode = m as TreeGridSelectionMode)}>{m}</button>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>loop</span>
					<span data-uix-switch>
						<input type="checkbox" bind:checked={loop} />
						<span data-uix-switch-label>{loop ? 'wrap' : 'clamp'}</span>
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>typeahead</span>
					<span data-uix-switch>
						<input type="checkbox" bind:checked={typeahead} />
						<span data-uix-switch-label>{typeahead ? 'on' : 'off'}</span>
					</span>
				</label>
			</div>

			<div data-uix-subsection-head>
				<span data-uix-layer-badge="eidos">eidos</span> visual props
			</div>
			<div data-uix-controls>
				<label data-uix-control>
					<span data-uix-control-label>columns</span>
					<input type="text" bind:value={columns} style="inline-size: 14rem; padding: 0.25rem 0.5rem; border: 1px solid var(--color-border-default); border-radius: var(--radius-sm); background: var(--color-surface-default); font: inherit;" />
				</label>
				<label data-uix-control>
					<span data-uix-control-label>variant</span>
					<span data-uix-chips role="radiogroup">
						{#each ['surface', 'outline', 'ghost'] as v (v)}
							<button data-uix-chip data-active={variant === v} onclick={() => (variant = v as TreeGridVariant)}>{v}</button>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>size</span>
					<span data-uix-chips role="radiogroup">
						{#each ['xs', 'sm', 'md', 'lg', 'xl'] as s (s)}
							<button data-uix-chip data-active={size === s} onclick={() => (size = s as TreeGridSize)}>{s}</button>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>color</span>
					<span data-uix-chips role="radiogroup">
						{#each ['primary', 'secondary', 'neutral', 'affirm', 'fulfill', 'risk', 'threat', 'loss'] as c (c)}
							<button data-uix-chip data-active={color === c} onclick={() => (color = c as TreeGridColor)}>{c}</button>
						{/each}
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>block</span>
					<span data-uix-switch>
						<input type="checkbox" bind:checked={block} />
						<span data-uix-switch-label>{block ? 'on' : 'off'}</span>
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>striped</span>
					<span data-uix-switch>
						<input type="checkbox" bind:checked={striped} />
						<span data-uix-switch-label>{striped ? 'on' : 'off'}</span>
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>hoverable</span>
					<span data-uix-switch>
						<input type="checkbox" bind:checked={hoverable} />
						<span data-uix-switch-label>{hoverable ? 'on' : 'off'}</span>
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>showIndentGuides</span>
					<span data-uix-switch>
						<input type="checkbox" bind:checked={showIndentGuides} />
						<span data-uix-switch-label>{showIndentGuides ? 'on' : 'off'}</span>
					</span>
				</label>
				<label data-uix-control>
					<span data-uix-control-label>scrollable</span>
					<span data-uix-switch>
						<input type="checkbox" bind:checked={useScrollRegion} />
						<span data-uix-switch-label>{useScrollRegion ? 'maxHeight=22rem' : 'off'}</span>
					</span>
				</label>
			</div>

			<div data-uix-code>
				<div data-uix-code-head>
					<span data-uix-layer-badge="eidos">eidos</span>
					<span>visual · TreeGrid + columns + recursive Rows</span>
					<span data-uix-code-lang>svelte</span>
				</div>
				<pre><code>{eidosSnippet}</code></pre>
			</div>
		</section>
	{/if}

	{#if tab === 'api'}
		<section data-uix-section>
			<h2 data-uix-section-title>API reference</h2>
			<p data-uix-section-desc>
				7 parts: <code>Provider · Header · ColumnHeader · Row · RowChildren · Cell · ExpandTrigger</code>. Rows declare <code>hasChildren</code> to participate in the expand/collapse contract; <code>level</code> is auto-derived from DOM ancestry. The <code>columns</code> prop drives a CSS-Grid layout shared by Header + every Row.
			</p>

			<div data-uix-subsection-head>Provider (TreeGrid)</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Prop</th><th>Type</th><th>Default</th><th>Description</th></tr></thead>
					<tbody>
						<tr><td class="name">expanded <span data-uix-tag data-kind="bindable">bindable</span></td><td class="type">string[]</td><td class="default">[]</td><td>Expanded row values.</td></tr>
						<tr><td class="name">value <span data-uix-tag data-kind="bindable">bindable</span></td><td class="type">string[]</td><td class="default">[]</td><td>Selected row values.</td></tr>
						<tr><td class="name">selectionMode</td><td class="type">'none' | 'single' | 'multiple'</td><td class="default">'single'</td><td>—</td></tr>
						<tr><td class="name">loop</td><td class="type">boolean</td><td class="default">false</td><td>Arrow navigation wraps.</td></tr>
						<tr><td class="name">typeahead</td><td class="type">boolean</td><td class="default">true</td><td>Letter keys jump to matching row.</td></tr>
						<tr><td class="name">disabled · readonly</td><td class="type">boolean</td><td class="default">false</td><td>Standard form-control flags.</td></tr>
						<tr><td class="name">columns <span data-uix-tag data-kind="eidos">eidos</span></td><td class="type">string</td><td class="default">'1fr'</td><td>CSS grid-template-columns.</td></tr>
						<tr><td class="name">variant <span data-uix-tag data-kind="eidos">eidos</span></td><td class="type">'surface' | 'outline' | 'ghost'</td><td class="default">'surface'</td><td>—</td></tr>
						<tr><td class="name">size <span data-uix-tag data-kind="eidos">eidos</span></td><td class="type">'xs' | 'sm' | 'md' | 'lg' | 'xl'</td><td class="default">'md'</td><td>Row + indent + font scale.</td></tr>
						<tr><td class="name">color <span data-uix-tag data-kind="eidos">eidos</span></td><td class="type">ColorRole</td><td class="default">'primary'</td><td>Accent for selected + focus.</td></tr>
						<tr><td class="name">block <span data-uix-tag data-kind="eidos">eidos</span></td><td class="type">boolean</td><td class="default">true</td><td>Stretch to container width.</td></tr>
						<tr><td class="name">striped <span data-uix-tag data-kind="eidos">eidos</span></td><td class="type">boolean</td><td class="default">false</td><td>Alternate top-level row tint.</td></tr>
						<tr><td class="name">hoverable <span data-uix-tag data-kind="eidos">eidos</span></td><td class="type">boolean</td><td class="default">true</td><td>Row hover highlight.</td></tr>
						<tr><td class="name">showIndentGuides <span data-uix-tag data-kind="eidos">eidos</span></td><td class="type">boolean</td><td class="default">false</td><td>Vertical guide lines per depth.</td></tr>
						<tr><td class="name">maxHeight <span data-uix-tag data-kind="eidos">eidos</span></td><td class="type">string</td><td class="default empty">—</td><td>Wraps in a scrolling region.</td></tr>
						<tr><td class="name">stableRows <span data-uix-tag data-kind="eidos">eidos</span></td><td class="type">number</td><td class="default empty">—</td><td>Reserve N rows + header of vertical space.</td></tr>
					</tbody>
				</table>
			</div>

			<div data-uix-subsection-head>Row</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Prop</th><th>Type</th><th>Default</th><th>Description</th></tr></thead>
					<tbody>
						<tr><td class="name">value</td><td class="type">string</td><td class="default empty">required</td><td>Unique node identifier.</td></tr>
						<tr><td class="name">hasChildren</td><td class="type">boolean</td><td class="default">false</td><td>Declares the row as a branch — drives <code>aria-expanded</code> + Arrow Right/Left.</td></tr>
						<tr><td class="name">disabled</td><td class="type">boolean</td><td class="default">false</td><td>Skip from roving set.</td></tr>
						<tr><td class="name">textValue</td><td class="type">string</td><td class="default empty">—</td><td>Override label for typeahead.</td></tr>
					</tbody>
				</table>
			</div>
		</section>
	{/if}

	{#if tab === 'morfo'}
		<section data-uix-section>
			<h2 data-uix-section-title>
				<span data-uix-layer-badge="morfo">morfo</span>
				· declarative contract
			</h2>
			<p data-uix-section-desc>Source: <code>src/uix/morfo/components/tree-grid.ts</code>.</p>

			<div data-uix-subsection-head>Parts</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Part</th><th>Marker</th><th>Element</th><th>Role</th><th>Archetype</th><th>States</th><th>Optional</th></tr></thead>
					<tbody>
						{#each partsList as part (part.kebab)}
							<tr>
								<td class="name">{part.kebab}</td>
								<td><code data-uix-part-marker>[{part.marker}]</code></td>
								<td class="type">&lt;{part.defaultElement}&gt;</td>
								<td class="type">{part.role ?? '—'}</td>
								<td class="default">{part.archetype ?? '—'}</td>
								<td class="default">{part.states.length ? part.states.join(' | ') : '—'}</td>
								<td class="default">{part.optional ? 'yes' : 'no'}</td>
							</tr>
						{/each}
					</tbody>
				</table>
			</div>

			<div data-uix-subsection-head>Events declaration</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>name</th><th>family</th><th>verb</th><th>sequence</th><th>intent</th><th>target</th></tr></thead>
					<tbody>
						{#each events as action (action.name)}
							{@const sem = action.semantic}
							{@const intentDecl = 'intent' in sem ? sem.intent : undefined}
							{@const intentStr = typeof intentDecl === 'string' ? intentDecl : intentDecl ? `fromProp:${(intentDecl as { fromProp?: string }).fromProp ?? '?'}` : '—'}
							<tr>
								<td class="name">{action.name}</td>
								<td class="type">{sem.family}</td>
								<td>{sem.verb ?? '—'}</td>
								<td>{sem.sequence ?? 'pre'}</td>
								<td class="default">{intentStr}</td>
								<td>{action.target}</td>
							</tr>
						{/each}
					</tbody>
				</table>
			</div>
		</section>
	{/if}

	{#if tab === 'sema'}
		<section data-uix-section id="sema">
			<h2 data-uix-section-title>
				<span data-uix-layer-badge="sema">sema</span>
				· events
			</h2>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Name</th><th>Family</th><th>Verb</th><th>Sequence</th><th>Intent</th><th>Play</th></tr></thead>
					<tbody>
						{#each events as action (action.name)}
							{@const intentDecl = 'intent' in action.semantic ? action.semantic.intent : undefined}
							{@const effectiveIntent = typeof intentDecl === 'string' ? intentDecl : undefined}
							<tr>
								<td class="name">{action.name}</td>
								<td class="type">{action.semantic.family}</td>
								<td>{action.semantic.verb ?? '—'}</td>
								<td>{action.semantic.sequence ?? 'pre'}</td>
								<td class="default">{effectiveIntent ?? '—'}</td>
								<td>
									<button
										data-uix-play
										onclick={() => {
											const target = (stageRef?.querySelector('[data-tree-grid-row]') ?? stageRef) as HTMLElement | null;
											if (!target) return;
											void uix.events?.emit({
												name: action.name,
												family: action.semantic.family,
												target,
												...(effectiveIntent ? { intent: effectiveIntent } : {})
											});
										}}
									>▶ play</button>
								</td>
							</tr>
						{/each}
					</tbody>
				</table>
			</div>
		</section>
	{/if}

	{#if tab === 'recipe'}
		<section data-uix-section>
			<h2 data-uix-section-title>Eidos recipe</h2>
			<p data-uix-section-desc>Selectors at <code>src/uix/eidos/components/tree-grid/tree-grid.css</code>. Visual data-attrs live on the <code>&lt;div data-tree-grid-root&gt;</code> wrapper. Layout uses CSS Grid — every Row + Header inherits <code>grid-template-columns: var(--_tree-grid-columns)</code>.</p>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Selector</th><th>Source</th><th>What it paints</th></tr></thead>
					<tbody>
						<tr><td class="name">[data-tree-grid-root]</td><td><span data-uix-tag data-kind="eidos">eidos</span></td><td>Wrapper — radius, border, scroll cap.</td></tr>
						<tr><td class="name">[data-tree-grid-root][data-variant]</td><td><span data-uix-tag data-kind="eidos">eidos</span></td><td>Border + background per variant.</td></tr>
						<tr><td class="name">[data-tree-grid-root][data-size]</td><td><span data-uix-tag data-kind="eidos">eidos</span></td><td>Row + indent + font-size scale.</td></tr>
						<tr><td class="name">[data-tree-grid-row]</td><td><span data-uix-tag data-kind="eidos">eidos</span></td><td>CSS Grid row layout.</td></tr>
						<tr><td class="name">[data-tree-grid-row][aria-selected="true"]</td><td><span data-uix-tag data-kind="soma">morfo</span></td><td>Selected-row accent-soft fill.</td></tr>
						<tr><td class="name">[data-tree-grid-row][aria-level]</td><td><span data-uix-tag data-kind="soma">morfo</span></td><td>Depth-based first-cell padding (1-8).</td></tr>
						<tr><td class="name">[data-tree-grid-row-children]</td><td><span data-uix-tag data-kind="eidos">eidos</span></td><td><code>display:contents</code> — child rows join parent grid.</td></tr>
						<tr><td class="name">[data-tree-grid-root][data-indent-guides]</td><td><span data-uix-tag data-kind="eidos">eidos</span></td><td>Vertical guide stripes via background-image.</td></tr>
						<tr><td class="name">[data-tree-grid-expand-trigger][data-state]</td><td><span data-uix-tag data-kind="soma">morfo</span></td><td>Chevron rotation (open/closed).</td></tr>
					</tbody>
				</table>
			</div>
		</section>
	{/if}

	{#if tab === 'a11y'}
		<section data-uix-section>
			<h2 data-uix-section-title>Accessibility</h2>
			<p data-uix-section-desc>
				Follows the APG <a href={treeGridMorfo.apg} target="_blank" rel="noreferrer">treegrid pattern</a>. Root is <code>role="treegrid"</code>, rows are <code>role="row"</code>, header cells are <code>role="columnheader"</code>, body cells are <code>role="gridcell"</code>. Roving tabindex; arrows traverse rows; Right/Left expand/collapse on branches; Home/End jump to first/last; PageUp/PageDown move by ~10 rows.
			</p>

			<div data-uix-subsection-head>Keyboard</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Key</th><th>Action</th></tr></thead>
					<tbody>
						<tr><td><span data-uix-kbd>ArrowDown</span> / <span data-uix-kbd>ArrowUp</span></td><td>Move focus through visible rows.</td></tr>
						<tr><td><span data-uix-kbd>ArrowRight</span></td><td>Expand the focused branch row; if already open, focus the first child.</td></tr>
						<tr><td><span data-uix-kbd>ArrowLeft</span></td><td>Collapse the focused branch; if leaf/closed, focus the parent.</td></tr>
						<tr><td><span data-uix-kbd>Home</span> / <span data-uix-kbd>End</span></td><td>First / last visible row.</td></tr>
						<tr><td><span data-uix-kbd>PageUp</span> / <span data-uix-kbd>PageDown</span></td><td>Jump ~10 rows.</td></tr>
						<tr><td><span data-uix-kbd>Enter</span> / <span data-uix-kbd>Space</span></td><td>Toggle selection of the focused row.</td></tr>
						<tr><td>Letter / digit</td><td>Typeahead — focus next matching row.</td></tr>
					</tbody>
				</table>
			</div>

			<div data-uix-subsection-head>ARIA contract</div>
			<div data-uix-table-wrap>
				<table data-uix-table>
					<thead><tr><th>Part</th><th>Attribute</th><th>Value</th></tr></thead>
					<tbody>
						<tr><td class="name">Provider</td><td>role</td><td class="type">"treegrid"</td></tr>
						<tr><td class="name">Provider</td><td>aria-multiselectable</td><td class="type">"true" (multiple mode)</td></tr>
						<tr><td class="name">Header</td><td>role</td><td class="type">"row"</td></tr>
						<tr><td class="name">ColumnHeader</td><td>role</td><td class="type">"columnheader"</td></tr>
						<tr><td class="name">Row</td><td>role / aria-level</td><td class="type">"row" / 1-based auto</td></tr>
						<tr><td class="name">Row</td><td>aria-expanded</td><td class="type">"true" | "false" (branches only)</td></tr>
						<tr><td class="name">Row</td><td>aria-selected</td><td class="type">"true" | "false"</td></tr>
						<tr><td class="name">Cell</td><td>role</td><td class="type">"gridcell"</td></tr>
						<tr><td class="name">RowChildren</td><td>role</td><td class="type">"group"</td></tr>
						<tr><td class="name">ExpandTrigger</td><td>aria-label / aria-hidden</td><td class="type">translated / "true"</td></tr>
					</tbody>
				</table>
			</div>
		</section>
	{/if}
</div>