feat(board): per-lane sort override in the kebab menu (TASK-1673) (#677)

Add a "Sort lane by" drill-down to LaneActionsMenu — an ephemeral
per-lane override on top of the page-wide sort. BoardView holds the
override map (Record<lane, SortMode>, not persisted), applies the
effective mode (override ?? page default) per lane in propColumnData,
and disables drag per-lane under a non-manual effective sort. The
submenu lists the same options as the toolbar (Priority hidden when no
priority field) plus a "Page default" entry to clear the override, with
a check on the active one.

Sort is a view preference, available to everyone — so the kebab now
shows for any non-empty lane (not just editors), and the menu's
separators are section-gated so nothing dangles when a viewer sees only
Sort.

web/src/lib/components/collections/BoardView.svelte

@@ -82,22 +82,18 @@
 		openMenuColumn = null;
 	}
 
-	// Any bulk verb wired (each encodes its own owner/editor permission).
-	// The bulk menu entries only render for a NON-empty lane, so kebab
-	// visibility is computed per-lane below as `onCreateInColumn ||
-	// (laneHasItems && hasBulkActions)` — otherwise a role-only bulk
-	// editor would get a ⋯ that opens an empty panel on an empty lane
-	// (TASK-1672 / Codex round 5).
-	let hasBulkActions = $derived(
-		!!(
-			onArchiveColumn ||
-			onMoveColumn ||
-			onTagColumn ||
-			onUntagColumn ||
-			onSetPriorityColumn ||
-			onAssignColumn
-		)
-	);
+	// Ephemeral per-lane sort overrides (TASK-1673): a lane sorts by its
+	// override when set, else the page-wide `sortMode`. Not persisted —
+	// cleared on reload. Available to everyone (sort is a view preference).
+	let laneSortOverrides = $state<Record<string, SortMode>>({});
+	function setLaneSort(colValue: string, mode: SortMode | null) {
+		if (mode === null) {
+			delete laneSortOverrides[colValue];
+		} else {
+			laneSortOverrides[colValue] = mode;
+		}
+	}
+	const laneSortFor = (colValue: string): SortMode => laneSortOverrides[colValue] ?? sortMode;
 
 	// Dismiss the open lane menu on any click outside it (mirrors the
 	// QuickActionsMenu pattern). The menu markup lives under
@@ -201,12 +197,12 @@
 		}
 		// `preserveOrder` opts out of the in-column sort so search rank
 		// from the parent isn't overridden — TASK-1367. Otherwise sort
-		// each lane by the page-wide sort mode (TASK-1670); 'manual'
+		// each lane by its effective mode — the per-lane override if set,
+		// else the page-wide sort (TASK-1670 / TASK-1673); 'manual'
 		// resolves to the stored sort_order, preserving prior behavior.
 		if (!preserveOrder) {
-			const cmp = itemComparator(sortMode, collection);
 			for (const col of columns) {
-				result[col].sort(cmp);
+				result[col].sort(itemComparator(laneSortFor(col), collection));
 			}
 		}
 		return result;
@@ -339,7 +335,9 @@
 							onclick={() => onCreateInColumn?.(colValue)}
 						>+</button>
 					{/if}
-					{#if onCreateInColumn || (colItems.length > 0 && hasBulkActions)}
+					<!-- Kebab shows for create OR any non-empty lane (sort is
+					     always available, even to viewers — TASK-1673). -->
+					{#if onCreateInColumn || colItems.length > 0}
 						<div class="lane-menu-wrap">
 							<button
 								class="lane-btn lane-menu-btn"
@@ -358,6 +356,9 @@
 									{filtered}
 									{members}
 									{tagSuggestions}
+									{sortMode}
+									laneSort={laneSortOverrides[colValue]}
+									onSetLaneSort={(m) => setLaneSort(colValue, m)}
 									onClose={closeMenu}
 									onAddItem={onCreateInColumn ? () => onCreateInColumn?.(colValue) : undefined}
 									onArchive={onArchiveColumn ? () => onArchiveColumn?.(colItems) : undefined}
@@ -389,7 +390,7 @@
 					// under any non-manual page sort (TASK-1670): the
 					// lane is comparator-ordered, so a drag couldn't
 					// stick anyway.
-					dragDisabled: isMobile || !canEdit || preserveOrder || sortMode !== 'manual'
+					dragDisabled: isMobile || !canEdit || preserveOrder || laneSortFor(colValue) !== 'manual'
 				}}
 				onconsider={(e) => handleConsider(colValue, e)}
 				onfinalize={(e) => handleFinalize(colValue, e)}

web/src/lib/components/collections/LaneActionsMenu.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
 	import type { Item, Collection } from '$lib/types';
 	import { parseSchema } from '$lib/types';
+	import { SORT_OPTIONS, priorityField, type SortMode } from '$lib/collections/itemSort';
 
 	interface Props {
 		/** The lane's CURRENTLY-FILTERED items — every action operates on these. */
@@ -15,6 +16,13 @@
 		members: { user_id: string; user_name?: string }[];
 		/** Workspace tag suggestions for "Tag all". */
 		tagSuggestions: string[];
+		// Page-wide sort default + this lane's ephemeral override (TASK-1673).
+		// `laneSort` undefined = follow the page default. onSetLaneSort(null)
+		// clears the override. Sorting is a view preference, available to
+		// everyone (including viewers) — not gated on edit permission.
+		sortMode?: SortMode;
+		laneSort?: SortMode;
+		onSetLaneSort?: (mode: SortMode | null) => void;
 		onClose: () => void;
 		// Each action is optional: the caller passes only the ones the
 		// current user is permitted to perform (the single `+` create is
@@ -37,6 +45,9 @@
 		filtered,
 		members,
 		tagSuggestions,
+		sortMode = 'manual',
+		laneSort = undefined,
+		onSetLaneSort,
 		onClose,
 		onAddItem,
 		onArchive,
@@ -47,7 +58,7 @@
 		onAssign
 	}: Props = $props();
 
-	type View = 'root' | 'move' | 'tag' | 'untag' | 'priority' | 'assign';
+	type View = 'root' | 'move' | 'tag' | 'untag' | 'priority' | 'assign' | 'sort';
 	let view = $state<View>('root');
 	let confirmArchive = $state(false);
 	let tagInput = $state('');
@@ -70,6 +81,18 @@
 	);
 	let priorityOptions = $derived(priorityFieldDef?.options ?? []);
 
+	// Sort options offered in the "Sort lane by" submenu — same set the
+	// page toolbar uses, minus Priority when the collection has no priority
+	// field (TASK-1673). `effectiveSort` is the lane's current order: its
+	// override if set, else the page default.
+	let sortOptions = $derived(
+		priorityField(collection) ? SORT_OPTIONS : SORT_OPTIONS.filter((o) => o.value !== 'priority')
+	);
+	let effectiveSort = $derived(laneSort ?? sortMode);
+	let sortLabel = $derived(
+		SORT_OPTIONS.find((o) => o.value === effectiveSort)?.label ?? 'Manual'
+	);
+
 	// Untag offers only the tags actually present on the lane's items.
 	let laneTags = $derived.by(() => {
 		const set = new Set<string>();
@@ -83,6 +106,20 @@
 		return [...set].sort();
 	});
 
+	// Section presence — drives separators so none dangle when a section
+	// (e.g. the bulk verbs for a viewer) is empty. Declared after laneTags
+	// since hasVerbs references it.
+	let hasSort = $derived(count > 0 && !!onSetLaneSort);
+	let hasVerbs = $derived(
+		count > 0 &&
+			(!!(onMove && moveTargets.length) ||
+				!!onTag ||
+				!!(onUntag && laneTags.length) ||
+				!!(onSetPriority && priorityOptions.length) ||
+				!!(onAssign && members.length))
+	);
+	let hasArchive = $derived(count > 0 && !!onArchive);
+
 	function fmt(v: string): string {
 		return v.replace(/_/g, ' ').replace(/\b\w/g, (c) => c.toUpperCase());
 	}
@@ -113,9 +150,16 @@
 			</button>
 		{/if}
 
-		{#if count > 0}
-			<div class="lane-menu-sep"></div>
+		{#if hasSort}
+			{#if onAddItem}<div class="lane-menu-sep"></div>{/if}
+			<button class="lane-menu-item" role="menuitem" onclick={(e) => run(e, () => (view = 'sort'))}>
+				<span class="lmi-icon" aria-hidden="true">↕</span> Sort lane by
+				<span class="lmi-chevron">{sortLabel} ›</span>
+			</button>
+		{/if}
 
+		{#if hasVerbs}
+			{#if onAddItem || hasSort}<div class="lane-menu-sep"></div>{/if}
 			{#if onMove && moveTargets.length > 0}
 				<button class="lane-menu-item" role="menuitem" onclick={(e) => run(e, () => (view = 'move'))}>
 					<span class="lmi-icon" aria-hidden="true">→</span> Move all to <span class="lmi-chevron">›</span>
@@ -145,22 +189,22 @@
 					<span class="lmi-icon" aria-hidden="true">👤</span> Assign all <span class="lmi-chevron">›</span>
 				</button>
 			{/if}
+		{/if}
 
-			{#if onArchive}
-				<div class="lane-menu-sep"></div>
-				{#if confirmArchive}
-					<div class="lane-menu-confirm">
-						<span>Archive {count} item{count === 1 ? '' : 's'}{scopeNote}?</span>
-						<div class="lmc-actions">
-							<button class="lmc-yes" onclick={(e) => run(e, () => { onArchive?.(); onClose(); })}>Archive</button>
-							<button class="lmc-no" onclick={(e) => run(e, () => (confirmArchive = false))}>Cancel</button>
-						</div>
+		{#if hasArchive}
+			{#if onAddItem || hasSort || hasVerbs}<div class="lane-menu-sep"></div>{/if}
+			{#if confirmArchive}
+				<div class="lane-menu-confirm">
+					<span>Archive {count} item{count === 1 ? '' : 's'}{scopeNote}?</span>
+					<div class="lmc-actions">
+						<button class="lmc-yes" onclick={(e) => run(e, () => { onArchive?.(); onClose(); })}>Archive</button>
+						<button class="lmc-no" onclick={(e) => run(e, () => (confirmArchive = false))}>Cancel</button>
 					</div>
-				{:else}
-					<button class="lane-menu-item lmi-danger" role="menuitem" onclick={(e) => run(e, () => (confirmArchive = true))}>
-						<span class="lmi-icon" aria-hidden="true">🗃</span> Archive all ({count}{scopeNote})
-					</button>
-				{/if}
+				</div>
+			{:else}
+				<button class="lane-menu-item lmi-danger" role="menuitem" onclick={(e) => run(e, () => (confirmArchive = true))}>
+					<span class="lmi-icon" aria-hidden="true">🗃</span> Archive all ({count}{scopeNote})
+				</button>
 			{/if}
 		{/if}
 	{:else if view === 'move'}
@@ -211,6 +255,31 @@
 				</button>
 			{/each}
 		{/if}
+	{:else if view === 'sort'}
+		<button class="lane-menu-back" onclick={(e) => run(e, () => (view = 'root'))}>‹ Sort lane by</button>
+		<!-- Clear the ephemeral override → follow the page-wide sort. -->
+		<button
+			class="lane-menu-item"
+			role="menuitemradio"
+			aria-checked={laneSort === undefined}
+			onclick={(e) => run(e, () => { onSetLaneSort?.(null); onClose(); })}
+		>
+			<span class="lmi-check" aria-hidden="true">{laneSort === undefined ? '✓' : ''}</span>
+			Page default
+			<span class="lmi-chevron">{SORT_OPTIONS.find((o) => o.value === sortMode)?.label}</span>
+		</button>
+		<div class="lane-menu-sep"></div>
+		{#each sortOptions as opt (opt.value)}
+			<button
+				class="lane-menu-item"
+				role="menuitemradio"
+				aria-checked={laneSort === opt.value}
+				onclick={(e) => run(e, () => { onSetLaneSort?.(opt.value); onClose(); })}
+			>
+				<span class="lmi-check" aria-hidden="true">{laneSort === opt.value ? '✓' : ''}</span>
+				{opt.label}
+			</button>
+		{/each}
 	{/if}
 </div>
 
@@ -266,6 +335,13 @@
 		flex-shrink: 0;
 	}
 
+	.lmi-check {
+		width: 1.1em;
+		flex-shrink: 0;
+		color: var(--accent-blue);
+		font-size: 0.9em;
+	}
+
 	.lmi-chevron {
 		margin-left: auto;
 		color: var(--text-muted);