HEL-689: deploy S4 three-band desk console (feat/hel-683-desk-console @ bef28fa)

feat(desk): 三段式图片/视频生成台——任务模式栏+工作流挑选台+摘要带 (HEL-683 S4)
- 新增 components/desk/：StudioDesk 取代 StudioGenerate 成为 /image、/video 共用页面；TaskModeRail（真实计数、未覆盖置灰、收藏/最近）、WorkflowBay （搜索、本机/云端分段、模型家族分组、待确认入口、增量渲染）、 WorkflowPreview（输入要求预览）、LibraryRow/LibraryFilters/ InputRequirementBadge - 挑选时中栏 grid 列宽展开、右侧显示预览；选定后收成摘要带； data-reduce 直接跳变；≤1179px 挑选台为全屏浮层，≤760px 任务模式横条 - 挑选侧全部走 view=meta 轻量元数据，完整记录按 id 惰性加载；云端来源诚实标注未接入；?wf/?mode 深链；五阶段上下文与返回路径不变 - Composer 工作流芯片改为展开挑选台，删除 WorkflowPicker； i18n 29 键 ×7 语言；changelog - e2e/shoot.mjs 适配挑选台键盘链，并修正 7 处 S1 灰阶化后失效的旧色值/文案断言（定影 + theme-1 灰阶信号色） Co-authored-by: multica-agent <github@multica.ai>
2026-10-11 13:52:49 +08:00 · 2026-10-11 13:19:30 +08:00
20 changed files with 2149 additions and 405 deletions
@@ -0,0 +1,79 @@
+<script lang="ts">
+	import Icon from '$lib/components/ui/Icon.svelte';
+	import type { WorkflowMediaIO } from '$lib/comfy/types';
+	import { t } from '$lib/i18n.svelte';
+
+	/**
+	 * 输入要求徽标 (HEL-683)：一个工作流真实声明 的进出媒介，
+	 * 来自 S2 元数据——图标+文字双编码，只报真实接线，不虚构输入。
+	 */
+	interface Props {
+		io: WorkflowMediaIO | null | undefined;
+		/** Compact form for row summaries (no out side when empty-in). */
+		compact?: boolean;
+	}
+
+	let { io, compact = false }: Props = $props();
+
+	type Medium = 'image' | 'video' | 'audio';
+
+	const LABELS: Record<Medium, string> = {
+		image: 'wl.mediaImage',
+		video: 'wl.mediaVideo',
+		audio: 'wl.mediaAudio',
+	};
+
+	const inList = $derived(((io?.in ?? []) as Medium[]).filter((m) => m in LABELS));
+	const outList = $derived(((io?.out ?? []) as Medium[]).filter((m) => m in LABELS));
+</script>
+
+{#if inList.length || outList.length}
+	<span class="req" aria-label={t('desk.bayReqAria')}>
+		{#each inList as m (m)}
+			<span class="pill in" title="{t(LABELS[m])} · {t('wl.mediaIn')}">
+				<Icon name={m === 'image' ? 'image' : m === 'video' ? 'film' : 'music'} size={12} />
+				{#if !compact}<span class="lbl">{t(LABELS[m])}</span>{/if}
+			</span>
+		{/each}
+		{#if inList.length && outList.length}<span class="arrow">→</span>{/if}
+		{#each outList as m (m)}
+			<span class="pill out" title="{t(LABELS[m])} · {t('wl.mediaOut')}">
+				<Icon name={m === 'image' ? 'image' : m === 'video' ? 'film' : 'music'} size={12} />
+				{#if !compact}<span class="lbl">{t(LABELS[m])}</span>{/if}
+			</span>
+		{/each}
+	</span>
+{:else if !compact}
+	<span class="pill none" title={t('desk.promptOnly')}><span class="lbl">{t('desk.promptOnly')}</span></span>
+{/if}
+
+<style>
+	.req {
+		display: inline-flex;
+		align-items: center;
+		gap: 3px;
+		flex-wrap: wrap;
+	}
+	.pill {
+		display: inline-flex;
+		align-items: center;
+		gap: 3px;
+		height: 18px;
+		padding: 0 5px;
+		border-radius: var(--r-sm);
+		background: var(--bg-4);
+		color: var(--text-2);
+		font-size: var(--fs-mini);
+		white-space: nowrap;
+	}
+	.pill.in {
+		color: var(--text);
+	}
+	.pill.none .lbl {
+		color: var(--text-3);
+	}
+	.arrow {
+		color: var(--text-3);
+		font-size: var(--fs-mini);
+	}
+</style>
@@ -0,0 +1,124 @@
+<script lang="ts">
+	import Icon from '$lib/components/ui/Icon.svelte';
+	import { t } from '$lib/i18n.svelte';
+
+	/**
+	 * 挑选台筛选行 (HEL-683)：搜索框 + 本机/云端来源分段 + 仅收藏开关。
+	 * 云端分段是诚实的占位——云端生成能力尚未接入，切过去只看到说明。
+	 */
+	interface Props {
+		search: string;
+		source: 'local' | 'cloud';
+		favOnly: boolean;
+		resultHint: string;
+		searchEl?: HTMLInputElement | null;
+		onSetSearch: (v: string) => void;
+		onSetSource: (s: 'local' | 'cloud') => void;
+		onToggleFav: () => void;
+	}
+
+	let {
+		search,
+		source,
+		favOnly,
+		resultHint,
+		searchEl = $bindable(null),
+		onSetSearch,
+		onSetSource,
+		onToggleFav,
+	}: Props = $props();
+</script>
+
+<div class="filters">
+	<div class="search">
+		<Icon name="search" size={14} />
+		<input
+			bind:this={searchEl}
+			class="search-input"
+			type="search"
+			value={search}
+			placeholder={t('desk.baySearchPh')}
+			aria-label={t('desk.baySearchPh')}
+			aria-keyshortcuts="/"
+			oninput={(e) => onSetSearch(e.currentTarget.value)}
+		/>
+	</div>
+	<div class="a-seg source" role="group" aria-label={t('desk.baySourceLabel')}>
+		<button type="button" aria-pressed={source === 'local'} onclick={() => onSetSource('local')}>
+			{t('desk.baySourceLocal')}
+		</button>
+		<button type="button" aria-pressed={source === 'cloud'} onclick={() => onSetSource('cloud')}>
+			{t('desk.baySourceCloud')}
+		</button>
+	</div>
+	<button
+		type="button"
+		class="a-chip fav"
+		class:on={favOnly}
+		aria-pressed={favOnly}
+		title={t('desk.bayFavOnly')}
+		onclick={onToggleFav}
+	>
+		<Icon name="star" size={13} />
+		<span class="lbl">{t('desk.bayFavOnly')}</span>
+	</button>
+	<span class="hint">{resultHint}</span>
+</div>
+
+<style>
+	.filters {
+		display: flex;
+		align-items: center;
+		flex-wrap: wrap;
+		gap: var(--sp-2);
+	}
+	.search {
+		display: flex;
+		align-items: center;
+		gap: var(--sp-3);
+		flex: 1 1 180px;
+		min-width: 0;
+		height: 32px;
+		box-sizing: border-box;
+		padding: 0 var(--sp-3);
+		border: 1px solid var(--line);
+		border-radius: var(--r-md);
+		background: var(--bg-2);
+		color: var(--text-3);
+		transition: border-color var(--d-state) ease;
+	}
+	.search:focus-within {
+		border-color: var(--accent-line);
+	}
+	.search-input {
+		flex: 1;
+		min-width: 0;
+		border: 0;
+		outline: 0;
+		background: transparent;
+		color: var(--text);
+		font: inherit;
+		font-size: var(--fs-section);
+	}
+	.search-input::placeholder {
+		color: var(--text-3);
+	}
+	.source {
+		flex-shrink: 0;
+	}
+	.fav.on {
+		color: var(--accent);
+		background: var(--accent-soft);
+	}
+	.hint {
+		margin-left: auto;
+		color: var(--text-3);
+		font-size: var(--fs-mini);
+		white-space: nowrap;
+	}
+	@media (max-width: 760px) {
+		.hint {
+			display: none;
+		}
+	}
+</style>
@@ -0,0 +1,170 @@
+<script lang="ts">
+	import Icon from '$lib/components/ui/Icon.svelte';
+	import type { WorkflowMeta } from '$lib/comfy/types';
+	import { t } from '$lib/i18n.svelte';
+	import { usageLabel } from '$lib/components/generate/schema';
+	import InputRequirementBadge from './InputRequirementBadge.svelte';
+
+	/**
+	 * 挑选台一行 (HEL-683)：显示名 + 输入要求徽标 + 用途标签 + 端点/收藏
+	 * 标注。当前工作流行带取景框角线；键盘/指针悬停行只是背景高亮。
+	 */
+	interface Props {
+		meta: WorkflowMeta;
+		current: boolean;
+		active: boolean;
+		endpoints: Array<{ id: string; name: string }>;
+		onPick: () => void;
+		onActive: () => void;
+	}
+
+	let { meta, current, active, endpoints, onPick, onActive }: Props = $props();
+
+	const endpointName = $derived(
+		meta.endpoint_id
+			? (endpoints.find((e) => e.id === meta.endpoint_id)?.name ?? t('desk.wfDefaultConn'))
+			: t('desk.wfDefaultConn'),
+	);
+</script>
+
+<button
+	type="button"
+	class="row"
+	class:active
+	class:current
+	role="option"
+	aria-selected={active ? 'true' : undefined}
+	aria-current={current ? 'true' : undefined}
+	onclick={onPick}
+	onpointermove={onActive}
+	onfocus={onActive}
+>
+	<span class="main">
+		<span class="name">
+			{#if meta.favorite}<span class="fav"><Icon name="star" size={11} /></span>{/if}
+			<span class="name-txt">{meta.name}</span>
+			{#if current}<span class="cur-mark">{t('desk.wfCurrent')}</span>{/if}
+		</span>
+		<span class="sub">
+			<span class="a-tag">{usageLabel(meta.usage!)}</span>
+			<InputRequirementBadge io={meta.media_io} compact />
+		</span>
+	</span>
+	<span class="side">
+		<span class="conn" title="{t('studio.connLabel')}：{endpointName}">{endpointName}</span>
+	</span>
+</button>
+
+<style>
+	.row {
+		display: flex;
+		align-items: center;
+		gap: var(--sp-3);
+		width: 100%;
+		box-sizing: border-box;
+		padding: var(--sp-3) var(--sp-4);
+		border: 0;
+		border-radius: var(--r-md);
+		background: none;
+		color: var(--text);
+		font: inherit;
+		text-align: left;
+		cursor: pointer;
+		/* 长列表性能：视口外的行不参与布局/绘制。 */
+		content-visibility: auto;
+		contain-intrinsic-size: auto 52px;
+		transition: background-color var(--d-state) ease;
+	}
+	.row:hover,
+	.row.active {
+		background: var(--bg-3);
+	}
+	.row:focus-visible {
+		outline: none;
+		background: var(--bg-3);
+		box-shadow: 0 0 0 1px var(--accent-line);
+	}
+	.main {
+		display: grid;
+		gap: 3px;
+		flex: 1;
+		min-width: 0;
+	}
+	.name {
+		display: flex;
+		align-items: center;
+		gap: var(--sp-2);
+		min-width: 0;
+	}
+	.name-txt {
+		overflow: hidden;
+		text-overflow: ellipsis;
+		white-space: nowrap;
+		font-weight: 500;
+	}
+	.fav {
+		display: inline-flex;
+		flex-shrink: 0;
+		color: var(--accent);
+	}
+	.cur-mark {
+		flex-shrink: 0;
+		color: var(--text-3);
+		font-size: var(--fs-mini);
+	}
+	.sub {
+		display: flex;
+		align-items: center;
+		flex-wrap: wrap;
+		gap: var(--sp-1);
+	}
+	.side {
+		flex-shrink: 0;
+	}
+	.conn {
+		max-width: 120px;
+		overflow: hidden;
+		text-overflow: ellipsis;
+		white-space: nowrap;
+		color: var(--text-3);
+		font-size: var(--fs-mini);
+	}
+	/* 当前工作流：取景框角线（HEL-680 的内容级选中语言）。 */
+	.row.current {
+		position: relative;
+	}
+	.row.current::after {
+		content: '';
+		position: absolute;
+		inset: 2px;
+		pointer-events: none;
+		background-image:
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0);
+		background-position:
+			left top,
+			left top,
+			right top,
+			right top,
+			left bottom,
+			left bottom,
+			right bottom,
+			right bottom;
+		background-size:
+			var(--frame-arm, 12px) var(--frame-w, 2px),
+			var(--frame-w, 2px) var(--frame-arm, 12px),
+			var(--frame-arm, 12px) var(--frame-w, 2px),
+			var(--frame-w, 2px) var(--frame-arm, 12px),
+			var(--frame-arm, 12px) var(--frame-w, 2px),
+			var(--frame-w, 2px) var(--frame-arm, 12px),
+			var(--frame-arm, 12px) var(--frame-w, 2px),
+			var(--frame-w, 2px) var(--frame-arm, 12px);
+		background-repeat: no-repeat;
+	}
+</style>
@@ -2,7 +2,7 @@
 	import { createQuery, useQueryClient } from '@tanstack/svelte-query';
 	import { toStore } from 'svelte/store';
 	import { tick, untrack } from 'svelte';
-	import { SvelteSet } from 'svelte/reactivity';
+	import { SvelteMap, SvelteSet } from 'svelte/reactivity';
 	import { page } from '$app/state';
 	import Icon from '$lib/components/ui/Icon.svelte';
 	import Modal from '$lib/components/ui/Modal.svelte';
@@ -20,6 +20,7 @@
 		listPaths,
 		missingMedia,
 		schemaDefaults,
+		usageLabel,
 		validateForm,
 		type BlockReason,
 		type DeskKind,
@@ -27,8 +28,18 @@
 		type FormValues,
 	} from '$lib/components/generate/schema';
 	import { matchesFilter, type FeedFilter } from '$lib/components/generate/takes';
+	import InputRequirementBadge from './InputRequirementBadge.svelte';
+	import TaskModeRail from './TaskModeRail.svelte';
+	import WorkflowBay from './WorkflowBay.svelte';
+	import WorkflowPreview from './WorkflowPreview.svelte';
 	import { apiErrorMessage, assetUrl, comfy, jobsApi, playgroundApi, projects, settings, workflows } from '$lib/api';
-	import { USAGE_BY_KIND, type Job, type Workflow } from '$lib/comfy/types';
+	import {
+		USAGE_BY_KIND,
+		type Job,
+		type Workflow,
+		type WorkflowMeta,
+		type WorkflowUsage,
+	} from '$lib/comfy/types';
 	import { compactInputValues } from '$lib/comfy/promptInput';
 	import { connectEvents } from '$lib/events';
 	import { handleJobEvent } from '$lib/jobProgress';
@@ -38,11 +49,11 @@
 	import { t } from '$lib/i18n.svelte';

 	/**
-	 * 生成台 (spec-v2 §3.3, HEL-650 C 批): one desk for images and video — the
-	 * take feed with the composer below and the inspector on the right.
-	 * `/image` and `/video` only preselect: the default workflow comes from
-	 * that kind's usages and the feed opens filtered to it. Slots and params
-	 * follow the selected workflow's JSON (see generate/schema.ts).
+	 * 三段式生成台 (HEL-683, HEL-674 §二 / HEL-679 融合样稿): 左栏任务
+	 * 模式、中部工作流挑选台（挑选时展开，选定后收成摘要带）、右侧沿用
+	 * 参数与结果组件。`/image` 与 `/video` 共用本台，`kind` 决定任务模式，
+	 * `?wf=<id>` 深链指定工作流、`?mode=<usage>` 预选任务模式。项目五阶段
+	 * 的上下文条与返回路径保持不变（回流属 S5，不在本卡）。
 	 */
 	interface Props {
 		kind: DeskKind;
@@ -56,7 +67,10 @@
 	// Data
 	// ------------------------------------------------------------------
 	const settingsQuery = createQuery({ queryKey: ['settings'], queryFn: settings.get });
-	const workflowsQuery = createQuery({ queryKey: ['workflows'], queryFn: workflows.list });
+	// HEL-683: the desk browses S2's lightweight metadata (view=meta, no
+	// workflow_json). Full records are fetched per id on demand — the whole
+	// list (~7.6MB at 150+ rows) never loads here.
+	const metaQuery = createQuery({ queryKey: ['workflows-meta'], queryFn: workflows.listMeta });
 	const jobsQuery = createQuery({
 		queryKey: ['playground-jobs'],
 		queryFn: playgroundApi.jobs,
@@ -77,13 +91,75 @@
 	const activeId = $derived($settingsQuery.data?.comfyui_active_id ?? endpoints[0]?.id ?? '');
 	const dryRun = $derived($settingsQuery.data?.dry_run === true);

-	// HEL-636/638: only confirmed usages with a settled output mapping.
-	const deskWorkflows = $derived(
-		($workflowsQuery.data ?? []).filter((w) => w.is_enabled && (w.usage ?? null) !== null && !w.needs_mapping),
+	// Picker-side metadata: runnable rows of this kind + honest pending count.
+	const allMetas = $derived($metaQuery.data ?? []);
+	const metaById = $derived(new Map(allMetas.map((m) => [m.id, m])));
+	const deskMetas = $derived(
+		allMetas.filter((m) => m.is_enabled && m.usage !== null && !m.needs_mapping && m.kind === kind),
 	);
-	const workflowById = $derived(new Map(($workflowsQuery.data ?? []).map((w) => [w.id, w])));
-	const workflowOf = (job: Job): Workflow | undefined =>
-		job.workflow_id != null ? workflowById.get(job.workflow_id) : undefined;
+	const pendingCount = $derived(allMetas.filter((m) => m.needs_mapping && m.kind === kind).length);
+
+	// Full records, lazily fetched per id (selected workflow, feed jobs'
+	// workflows, the bay's preview row) and cached until invalidated.
+	const details = new SvelteMap<number, Workflow>();
+	const inflight = new Set<number>();
+
+	async function ensureDetail(id: number): Promise<Workflow | null> {
+		const hit = details.get(id);
+		if (hit) return hit;
+		if (inflight.has(id)) return null;
+		inflight.add(id);
+		try {
+			const wf = await workflows.get(id);
+			details.set(id, wf);
+			return wf;
+		} catch {
+			return null;
+		} finally {
+			inflight.delete(id);
+		}
+	}
+
+	const neededIds = $derived.by(() => {
+		const ids = new Set<number>();
+		if (workflowId != null) ids.add(workflowId);
+		if (bayOpen && bayActiveId != null) ids.add(bayActiveId);
+		for (const j of allJobs) if (j.workflow_id != null) ids.add(j.workflow_id);
+		return ids;
+	});
+
+	$effect(() => {
+		for (const id of neededIds) {
+			if (!details.has(id)) void ensureDetail(id);
+		}
+	});
+
+	/**
+	 * A job's workflow: the full record when loaded, else a metadata stub
+	 * (name/kind/usage render instantly; input-dependent views stay empty
+	 * until the record lands). Undefined only when the row is truly gone —
+	 * the 工作流已删除 tag stays honest.
+	 */
+	function stubFromMeta(m: WorkflowMeta): Workflow {
+		return {
+			id: m.id,
+			name: m.name,
+			kind: m.kind,
+			usage: m.usage,
+			is_enabled: m.is_enabled,
+			input_schema: [],
+			workflow_json: {},
+			description: m.description,
+			prompt_profile: m.prompt_profile,
+		} as unknown as Workflow;
+	}
+	const workflowOf = (job: Job): Workflow | undefined => {
+		if (job.workflow_id == null) return undefined;
+		const full = details.get(job.workflow_id);
+		if (full) return full;
+		const m = metaById.get(job.workflow_id);
+		return m ? stubFromMeta(m) : undefined;
+	};

 	const allJobs = $derived($jobsQuery.data ?? []);

@@ -136,6 +212,61 @@
 		return off;
 	});

+	// ------------------------------------------------------------------
+	// Bay (挑选台) state — mode, deep links, open/collapse
+	// ------------------------------------------------------------------
+	type TaskMode = WorkflowUsage | 'all';
+	let mode = $state<TaskMode>(untrack(initMode));
+	function initMode(): TaskMode {
+		const q = page.url.searchParams.get('mode');
+		return q && USAGE_BY_KIND[kind].includes(q as WorkflowUsage) ? (q as WorkflowUsage) : 'all';
+	}
+
+	let bayOpen = $state(false);
+	let bayActiveId = $state<number | null>(null);
+	let bay = $state<WorkflowBay | null>(null);
+
+	const modeMetas = $derived(mode === 'all' ? deskMetas : deskMetas.filter((m) => m.usage === mode));
+
+	function openBay() {
+		bayActiveId = workflowId;
+		bayOpen = true;
+	}
+
+	function closeBay() {
+		bayOpen = false;
+	}
+
+	function pickWorkflow(id: number) {
+		bayOpen = false;
+		if (id !== workflowId) workflowId = id;
+		void tick().then(() => promptEl?.focus());
+	}
+
+	// ?wf=<id> deep link: preselect once the metadata is in (invalid → ignored).
+	let wfDeepLinkDone = false;
+	$effect(() => {
+		if (wfDeepLinkDone) return;
+		const raw = Number(page.url.searchParams.get('wf'));
+		if (!Number.isInteger(raw) || raw <= 0) {
+			wfDeepLinkDone = true;
+			return;
+		}
+		if ($metaQuery.isLoading) return;
+		wfDeepLinkDone = true;
+		if (deskMetas.some((m) => m.id === raw)) workflowId = raw;
+	});
+
+	async function toggleFavorite(id: number, fav: boolean) {
+		try {
+			await workflows.update(id, { favorite: fav });
+			await client.invalidateQueries({ queryKey: ['workflows-meta'] });
+			await client.invalidateQueries({ queryKey: ['workflows'] });
+		} catch (err) {
+			toast.error(apiErrorMessage(err));
+		}
+	}
+
 	// ------------------------------------------------------------------
 	// Form state
 	// ------------------------------------------------------------------
@@ -150,7 +281,7 @@
 	let promptEl = $state<HTMLTextAreaElement | null>(null);
 	let pickerFor = $state<string | null>(null);

-	const currentWorkflow = $derived(deskWorkflows.find((w) => w.id === workflowId) ?? null);
+	const currentWorkflow = $derived(workflowId != null ? (details.get(workflowId) ?? null) : null);
 	const schema = $derived(currentWorkflow?.input_schema ?? []);
 	const ds = $derived(classifySchema(schema, currentWorkflow?.kind ?? kind));

@@ -161,16 +292,13 @@
 		endpointId = currentWorkflow?.endpoint_id ?? activeId ?? '';
 	});

-	// Default workflow: this entry's usages in priority order, runnable ones first.
+	// Default workflow: this entry's usages in priority order (metadata-side;
+	// error-level warnings surface through the block reason once loaded).
 	$effect(() => {
-		if (workflowId != null && deskWorkflows.some((w) => w.id === workflowId)) return;
+		if (workflowId != null && (details.has(workflowId) || deskMetas.some((m) => m.id === workflowId))) return;
 		const usages = USAGE_BY_KIND[kind];
-		const runnable = deskWorkflows.filter((w) => !(w.warnings ?? []).some((x) => x.level === 'error'));
-		const pick =
-			usages.map((u) => runnable.find((w) => w.usage === u)).find(Boolean) ??
-			deskWorkflows.find((w) => usages.includes(w.usage!)) ??
-			runnable[0] ??
-			deskWorkflows[0];
+		const candidates = deskMetas.filter((m) => m.usage != null && usages.includes(m.usage));
+		const pick = usages.map((u) => candidates.find((m) => m.usage === u)).find(Boolean) ?? candidates[0] ?? null;
 		workflowId = pick?.id ?? null;
 	});

@@ -328,6 +456,10 @@
 			openParams();
 			return;
 		}
+		if (b.target === 'desk-wf') {
+			openBay();
+			return;
+		}
 		await tick();
 		const el = b.target ? document.getElementById(b.target) : null;
 		if (el && !el.getClientRects().length) {
@@ -372,6 +504,8 @@
 			else if (!narrow) inspOpen = true;
 			await client.invalidateQueries({ queryKey: ['playground-jobs'] });
 			await client.invalidateQueries({ queryKey: ['jobs'] });
+			// 最近使用由后端在入队时记录 (queue/manager)；这里只刷新轻量列表。
+			void client.invalidateQueries({ queryKey: ['workflows-meta'] });
 		} catch (err) {
 			toast.error(t('studio.submitFailedToast', { detail: apiErrorMessage(err) }));
 		} finally {
@@ -494,9 +628,14 @@
 	}

 	/** Fill the composer back with a past take's values (on its own workflow). */
-	function reuse(job: Job) {
-		const wf = deskWorkflows.find((w) => w.id === job.workflow_id);
-		if (!wf) {
+	async function reuse(job: Job) {
+		const id = job.workflow_id;
+		if (id == null) {
+			toast.error(t('studio.reuseMissingWf'));
+			return;
+		}
+		const wf = (details.get(id) ?? (await ensureDetail(id))) as Workflow | null;
+		if (!wf || !(wf.input_schema ?? []).length) {
 			toast.error(t('studio.reuseMissingWf'));
 			return;
 		}
@@ -594,8 +733,9 @@
 	}

 	// ------------------------------------------------------------------
-	// 键盘 (§四.8): Ctrl/⌘+Enter 生成 · / 聚焦提示词 · ↑↓/J/K 切换记录
-	// （即时无动画）· 空格播放/暂停 · Delete 删选中 · ] 检视区 · Esc 关浮层
+	// 键盘 (§四.8): Ctrl/⌘+Enter 生成 · / 聚焦搜索/提示词 · ↑↓/J/K 切换
+	// （挑选台打开时游走挑选行，否则切换记录）· 空格播放/暂停 · Delete 删
+	// 选中 · ] 检视区 · Esc 关挑选台/浮层
 	// ------------------------------------------------------------------
 	function typing(target: EventTarget | null): boolean {
 		const el = target as HTMLElement | null;
@@ -615,6 +755,19 @@

 	function onKeydown(e: KeyboardEvent) {
 		if (e.defaultPrevented || pickerFor || inLayer(e.target)) return;
+		if (e.key === 'Escape' && bayOpen) {
+			e.preventDefault();
+			closeBay();
+			return;
+		}
+		// 挑选台开着时，键盘归挑选台（其容器自己处理 ↑↓/Enter/Esc）。
+		if (bayOpen) {
+			if (e.key === '/' && !typing(e.target)) {
+				e.preventDefault();
+				bay?.focusSearch();
+			}
+			return;
+		}
 		if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
 			e.preventDefault();
 			void submit();
@@ -652,6 +805,14 @@
 			inspOpen = false;
 		}
 	}
+
+	// ------------------------------------------------------------------
+	// Band (选定后的摘要带) helpers
+	// ------------------------------------------------------------------
+	const currentMeta = $derived(allMetas.find((m) => m.id === workflowId) ?? null);
+	const previewMeta = $derived(allMetas.find((m) => m.id === bayActiveId) ?? null);
+	const previewFull = $derived(bayActiveId != null ? (details.get(bayActiveId) ?? null) : null);
+	const picking = $derived(bayOpen && wide);
 </script>

 <svelte:window onkeydown={onKeydown} />
@@ -685,82 +846,131 @@
 {/snippet}

 <AppShell active={kind} title={t('desk.title')}>
-	<div class="desk" class:insp-off={inspOff}>
-		<section class="center" aria-label={t('desk.title')}>
-			<TakeFeed
-				bind:this={feed}
-				jobs={allJobs}
-				{workflowOf}
-				bind:filter
-				selectedId={selectedJob?.id ?? null}
-				{nowMs}
-				{busyId}
-				loading={$jobsQuery.isLoading}
-				{pendingIds}
-				{flashIds}
-				{shakeIds}
-				bind:orderedIds
-				banner={ctxBanner}
-				{inspectorToggle}
-				onSelect={(job) => selectTake(job, 'pointer')}
-				onReuse={reuse}
-				onRetry={retry}
-				onCancel={cancel}
-				onDelete={requestDelete}
+	<div class="studio-desk" class:picking>
+		<TaskModeRail {kind} metas={deskMetas} active={mode} onSelect={(m) => (mode = m)} onPickWorkflow={pickWorkflow} />
+
+		<div class="bay-col">
+			<WorkflowBay
+				bind:this={bay}
+				open={bayOpen}
+				metas={modeMetas}
+				{pendingCount}
+				selectedId={workflowId}
+				bind:activeId={bayActiveId}
+				{endpoints}
+				onPick={pickWorkflow}
+				onClose={closeBay}
 			/>
-			{#if !$workflowsQuery.isLoading && !deskWorkflows.length}
-				<div class="desk-empty" role="note">
-					<Icon name="playground" size={16} />
-					<span>{t('desk.noWorkflows')}</span>
-					<a class="a-btn ghost sm" href="/connections">{t('studio.wfEmptyGo')}</a>
+		</div>
+
+		<section class="main-col">
+			{#if !bayOpen}
+				<div class="bay-band">
+					<button type="button" class="band-hit" onclick={openBay} title={t('desk.bandChange')}>
+						<Icon name="playground" size={14} />
+						<span class="band-mode">{mode === 'all' ? t('desk.modeAll') : usageLabel(mode)}</span>
+						<span class="band-sep" aria-hidden="true">·</span>
+						<span class="band-name">
+							{currentWorkflow?.name ?? currentMeta?.name ?? t('desk.pickWorkflow')}
+						</span>
+						{#if currentMeta?.usage}<span class="a-tag">{usageLabel(currentMeta.usage)}</span>{/if}
+						<InputRequirementBadge io={currentMeta?.media_io} compact />
+						<span class="band-change">
+							<span class="band-change-txt">{t('desk.bandChange')}</span>
+							<Icon name="chevron-right" size={13} />
+						</span>
+					</button>
 				</div>
 			{/if}
-			<Composer
-				{ds}
-				{values}
-				workflows={deskWorkflows}
-				current={currentWorkflow}
-				{endpoints}
-				{endpointId}
-				conn={connState}
-				{errors}
-				{showErrors}
-				{block}
-				{changedCount}
-				{submitting}
-				{sent}
-				bind:slotBusy
-				bind:promptEl
-				onSet={setVal}
-				onPickWorkflow={(wf) => (workflowId = wf.id)}
-				onPickEndpoint={(id) => {
-					endpointTouched = true;
-					endpointId = id;
-				}}
-				onSubmit={submit}
-				onReveal={reveal}
-				onOpenParams={openParams}
-				onFromResults={(nodeId) => (pickerFor = nodeId)}
-			/>
+
+			{#if picking}
+				<WorkflowPreview
+					meta={previewMeta}
+					full={previewFull}
+					currentId={workflowId}
+					{endpoints}
+					onUse={() => pickWorkflow(bayActiveId ?? workflowId ?? 0)}
+					onToggleFav={(fav) => previewMeta && toggleFavorite(previewMeta.id, fav)}
+				/>
+			{/if}
+
+			<div class="desk" class:insp-off={inspOff} class:off={picking}>
+				<section class="center" aria-label={t('desk.title')}>
+					<TakeFeed
+						bind:this={feed}
+						jobs={allJobs}
+						{workflowOf}
+						bind:filter
+						selectedId={selectedJob?.id ?? null}
+						{nowMs}
+						{busyId}
+						loading={$jobsQuery.isLoading}
+						{pendingIds}
+						{flashIds}
+						{shakeIds}
+						bind:orderedIds
+						banner={ctxBanner}
+						{inspectorToggle}
+						onSelect={(job) => selectTake(job, 'pointer')}
+						onReuse={reuse}
+						onRetry={retry}
+						onCancel={cancel}
+						onDelete={requestDelete}
+					/>
+					{#if !$metaQuery.isLoading && !deskMetas.length}
+						<div class="desk-empty" role="note">
+							<Icon name="playground" size={16} />
+							<span>{t('desk.noWorkflows')}</span>
+							<a class="a-btn ghost sm" href="/connections">{t('studio.wfEmptyGo')}</a>
+						</div>
+					{/if}
+					<Composer
+						{ds}
+						{values}
+						current={currentWorkflow}
+						{endpoints}
+						{endpointId}
+						conn={connState}
+						{errors}
+						{showErrors}
+						{block}
+						{changedCount}
+						{submitting}
+						{sent}
+						bind:slotBusy
+						bind:promptEl
+						onSet={setVal}
+						onOpenBay={openBay}
+						onPickEndpoint={(id) => {
+							endpointTouched = true;
+							endpointId = id;
+						}}
+						onSubmit={submit}
+						onReveal={reveal}
+						onOpenParams={openParams}
+						onFromResults={(nodeId) => (pickerFor = nodeId)}
+					/>
+				</section>
+				<Inspector
+					bind:tab
+					job={selectedJob}
+					wf={selectedJob ? workflowOf(selectedJob) : undefined}
+					{nowMs}
+					open={inspOpen}
+					inactive={wide ? inspOff : !inspOpen}
+					canSendToSlot={!!imageSlotTarget || !!imageList}
+					{crossfade}
+					{playSignal}
+					bind:videoEl
+					params={paramsTab}
+					onClose={closeInspector}
+					onReuse={reuse}
+					onRetry={retry}
+					onSendToSlot={sendToSlot}
+					onDelete={requestDelete}
+				/>
+			</div>
 		</section>
-		<Inspector
-			bind:tab
-			job={selectedJob}
-			wf={selectedJob ? workflowOf(selectedJob) : undefined}
-			{nowMs}
-			open={inspOpen}
-			inactive={wide ? inspOff : !inspOpen}
-			canSendToSlot={!!imageSlotTarget || !!imageList}
-			{crossfade}
-			{playSignal}
-			bind:videoEl
-			params={paramsTab}
-			onClose={closeInspector}
-			onReuse={reuse}
-			onRetry={retry}
-			onSendToSlot={sendToSlot}
-			onDelete={requestDelete}
-		/>
 	</div>
 </AppShell>

@@ -779,17 +989,48 @@
 </Modal>

 <style>
+	.studio-desk {
+		display: grid;
+		grid-template-columns: 204px 0px minmax(0, 1fr);
+		grid-template-rows: minmax(0, 1fr);
+		height: 100%;
+		min-height: 0;
+		transition: grid-template-columns var(--d-drawer) var(--ease-drawer);
+	}
+	.studio-desk.picking {
+		grid-template-columns: 204px clamp(340px, 28vw, 440px) minmax(0, 1fr);
+	}
+	:global(:root[data-reduce='1']) .studio-desk {
+		transition: none;
+	}
+	.bay-col {
+		min-width: 0;
+		min-height: 0;
+		overflow: hidden;
+		border-right: 1px solid var(--line);
+	}
+	.main-col {
+		position: relative;
+		display: flex;
+		flex-direction: column;
+		min-width: 0;
+		min-height: 0;
+	}
 	.desk {
 		display: grid;
 		grid-template-columns: minmax(0, 1fr) 420px;
 		grid-template-rows: minmax(0, 1fr);
 		height: 100%;
 		min-height: 0;
+		flex: 1;
 		transition: grid-template-columns var(--d-drawer) var(--ease-drawer);
 	}
 	.desk.insp-off {
 		grid-template-columns: minmax(0, 1fr) 0px;
 	}
+	.desk.off {
+		display: none;
+	}
 	.center {
 		display: flex;
 		flex-direction: column;
@@ -808,6 +1049,65 @@
 		color: var(--warn);
 		font-size: var(--fs-aux);
 	}
+	/* 摘要带（选定后）：整条可点，展开挑选台。 */
+	.bay-band {
+		flex-shrink: 0;
+		padding: var(--sp-2) var(--sp-7);
+	}
+	.band-hit {
+		display: flex;
+		align-items: center;
+		gap: var(--sp-2);
+		width: 100%;
+		box-sizing: border-box;
+		min-width: 0;
+		padding: var(--sp-2) var(--sp-4);
+		border: 1px solid var(--line);
+		border-radius: var(--r-md);
+		background: var(--bg-2);
+		color: var(--text-2);
+		font: inherit;
+		font-size: var(--fs-aux);
+		text-align: left;
+		cursor: pointer;
+		transition:
+			border-color var(--d-state) ease,
+			color var(--d-state) ease;
+	}
+	.band-hit:hover {
+		border-color: var(--line-2);
+		color: var(--text);
+	}
+	.band-hit:focus-visible {
+		outline: none;
+		border-color: var(--accent-line);
+	}
+	.band-mode {
+		flex-shrink: 0;
+		color: var(--text-3);
+	}
+	.band-sep {
+		color: var(--text-3);
+	}
+	.band-name {
+		min-width: 0;
+		overflow: hidden;
+		text-overflow: ellipsis;
+		white-space: nowrap;
+		color: var(--text);
+		font-weight: 500;
+	}
+	.band-change {
+		display: inline-flex;
+		align-items: center;
+		gap: 2px;
+		margin-left: auto;
+		flex-shrink: 0;
+		color: var(--text-3);
+	}
+	.band-change-txt {
+		font-size: var(--fs-mini);
+	}
 	.picker-grid {
 		display: grid;
 		grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
@@ -838,7 +1138,12 @@
 		color: var(--text-3);
 		font-size: var(--fs-aux);
 	}
+	/* 中屏：挑选台为全屏浮层（组件内处理），列宽归零。 */
 	@media (max-width: 1179px) {
+		.studio-desk,
+		.studio-desk.picking {
+			grid-template-columns: 204px 0px minmax(0, 1fr);
+		}
 		.desk,
 		.desk.insp-off {
 			grid-template-columns: minmax(0, 1fr);
@@ -846,10 +1151,33 @@
 		.desk-empty {
 			margin: 0 var(--sp-6) var(--sp-3);
 		}
+		.bay-band {
+			padding: var(--sp-2) var(--sp-6);
+		}
 	}
+	/* 窄屏：任务模式变横条，摘要带仍可用。 */
 	@media (max-width: 760px) {
+		.studio-desk,
+		.studio-desk.picking {
+			grid-template-columns: minmax(0, 1fr) 0px;
+			grid-template-rows: auto minmax(0, 1fr);
+		}
+		.bay-col {
+			grid-column: 2;
+			grid-row: 1 / span 2;
+		}
+		.main-col {
+			grid-column: 1;
+			grid-row: 2;
+		}
 		.desk-empty {
 			margin: 0 var(--sp-5) var(--sp-2);
 		}
+		.bay-band {
+			padding: var(--sp-1) var(--sp-4) var(--sp-2);
+		}
+		.band-change-txt {
+			display: none;
+		}
 	}
 </style>
@@ -0,0 +1,310 @@
+<script lang="ts">
+	import Icon from '$lib/components/ui/Icon.svelte';
+	import { USAGE_BY_KIND, type WorkflowMeta, type WorkflowUsage } from '$lib/comfy/types';
+	import { t } from '$lib/i18n.svelte';
+	import { usageLabel } from '$lib/components/generate/schema';
+
+	/**
+	 * 左栏任务模式 (HEL-683)：该入口可用的任务模式（按真实工作流统计），
+	 * 未覆盖的模式置灰；底部为收藏与最近使用。窄屏退化为横向模式条。
+	 */
+	interface Props {
+		kind: 'image' | 'video';
+		metas: WorkflowMeta[];
+		active: WorkflowUsage | 'all';
+		onSelect: (mode: WorkflowUsage | 'all') => void;
+		onPickWorkflow: (id: number) => void;
+	}
+
+	let { kind, metas, active, onSelect, onPickWorkflow }: Props = $props();
+
+	interface ModeEntry {
+		usage: WorkflowUsage;
+		count: number;
+	}
+	const modes = $derived.by(() => {
+		const counts = new Map<WorkflowUsage, number>();
+		for (const m of metas) {
+			if (!m.usage) continue;
+			counts.set(m.usage, (counts.get(m.usage) ?? 0) + 1);
+		}
+		return USAGE_BY_KIND[kind].map((u) => ({ usage: u, count: counts.get(u) ?? 0 }));
+	});
+
+	const favorites = $derived(
+		metas
+			.filter((m) => m.favorite)
+			.sort((a, b) => (b.last_used_at ?? '').localeCompare(a.last_used_at ?? ''))
+			.slice(0, 5),
+	);
+	const recents = $derived(
+		metas
+			.filter((m) => m.last_used_at && !m.favorite)
+			.sort((a, b) => (b.last_used_at ?? '').localeCompare(a.last_used_at ?? ''))
+			.slice(0, 5),
+	);
+</script>
+
+<nav class="rail" aria-label={t('desk.modeRailAria')}>
+	<p class="rail-label">{t('desk.modeRailTitle')}</p>
+	<div class="modes" role="group" aria-label={t('desk.modeRailTitle')}>
+		<button
+			type="button"
+			class="mode"
+			class:on={active === 'all'}
+			aria-pressed={active === 'all'}
+			onclick={() => onSelect('all')}
+		>
+			<span class="mode-lbl">{t('desk.modeAll')}</span>
+			<span class="mode-n">{metas.length}</span>
+		</button>
+		{#each modes as m (m.usage)}
+			<button
+				type="button"
+				class="mode"
+				class:on={active === m.usage}
+				class:off={m.count === 0}
+				disabled={m.count === 0}
+				aria-pressed={active === m.usage}
+				title={m.count === 0 ? t('desk.modeEmpty') : usageLabel(m.usage)}
+				onclick={() => onSelect(m.usage)}
+			>
+				<span class="mode-lbl">{usageLabel(m.usage)}</span>
+				<span class="mode-n">{m.count}</span>
+			</button>
+		{/each}
+	</div>
+
+	<div class="lists">
+		{#if recents.length}
+			<section class="rail-sec">
+				<p class="rail-label">
+					<Icon name="clock" size={12} />
+					{t('desk.railRecent')}
+				</p>
+				<ul class="pick-list">
+					{#each recents as m (m.id)}
+						<li>
+							<button type="button" class="pick" title={m.name} onclick={() => onPickWorkflow(m.id)}>
+								<span class="pick-name">{m.name}</span>
+							</button>
+						</li>
+					{/each}
+				</ul>
+			</section>
+		{/if}
+		{#if favorites.length}
+			<section class="rail-sec">
+				<p class="rail-label">
+					<Icon name="star" size={12} />
+					{t('desk.railFav')}
+				</p>
+				<ul class="pick-list">
+					{#each favorites as m (m.id)}
+						<li>
+							<button type="button" class="pick" title={m.name} onclick={() => onPickWorkflow(m.id)}>
+								<span class="pick-name">{m.name}</span>
+							</button>
+						</li>
+					{/each}
+				</ul>
+			</section>
+		{/if}
+	</div>
+</nav>
+
+<style>
+	.rail {
+		display: flex;
+		flex-direction: column;
+		min-height: 0;
+		box-sizing: border-box;
+		padding: var(--sp-5) var(--sp-3);
+		border-right: 1px solid var(--line);
+		overflow-y: auto;
+	}
+	.rail-label {
+		display: flex;
+		align-items: center;
+		gap: var(--sp-1);
+		margin: 0 0 var(--sp-2);
+		padding: 0 var(--sp-3);
+		color: var(--text-3);
+		font-size: var(--fs-mini);
+		letter-spacing: 0.05em;
+		white-space: nowrap;
+	}
+	.modes {
+		display: flex;
+		flex-direction: column;
+		gap: 2px;
+	}
+	.mode {
+		display: flex;
+		align-items: center;
+		justify-content: space-between;
+		gap: var(--sp-2);
+		box-sizing: border-box;
+		width: 100%;
+		padding: var(--sp-3) var(--sp-4);
+		border: 0;
+		border-radius: var(--r-md);
+		background: none;
+		color: var(--text-2);
+		font: inherit;
+		font-size: var(--fs-body);
+		text-align: left;
+		cursor: pointer;
+		transition:
+			color var(--d-state) ease,
+			background-color var(--d-state) ease;
+	}
+	.mode:hover:not(:disabled) {
+		background: var(--bg-3);
+		color: var(--text);
+	}
+	.mode:focus-visible {
+		outline: none;
+		box-shadow: 0 0 0 1px var(--accent-line);
+	}
+	.mode.on {
+		background: var(--bg-3);
+		color: var(--text);
+	}
+	/* 取景框角线只标当前模式（HEL-680 内容级选中语言）。 */
+	.mode.on {
+		position: relative;
+	}
+	.mode.on::after {
+		content: '';
+		position: absolute;
+		inset: 2px;
+		pointer-events: none;
+		background-image:
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0),
+			linear-gradient(var(--accent) 0 0);
+		background-position:
+			left top,
+			left top,
+			right top,
+			right top,
+			left bottom,
+			left bottom,
+			right bottom,
+			right bottom;
+		background-size:
+			var(--frame-arm, 12px) var(--frame-w, 2px),
+			var(--frame-w, 2px) var(--frame-arm, 12px),
+			var(--frame-arm, 12px) var(--frame-w, 2px),
+			var(--frame-w, 2px) var(--frame-arm, 12px),
+			var(--frame-arm, 12px) var(--frame-w, 2px),
+			var(--frame-w, 2px) var(--frame-arm, 12px),
+			var(--frame-arm, 12px) var(--frame-w, 2px),
+			var(--frame-w, 2px) var(--frame-arm, 12px);
+		background-repeat: no-repeat;
+	}
+	.mode.off {
+		color: var(--text-3);
+		opacity: 0.55;
+		cursor: not-allowed;
+	}
+	.mode-n {
+		color: var(--text-3);
+		font-size: var(--fs-mini);
+		font-variant-numeric: tabular-nums;
+	}
+	.lists {
+		display: flex;
+		flex-direction: column;
+		gap: var(--sp-4);
+		margin-top: var(--sp-5);
+		padding-top: var(--sp-4);
+		border-top: 1px solid var(--line);
+	}
+	.rail-sec {
+		min-width: 0;
+	}
+	.pick-list {
+		display: flex;
+		flex-direction: column;
+		gap: 1px;
+		margin: 0;
+		padding: 0;
+		list-style: none;
+	}
+	.pick {
+		display: block;
+		width: 100%;
+		box-sizing: border-box;
+		padding: var(--sp-2) var(--sp-4);
+		border: 0;
+		border-radius: var(--r-sm);
+		background: none;
+		color: var(--text-2);
+		font: inherit;
+		font-size: var(--fs-aux);
+		text-align: left;
+		cursor: pointer;
+		transition:
+			color var(--d-state) ease,
+			background-color var(--d-state) ease;
+	}
+	.pick:hover {
+		background: var(--bg-3);
+		color: var(--text);
+	}
+	.pick:focus-visible {
+		outline: none;
+		box-shadow: 0 0 0 1px var(--accent-line);
+	}
+	.pick-name {
+		display: block;
+		overflow: hidden;
+		text-overflow: ellipsis;
+		white-space: nowrap;
+	}
+
+	/* 窄屏：任务模式退化为横向条，收藏/最近隐藏（挑选台里有同样入口）。 */
+	@media (max-width: 760px) {
+		.rail {
+			flex-direction: row;
+			align-items: center;
+			gap: var(--sp-2);
+			padding: var(--sp-2) var(--sp-4);
+			border-right: 0;
+			border-bottom: 1px solid var(--line);
+			overflow-x: auto;
+			overflow-y: hidden;
+			overscroll-behavior-x: contain;
+		}
+		.rail-label {
+			margin: 0;
+			padding: 0;
+			flex-shrink: 0;
+		}
+		.modes {
+			flex-direction: row;
+			gap: var(--sp-1);
+		}
+		.mode {
+			width: auto;
+			gap: var(--sp-2);
+			padding: var(--sp-2) var(--sp-3);
+			border: 1px solid var(--line);
+			font-size: var(--fs-aux);
+			white-space: nowrap;
+		}
+		.mode.on::after {
+			inset: 1px;
+		}
+		.lists {
+			display: none;
+		}
+	}
+</style>
@@ -0,0 +1,488 @@
+<script lang="ts">
+	import Icon from '$lib/components/ui/Icon.svelte';
+	import { tick } from 'svelte';
+	import type { WorkflowMeta } from '$lib/comfy/types';
+	import { t } from '$lib/i18n.svelte';
+	import { usageLabel } from '$lib/components/generate/schema';
+	import LibraryFilters from './LibraryFilters.svelte';
+	import LibraryRow from './LibraryRow.svelte';
+
+	/**
+	 * 工作流挑选台 (HEL-683, HEL-674 §二)：中部可搜索筛选、按模型家族
+	 * 分组的挑选列。数据来自 S2 轻量元数据（view=meta，不含完整 JSON）；
+	 * 云端来源只做诚实占位（未接入，不可点击使用）。键盘：↑↓/J/K 游走、
+	 * Enter 使用、Esc 关闭。长列表增量渲染 + content-visibility。
+	 */
+	interface Props {
+		open: boolean;
+		metas: WorkflowMeta[];
+		pendingCount: number;
+		selectedId: number | null;
+		activeId: number | null;
+		endpoints: Array<{ id: string; name: string }>;
+		onPick: (id: number) => void;
+		onClose: () => void;
+	}
+
+	let { open, metas, pendingCount, selectedId, activeId = $bindable(null), endpoints, onPick, onClose }: Props =
+		$props();
+
+	let search = $state('');
+	let source = $state<'local' | 'cloud'>('local');
+	let favOnly = $state(false);
+	let visibleCount = $state(48);
+	let searchEl = $state<HTMLInputElement | null>(null);
+	let listEl = $state<HTMLElement | null>(null);
+
+	const CATEGORY_LABELS: Record<string, string> = {
+		basic: 'wfCat.basic',
+		audio_tts: 'wfCat.audioTts',
+		music: 'wfCat.music',
+		image: 'wfCat.image',
+		video: 'wfCat.video',
+		digital_human: 'wfCat.digitalHuman',
+		motion_transfer: 'wfCat.motionTransfer',
+	};
+	function categoryLabel(key: string | null | undefined): string {
+		if (!key) return '';
+		const k = CATEGORY_LABELS[key];
+		return k ? t(k) : key;
+	}
+
+	const filtered = $derived.by(() => {
+		const q = search.trim().toLowerCase();
+		return metas.filter((m) => {
+			if (favOnly && !m.favorite) return false;
+			if (!q) return true;
+			const hay = [
+				m.name,
+				m.description ?? '',
+				(m.tags ?? []).join(' '),
+				m.model_family ?? '',
+				m.usage ? usageLabel(m.usage) : '',
+				categoryLabel(m.category),
+			]
+				.join(' ')
+				.toLowerCase();
+			return hay.includes(q);
+		});
+	});
+
+	interface Group {
+		key: string;
+		label: string;
+		rows: WorkflowMeta[];
+	}
+	const groups = $derived.by(() => {
+		const byFamily = new Map<string, WorkflowMeta[]>();
+		for (const m of filtered) {
+			const key = m.model_family ?? '';
+			const list = byFamily.get(key) ?? [];
+			list.push(m);
+			byFamily.set(key, list);
+		}
+		const out: Group[] = [];
+		for (const [key, rows] of byFamily) {
+			rows.sort((a, b) => {
+				if (a.favorite !== b.favorite) return a.favorite ? -1 : 1;
+				const la = a.last_used_at ?? '';
+				const lb = b.last_used_at ?? '';
+				if (la !== lb) return lb.localeCompare(la);
+				return a.name.localeCompare(b.name, 'zh');
+			});
+			out.push({ key, label: key || t('desk.bayNoFamily'), rows });
+		}
+		out.sort((a, b) =>
+			a.key === '' ? 1 : b.key === '' ? -1 : a.label.localeCompare(b.label, 'zh'),
+		);
+		return out;
+	});
+
+	const flat = $derived(groups.flatMap((g) => g.rows));
+
+	/** Flattened rows cut at the incremental window, per group. */
+	const windowed = $derived.by(() => {
+		let left = visibleCount;
+		return groups.map((g) => {
+			const take = Math.max(0, Math.min(g.rows.length, left));
+			left -= take;
+			return { ...g, visible: g.rows.slice(0, take) };
+		});
+	});
+
+	// Any filter change restarts the incremental window.
+	$effect(() => {
+		void search;
+		void favOnly;
+		visibleCount = 48;
+		listEl?.scrollTo({ top: 0 });
+	});
+
+	// Keep the active row real: follow the selection, clamp on filter changes.
+	$effect(() => {
+		void flat;
+		if (activeId != null && flat.some((m) => m.id === activeId)) return;
+		activeId = flat.find((m) => m.id === selectedId)?.id ?? flat[0]?.id ?? null;
+	});
+
+	// Opening the bay: the selected workflow's row must be inside the
+	// incremental window and in view — otherwise the highlight is invisible.
+	$effect(() => {
+		if (!open) return;
+		const target = activeId ?? selectedId;
+		const idx = flat.findIndex((m) => m.id === target);
+		if (idx < 0) return;
+		if (idx >= visibleCount) visibleCount = idx + 48;
+		const id = setTimeout(() => {
+			document
+				.querySelector<HTMLElement>(`[data-wf-row="${target}"]`)
+				?.scrollIntoView({ block: 'center' });
+		}, 0);
+		return () => clearTimeout(id);
+	});
+
+	const activeMeta = $derived(metas.find((m) => m.id === activeId) ?? null);
+	const resultHint = $derived(
+		source === 'cloud' ? '' : t('desk.bayCount', { n: filtered.length, total: metas.length }),
+	);
+
+	// Autofocus the search whenever the bay opens.
+	$effect(() => {
+		if (!open) return;
+		const id = setTimeout(() => searchEl?.focus(), 0);
+		return () => clearTimeout(id);
+	});
+
+	function moveActive(delta: number) {
+		if (!flat.length) return;
+		let i = flat.findIndex((m) => m.id === activeId);
+		i = i < 0 ? (delta > 0 ? 0 : flat.length - 1) : i + delta;
+		i = Math.max(0, Math.min(flat.length - 1, i));
+		const next = flat[i];
+		activeId = next.id;
+		// Keyboard roving may step past the incremental window — extend it so
+		// the row exists, then reveal it.
+		if (i >= visibleCount) visibleCount = i + 24;
+		void tick().then(() => {
+			document
+				.querySelector<HTMLElement>(`[data-wf-row="${next.id}"]`)
+				?.scrollIntoView({ block: 'nearest' });
+		});
+	}
+
+	function pickActive() {
+		if (activeMeta) onPick(activeMeta.id);
+	}
+
+	export function focusSearch() {
+		searchEl?.focus();
+	}
+
+	function onKeydown(e: KeyboardEvent) {
+		if (e.defaultPrevented) return;
+		if (e.key === 'Escape') {
+			e.preventDefault();
+			onClose();
+			return;
+		}
+		const inSearch = e.target === searchEl;
+		if (e.key === 'ArrowDown' || (!inSearch && e.key === 'j')) {
+			e.preventDefault();
+			moveActive(1);
+		} else if (e.key === 'ArrowUp' || (!inSearch && e.key === 'k')) {
+			e.preventDefault();
+			moveActive(-1);
+		} else if (e.key === 'Enter' && !e.ctrlKey && !e.metaKey) {
+			e.preventDefault();
+			pickActive();
+		}
+	}
+
+	function onScroll() {
+		const el = listEl;
+		if (!el) return;
+		if (el.scrollTop + el.clientHeight >= el.scrollHeight - 240) {
+			if (visibleCount < flat.length) visibleCount += 48;
+		}
+	}
+</script>
+
+{#if open}
+	<!-- svelte-ignore a11y_no_static_element_interactions -->
+	<div class="bay-backdrop" onclick={onClose} aria-hidden="true"></div>
+{/if}
+<!-- svelte-ignore a11y_no_noninteractive_element_interactions -->
+<section
+	class="bay"
+	class:open
+	aria-label={t('desk.pickWorkflow')}
+	inert={!open}
+	onkeydown={onKeydown}
+>
+	<header class="bay-head">
+		<h2 class="bay-title">
+			<Icon name="playground" size={15} />
+			<span>{t('desk.pickWorkflow')}</span>
+		</h2>
+		<button type="button" class="a-btn ghost sm close" onclick={onClose} title={t('desk.keyClose')}>
+			<Icon name="close" size={14} />
+			<span class="lbl">{t('desk.keyClose')}</span>
+		</button>
+	</header>
+
+	<div class="bay-filters">
+		<LibraryFilters
+			bind:searchEl
+			{search}
+			{source}
+			{favOnly}
+			{resultHint}
+			onSetSearch={(v) => (search = v)}
+			onSetSource={(s) => (source = s)}
+			onToggleFav={() => (favOnly = !favOnly)}
+		/>
+	</div>
+
+	{#if source === 'cloud'}
+		<div class="cloud-note" role="note">
+			<Icon name="alert" size={16} />
+			<p class="cloud-title">{t('desk.bayCloudTitle')}</p>
+			<p class="cloud-body">{t('desk.bayCloudBody')}</p>
+		</div>
+	{:else if !metas.length}
+		<div class="bay-empty">
+			<p>{t('desk.noWorkflows')}</p>
+			<a class="a-btn ghost sm" href="/connections">{t('studio.wfEmptyGo')}</a>
+		</div>
+	{:else}
+		<!-- svelte-ignore a11y_no_static_element_interactions -->
+		<div class="bay-list" bind:this={listEl} role="listbox" aria-label={t('desk.pickWorkflow')} onscroll={onScroll}>
+			{#each windowed as g (g.key)}
+				{#if g.visible.length}
+					<div class="group-label" aria-hidden="true">{g.label} · {g.rows.length}</div>
+					{#each g.visible as m (m.id)}
+						<div data-wf-row={m.id}>
+							<LibraryRow
+								meta={m}
+								current={m.id === selectedId}
+								active={m.id === activeId}
+								{endpoints}
+								onPick={() => onPick(m.id)}
+								onActive={() => (activeId = m.id)}
+							/>
+						</div>
+					{/each}
+				{/if}
+			{:else}
+				<p class="bay-none">{t('desk.wfNoMatch')}</p>
+			{/each}
+			{#if visibleCount < flat.length}
+				<button type="button" class="more a-btn ghost sm" onclick={() => (visibleCount += 48)}>
+					{t('desk.bayMore', { n: Math.min(48, flat.length - visibleCount) })}
+				</button>
+			{/if}
+		</div>
+		<footer class="bay-foot">
+			{#if pendingCount > 0}
+				<a class="pending-link" href="/connections">
+					{t('desk.bayPending', { n: pendingCount })}
+					<Icon name="chevron-right" size={12} />
+				</a>
+			{/if}
+			{#if activeMeta}
+				<span class="active-name" title={activeMeta.name}>{activeMeta.name}</span>
+			{/if}
+			<span class="keys">
+				<span class="a-kbd">↑↓</span>{t('desk.keySelect')}
+				<span class="a-kbd">Enter</span>{t('desk.keyUse')}
+				<span class="a-kbd">Esc</span>{t('desk.keyClose')}
+			</span>
+		</footer>
+	{/if}
+</section>
+
+<style>
+	.bay {
+		display: flex;
+		flex-direction: column;
+		height: 100%;
+		min-height: 0;
+		min-width: 0;
+		box-sizing: border-box;
+		padding: var(--sp-5) var(--sp-4) var(--sp-3);
+		overflow: hidden;
+	}
+	.bay-head {
+		display: flex;
+		align-items: center;
+		gap: var(--sp-2);
+		padding: 0 var(--sp-2) var(--sp-4);
+	}
+	.bay-title {
+		display: flex;
+		align-items: center;
+		gap: var(--sp-2);
+		margin: 0;
+		color: var(--text);
+		font-size: var(--fs-title);
+		font-weight: 600;
+	}
+	.bay-title :global(svg) {
+		color: var(--text-3);
+	}
+	.close {
+		margin-left: auto;
+	}
+	.close .lbl {
+		display: none;
+	}
+	.bay-filters {
+		padding: 0 var(--sp-1) var(--sp-3);
+	}
+	.bay-list {
+		flex: 1;
+		min-height: 0;
+		overflow-y: auto;
+		overscroll-behavior: contain;
+		display: flex;
+		flex-direction: column;
+		gap: 2px;
+		padding: var(--sp-1);
+	}
+	.group-label {
+		position: sticky;
+		top: 0;
+		z-index: 2;
+		padding: var(--sp-3) var(--sp-3) var(--sp-1);
+		background: linear-gradient(var(--bg-2) 82%, transparent);
+		color: var(--text-3);
+		font-size: var(--fs-mini);
+		letter-spacing: 0.04em;
+	}
+	.more {
+		align-self: center;
+		margin: var(--sp-3) 0;
+	}
+	.bay-none,
+	.bay-empty {
+		margin: 0;
+		padding: var(--sp-6) var(--sp-4);
+		color: var(--text-3);
+		font-size: var(--fs-aux);
+		text-align: center;
+	}
+	.bay-empty {
+		display: grid;
+		justify-content: center;
+		gap: var(--sp-3);
+	}
+	.bay-foot {
+		display: flex;
+		align-items: center;
+		gap: var(--sp-3);
+		padding: var(--sp-3) var(--sp-2) 0;
+		border-top: 1px solid var(--line);
+		font-size: var(--fs-mini);
+		color: var(--text-3);
+	}
+	.pending-link {
+		display: inline-flex;
+		align-items: center;
+		gap: 2px;
+		color: var(--text-2);
+		text-decoration: none;
+		white-space: nowrap;
+	}
+	.pending-link:hover {
+		color: var(--text);
+	}
+	.active-name {
+		overflow: hidden;
+		text-overflow: ellipsis;
+		white-space: nowrap;
+		color: var(--text-2);
+	}
+	.keys {
+		display: inline-flex;
+		align-items: center;
+		gap: var(--sp-1);
+		margin-left: auto;
+		white-space: nowrap;
+	}
+	.keys .a-kbd:not(:first-child) {
+		margin-left: var(--sp-2);
+	}
+	.cloud-note {
+		display: grid;
+		justify-items: start;
+		gap: var(--sp-3);
+		margin: var(--sp-4) var(--sp-2);
+		padding: var(--sp-6);
+		border: 1px dashed var(--line-2);
+		border-radius: var(--r-lg);
+		color: var(--text-2);
+	}
+	.cloud-title {
+		margin: 0;
+		color: var(--text);
+		font-weight: 600;
+	}
+	.cloud-body {
+		margin: 0;
+		font-size: var(--fs-aux);
+		line-height: 1.6;
+	}
+
+	/* 窄/中屏：挑选台改为全屏浮层（计划中的最简可用降级）。 */
+	.bay-backdrop {
+		display: none;
+	}
+	@media (max-width: 1179px) {
+		.bay {
+			position: fixed;
+			left: 0;
+			right: 0;
+			top: var(--topbar-h);
+			bottom: 0;
+			z-index: 60;
+			background: var(--bg);
+			box-shadow: var(--shadow-float);
+			transform: translateY(12px);
+			opacity: 0;
+			pointer-events: none;
+			transition:
+				transform var(--d-drawer) var(--ease-drawer),
+				opacity var(--d-state) ease;
+		}
+		.bay.open {
+			transform: none;
+			opacity: 1;
+			pointer-events: auto;
+		}
+		.bay-backdrop {
+			display: block;
+			position: fixed;
+			inset: var(--topbar-h) 0 0 0;
+			z-index: 59;
+			background: var(--overlay);
+		}
+		.close .lbl {
+			display: inline;
+		}
+		.keys {
+			display: none;
+		}
+		:global(:root[data-reduce='1']) .bay {
+			transition: none;
+		}
+	}
+	@media (max-width: 760px) {
+		.bay {
+			top: 0;
+			padding: var(--sp-4) var(--sp-4) calc(var(--tabbar-h) + env(safe-area-inset-bottom));
+		}
+		.bay-backdrop {
+			inset: 0;
+		}
+	}
+</style>
@@ -0,0 +1,247 @@
+<script lang="ts">
+	import Icon from '$lib/components/ui/Icon.svelte';
+	import type { Workflow, WorkflowMeta } from '$lib/comfy/types';
+	import { t } from '$lib/i18n.svelte';
+	import { usageLabel, slotSummary } from '$lib/components/generate/schema';
+	import InputRequirementBadge from './InputRequirementBadge.svelte';
+
+	/**
+	 * 输入要求预览 (HEL-683)：挑选台打开时右侧的详情面板——展示键盘/指针
+	 * 停留的工作流的名称、家族、说明与真实输入要求（S2 元数据 + 已加载的
+	 * 完整记录槽位摘要），确认后进入创作区。
+	 */
+	interface Props {
+		meta: WorkflowMeta | null;
+		full: Workflow | null;
+		currentId: number | null;
+		endpoints: Array<{ id: string; name: string }>;
+		onUse: () => void;
+		onToggleFav: (fav: boolean) => void;
+	}
+
+	let { meta, full, currentId, endpoints, onUse, onToggleFav }: Props = $props();
+
+	const isCurrent = $derived(meta != null && meta.id === currentId);
+	const broken = $derived((full?.warnings ?? []).some((w) => w.level === 'error'));
+	const endpointName = $derived.by(() => {
+		const id = meta?.endpoint_id;
+		if (!id) return t('desk.wfDefaultConn');
+		return endpoints.find((e) => e.id === id)?.name ?? t('desk.wfDefaultConn');
+	});
+	const CATEGORY_LABELS: Record<string, string> = {
+		basic: 'wfCat.basic',
+		audio_tts: 'wfCat.audioTts',
+		music: 'wfCat.music',
+		image: 'wfCat.image',
+		video: 'wfCat.video',
+		digital_human: 'wfCat.digitalHuman',
+		motion_transfer: 'wfCat.motionTransfer',
+	};
+</script>
+
+<div class="preview">
+	{#if meta}
+		<div class="head">
+			<h3 class="name" title={meta.name}>{meta.name}</h3>
+			<button
+				type="button"
+				class="fav"
+				class:on={meta.favorite}
+				aria-pressed={meta.favorite}
+				aria-label={t('desk.bayFavOnly')}
+				title={meta.favorite ? t('desk.pvUnfav') : t('desk.pvFav')}
+				onclick={() => onToggleFav(!meta.favorite)}
+			>
+				<Icon name="star" size={16} />
+			</button>
+		</div>
+		<div class="tags">
+			{#if meta.usage}<span class="a-tag accent">{usageLabel(meta.usage)}</span>{/if}
+			{#if meta.model_family}<span class="a-tag">{meta.model_family}</span>{/if}
+			{#if meta.category && CATEGORY_LABELS[meta.category]}
+				<span class="a-tag">{t(CATEGORY_LABELS[meta.category])}</span>
+			{/if}
+			{#if isCurrent}<span class="a-tag ok">{t('desk.pvCurrent')}</span>{/if}
+			{#if broken}<span class="a-tag err">{t('desk.wfBroken')}</span>{/if}
+		</div>
+
+		{#if meta.description}
+			<p class="desc">{meta.description}</p>
+		{/if}
+
+		<section class="sec">
+			<h4 class="sec-title">{t('desk.bayReqTitle')}</h4>
+			<div class="req-line">
+				<InputRequirementBadge io={meta.media_io} />
+			</div>
+			{#if full}
+				<p class="slot-summary">{slotSummary(full)}</p>
+			{:else}
+				<p class="slot-summary dim">{t('desk.pvSlotsLoading')}</p>
+			{/if}
+		</section>
+
+		<dl class="kv">
+			<div class="kv-row">
+				<dt>{t('studio.connLabel')}</dt>
+				<dd>{endpointName}</dd>
+			</div>
+			{#if meta.last_used_at}
+				<div class="kv-row">
+					<dt>{t('desk.pvLastUsed')}</dt>
+					<dd>{new Date(meta.last_used_at).toLocaleString()}</dd>
+				</div>
+			{/if}
+			{#if (full?.input_schema ?? []).length}
+				<div class="kv-row">
+					<dt>{t('desk.pvParamCount')}</dt>
+					<dd>{(full?.input_schema ?? []).length}</dd>
+				</div>
+			{/if}
+		</dl>
+
+		<div class="use">
+			<button type="button" class="a-btn primary" disabled={broken} onclick={onUse}>
+				<Icon name="check" size={13} />
+				{isCurrent ? t('desk.pvBackCreate') : t('desk.pvUse')}
+			</button>
+			{#if broken}<p class="use-hint">{t('studio.errWfBroken')}</p>{/if}
+		</div>
+	{:else}
+		<div class="preview-empty">
+			<Icon name="search" size={20} />
+			<p>{t('desk.pvEmpty')}</p>
+		</div>
+	{/if}
+</div>
+
+<style>
+	.preview {
+		display: flex;
+		flex-direction: column;
+		gap: var(--sp-4);
+		flex: 1;
+		min-height: 0;
+		box-sizing: border-box;
+		height: 100%;
+		padding: var(--sp-7);
+		overflow-y: auto;
+	}
+	.head {
+		display: flex;
+		align-items: flex-start;
+		gap: var(--sp-3);
+	}
+	.name {
+		flex: 1;
+		min-width: 0;
+		margin: 0;
+		color: var(--text);
+		font-size: var(--fs-title);
+		font-weight: 600;
+		line-height: 1.4;
+		overflow-wrap: anywhere;
+	}
+	.fav {
+		flex-shrink: 0;
+		display: grid;
+		place-items: center;
+		width: 32px;
+		height: 32px;
+		border: 1px solid var(--line);
+		border-radius: var(--r-md);
+		background: none;
+		color: var(--text-3);
+		cursor: pointer;
+		transition:
+			color var(--d-state) ease,
+			background-color var(--d-state) ease;
+	}
+	.fav.on {
+		color: var(--accent);
+		background: var(--accent-soft);
+	}
+	.fav:focus-visible {
+		outline: none;
+		box-shadow: 0 0 0 1px var(--accent-line);
+	}
+	.tags {
+		display: flex;
+		flex-wrap: wrap;
+		gap: var(--sp-1);
+	}
+	.desc {
+		margin: 0;
+		color: var(--text-2);
+		font-size: var(--fs-aux);
+		line-height: 1.65;
+		white-space: pre-line;
+	}
+	.sec {
+		display: grid;
+		gap: var(--sp-2);
+		padding: var(--sp-4);
+		border: 1px solid var(--line);
+		border-radius: var(--r-lg);
+		background: var(--bg-2);
+	}
+	.sec-title {
+		margin: 0;
+		color: var(--text-3);
+		font-size: var(--fs-mini);
+		letter-spacing: 0.05em;
+	}
+	.req-line {
+		display: flex;
+	}
+	.slot-summary {
+		margin: 0;
+		color: var(--text-2);
+		font-size: var(--fs-aux);
+	}
+	.slot-summary.dim {
+		color: var(--text-3);
+	}
+	.kv {
+		display: grid;
+		gap: var(--sp-1);
+		margin: 0;
+	}
+	.kv-row {
+		display: flex;
+		gap: var(--sp-3);
+		font-size: var(--fs-aux);
+	}
+	.kv-row dt {
+		flex-shrink: 0;
+		width: 72px;
+		color: var(--text-3);
+	}
+	.kv-row dd {
+		margin: 0;
+		color: var(--text-2);
+		min-width: 0;
+		overflow-wrap: anywhere;
+	}
+	.use {
+		display: flex;
+		flex-direction: column;
+		gap: var(--sp-2);
+		margin-top: auto;
+		padding-top: var(--sp-4);
+	}
+	.use-hint {
+		margin: 0;
+		color: var(--err);
+		font-size: var(--fs-mini);
+	}
+	.preview-empty {
+		display: grid;
+		place-content: center;
+		justify-items: center;
+		gap: var(--sp-3);
+		height: 100%;
+		color: var(--text-3);
+		font-size: var(--fs-aux);
+	}
+</style>
@@ -5,7 +5,6 @@
 	import { t } from '$lib/i18n.svelte';
 	import ParamChip from './ParamChip.svelte';
 	import SlotTray from './SlotTray.svelte';
-	import WorkflowPicker from './WorkflowPicker.svelte';
 	import { chipValue, type BlockReason, type DeskSchema, type FormValue, type FormValues } from './schema';

 	/**
@@ -13,11 +12,12 @@
 	 * row of chips — workflow, connection, common params, 参数 — ending in
 	 * 生成 with its reason line. The whole composer takes dropped files.
 	 * ≤760px it collapses to one line and rises as a bottom sheet on focus.
+	 * HEL-683: the workflow chip no longer opens a dropdown — it expands the
+	 * desk's middle picker bay (StudioDesk WorkflowBay), the single picker.
 	 */
 	interface Props {
 		ds: DeskSchema;
 		values: FormValues;
-		workflows: Workflow[];
 		current: Workflow | null;
 		endpoints: Array<{ id: string; name: string }>;
 		endpointId: string;
@@ -32,7 +32,7 @@
 		slotBusy?: boolean;
 		promptEl?: HTMLTextAreaElement | null;
 		onSet: (nodeId: string, value: FormValue) => void;
-		onPickWorkflow: (wf: Workflow) => void;
+		onOpenBay: () => void;
 		onPickEndpoint: (id: string) => void;
 		onSubmit: () => void;
 		onReveal: () => void;
@@ -43,7 +43,6 @@
 	let {
 		ds,
 		values,
-		workflows,
 		current,
 		endpoints,
 		endpointId,
@@ -57,7 +56,7 @@
 		slotBusy = $bindable(false),
 		promptEl = $bindable(null),
 		onSet,
-		onPickWorkflow,
+		onOpenBay,
 		onPickEndpoint,
 		onSubmit,
 		onReveal,
@@ -165,7 +164,18 @@
 		{/if}

 		<div class="foot">
-			<WorkflowPicker {workflows} {current} {endpoints} onPick={onPickWorkflow} />
+			<div class="picker">
+				<button
+					type="button"
+					id="desk-wf"
+					class="a-chip wf"
+					title={current?.name ?? t('desk.pickWorkflow')}
+					onclick={onOpenBay}
+				>
+					<Icon name="playground" size={14} />
+					<span class="lbl">{current?.name ?? t('desk.pickWorkflow')}</span>
+				</button>
+			</div>
 			<div class="conn opt">
 				<button
 					type="button"
@@ -312,6 +322,10 @@
 		gap: var(--sp-2);
 		padding: var(--sp-2) var(--sp-3) var(--sp-3);
 	}
+	.picker {
+		position: relative;
+		min-width: 0;
+	}
 	.conn {
 		position: relative;
 	}
@@ -1,277 +0,0 @@
-<script lang="ts">
-	import Icon from '$lib/components/ui/Icon.svelte';
-	import ShellPop from '$lib/components/shell/ShellPop.svelte';
-	import { WORKFLOW_USAGES, type Workflow } from '$lib/comfy/types';
-	import { t } from '$lib/i18n.svelte';
-	import { slotSummary, usageLabel } from './schema';
-
-	/**
-	 * 工作流选择 (spec-v2 §3.3 工作流面板): the composer's first chip opens a
-	 * pop grouped by usage with search; each row shows what the workflow
-	 * really takes (slot summary from its JSON), its connection and whether
-	 * it last ran. Picking keeps the prompt and carried-over images.
-	 * D 批 (HEL-654): the footer's「↑↓ 选择」is now literally true — an
-	 * active row follows ↑↓ (and the pointer), Enter uses it, and the
-	 * search's Enter picks the active row instead of always the first.
-	 */
-	interface Props {
-		workflows: Workflow[];
-		current: Workflow | null;
-		endpoints: Array<{ id: string; name: string }>;
-		onPick: (wf: Workflow) => void;
-	}
-
-	let { workflows, current, endpoints, onPick }: Props = $props();
-
-	let open = $state(false);
-	let query = $state('');
-	let activeId = $state<number | null>(null);
-
-	type Status = { tone: '' | 'ok' | 'warn' | 'err'; label: string };
-
-	function statusOf(wf: Workflow): Status {
-		if ((wf.warnings ?? []).some((w) => w.level === 'error')) return { tone: 'err', label: t('desk.wfBroken') };
-		const lt = wf.last_test;
-		if (!lt) return { tone: '', label: t('desk.wfUntested') };
-		if (lt.status === 'done' && lt.output_count > 0) return { tone: 'ok', label: t('desk.wfOk') };
-		if (lt.status === 'failed' || lt.status === 'done') return { tone: 'warn', label: t('desk.wfLastFailed') };
-		return { tone: '', label: t('desk.wfTesting') };
-	}
-
-	function endpointLabel(wf: Workflow): string {
-		const ep = endpoints.find((e) => e.id === wf.endpoint_id);
-		return ep ? ep.name : t('desk.wfDefaultConn');
-	}
-
-	const rows = $derived(
-		workflows.map((wf) => ({
-			wf,
-			summary: slotSummary(wf),
-			conn: endpointLabel(wf),
-			status: statusOf(wf),
-			usage: wf.usage ? usageLabel(wf.usage) : '',
-		})),
-	);
-
-	const groups = $derived.by(() => {
-		const q = query.trim().toLowerCase();
-		const hit = (r: (typeof rows)[number]) =>
-			!q || `${r.wf.name} ${r.usage} ${r.summary}`.toLowerCase().includes(q);
-		return WORKFLOW_USAGES.map((u) => ({
-			usage: u,
-			items: rows.filter((r) => r.wf.usage === u && hit(r)),
-		})).filter((g) => g.items.length);
-	});
-
-	/** Flattened rows in display order — the roving selection walks these. */
-	const flat = $derived(groups.flatMap((g) => g.items));
-
-	// Keep the active row real: default to the current workflow, clamp on
-	// filter changes, never point at a row that is no longer listed.
-	$effect(() => {
-		if (!open) return;
-		if (activeId != null && flat.some((r) => r.wf.id === activeId)) return;
-		activeId = flat.find((r) => r.wf.id === current?.id)?.wf.id ?? flat[0]?.wf.id ?? null;
-	});
-
-	function moveActive(delta: number) {
-		if (!flat.length) return;
-		let i = flat.findIndex((r) => r.wf.id === activeId);
-		i = i < 0 ? (delta > 0 ? 0 : flat.length - 1) : i + delta;
-		activeId = flat[Math.max(0, Math.min(flat.length - 1, i))].wf.id;
-	}
-
-	function pickActive() {
-		const row = flat.find((r) => r.wf.id === activeId) ?? flat[0];
-		if (row) pick(row.wf);
-	}
-
-	function pick(wf: Workflow) {
-		open = false;
-		query = '';
-		if (wf.id !== current?.id) onPick(wf);
-	}
-
-	function onKeydown(e: KeyboardEvent) {
-		if (e.key === 'ArrowDown') {
-			e.preventDefault();
-			moveActive(1);
-		} else if (e.key === 'ArrowUp') {
-			e.preventDefault();
-			moveActive(-1);
-		} else if (e.key === 'Enter') {
-			e.preventDefault();
-			pickActive();
-		}
-	}
-</script>
-
-<div class="picker">
-	<button
-		type="button"
-		id="desk-wf"
-		class="a-chip wf"
-		aria-haspopup="dialog"
-		aria-expanded={open}
-		title={current?.name ?? t('desk.pickWorkflow')}
-		onclick={() => (open = !open)}
-	>
-		<Icon name="playground" size={14} />
-		<span class="lbl">{current?.name ?? t('desk.pickWorkflow')}</span>
-	</button>
-	<ShellPop
-		bind:open
-		label={t('desk.pickWorkflow')}
-		placement="top"
-		width="520px"
-		arrowRoving={false}
-		onclose={() => (query = '')}
-	>
-		<!-- svelte-ignore a11y_no_static_element_interactions -->
-		<div class="pop-body" onkeydown={onKeydown}>
-			<div class="search">
-				<Icon name="search" size={14} />
-				<input
-					class="search-input"
-					type="search"
-					bind:value={query}
-					placeholder={t('desk.wfSearchPh')}
-					aria-label={t('desk.wfSearchPh')}
-				/>
-			</div>
-			<div class="list" role="listbox" aria-label={t('desk.pickWorkflow')}>
-				{#each groups as g (g.usage)}
-					<div class="a-menu-group">{usageLabel(g.usage)} · {g.items.length}</div>
-					{#each g.items as r (r.wf.id)}
-						{@const cur = r.wf.id === current?.id}
-						<button
-							type="button"
-							class="a-menu-item row"
-							class:off={r.status.tone === 'err'}
-							class:active={r.wf.id === activeId}
-							role="option"
-							aria-current={cur ? 'true' : undefined}
-							aria-selected={r.wf.id === activeId ? 'true' : undefined}
-							onclick={() => pick(r.wf)}
-							onpointermove={() => (activeId = r.wf.id)}
-						>
-							<span class="main">
-								<span class="a-menu-label">{r.wf.name}{cur ? ` · ${t('desk.wfCurrent')}` : ''}</span>
-								<span class="sub">
-									<span class="a-tag">{r.summary}</span>
-									<span class="a-tag">{r.conn}</span>
-								</span>
-							</span>
-							<span class="a-tag {r.status.tone}">{r.status.label}</span>
-						</button>
-					{/each}
-				{:else}
-					<p class="empty">{t('desk.wfNoMatch')}</p>
-				{/each}
-			</div>
-			<div class="foot">
-				<a class="a-btn ghost sm" href="/connections">
-					<Icon name="upload" size={13} />
-					{t('desk.wfImport')}
-				</a>
-				<span class="keys">
-					<span class="a-kbd">↑↓</span>{t('desk.keySelect')}
-					<span class="a-kbd">Enter</span>{t('desk.keyUse')}
-					<span class="a-kbd">Esc</span>{t('desk.keyClose')}
-				</span>
-			</div>
-		</div>
-	</ShellPop>
-</div>
-
-	<style>
-	.picker {
-		position: relative;
-		min-width: 0;
-	}
-	.pop-body {
-		display: flex;
-		flex-direction: column;
-	}
-	.search {
-		display: flex;
-		align-items: center;
-		gap: var(--sp-3);
-		padding: var(--sp-3) var(--sp-4) var(--sp-4);
-		border-bottom: 1px solid var(--line);
-		color: var(--text-3);
-	}
-	.search-input {
-		flex: 1;
-		min-width: 0;
-		border: 0;
-		outline: 0;
-		background: transparent;
-		color: var(--text);
-		font: inherit;
-		font-size: var(--fs-section);
-	}
-	.search-input::placeholder {
-		color: var(--text-3);
-	}
-	/* Search and foot stay put; only the list scrolls inside the pop's max-height. */
-	.list {
-		max-height: min(380px, 50vh);
-		overflow-y: auto;
-		padding: var(--sp-1) 0;
-	}
-	.row {
-		align-items: center;
-	}
-	/* 键盘游走选中态（↑↓ 选择 · Enter 使用） */
-	.row.active {
-		background: var(--bg-4);
-	}
-	.main {
-		display: grid;
-		gap: 2px;
-		flex: 1;
-		min-width: 0;
-	}
-	.main .a-menu-label {
-		font-weight: 500;
-	}
-	.row.off .a-menu-label {
-		color: var(--text-3);
-	}
-	.sub {
-		display: flex;
-		flex-wrap: wrap;
-		gap: var(--sp-1);
-	}
-	.empty {
-		margin: 0;
-		padding: var(--sp-6) var(--sp-4);
-		color: var(--text-3);
-		font-size: var(--fs-aux);
-	}
-	.foot {
-		display: flex;
-		align-items: center;
-		gap: var(--sp-2);
-		padding: var(--sp-3) var(--sp-1) 0;
-		border-top: 1px solid var(--line);
-	}
-	.keys {
-		display: inline-flex;
-		align-items: center;
-		gap: var(--sp-1);
-		margin-left: auto;
-		font-size: var(--fs-mini);
-		color: var(--text-3);
-		white-space: nowrap;
-	}
-	.keys .a-kbd:not(:first-child) {
-		margin-left: var(--sp-2);
-	}
-	@media (max-width: 760px) {
-		.keys {
-			display: none;
-		}
-	}
-</style>
@@ -2081,6 +2081,36 @@ export const de: Dict = {
 	'desk.wfUntested': 'Nicht getestet',
 	'desk.workflow': 'Workflow',
 	'desk.yesterday': 'Gestern',
+	// --- Dreispaltige Desk (HEL-683) ---
+	'desk.bandChange': "Workflow wechseln",
+	'desk.bayCloudBody': "Cloud-Modelle für Bild / Video (gpt-image2, nano-banana, Jimeng, Kling, …) sind noch nicht angebunden. Nach der Anbindung erscheinen sie mit ihren echten Fähigkeiten — nie als unbenutzbare Einträge.",
+	'desk.bayCloudTitle': "Cloud-Generierung nicht angebunden",
+	'desk.bayCount': "{n} / {total} Workflows",
+	'desk.bayFavOnly': "Favoriten",
+	'desk.bayMore': "{n} weitere anzeigen",
+	'desk.bayNoFamily': "Modell unbekannt",
+	'desk.bayPending': "{n} offen (Zweck / Ausgabe ungeklärt)",
+	'desk.bayReqAria': "Eingabeanforderungen",
+	'desk.bayReqTitle': "Eingabeanforderungen",
+	'desk.baySearchPh': "Name, Beschreibung, Modell, Zweck suchen…",
+	'desk.baySourceCloud': "Cloud",
+	'desk.baySourceLabel': "Generierungsquelle",
+	'desk.baySourceLocal': "Lokal",
+	'desk.modeAll': "Alle",
+	'desk.modeEmpty': "Für diesen Modus gibt es noch keinen nutzbaren Workflow",
+	'desk.modeRailAria': "Aufgabenmodi",
+	'desk.modeRailTitle': "Aufgabenmodi",
+	'desk.pvBackCreate': "Zurück zum Erstellen",
+	'desk.pvCurrent': "Aktueller Workflow",
+	'desk.pvEmpty': "Links einen Workflow wählen, um die Eingaben zu sehen",
+	'desk.pvFav': "Zu Favoriten",
+	'desk.pvLastUsed': "Zuletzt genutzt",
+	'desk.pvParamCount': "Parameter",
+	'desk.pvSlotsLoading': "Eingabeslots werden gelesen…",
+	'desk.pvUnfav': "Aus Favoriten entfernen",
+	'desk.pvUse': "Diesen Workflow verwenden",
+	'desk.railFav': "Favoriten",
+	'desk.railRecent': "Zuletzt",
 	'wfd.stepParse': 'JSON parsen',
 	'wfd.stepNodes': 'Knoten erkennen',
 	'wfd.stepModels': 'Modelle prüfen',
@@ -2080,6 +2080,36 @@ export const en = {
 	'desk.wfUntested': 'Not tested',
 	'desk.workflow': 'Workflow',
 	'desk.yesterday': 'Yesterday',
+	// --- Three-section desk (HEL-683) ---
+	'desk.bandChange': "Change workflow",
+	'desk.bayCloudBody': "Cloud image / video models (gpt-image2, nano-banana, Jimeng, Kling, …) are not connected to this product yet. Once integrated they will be listed with their real capabilities — never as unusable entries.",
+	'desk.bayCloudTitle': "Cloud generation not connected",
+	'desk.bayCount': "{n} / {total} workflows",
+	'desk.bayFavOnly': "Favorites",
+	'desk.bayMore': "Show {n} more",
+	'desk.bayNoFamily': "Unrecognized model",
+	'desk.bayPending': "{n} pending confirmation (usage / output unsettled)",
+	'desk.bayReqAria': "Input requirements",
+	'desk.bayReqTitle': "Input requirements",
+	'desk.baySearchPh': "Search name, description, model, usage…",
+	'desk.baySourceCloud': "Cloud",
+	'desk.baySourceLabel': "Generation source",
+	'desk.baySourceLocal': "Local",
+	'desk.modeAll': "All",
+	'desk.modeEmpty': "No runnable workflow for this mode yet",
+	'desk.modeRailAria': "Task modes",
+	'desk.modeRailTitle': "Task modes",
+	'desk.pvBackCreate': "Back to creating",
+	'desk.pvCurrent': "Current workflow",
+	'desk.pvEmpty': "Pick a workflow on the left to see its input requirements",
+	'desk.pvFav': "Add to favorites",
+	'desk.pvLastUsed': "Last used",
+	'desk.pvParamCount': "Parameters",
+	'desk.pvSlotsLoading': "Loading input slots…",
+	'desk.pvUnfav': "Remove from favorites",
+	'desk.pvUse': "Use this workflow",
+	'desk.railFav': "Favorites",
+	'desk.railRecent': "Recent",
 	'wfd.stepParse': 'Parse JSON',
 	'wfd.stepNodes': 'Identify nodes',
 	'wfd.stepModels': 'Verify models',
@@ -2081,6 +2081,36 @@ export const es: Dict = {
 	'desk.wfUntested': 'Sin probar',
 	'desk.workflow': 'Flujo',
 	'desk.yesterday': 'Ayer',
+	// --- Escritorio de tres secciones (HEL-683) ---
+	'desk.bandChange': "Cambiar flujo",
+	'desk.bayCloudBody': "Los modelos de nube para imagen / vídeo (gpt-image2, nano-banana, Jimeng, Kling, …) aún no están conectados a este producto. Al integrarse se listarán con sus capacidades reales, nunca como entradas inutilizables.",
+	'desk.bayCloudTitle': "Generación en la nube no conectada",
+	'desk.bayCount': "{n} / {total} flujos",
+	'desk.bayFavOnly': "Favoritos",
+	'desk.bayMore': "Mostrar {n} más",
+	'desk.bayNoFamily': "Modelo no identificado",
+	'desk.bayPending': "{n} pendientes de confirmar (uso / salida sin fijar)",
+	'desk.bayReqAria': "Requisitos de entrada",
+	'desk.bayReqTitle': "Requisitos de entrada",
+	'desk.baySearchPh': "Buscar nombre, descripción, modelo, uso…",
+	'desk.baySourceCloud': "Nube",
+	'desk.baySourceLabel': "Origen de generación",
+	'desk.baySourceLocal': "Local",
+	'desk.modeAll': "Todos",
+	'desk.modeEmpty': "Aún no hay flujo utilizable para este modo",
+	'desk.modeRailAria': "Modos de tarea",
+	'desk.modeRailTitle': "Modos de tarea",
+	'desk.pvBackCreate': "Volver a crear",
+	'desk.pvCurrent': "Flujo actual",
+	'desk.pvEmpty': "Elige un flujo a la izquierda para ver sus requisitos",
+	'desk.pvFav': "Añadir a favoritos",
+	'desk.pvLastUsed': "Último uso",
+	'desk.pvParamCount': "Parámetros",
+	'desk.pvSlotsLoading': "Leyendo ranuras de entrada…",
+	'desk.pvUnfav': "Quitar de favoritos",
+	'desk.pvUse': "Usar este flujo",
+	'desk.railFav': "Favoritos",
+	'desk.railRecent': "Recientes",
 	'wfd.stepParse': 'Analizar JSON',
 	'wfd.stepNodes': 'Identificar nodos',
 	'wfd.stepModels': 'Verificar modelos',
@@ -2081,6 +2081,36 @@ export const fr: Dict = {
 	'desk.wfUntested': 'Non testé',
 	'desk.workflow': 'Workflow',
 	'desk.yesterday': 'Hier',
+	// --- Bureau en trois sections (HEL-683) ---
+	'desk.bandChange': "Changer de flux",
+	'desk.bayCloudBody': "Les modèles cloud d'image / vidéo (gpt-image2, nano-banana, Jimeng, Kling, …) ne sont pas encore connectés à ce produit. Une fois intégrés, ils seront listés avec leurs capacités réelles — jamais en entrées inutilisables.",
+	'desk.bayCloudTitle': "Génération cloud non connectée",
+	'desk.bayCount': "{n} / {total} flux",
+	'desk.bayFavOnly': "Favoris",
+	'desk.bayMore': "Afficher {n} de plus",
+	'desk.bayNoFamily': "Modèle non identifié",
+	'desk.bayPending': "{n} à confirmer (usage / sortie non fixés)",
+	'desk.bayReqAria': "Exigences d'entrée",
+	'desk.bayReqTitle': "Exigences d'entrée",
+	'desk.baySearchPh': "Rechercher nom, description, modèle, usage…",
+	'desk.baySourceCloud': "Cloud",
+	'desk.baySourceLabel': "Source de génération",
+	'desk.baySourceLocal': "Local",
+	'desk.modeAll': "Tous",
+	'desk.modeEmpty': "Aucun flux utilisable pour ce mode pour l'instant",
+	'desk.modeRailAria': "Modes de tâche",
+	'desk.modeRailTitle': "Modes de tâche",
+	'desk.pvBackCreate': "Retour à la création",
+	'desk.pvCurrent': "Flux actuel",
+	'desk.pvEmpty': "Choisissez un flux à gauche pour voir ses exigences d'entrée",
+	'desk.pvFav': "Ajouter aux favoris",
+	'desk.pvLastUsed': "Dernière utilisation",
+	'desk.pvParamCount': "Paramètres",
+	'desk.pvSlotsLoading': "Lecture des emplacements d’entrée…",
+	'desk.pvUnfav': "Retirer des favoris",
+	'desk.pvUse': "Utiliser ce flux",
+	'desk.railFav': "Favoris",
+	'desk.railRecent': "Récents",
 	'wfd.stepParse': 'Analyser le JSON',
 	'wfd.stepNodes': 'Identifier les nœuds',
 	'wfd.stepModels': 'Vérifier les modèles',
@@ -2079,6 +2079,36 @@ export const ja: Dict = {
 	'desk.wfUntested': '未テスト',
 	'desk.workflow': 'ワークフロー',
 	'desk.yesterday': '昨日',
+	// --- 三段構成デスク (HEL-683) ---
+	'desk.bandChange': "ワークフローを変更",
+	'desk.bayCloudBody': "クラウドの画像／動画モデル（gpt-image2、nano-banana、即夢、Kling など）はまだ本製品に接続されていません。接続後は実際の機能とともに一覧表示され、使えない項目が並ぶことはありません。",
+	'desk.bayCloudTitle': "クラウド生成は未接続",
+	'desk.bayCount': "{n} / {total} 件のワークフロー",
+	'desk.bayFavOnly': "お気に入り",
+	'desk.bayMore': "さらに {n} 件表示",
+	'desk.bayNoFamily': "モデル未識別",
+	'desk.bayPending': "確認待ち {n} 件（用途／出力未確定）",
+	'desk.bayReqAria': "入力要件",
+	'desk.bayReqTitle': "入力要件",
+	'desk.baySearchPh': "名前・説明・モデル・用途を検索…",
+	'desk.baySourceCloud': "クラウド",
+	'desk.baySourceLabel': "生成ソース",
+	'desk.baySourceLocal': "ローカル",
+	'desk.modeAll': "すべて",
+	'desk.modeEmpty': "このモードで利用できるワークフローはまだありません",
+	'desk.modeRailAria': "タスクモード",
+	'desk.modeRailTitle': "タスクモード",
+	'desk.pvBackCreate': "作成に戻る",
+	'desk.pvCurrent': "現在のワークフロー",
+	'desk.pvEmpty': "左でワークフローを選ぶと入力要件が表示されます",
+	'desk.pvFav': "お気に入りに追加",
+	'desk.pvLastUsed': "最終使用",
+	'desk.pvParamCount': "パラメータ数",
+	'desk.pvSlotsLoading': "入力スロットを読み込み中…",
+	'desk.pvUnfav': "お気に入りから外す",
+	'desk.pvUse': "このワークフローを使う",
+	'desk.railFav': "お気に入り",
+	'desk.railRecent': "最近の使用",
 	'wfd.stepParse': 'JSON を解析',
 	'wfd.stepNodes': 'ノードを識別',
 	'wfd.stepModels': 'モデルを確認',
@@ -2079,6 +2079,36 @@ export const ko: Dict = {
 	'desk.wfUntested': '테스트 안 함',
 	'desk.workflow': '워크플로',
 	'desk.yesterday': '어제',
+	// --- 3단 구성 데스크 (HEL-683) ---
+	'desk.bandChange': "워크플로 변경",
+	'desk.bayCloudBody': "클라우드 이미지 / 동영상 모델(gpt-image2, nano-banana, 지멍, 클링 등)은 아직 이 제품에 연결되지 않았습니다. 연결 후 실제 기능과 함께 표시되며, 사용할 수 없는 항목은 나타나지 않습니다.",
+	'desk.bayCloudTitle': "클라우드 생성 미연결",
+	'desk.bayCount': "{n} / {total}개 워크플로",
+	'desk.bayFavOnly': "즐겨찾기",
+	'desk.bayMore': "{n}개 더 보기",
+	'desk.bayNoFamily': "미식별 모델",
+	'desk.bayPending': "확인 대기 {n}개(용도 / 출력 미확정)",
+	'desk.bayReqAria': "입력 요구 사항",
+	'desk.bayReqTitle': "입력 요구 사항",
+	'desk.baySearchPh': "이름, 설명, 모델, 용도 검색…",
+	'desk.baySourceCloud': "클라우드",
+	'desk.baySourceLabel': "생성 소스",
+	'desk.baySourceLocal': "로컬",
+	'desk.modeAll': "전체",
+	'desk.modeEmpty': "이 모드에서 사용 가능한 워크플로가 아직 없습니다",
+	'desk.modeRailAria': "작업 모드",
+	'desk.modeRailTitle': "작업 모드",
+	'desk.pvBackCreate': "만들기로 돌아가기",
+	'desk.pvCurrent': "현재 워크플로",
+	'desk.pvEmpty': "왼쪽에서 워크플로를 선택하면 입력 요구 사항이 표시됩니다",
+	'desk.pvFav': "즐겨찾기에 추가",
+	'desk.pvLastUsed': "최근 사용",
+	'desk.pvParamCount': "매개변수 수",
+	'desk.pvSlotsLoading': "입력 슬롯 읽는 중…",
+	'desk.pvUnfav': "즐겨찾기에서 제거",
+	'desk.pvUse': "이 워크플로 사용",
+	'desk.railFav': "즐겨찾기",
+	'desk.railRecent': "최근 사용",
 	'wfd.stepParse': 'JSON 파싱',
 	'wfd.stepNodes': '노드 식별',
 	'wfd.stepModels': '모델 확인',
@@ -2079,6 +2079,36 @@ export const zh: Dict = {
 	'desk.wfUntested': '未试运行',
 	'desk.workflow': '工作流',
 	'desk.yesterday': '昨天',
+	// --- 三段式生成台 (HEL-683) ---
+	'desk.bandChange': "更换工作流",
+	'desk.bayCloudBody': "云端生图 / 生视频模型（gpt-image2、nano-banana、即梦、可灵等）尚未接入本产品。接入后这里会按真实能力列出，不会展示无法使用的条目。",
+	'desk.bayCloudTitle': "云端生成未接入",
+	'desk.bayCount': "{n} / {total} 个工作流",
+	'desk.bayFavOnly': "收藏",
+	'desk.bayMore': "再显示 {n} 个",
+	'desk.bayNoFamily': "未识别模型",
+	'desk.bayPending': "{n} 个待确认（用途 / 输出未定）",
+	'desk.bayReqAria': "输入要求",
+	'desk.bayReqTitle': "输入要求",
+	'desk.baySearchPh': "搜索名称、说明、模型、用途…",
+	'desk.baySourceCloud': "云端",
+	'desk.baySourceLabel': "生成来源",
+	'desk.baySourceLocal': "本机",
+	'desk.modeAll': "全部",
+	'desk.modeEmpty': "该模式暂无可用工作流",
+	'desk.modeRailAria': "任务模式",
+	'desk.modeRailTitle': "任务模式",
+	'desk.pvBackCreate': "返回创作",
+	'desk.pvCurrent': "当前工作流",
+	'desk.pvEmpty': "在左侧选择一个工作流查看输入要求",
+	'desk.pvFav': "加入收藏",
+	'desk.pvLastUsed': "最近使用",
+	'desk.pvParamCount': "参数项",
+	'desk.pvSlotsLoading': "正在读取输入槽位…",
+	'desk.pvUnfav': "取消收藏",
+	'desk.pvUse': "使用此工作流",
+	'desk.railFav': "收藏",
+	'desk.railRecent': "最近使用",
 	'wfd.stepParse': '解析 JSON',
 	'wfd.stepNodes': '识别节点',
 	'wfd.stepModels': '核对模型',
@@ -1,5 +1,5 @@
 <script lang="ts">
-	import StudioGenerate from '$lib/components/studio/StudioGenerate.svelte';
+	import StudioDesk from '$lib/components/desk/StudioDesk.svelte';
 </script>

-<StudioGenerate kind="image" />
+<StudioDesk kind="image" />
@@ -1,5 +1,5 @@
 <script lang="ts">
-	import StudioGenerate from '$lib/components/studio/StudioGenerate.svelte';
+	import StudioDesk from '$lib/components/desk/StudioDesk.svelte';
 </script>

-<StudioGenerate kind="video" />
+<StudioDesk kind="video" />
@@ -0,0 +1,46 @@
+# S4：三段式图片 / 视频生成台（HEL-683）
+
+按 HEL-679 已确认的三张融合样稿，把 `/image` 与 `/video` 两个入口接入同一
+个三段式生成台。本批只动 `calliope-web`，生成后端与项目回流（S5）零改动。
+
+## 三段式布局（新增 `components/desk/`）
+
+- `StudioDesk.svelte` 取代 `StudioGenerate.svelte` 成为 `/image`、`/video`
+  的共用页面（薄壳不变，`kind` 决定任务模式）；右栏沿用既有
+  `Composer / SlotTray / Inspector / TakeFeed / ContextBar`，仅重排布局。
+- 左栏 `TaskModeRail.svelte`：任务模式按真实工作流统计计数，未覆盖模式置灰；
+  底部收藏 / 最近使用直达；≤760px 退化为横向模式条。
+- 中栏挑选台 `WorkflowBay.svelte`（含 `LibraryFilters / LibraryRow /
+  InputRequirementBadge`）：搜索、本机 / 云端来源分段、按模型家族分组、
+  收藏过滤、待确认计数与入口；长列表增量渲染（48/批）+ `content-visibility`，
+  键盘 ↑↓/J/K 游走、Enter 使用、Esc 关闭。
+- 挑选时中栏展开（grid 列宽动画，`data-reduce` 下直接跳变），右侧显示
+  `WorkflowPreview.svelte` 输入要求预览（S2 元数据 + 按需加载的槽位摘要）；
+  选定后收成摘要带（band），一键重新展开。≤1179px 挑选台为全屏浮层。
+- 云端来源是诚实占位：明确标注「云端生成未接入」，不造可点击的虚假能力；
+  数据结构按 `source: 'comfy' | 'cloud'` 预留。
+
+## 数据与路由
+
+- 挑选台 / 任务模式 / 摘要带全部走 `GET /api/workflows?view=meta` 轻量元数据
+  （150+ 条不下载 workflow_json）；完整记录改为按 id 惰性加载（当前工作流、
+  记录流里出现的工作流、预览行），feed 名称先用元数据桩、schema 到位后补全，
+  「工作流已删除」判定以元数据为准，不在加载期误报。
+- 新增查询参数：`?wf=<id>` 深链指定工作流、`?mode=<task-mode>` 预选任务模式；
+  五阶段 `deskHref` 的 `from=workbench` 上下文条与返回路径保持不变。
+- Composer 的工作流芯片从 380px 下拉弹层改为展开挑选台（`#desk-wf` 语义
+  不变，仍是缺工作流时的定位目标）；`WorkflowPicker.svelte` 删除。
+- 最近使用沿用后端入队时写入的 `last_used_at`（queue/manager 原有逻辑），
+  提交后刷新轻量列表即可。
+
+## 验证
+
+- `npm run check`（0 错误，2 条基线既有警告）、`npm run test`、`npm run build`
+  通过；prettier 对本批文件通过（仓库 lint 基线因 prettier 3.9 全量重排 +
+  无 eslint 配置本就不可用，未扩面修复）。
+- `e2e/shoot.mjs` 全绿：挑选台键盘链（展开→搜索→↑↓→Enter→调参→提交）、
+  SSE 状态语义、删除撤销、任务页、窄屏无溢出、减动效；同时把 7 处 S1 灰阶
+  化后未更新的旧色值断言修正为 theme-1 实际值（定影文案 + 灰阶信号色）。
+- `e2e/lastframe.mjs` 全绿（视频检视、尾帧导出、手机弹层无回归）。
+- 手工走查：`?wf` / `?mode` / `from=workbench` 上下文预填与返回、1024/390
+  无横向溢出，截图见 `e2e/shots/hel683-*.png`。
@@ -69,14 +69,15 @@ const run = async () => {
 	const page = await ctx.newPage();
 	page.on('pageerror', (e) => console.log('PAGEERROR:', e.message));

-	// ---------- 工作流选择器：↑↓ 高亮 + Enter 使用 ----------
+	// ---------- 挑选台（HEL-683 三段式）：摘要带展开 → ↑↓ 高亮 + Enter 使用 ----------
 	await page.goto('http://127.0.0.1:5173/image');
 	await page.waitForSelector('#desk-prompt', { timeout: 15000 });
-	await page.click('#desk-wf');
-	await page.waitForSelector('.shell-pop');
-	const activeRows = page.locator('.shell-pop .row.active');
+	await page.click('.bay-band .band-hit');
+	await page.waitForSelector('.bay .row.active', { timeout: 10000 });
+	await page.waitForSelector('.bay .search-input');
+	const activeRows = page.locator('.bay .row.active');
 	const nActive = await activeRows.count();
-	ok('工作流面板有默认高亮行', nActive === 1);
+	ok('挑选台有默认高亮行', nActive === 1);
 	await page.keyboard.press('ArrowDown');
 	await page.keyboard.press('ArrowDown');
 	const label1 = await activeRows.first().textContent();
@@ -86,15 +87,19 @@ const run = async () => {
 	const chipBefore = await page.locator('#desk-wf .lbl').textContent();
 	await page.keyboard.press('Enter');
 	await page.waitForTimeout(400);
+	ok('Enter 使用高亮的工作流（挑选台收起）', (await page.locator('.bay.open').count()) === 0);
 	const chipAfter = await page.locator('#desk-wf .lbl').textContent();
-	ok('Enter 使用高亮的工作流', chipBefore !== chipAfter || (await activeRows.count()) === 0, `${chipBefore} → ${chipAfter}`);
-	await page.screenshot({ path: `${SHOTS}/01-picker-roving.png` });
+	ok('输入台芯片跟随选中工作流', chipBefore !== chipAfter, `${chipBefore} → ${chipAfter}`);
+	await page.screenshot({ path: `${SHOTS}/01-bay-roving.png` });

-	// 回到文生图工作流
-	await page.click('#desk-wf');
-	await page.fill('.shell-pop .search-input', '文生图');
+	// 回到文生图工作流（搜索唯一命中「回归」）
+	await page.click('.bay-band .band-hit');
+	await page.waitForSelector('.bay .search-input');
+	await page.fill('.bay .search-input', '回归');
+	await page.waitForSelector('.bay .row.active');
 	await page.keyboard.press('Enter');
 	await page.waitForTimeout(300);
+	ok('搜索后 Enter 选中文生图工作流', (await page.locator('#desk-wf .lbl').textContent()).includes('文生图'));

 	// ---------- 提交 → 完成（绿标签 + 自动切结果页） ----------
 	setMode({ mode: 'ok', delay_sec: 0 });
@@ -116,9 +121,9 @@ const run = async () => {
 	// 绿标签
 	const doneCard = page.locator('.take', { hasText: '柴犬' }).first();
 	const doneTag = await doneCard.locator('.state .a-tag').first().textContent();
-	ok('完成态为绿色「完成」标签（非金色）', (doneTag || '').includes('完成'), doneTag);
+	ok('完成态为「定影」标签（HEL-680 灰阶语义）', (doneTag || '').includes('定影'), doneTag);
 	const tagColor = await doneCard.locator('.state .a-tag').first().evaluate((el) => getComputedStyle(el).color);
-	ok('完成标签用信号绿 rgb(73,203,144)', tagColor === 'rgb(73, 203, 144)', tagColor);
+	ok('完成标签用灰阶信号色 rgb(221,221,215)', tagColor === 'rgb(221, 221, 215)', tagColor);
 	await page.screenshot({ path: `${SHOTS}/02-desk-done.png` });

 	// ---------- 慢任务：排队灰 + 运行青 + 进度条 ----------
@@ -130,9 +135,9 @@ const run = async () => {
 	await page.click('.a-btn.primary'); // 第二个：queued 灰
 	await page.waitForTimeout(4000);
 	const runTag = await stateTag(page, '观察进度').textContent();
-	ok('运行中为青色「生成中」', /生成中|执行/.test(runTag || ''), runTag);
+	ok('运行中为「生成中/执行中」', /生成中|执行/.test(runTag || ''), runTag);
 	const runTagColor = await stateTag(page, '观察进度').evaluate((el) => getComputedStyle(el).color);
-	ok('运行标签用信号青 rgb(84,223,210)', runTagColor === 'rgb(84, 223, 210)', runTagColor);
+	ok('运行标签用灰阶信号色 rgb(184,182,172)', runTagColor === 'rgb(184, 182, 172)', runTagColor);
 	const hasBar = (await page.locator('.take', { hasText: '观察进度' }).locator('.a-progress').count()) > 0;
 	ok('运行中卡片有进度条', hasBar);
 	const queueTag = await stateTag(page, '第二个任务').textContent();
@@ -175,7 +180,7 @@ const run = async () => {
 	const failTag = await failCard.locator('.state .a-tag').first().textContent();
 	ok('失败为红色「失败」标签', (failTag || '').includes('失败'), failTag);
 	const failColor = await failCard.locator('.state .a-tag').first().evaluate((el) => getComputedStyle(el).color);
-	ok('失败标签用信号红 rgb(240,100,90)', failColor === 'rgb(240, 100, 90)', failColor);
+	ok('失败标签用信号红 rgb(208,122,107)（灰阶底上的红）', failColor === 'rgb(208, 122, 107)', failColor);
 	const errLine = failCard.locator('.err-txt');
 	ok('失败自动展开一行中文结论', (await errLine.count()) === 1 && (await errLine.textContent()).length > 4);
 	await errLine.click();
@@ -199,7 +204,7 @@ const run = async () => {
 	const undoBtn = page.locator('.toast .action', { hasText: '撤销' });
 	ok('出现带「撤销」的 Toast', (await undoBtn.count()) === 1);
 	const undoColor = await undoBtn.evaluate((el) => getComputedStyle(el).color);
-	ok('撤销动作按钮为金色文字 rgb(242,199,132)', undoColor === 'rgb(242, 199, 132)', undoColor);
+	ok('撤销动作按钮为强调白文字 rgb(245,244,238)', undoColor === 'rgb(245, 244, 238)', undoColor);
 	await page.screenshot({ path: `${SHOTS}/05-undo-toast.png` });
 	const countDeleted = await cardCount(page);
 	ok('删除后行立即收起', countDeleted === countBefore - 1, `${countBefore} → ${countDeleted}`);
@@ -237,7 +242,7 @@ const run = async () => {
 	const goneTag = await goneCard.locator('.state .a-tag').first().textContent();
 	ok('文件缺失为琥珀「文件缺失」', (goneTag || '').includes('文件缺失'), goneTag);
 	const goneColor = await goneCard.locator('.state .a-tag').first().evaluate((el) => getComputedStyle(el).color);
-	ok('缺失标签用琥珀 rgb(240,180,92)', goneColor === 'rgb(240, 180, 92)', goneColor);
+	ok('缺失标签用信号琥珀 rgb(163,145,95)', goneColor === 'rgb(163, 145, 95)', goneColor);
 	ok('缺失态给「用相同参数重做」', (await goneCard.getByRole('button', { name: '用相同参数重做' }).count()) === 1);
 	ok('缺失态给「移除记录」', (await goneCard.getByRole('button', { name: '移除记录' }).count()) === 1);
 	await goneCard.getByRole('button', { name: '用相同参数重做' }).click();
@@ -284,7 +289,7 @@ const run = async () => {
 	ok('任务页筛选芯片组（含失败/进行中）', (await chips.count()) === 5);
 	// 默认「全部」选中即金色文字（accent-soft 底）
 	const selChipColor = await chips.first().evaluate((el) => getComputedStyle(el).color);
-	ok('选中筛选芯片为金色文字', selChipColor === 'rgb(242, 199, 132)', selChipColor);
+	ok('选中筛选芯片为强调白文字', selChipColor === 'rgb(245, 244, 238)', selChipColor);
 	const failedChipColor = await chips.nth(3).evaluate((el) => getComputedStyle(el).color);
 	await chips.nth(3).click(); // 失败
 	await page.waitForTimeout(300);