feat(frontend): add "add to pool" button on the file viewer

Extract the bottom-sheet pool picker (load, search, add) into a
reusable PoolPicker component and use it both for the grid's bulk
selection and from a new button in the file viewer's top bar, which adds
the single open file to a chosen pool. While the picker is open the
viewer hands it the keyboard so Escape closes the sheet (even from its
search) instead of the viewer.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/lib/components/file/FileViewer.svelte

@@ -4,6 +4,7 @@
 	import { api, ApiError } from '$lib/api/client';
 	import { authStore } from '$lib/stores/auth';
 	import TagPicker from '$lib/components/file/TagPicker.svelte';
+	import PoolPicker from '$lib/components/file/PoolPicker.svelte';
 	import type { File, Tag } from '$lib/api/types';
 
 	interface Props {
@@ -26,6 +27,7 @@
 	let loading = $state(true);
 	let saving = $state(false);
 	let error = $state('');
+	let poolPickerOpen = $state(false);
 
 	// Tags are loaded lazily — the Tags section sits below a full-viewport
 	// preview, so fetching them on open just hammers the DB for data the user
@@ -196,6 +198,17 @@
 	}
 
 	function handleKeydown(e: KeyboardEvent) {
+		// While the pool picker is open it owns the keyboard: Escape closes it
+		// (even from its search field), and every other key is swallowed so the
+		// viewer's shortcuts don't fire behind the modal. Typing still works —
+		// non-Escape keys aren't prevented, only ignored here.
+		if (poolPickerOpen) {
+			if (e.key === 'Escape') {
+				e.preventDefault();
+				poolPickerOpen = false;
+			}
+			return;
+		}
 		if (e.target instanceof HTMLInputElement || e.target instanceof HTMLTextAreaElement) return;
 		if (e.ctrlKey || e.metaKey || e.altKey) return;
 		// Letter keys are matched by physical position (e.code) so j/k/e work on any
@@ -265,6 +278,32 @@
 			</svg>
 		</button>
 		<span class="filename">{file?.original_name ?? ''}</span>
+		{#if file}
+			<button
+				class="pool-btn"
+				onclick={() => (poolPickerOpen = true)}
+				aria-label="Add to pool"
+				title="Add to pool"
+			>
+				<svg width="20" height="20" viewBox="0 0 20 20" fill="none" aria-hidden="true">
+					<rect
+						x="3"
+						y="5"
+						width="14"
+						height="11"
+						rx="2"
+						stroke="currentColor"
+						stroke-width="1.6"
+					/>
+					<path
+						d="M10 8.5v4M8 10.5h4"
+						stroke="currentColor"
+						stroke-width="1.6"
+						stroke-linecap="round"
+					/>
+				</svg>
+			</button>
+		{/if}
 	</div>
 
 	<!-- Preview -->
@@ -409,6 +448,10 @@
 	</div>
 </div>
 
+{#if poolPickerOpen && file}
+	<PoolPicker fileIds={[file.id!]} onClose={() => (poolPickerOpen = false)} />
+{/if}
+
 <style>
 	.viewer-page {
 		display: flex;
@@ -457,6 +500,25 @@
 		white-space: nowrap;
 	}
 
+	.pool-btn {
+		margin-left: auto;
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		width: 36px;
+		height: 36px;
+		border-radius: 8px;
+		border: none;
+		background: none;
+		color: var(--color-text-primary);
+		cursor: pointer;
+		flex-shrink: 0;
+	}
+
+	.pool-btn:hover {
+		background-color: color-mix(in srgb, var(--color-accent) 15%, transparent);
+	}
+
 	/* ---- Preview ---- */
 	.preview-wrap {
 		position: relative;

frontend/src/lib/components/file/PoolPicker.svelte

@@ -0,0 +1,251 @@
+<script lang="ts">
+	import { api } from '$lib/api/client';
+	import type { Pool, PoolOffsetPage } from '$lib/api/types';
+
+	interface Props {
+		/** Files to add to the chosen pool. */
+		fileIds: string[];
+		/** Called after a successful add (before close) — e.g. to clear a selection. */
+		onAdded?: (poolId: string) => void;
+		/** Close the picker without adding. */
+		onClose: () => void;
+	}
+
+	let { fileIds, onAdded, onClose }: Props = $props();
+
+	let pools = $state<Pool[]>([]);
+	let loading = $state(true);
+	let loadError = $state('');
+	let addError = $state('');
+	let search = $state('');
+	let busy = $state(false);
+
+	$effect(() => {
+		void load();
+	});
+
+	async function load() {
+		loading = true;
+		loadError = '';
+		try {
+			const res = await api.get<PoolOffsetPage>('/pools?limit=200&sort=name&order=asc');
+			pools = res.items ?? [];
+		} catch {
+			loadError = 'Failed to load pools';
+		} finally {
+			loading = false;
+		}
+	}
+
+	let filtered = $derived(
+		search.trim()
+			? pools.filter((p) => p.name?.toLowerCase().includes(search.toLowerCase()))
+			: pools
+	);
+
+	async function add(poolId: string) {
+		if (busy) return;
+		busy = true;
+		addError = '';
+		try {
+			await api.post(`/pools/${poolId}/files`, { file_ids: fileIds });
+			onAdded?.(poolId);
+			onClose();
+		} catch {
+			addError = 'Failed to add to pool';
+			busy = false;
+		}
+	}
+
+	let count = $derived(fileIds.length);
+</script>
+
+<!-- svelte-ignore a11y_click_events_have_key_events -->
+<div class="picker-backdrop" role="presentation" onclick={onClose}></div>
+<div class="picker-sheet" class:busy role="dialog" aria-label="Add to pool">
+	<div class="picker-header">
+		<span class="picker-title">Add {count} file{count !== 1 ? 's' : ''} to pool</span>
+		<button class="picker-close" onclick={onClose} aria-label="Close">
+			<svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true">
+				<path
+					d="M3 3l10 10M13 3L3 13"
+					stroke="currentColor"
+					stroke-width="1.8"
+					stroke-linecap="round"
+				/>
+			</svg>
+		</button>
+	</div>
+
+	<div class="picker-search-wrap">
+		<input
+			class="picker-search"
+			type="search"
+			placeholder="Search pools…"
+			bind:value={search}
+			autocomplete="off"
+		/>
+	</div>
+
+	{#if loading}
+		<p class="picker-empty">Loading…</p>
+	{:else if loadError}
+		<p class="picker-error">{loadError}</p>
+	{:else}
+		{#if addError}
+			<p class="picker-error">{addError}</p>
+		{/if}
+		{#if filtered.length === 0}
+			<p class="picker-empty">No pools found.</p>
+		{:else}
+			<ul class="picker-list">
+				{#each filtered as pool (pool.id)}
+					<li>
+						<button class="picker-item" onclick={() => pool.id && add(pool.id)}>
+							<span class="picker-item-name">{pool.name}</span>
+							<span class="picker-item-count">{pool.file_count ?? 0} files</span>
+						</button>
+					</li>
+				{/each}
+			</ul>
+		{/if}
+	{/if}
+</div>
+
+<style>
+	.picker-backdrop {
+		position: fixed;
+		inset: 0;
+		z-index: 110;
+		background: rgba(0, 0, 0, 0.5);
+	}
+
+	.picker-sheet {
+		position: fixed;
+		left: 0;
+		right: 0;
+		bottom: 0;
+		z-index: 111;
+		background-color: var(--color-bg-secondary);
+		border-radius: 14px 14px 0 0;
+		padding-bottom: env(safe-area-inset-bottom, 0px);
+		max-height: 70dvh;
+		display: flex;
+		flex-direction: column;
+		animation: slide-up 0.18s ease-out;
+	}
+
+	.picker-sheet.busy {
+		opacity: 0.6;
+		pointer-events: none;
+	}
+
+	@keyframes slide-up {
+		from {
+			transform: translateY(20px);
+			opacity: 0;
+		}
+		to {
+			transform: translateY(0);
+			opacity: 1;
+		}
+	}
+
+	.picker-header {
+		display: flex;
+		align-items: center;
+		padding: 14px 16px 10px;
+		gap: 8px;
+	}
+
+	.picker-title {
+		flex: 1;
+		font-size: 0.95rem;
+		font-weight: 600;
+	}
+
+	.picker-close {
+		background: none;
+		border: none;
+		cursor: pointer;
+		color: var(--color-text-muted);
+		padding: 4px;
+		display: flex;
+		align-items: center;
+	}
+
+	.picker-close:hover {
+		color: var(--color-text-primary);
+	}
+
+	.picker-search-wrap {
+		padding: 0 14px 10px;
+	}
+
+	.picker-search {
+		width: 100%;
+		box-sizing: border-box;
+		height: 34px;
+		padding: 0 10px;
+		border-radius: 8px;
+		border: 1px solid color-mix(in srgb, var(--color-accent) 30%, transparent);
+		background-color: var(--color-bg-elevated);
+		color: var(--color-text-primary);
+		font-size: 0.9rem;
+		font-family: inherit;
+		outline: none;
+	}
+
+	.picker-search:focus {
+		border-color: var(--color-accent);
+	}
+
+	.picker-list {
+		list-style: none;
+		margin: 0;
+		padding: 0 8px 12px;
+		overflow-y: auto;
+		flex: 1;
+	}
+
+	.picker-item {
+		display: flex;
+		align-items: center;
+		width: 100%;
+		text-align: left;
+		padding: 11px 10px;
+		border-radius: 8px;
+		background: none;
+		border: none;
+		cursor: pointer;
+		font-family: inherit;
+		gap: 8px;
+	}
+
+	.picker-item:hover {
+		background-color: color-mix(in srgb, var(--color-accent) 12%, transparent);
+	}
+
+	.picker-item-name {
+		flex: 1;
+		font-size: 0.95rem;
+		color: var(--color-text-primary);
+	}
+
+	.picker-item-count {
+		font-size: 0.8rem;
+		color: var(--color-text-muted);
+	}
+
+	.picker-empty,
+	.picker-error {
+		text-align: center;
+		padding: 20px;
+		font-size: 0.9rem;
+		color: var(--color-text-muted);
+	}
+
+	.picker-error {
+		color: var(--color-danger);
+	}
+</style>

frontend/src/routes/files/+page.svelte

@@ -15,9 +15,10 @@
 	import { selectionStore, selectionActive } from '$lib/stores/selection';
 	import ConfirmDialog from '$lib/components/common/ConfirmDialog.svelte';
 	import BulkTagEditor from '$lib/components/file/BulkTagEditor.svelte';
+	import PoolPicker from '$lib/components/file/PoolPicker.svelte';
 	import { tick, flushSync } from 'svelte';
 	import { parseDslFilter } from '$lib/utils/dsl';
-	import type { File, FileCursorPage, Pool, PoolOffsetPage } from '$lib/api/types';
+	import type { File, FileCursorPage } from '$lib/api/types';
 	import { appSettings } from '$lib/stores/appSettings';
 
 	// What the section cache stores for the Files grid. `resetKey` guards against
@@ -207,44 +208,14 @@
 	}
 
 	// ---- Add to pool picker ----
+	// The picker itself (load, search, add) lives in PoolPicker; here we just
+	// gate it open and clear the selection once files land in a pool.
 	let poolPickerOpen = $state(false);
-	let pools = $state<Pool[]>([]);
-	let poolsLoading = $state(false);
-	let poolPickerSearch = $state('');
-	let poolPickerError = $state('');
 
-	async function openPoolPicker() {
+	function openPoolPicker() {
 		poolPickerOpen = true;
-		poolPickerError = '';
-		poolsLoading = true;
-		poolPickerSearch = '';
-		try {
-			const res = await api.get<PoolOffsetPage>('/pools?limit=200&sort=name&order=asc');
-			pools = res.items ?? [];
-		} catch {
-			poolPickerError = 'Failed to load pools';
-		} finally {
-			poolsLoading = false;
-		}
 	}
 
-	async function addToPool(poolId: string) {
-		const ids = [...$selectionStore.ids];
-		poolPickerOpen = false;
-		selectionStore.exit();
-		try {
-			await api.post(`/pools/${poolId}/files`, { file_ids: ids });
-		} catch {
-			// silently ignore
-		}
-	}
-
-	let filteredPools = $derived(
-		poolPickerSearch.trim()
-			? pools.filter((p) => p.name?.toLowerCase().includes(poolPickerSearch.toLowerCase()))
-			: pools
-	);
-
 	function handleUploaded(file: File) {
 		files = [file, ...files];
 	}
@@ -904,52 +875,11 @@
 {/if}
 
 {#if poolPickerOpen}
-	<!-- svelte-ignore a11y_click_events_have_key_events -->
+	<PoolPicker
-	<div class="picker-backdrop" role="presentation" onclick={() => (poolPickerOpen = false)}></div>
+		fileIds={[...$selectionStore.ids]}
-	<div class="picker-sheet" role="dialog" aria-label="Add to pool">
+		onAdded={() => selectionStore.exit()}
-		<div class="picker-header">
+		onClose={() => (poolPickerOpen = false)}
-			<span class="picker-title"
+	/>
-				>Add {$selectionStore.ids.size} file{$selectionStore.ids.size !== 1 ? 's' : ''} to pool</span
-			>
-			<button class="picker-close" onclick={() => (poolPickerOpen = false)} aria-label="Close">
-				<svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true">
-					<path
-						d="M3 3l10 10M13 3L3 13"
-						stroke="currentColor"
-						stroke-width="1.8"
-						stroke-linecap="round"
-					/>
-				</svg>
-			</button>
-		</div>
-		<div class="picker-search-wrap">
-			<input
-				class="picker-search"
-				type="search"
-				placeholder="Search pools…"
-				bind:value={poolPickerSearch}
-				autocomplete="off"
-			/>
-		</div>
-		{#if poolPickerError}
-			<p class="picker-error">{poolPickerError}</p>
-		{:else if poolsLoading}
-			<p class="picker-empty">Loading…</p>
-		{:else if filteredPools.length === 0}
-			<p class="picker-empty">No pools found.</p>
-		{:else}
-			<ul class="picker-list">
-				{#each filteredPools as pool (pool.id)}
-					<li>
-						<button class="picker-item" onclick={() => pool.id && addToPool(pool.id)}>
-							<span class="picker-item-name">{pool.name}</span>
-							<span class="picker-item-count">{pool.file_count ?? 0} files</span>
-						</button>
-					</li>
-				{/each}
-			</ul>
-		{/if}
-	</div>
 {/if}
 
 {#if confirmDeleteFiles}
@@ -1035,7 +965,7 @@
 		flex: 1;
 	}
 
-	/* ---- Pool picker ---- */
+	/* ---- Bottom-sheet shell (shared by the tag editor sheet) ---- */
 	.picker-backdrop {
 		position: fixed;
 		inset: 0;
@@ -1095,75 +1025,4 @@
 	.picker-close:hover {
 		color: var(--color-text-primary);
 	}
-
-	.picker-search-wrap {
-		padding: 0 14px 10px;
-	}
-
-	.picker-search {
-		width: 100%;
-		box-sizing: border-box;
-		height: 34px;
-		padding: 0 10px;
-		border-radius: 8px;
-		border: 1px solid color-mix(in srgb, var(--color-accent) 30%, transparent);
-		background-color: var(--color-bg-elevated);
-		color: var(--color-text-primary);
-		font-size: 0.9rem;
-		font-family: inherit;
-		outline: none;
-	}
-
-	.picker-search:focus {
-		border-color: var(--color-accent);
-	}
-
-	.picker-list {
-		list-style: none;
-		margin: 0;
-		padding: 0 8px 12px;
-		overflow-y: auto;
-		flex: 1;
-	}
-
-	.picker-item {
-		display: flex;
-		align-items: center;
-		width: 100%;
-		text-align: left;
-		padding: 11px 10px;
-		border-radius: 8px;
-		background: none;
-		border: none;
-		cursor: pointer;
-		font-family: inherit;
-		gap: 8px;
-	}
-
-	.picker-item:hover {
-		background-color: color-mix(in srgb, var(--color-accent) 12%, transparent);
-	}
-
-	.picker-item-name {
-		flex: 1;
-		font-size: 0.95rem;
-		color: var(--color-text-primary);
-	}
-
-	.picker-item-count {
-		font-size: 0.8rem;
-		color: var(--color-text-muted);
-	}
-
-	.picker-empty,
-	.picker-error {
-		text-align: center;
-		padding: 20px;
-		font-size: 0.9rem;
-		color: var(--color-text-muted);
-	}
-
-	.picker-error {
-		color: var(--color-danger);
-	}
 </style>