feat(preview): inline split-pane preview + sidebar metadata pass

Replace the fullscreen PreviewOverlay with an inline top pane above
each grid surface. SplitGrid + InlinePreview render the focused
photo/video inside the host page; a resizableVertical action drives
the divider and the height persists via the view store. Applied to
the timeline, /tags drill-in, /review cause tabs, /photo/[uid], and
/map. selection.focused is now the single source of truth for both
the inline pane and the right sidebar — preview.svelte store and
PreviewOverlay are removed.

Sidebar: drop the thumb; lead with icon-led filename and folder
rows that match the date/place rhythm. Move dims+size to the top
(below date) and camera/lens/exposure into the collapsible File
section. Read-only spans share the input padding so the text column
aligns across rows. Folder row sits between date and dims+size.

VideoPlayer: stop forcing width/height: 100% so videos honour their
intrinsic aspect ratio inside the pane. Key the player on file hash
in InlinePreview so navigating between videos remounts the element
and autoplay fires again.

Sidebar (LeftSidebar): switch the labels badge to a dedicated
countPhotos('label:*') query so it reports photos with a label
rather than PhotoPrism's category roll-up.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web/src/lib/actions/gridKeyNav.ts

@@ -12,7 +12,6 @@ import {
 } from '$lib/services/photoprism';
 import { queryClient } from '$lib/queryClient';
 import { filters } from '$lib/stores/filters.svelte';
-import { closePreview, openPreview, preview } from '$lib/stores/preview.svelte';
 import {
 	clearSelection,
 	focusAfter,
@@ -55,16 +54,14 @@ export interface GridKeyNavParams {
  *  - Window-level shortcuts mirroring mule-image's keyboard layer:
  *    x archive-toggle, u restore, s + (1–9) add to
  *    heap N (bare s adds to the currently-viewed heap), b/Tab toggles
- *    left sidebar, i toggles right sidebar, space/enter opens preview,
- *    esc clears, ⌘Z undoes, ⌘A selects all visible.
+ *    left sidebar, i toggles right sidebar, esc clears, ⌘Z undoes,
+ *    ⌘A selects all visible.
  *  Rating + color labels are mouse-driven via the metadata sidebar — no
  *  keyboard shortcuts.
  *
  * Archive / restore target a synthesized "cull target list" — in priority:
- *   1. preview overlay uid (when open) — applies to the visible preview
- *      photo even if the grid still shows a stale selection
- *   2. multi-selection set
- *   3. focused tile
+ *   1. multi-selection set
+ *   2. focused tile
  */
 export function gridKeyNav(node: HTMLElement, params: GridKeyNavParams = {}) {
 	let scrollToIndex = params.scrollToIndex;
@@ -151,9 +148,8 @@ export function gridKeyNav(node: HTMLElement, params: GridKeyNavParams = {}) {
 		}
 	}
 
-	/** Synthesize a target list. Preview wins, then multi, then focused. */
+	/** Synthesize a target list. Multi-selection wins, then focused. */
 	function cullTargets(): string[] {
-		if (preview.uid) return [preview.uid];
 		if (selection.ids.size > 0) return Array.from(selection.ids);
 		if (selection.focused) return [selection.focused];
 		return [];
@@ -376,17 +372,6 @@ export function gridKeyNav(node: HTMLElement, params: GridKeyNavParams = {}) {
 		await addCullTargetsToHeap(heap);
 	}
 
-	function openPreviewFromGrid() {
-		const id = selection.focused ?? selection.order[0];
-		if (!id) return;
-		openPreview(id, selection.order);
-	}
-
-	function togglePreview() {
-		if (preview.uid) closePreview();
-		else openPreviewFromGrid();
-	}
-
 	async function onKey(e: KeyboardEvent) {
 		// Don't hijack typing inside form fields.
 		const tag = (e.target as HTMLElement | null)?.tagName?.toLowerCase();
@@ -408,47 +393,35 @@ export function gridKeyNav(node: HTMLElement, params: GridKeyNavParams = {}) {
 
 		const meta = e.metaKey || e.ctrlKey;
 		const shift = e.shiftKey;
-		const inPreview = preview.uid !== null;
 
-		// ── Grid-only nav keys (preview owns its own Arrow/Esc) ──────────────
-		if (!inPreview) {
-			switch (e.key) {
-				case 'ArrowLeft':
-				case 'ArrowRight':
-				case 'ArrowUp':
-				case 'ArrowDown':
-					e.preventDefault();
-					if (onArrow) {
-						// Host owns the visual-row map (needed for grids with
-						// interleaved headers). The host calls setFocused +
-						// scrollToIndex + selectRange-on-shift itself.
-						onArrow(e.key, shift);
-					} else {
-						const delta =
-							e.key === 'ArrowLeft'
-								? -1
-								: e.key === 'ArrowRight'
-									? 1
-									: e.key === 'ArrowUp'
-										? -tilesPerRow()
-										: tilesPerRow();
-						moveFocus(delta, shift);
-						if (shift && selection.focused) selectRange(selection.focused);
-					}
-					return;
-				case 'Escape':
-					clearSelection();
-					setFocused(null);
-					return;
-			}
-		}
-
-		// ── Mode-aware shortcuts (work in grid AND preview) ──────────────────
+		// ── Grid nav keys ────────────────────────────────────────────────────
 		switch (e.key) {
-			case ' ':
-			case 'Enter':
+			case 'ArrowLeft':
+			case 'ArrowRight':
+			case 'ArrowUp':
+			case 'ArrowDown':
 				e.preventDefault();
-				togglePreview();
+				if (onArrow) {
+					// Host owns the visual-row map (needed for grids with
+					// interleaved headers). The host calls setFocused +
+					// scrollToIndex + selectRange-on-shift itself.
+					onArrow(e.key, shift);
+				} else {
+					const delta =
+						e.key === 'ArrowLeft'
+							? -1
+							: e.key === 'ArrowRight'
+								? 1
+								: e.key === 'ArrowUp'
+									? -tilesPerRow()
+									: tilesPerRow();
+					moveFocus(delta, shift);
+					if (shift && selection.focused) selectRange(selection.focused);
+				}
+				return;
+			case 'Escape':
+				clearSelection();
+				setFocused(null);
 				return;
 			case 'Tab':
 				// Tab in the grid context = mule-image's left-sidebar toggle.
@@ -459,7 +432,7 @@ export function gridKeyNav(node: HTMLElement, params: GridKeyNavParams = {}) {
 				return;
 			case 'i':
 			case 'I':
-				if (!meta && !shift && !inPreview) {
+				if (!meta && !shift) {
 					e.preventDefault();
 					toggleRightSidebar();
 				}
@@ -482,7 +455,7 @@ export function gridKeyNav(node: HTMLElement, params: GridKeyNavParams = {}) {
 				return;
 			case 'a':
 			case 'A':
-				if (meta && !inPreview) {
+				if (meta) {
 					e.preventDefault();
 					for (const id of selection.order) selection.ids.add(id);
 				}
@@ -560,8 +533,7 @@ export function gridKeyNav(node: HTMLElement, params: GridKeyNavParams = {}) {
 	node.addEventListener('click', onClick);
 	// Keydown lives on the window so arrow keys, Esc, ⌘Z, etc. work
 	// immediately on page load regardless of which element holds focus.
-	// The filters inside `onKey` keep form-field typing and preview mode
-	// safe (preview owns its own Arrow/Esc).
+	// The filter inside `onKey` keeps form-field typing safe.
 	window.addEventListener('keydown', onKey);
 
 	return {

web/src/lib/actions/resizableVertical.ts

@@ -0,0 +1,75 @@
+/**
+ * Drag-to-resize Svelte action for vertical splits. Sibling of `resizable`
+ * (which handles left/right edges); kept as its own file so each action's
+ * surface stays small and the call sites read obviously.
+ *
+ *   edge: 'bottom' — handle on the bottom edge of the pane; drag down enlarges
+ *   edge: 'top'    — handle on the top    edge of the pane; drag up   enlarges
+ *
+ * Usage (handle on the bottom edge of the top preview pane):
+ *   <div use:resizableVertical={{ edge: 'bottom',
+ *                                 getHeight: () => view.previewPaneHeight,
+ *                                 setHeight: setPreviewPaneHeight }} />
+ */
+export interface ResizableVerticalParams {
+	edge: 'top' | 'bottom';
+	getHeight: () => number;
+	setHeight: (px: number) => void;
+}
+
+export function resizableVertical(node: HTMLElement, initial: ResizableVerticalParams) {
+	let params = initial;
+	let pointerId = -1;
+	let startY = 0;
+	let startHeight = 0;
+
+	function onDown(e: PointerEvent) {
+		if (e.button !== 0) return;
+		pointerId = e.pointerId;
+		startY = e.clientY;
+		startHeight = params.getHeight();
+		node.setPointerCapture(pointerId);
+		document.body.style.cursor = 'row-resize';
+		document.body.style.userSelect = 'none';
+		node.addEventListener('pointermove', onMove);
+		node.addEventListener('pointerup', onUp);
+		node.addEventListener('pointercancel', onUp);
+	}
+
+	function onMove(e: PointerEvent) {
+		if (e.pointerId !== pointerId) return;
+		const dy = e.clientY - startY;
+		// `edge: 'bottom'` — handle on the bottom edge of the controlled pane,
+		// drag down grows it.  `edge: 'top'` — handle on the top edge of the
+		// controlled pane (i.e. the pane is below the handle), drag up grows
+		// it, so the delta is inverted. Mirrors the horizontal action.
+		const delta = params.edge === 'bottom' ? dy : -dy;
+		params.setHeight(startHeight + delta);
+	}
+
+	function onUp(e: PointerEvent) {
+		if (pointerId === -1) return;
+		try {
+			node.releasePointerCapture(pointerId);
+		} catch {
+			// Pointer may already be released; ignore.
+		}
+		pointerId = -1;
+		document.body.style.cursor = '';
+		document.body.style.userSelect = '';
+		node.removeEventListener('pointermove', onMove);
+		node.removeEventListener('pointerup', onUp);
+		node.removeEventListener('pointercancel', onUp);
+	}
+
+	node.addEventListener('pointerdown', onDown);
+
+	return {
+		update(next: ResizableVerticalParams) {
+			params = next;
+		},
+		destroy() {
+			node.removeEventListener('pointerdown', onDown);
+		}
+	};
+}

web/src/lib/components/layout/LeftSidebar.svelte

@@ -126,7 +126,7 @@
 		}));
 	}
 
-	// One query per badge. Admins with no BasePath skip all of these
+	// One query per badge. Admins with no BasePath skip these
 	// (enabled:false via `wantScoped`) and the configQuery numbers are
 	// used directly — same chrome as before that fix, no extra
 	// round-trips.
@@ -134,10 +134,20 @@
 	const reviewCountQuery = scopedCountQuery('review', 'review:true');
 	const hiddenCountQuery = scopedCountQuery('hidden', 'hidden:true');
 	const archivedCountQuery = scopedCountQuery('archived', 'archived:true');
-	const labelsCountQuery = scopedCountQuery('labels', 'all:true label:*');
+	// Labels is special: `configQuery.count.labels` is the number of distinct
+	// label categories (PhotoPrism's roll-up), not the number of photos that
+	// carry a label. The Tags surface wants picture counts everywhere, so we
+	// always run a `countPhotos('label:*')` query regardless of the admin/
+	// BasePath shape and never fall back to the category-count.
+	const labelsCountQuery = createQuery<number>(() => ({
+		queryKey: ['photos', 'scoped-count', 'labels', userBasePath(), isAdminUser],
+		queryFn: () => countPhotos(scoped('all:true label:*')),
+		enabled: isAuthenticated(),
+		staleTime: 60_000
+	}));
 
 	function bucketCount(
-		key: 'favorites' | 'review' | 'hidden' | 'archived' | 'labels',
+		key: 'favorites' | 'review' | 'hidden' | 'archived',
 		query: { data: number | undefined; isPending: boolean }
 	): number | undefined {
 		if (wantScoped) {
@@ -148,7 +158,6 @@
 		// (no extra round-trip).
 		const c = configQuery.data?.count;
 		if (!c) return undefined;
-		if (key === 'labels') return c.labels;
 		return c[key];
 	}
 
@@ -286,7 +295,9 @@
 	const reviewBadge = $derived(bucketCount('review', reviewCountQuery));
 	const hiddenBadge = $derived(bucketCount('hidden', hiddenCountQuery));
 	const archivedBadge = $derived(bucketCount('archived', archivedCountQuery));
-	const labelsBadge = $derived(bucketCount('labels', labelsCountQuery));
+	const labelsBadge = $derived<number | undefined>(
+		labelsCountQuery.isPending ? undefined : labelsCountQuery.data
+	);
 
 	const createMut = createMutation(() => ({
 		mutationFn: (title: string) => createHeap(title),

web/src/lib/components/mule/AnimatedMule.svelte

@@ -9,91 +9,99 @@
 	necessary here.
 -->
 <script lang="ts">
-	const MULIMAGO_ASCII = `▖  ▖  ▜ ▘
+  const MULIMAGO_ASCII = `▖  ▖  ▜ ▘
 ▛▖▞▌▌▌▐ ▌▛▛▌▀▌▛▌█▌
 ▌▝ ▌▙▌▐▖▌▌▌▌█▌▙▌▙▖`;
 
-	interface Props {
-		children?: import('svelte').Snippet;
-	}
-	let { children }: Props = $props();
+  interface Props {
+    children?: import("svelte").Snippet;
+  }
+  let { children }: Props = $props();
 </script>
 
-<header class="mule-header relative flex h-16 items-center justify-between overflow-hidden border-b border-border px-4">
-	<div class="relative flex items-center gap-3">
-		<div class="mule-sprite h-12 w-14" aria-label="Mulimago" role="img"></div>
-		<pre
-			aria-label="Mulimago"
-			class="rounded bg-black px-2 py-1 font-mono text-[8px] leading-[1.05] text-white"
-			style="letter-spacing: 0;"
-		>{MULIMAGO_ASCII}</pre>
-	</div>
+<header
+  class="mule-header relative flex h-14 items-center justify-between overflow-hidden border-b border-border px-4"
+>
+  <div class="relative flex items-center gap-3">
+    <div class="mule-sprite h-12 w-14" aria-label="Mulimago" role="img"></div>
+    <pre
+      aria-label="Mulimago"
+      class="rounded bg-black px-2 py-1 font-mono text-[8px] leading-[1.05] text-white"
+      style="letter-spacing: 0;">{MULIMAGO_ASCII}</pre>
+  </div>
 
-	<div class="relative flex items-center gap-3">
-		{@render children?.()}
-	</div>
+  <div class="relative flex items-center gap-3">
+    {@render children?.()}
+  </div>
 </header>
 
 <style>
-	/*
+  /*
 	 * Two layers in the background: tiled desert.png on top scrolling
 	 * right→left, dusk-sky gradient underneath. The 200px tile width is
 	 * fixed so the `desert-scroll` keyframe moves by exactly one tile and
 	 * loops seamlessly.
 	 */
-	.mule-header {
-		background-image:
-			url('/mule/desert.png'),
-			linear-gradient(to bottom, #2b3a5c 0%, #6b6b8a 35%, #d68a5c 75%, #f0c188 100%);
-		background-repeat: repeat-x, no-repeat;
-		background-size:
-			200px 100%,
-			100% 100%;
-		background-position: 0 bottom, 0 0;
-		image-rendering: pixelated;
-		animation: desert-scroll 24s linear infinite;
-	}
+  .mule-header {
+    background-image: url("/mule/desert.png"),
+      linear-gradient(
+        to bottom,
+        #2b3a5c 0%,
+        #6b6b8a 35%,
+        #d68a5c 75%,
+        #f0c188 100%
+      );
+    background-repeat: repeat-x, no-repeat;
+    background-size:
+      200px 100%,
+      100% 100%;
+    background-position:
+      0 bottom,
+      0 0;
+    image-rendering: pixelated;
+    animation: desert-scroll 24s linear infinite;
+  }
 
-	/* 3×2 sprite-sheet, 6-frame walk cycle. `steps(1)` makes each keyframe
+  /* 3×2 sprite-sheet, 6-frame walk cycle. `steps(1)` makes each keyframe
 	 * snap (no interpolation between frames). */
-	.mule-sprite {
-		background-image: url('/mule/mule-sprites.png');
-		background-size: 300% 200%;
-		background-repeat: no-repeat;
-		image-rendering: pixelated;
-		animation: mule-walk 0.6s steps(1) infinite;
-	}
+  .mule-sprite {
+    background-image: url("/mule/mule-sprites.png");
+    background-size: 300% 200%;
+    background-repeat: no-repeat;
+    image-rendering: pixelated;
+    animation: mule-walk 0.6s steps(1) infinite;
+  }
 
-	@keyframes mule-walk {
-		0% {
-			background-position: 0% 0%;
-		}
-		16.66% {
-			background-position: 50% 0%;
-		}
-		33.33% {
-			background-position: 100% 0%;
-		}
-		50% {
-			background-position: 0% 100%;
-		}
-		66.66% {
-			background-position: 50% 100%;
-		}
-		83.33% {
-			background-position: 100% 100%;
-		}
-		100% {
-			background-position: 0% 0%;
-		}
-	}
+  @keyframes mule-walk {
+    0% {
+      background-position: 0% 0%;
+    }
+    16.66% {
+      background-position: 50% 0%;
+    }
+    33.33% {
+      background-position: 100% 0%;
+    }
+    50% {
+      background-position: 0% 100%;
+    }
+    66.66% {
+      background-position: 50% 100%;
+    }
+    83.33% {
+      background-position: 100% 100%;
+    }
+    100% {
+      background-position: 0% 0%;
+    }
+  }
 
-	@keyframes desert-scroll {
-		from {
-			background-position-x: 0px, 0px;
-		}
-		to {
-			background-position-x: -200px, 0px;
-		}
-	}
+  @keyframes desert-scroll {
+    from {
+      background-position-x: 0px, 0px;
+    }
+    to {
+      background-position-x: -200px, 0px;
+    }
+  }
 </style>

web/src/lib/components/preview/InlinePreview.svelte

@@ -0,0 +1,89 @@
+<!--
+	Inline preview pane: replaces the old fullscreen `PreviewOverlay`.
+	Renders the focused photo or video inside its host pane so the grid
+	stays visible below. Prev/next move `selection.focused` directly so
+	the right metadata sidebar tracks in lockstep.
+-->
+<script lang="ts">
+	import { createQuery } from '@tanstack/svelte-query';
+	import { getPhoto } from '$lib/services/photoprism';
+	import { thumbUrl, videoUrl } from '$lib/stores/session.svelte';
+	import { setAnchor, setFocused } from '$lib/stores/selection.svelte';
+	import VideoPlayer from '$lib/components/preview/VideoPlayer.svelte';
+	import { isVideo, primaryFile, videoFile, type PpPhoto } from '$lib/types/photoprism';
+
+	interface Props {
+		uid: string | null;
+		/** Ordered uid list for prev/next chevrons. The host page mirrors
+		 *  whatever list the user is currently looking at into this prop so
+		 *  navigation stays in context (timeline order, drill-in order, etc). */
+		order: string[];
+	}
+	let { uid, order }: Props = $props();
+
+	const photoQuery = createQuery<PpPhoto>(() => ({
+		queryKey: ['photo', uid ?? ''],
+		queryFn: () => getPhoto(uid as string),
+		enabled: Boolean(uid)
+	}));
+
+	const currentIndex = $derived(uid ? order.indexOf(uid) : -1);
+
+	function focusAt(i: number) {
+		const next = order[i];
+		if (!next) return;
+		setFocused(next);
+		setAnchor(next);
+	}
+</script>
+
+<div class="relative flex h-full w-full items-center justify-center bg-black/30 p-4">
+	{#if uid === null}
+		<p class="text-sm text-muted-foreground">Select a photo to preview.</p>
+	{:else if photoQuery.isPending}
+		<p class="text-sm text-muted-foreground">Loading…</p>
+	{:else if photoQuery.isError}
+		<p class="text-sm text-destructive">Failed to load photo.</p>
+	{:else if photoQuery.data}
+		{@const pf = primaryFile(photoQuery.data)}
+		{#if currentIndex > 0}
+			<button
+				class="absolute left-2 top-1/2 z-10 -translate-y-1/2 rounded-full bg-background/80 px-3 py-2 text-lg hover:bg-background"
+				onclick={() => focusAt(currentIndex - 1)}
+				aria-label="Previous photo"
+			>
+				‹
+			</button>
+		{/if}
+		{#if currentIndex >= 0 && currentIndex < order.length - 1}
+			<button
+				class="absolute right-2 top-1/2 z-10 -translate-y-1/2 rounded-full bg-background/80 px-3 py-2 text-lg hover:bg-background"
+				onclick={() => focusAt(currentIndex + 1)}
+				aria-label="Next photo"
+			>
+				›
+			</button>
+		{/if}
+
+		{#if isVideo(photoQuery.data)}
+			{@const vf = videoFile(photoQuery.data)}
+			<!-- Key on the video hash so navigating to a new video remounts the
+			     player. Without this the <media-player> element keeps the
+			     previous src bound and `autoplay` doesn't re-fire — clicking
+			     a video tile would leave the pane idle on its poster. -->
+			{#key vf.Hash}
+				<VideoPlayer
+					src={videoUrl(vf.Hash)}
+					poster={thumbUrl(pf.Hash, 'fit_1920')}
+					title={photoQuery.data.OriginalName ?? pf.Name ?? ''}
+				/>
+			{/key}
+		{:else}
+			<img
+				src={thumbUrl(pf.Hash, 'fit_1920')}
+				alt={photoQuery.data.OriginalName ?? pf.Name ?? 'Photo'}
+				class="max-h-full max-w-full rounded-md object-contain shadow-2xl"
+			/>
+		{/if}
+	{/if}
+</div>

web/src/lib/components/preview/PreviewOverlay.svelte

@@ -1,161 +0,0 @@
-<script lang="ts">
-	import { createQuery } from '@tanstack/svelte-query';
-	import { getPhoto } from '$lib/services/photoprism';
-	import {
-		closePreview,
-		preview,
-		previewNext,
-		previewPrev
-	} from '$lib/stores/preview.svelte';
-	import { thumbUrl, videoUrl } from '$lib/stores/session.svelte';
-	import { setFocused } from '$lib/stores/selection.svelte';
-	import RightSidebar from '$lib/components/sidebar/RightSidebar.svelte';
-	import VideoPlayer from '$lib/components/preview/VideoPlayer.svelte';
-	import { isVideo, primaryFile, videoFile, type PpPhoto } from '$lib/types/photoprism';
-
-	const photoQuery = createQuery<PpPhoto>(() => ({
-		queryKey: ['photo', preview.uid ?? ''],
-		queryFn: () => getPhoto(preview.uid as string),
-		enabled: Boolean(preview.uid)
-	}));
-
-	// Mirror the currently-shown photo into selection.focused. The
-	// timeline's tile uses `selection.focused === photo.UID` to draw the
-	// blue ring, so this keeps the selection in lockstep with whatever
-	// the user is paging through in preview. The host page (+page.svelte)
-	// owns the matching scroll-into-view on close so the tile actually
-	// mounts (it can be windowed out if the user navigated far).
-	$effect(() => {
-		if (preview.uid !== null) setFocused(preview.uid);
-	});
-
-	// Keyboard handling lives at the document level so it works regardless
-	// of focus location. Form fields inside the sidebar still keep their
-	// own arrow-key behaviour because we ignore events whose target is an
-	// input/textarea.
-	$effect(() => {
-		function onKey(e: KeyboardEvent) {
-			if (preview.uid === null) return;
-			const tag = (e.target as HTMLElement | null)?.tagName?.toLowerCase();
-			const inField = tag === 'input' || tag === 'textarea' || tag === 'select';
-			switch (e.key) {
-				case 'Escape':
-					e.preventDefault();
-					closePreview();
-					break;
-				case 'ArrowLeft':
-					if (inField) return;
-					e.preventDefault();
-					previewPrev();
-					break;
-				case 'ArrowRight':
-					if (inField) return;
-					e.preventDefault();
-					previewNext();
-					break;
-			}
-		}
-		window.addEventListener('keydown', onKey);
-		return () => window.removeEventListener('keydown', onKey);
-	});
-
-	// Prevent body scroll while the overlay is up.
-	$effect(() => {
-		if (typeof document === 'undefined') return;
-		const prev = document.body.style.overflow;
-		if (preview.uid !== null) document.body.style.overflow = 'hidden';
-		return () => {
-			document.body.style.overflow = prev;
-		};
-	});
-
-	function onBackdrop(e: MouseEvent) {
-		// Clicking the dimmed area (but not the image or sidebar) closes.
-		if (e.target === e.currentTarget) closePreview();
-	}
-
-	const currentIndex = $derived(
-		preview.uid ? preview.order.indexOf(preview.uid) : -1
-	);
-</script>
-
-{#if preview.uid !== null}
-	<div
-		class="fixed inset-0 z-50 flex bg-black/80 backdrop-blur-sm"
-		role="dialog"
-		aria-modal="true"
-		aria-label="Photo preview"
-		onclick={onBackdrop}
-		onkeydown={(e) => {
-			if (e.key === 'Escape') closePreview();
-		}}
-		tabindex="-1"
-	>
-		<!-- Left: image area -->
-		<div
-			class="relative flex flex-1 items-center justify-center p-6"
-			onclick={onBackdrop}
-			role="presentation"
-		>
-			<button
-				class="absolute left-4 top-4 z-10 rounded-md bg-background/80 px-2.5 py-1.5 text-xs hover:bg-background"
-				onclick={closePreview}
-				aria-label="Close preview"
-			>
-				✕ Close
-			</button>
-
-			{#if currentIndex > 0}
-				<button
-					class="absolute left-2 z-10 rounded-full bg-background/80 px-3 py-2 text-lg hover:bg-background"
-					onclick={previewPrev}
-					aria-label="Previous photo"
-				>
-					‹
-				</button>
-			{/if}
-			{#if currentIndex >= 0 && currentIndex < preview.order.length - 1}
-				<button
-					class="absolute right-2 z-10 rounded-full bg-background/80 px-3 py-2 text-lg hover:bg-background"
-					onclick={previewNext}
-					aria-label="Next photo"
-				>
-					›
-				</button>
-			{/if}
-
-			{#if photoQuery.isPending}
-				<p class="text-sm text-white/80">Loading…</p>
-			{:else if photoQuery.isError}
-				<p class="text-sm text-red-300">Failed to load photo.</p>
-			{:else if photoQuery.data}
-				{@const pf = primaryFile(photoQuery.data)}
-				{#if isVideo(photoQuery.data)}
-					{@const vf = videoFile(photoQuery.data)}
-					<VideoPlayer
-						src={videoUrl(vf.Hash)}
-						poster={thumbUrl(pf.Hash, 'fit_1920')}
-						title={photoQuery.data.OriginalName ?? pf.Name ?? ''}
-					/>
-				{:else}
-					<img
-						src={thumbUrl(pf.Hash, 'fit_1920')}
-						alt={photoQuery.data.OriginalName ?? pf.Name ?? 'Photo'}
-						class="max-h-full max-w-full rounded-md object-contain shadow-2xl"
-					/>
-				{/if}
-			{/if}
-		</div>
-
-		<!-- Right: metadata sidebar -->
-		<aside
-			class="w-[360px] shrink-0 overflow-y-auto border-l border-border bg-background p-4"
-		>
-			{#if photoQuery.data}
-				<RightSidebar photo={photoQuery.data} />
-			{:else}
-				<p class="text-sm text-muted-foreground">Loading metadata…</p>
-			{/if}
-		</aside>
-	</div>
-{/if}

web/src/lib/components/preview/SplitGrid.svelte

@@ -0,0 +1,59 @@
+<!--
+	Vertical split layout: a top pane (preview) sized by
+	`view.previewPaneHeight`, a draggable divider, and a flex-1 bottom
+	pane (the grid). Mirrors the horizontal sidebar resize pattern.
+
+	Usage:
+		<SplitGrid>
+			{#snippet preview()}
+				<InlinePreview uid={selection.focused} order={selection.order} />
+			{/snippet}
+			{#snippet grid()}
+				<main>…</main>
+			{/snippet}
+		</SplitGrid>
+-->
+<script lang="ts">
+	import type { Snippet } from 'svelte';
+	import { resizableVertical } from '$lib/actions/resizableVertical';
+	import { setPreviewPaneHeight, view } from '$lib/stores/view.svelte';
+
+	interface Props {
+		preview: Snippet;
+		grid: Snippet;
+	}
+	let { preview, grid }: Props = $props();
+</script>
+
+<div class="flex min-h-0 flex-1 flex-col">
+	<!-- Top: preview pane. Fixed pixel height controlled by the divider;
+	     overflow-hidden so videos / images can't push the divider off-screen. -->
+	<div
+		class="relative shrink-0 overflow-hidden border-b border-border"
+		style="height: {view.previewPaneHeight}px;"
+	>
+		{@render preview()}
+		<!-- Divider sits on the bottom edge of the preview pane.
+		     `edge: 'bottom'` matches the convention: positive dy = pane grows. -->
+		<div
+			class="group absolute -bottom-1.5 left-0 z-20 h-3 w-full cursor-row-resize"
+			use:resizableVertical={{
+				edge: 'bottom',
+				getHeight: () => view.previewPaneHeight,
+				setHeight: setPreviewPaneHeight
+			}}
+			role="separator"
+			aria-orientation="horizontal"
+			aria-label="Resize preview pane"
+		>
+			<div
+				class="mt-1 h-0.5 w-full bg-transparent transition-colors group-hover:bg-primary/40"
+			></div>
+		</div>
+	</div>
+
+	<!-- Bottom: grid container; the caller's snippet handles its own scroll. -->
+	<div class="flex min-h-0 flex-1 flex-col overflow-hidden">
+		{@render grid()}
+	</div>
+</div>

web/src/lib/components/preview/VideoPlayer.svelte

@@ -77,11 +77,21 @@
 
 <style>
 	:global(.vds-player) {
-		width: 100%;
-		height: 100%;
+		/* Let the player size to the video's intrinsic aspect ratio,
+		   capped by the host pane. Don't set width/height to 100% — that
+		   was stretching widescreen video into the square inline-preview
+		   pane. The default vidstack layout reads the loaded media's
+		   aspect and sizes the box accordingly; we just clamp the upper
+		   bound so it can't escape the SplitGrid top pane. */
+		max-width: 100%;
 		max-height: 100%;
-		aspect-ratio: auto;
 		--media-brand: #3b82f6;
 		--media-focus-ring-color: #3b82f6;
 	}
+	:global(.vds-player video),
+	:global(.vds-player media-provider) {
+		max-width: 100%;
+		max-height: 100%;
+		object-fit: contain;
+	}
 </style>

web/src/lib/components/sidebar/RightSidebar.svelte

@@ -11,8 +11,9 @@
 	import {
 		Aperture,
 		Calendar,
-		Camera,
 		ExternalLink,
+		File,
+		Folder,
 		ImageIcon,
 		Loader2,
 		MapPin,
@@ -34,7 +35,6 @@
 	} from '$lib/services/photoprism';
 	import { isAuthenticated } from '$lib/stores/session.svelte';
 	import { push as pushUndo } from '$lib/stores/undo.svelte';
-	import { thumbUrl } from '$lib/stores/session.svelte';
 	import { getMetadataSectionOpen, setMetadataSection } from '$lib/stores/view.svelte';
 	import { primaryFile, type PpPhoto } from '$lib/types/photoprism';
 	import RelatedStrip from './RelatedStrip.svelte';
@@ -289,27 +289,18 @@
 </script>
 
 <aside class="space-y-2.5 bg-card p-2.5 text-xs">
-	<!-- Header strip — thumb + path (read-only) over editable basename. The
-	     sidecar's rename endpoint only accepts a bare basename and preserves
-	     the directory on disk, so the split UI mirrors that contract. -->
-	<div class="flex items-start gap-2">
-		<img
-			src={thumbUrl(pf.Hash, 'tile_100')}
-			alt=""
-			class="h-10 w-10 shrink-0 rounded object-cover"
-		/>
-		<div class="flex min-w-0 flex-1 flex-col gap-0.5">
-			{#if dirPath}
-				<div
-					class="truncate text-[10px] text-muted-foreground"
-					title={dirPath}
-				>
-					{dirPath}/
-				</div>
-			{/if}
+	<!-- Compact info rows. Filename / folder lead the stack as icon-led
+	     rows so they read in the same rhythm as the date / place / camera
+	     rows below. The sidecar's rename endpoint only accepts a bare
+	     basename and preserves the directory on disk, so the basename row
+	     is editable while the folder row stays read-only. -->
+	<dl class="space-y-1">
+		<!-- Filename (editable) -->
+		<div class="flex items-center gap-2">
+			<File class="h-3.5 w-3.5 shrink-0 text-muted-foreground" />
 			<input
 				type="text"
-				class="min-w-0 rounded border border-transparent bg-transparent px-1 py-0.5 text-xs font-medium leading-snug break-all hover:border-input focus:border-input focus:outline-none focus:ring-1 focus:ring-ring disabled:opacity-50"
+				class="min-w-0 flex-1 rounded border border-transparent bg-transparent px-1 py-0.5 text-xs font-medium hover:border-input focus:border-input focus:outline-none focus:ring-1 focus:ring-ring disabled:opacity-50"
 				bind:value={basename}
 				disabled={renaming}
 				onblur={commitFilename}
@@ -321,16 +312,11 @@
 				}}
 				title={renaming ? 'Renaming…' : 'Click to rename file on disk'}
 			/>
+			{#if renaming}
+				<Loader2 class="h-3 w-3 shrink-0 animate-spin text-muted-foreground" />
+			{/if}
 		</div>
-		<!-- Inline spinner so the user sees the rename in flight without
-		     scanning to the bottom of the sidebar. -->
-		{#if renaming}
-			<Loader2 class="mt-1 h-3 w-3 shrink-0 animate-spin text-muted-foreground" />
-		{/if}
-	</div>
 
-	<!-- Compact info rows -->
-	<dl class="space-y-1">
 		<!-- Taken at -->
 		<div class="flex items-center gap-2">
 			<Calendar class="h-3.5 w-3.5 shrink-0 text-muted-foreground" />
@@ -346,10 +332,31 @@
 			/>
 		</div>
 
+		<!-- Folder (read-only). The `px-1 py-0.5` mirrors the input
+		     padding on filename / date so the read-only text starts at the
+		     same x-offset as the editable rows above — otherwise spans
+		     hug the icon while inputs sit 4px in. -->
+		{#if dirPath}
+			<div class="flex items-center gap-2">
+				<Folder class="h-3.5 w-3.5 shrink-0 text-muted-foreground" />
+				<span class="min-w-0 flex-1 truncate px-1 py-0.5 text-muted-foreground" title={dirPath}>
+					{dirPath}/
+				</span>
+			</div>
+		{/if}
+
+		<!-- Dimensions + file size -->
+		<div class="flex items-center gap-2">
+			<ImageIcon class="h-3.5 w-3.5 shrink-0 text-muted-foreground" />
+			<span class="min-w-0 flex-1 truncate px-1 py-0.5 text-muted-foreground">
+				{dims} · {sizeStr}
+			</span>
+		</div>
+
 		<!-- Location -->
 		<div class="flex items-center gap-2">
 			<MapPin class="h-3.5 w-3.5 shrink-0 text-muted-foreground" />
-			<span class="min-w-0 flex-1 truncate text-muted-foreground">
+			<span class="min-w-0 flex-1 truncate px-1 py-0.5 text-muted-foreground">
 				{placeLabel || 'No location'}
 			</span>
 			{#if mapsHref}
@@ -364,33 +371,6 @@
 				</a>
 			{/if}
 		</div>
-
-		<!-- Camera / lens — only render if something to show -->
-		{#if cameraStr || lensStr || exposureParts.iso || exposureParts.fnum}
-			<div class="flex items-start gap-2">
-				<Camera class="mt-0.5 h-3.5 w-3.5 shrink-0 text-muted-foreground" />
-				<div class="min-w-0 flex-1 space-y-0.5 text-muted-foreground">
-					{#if cameraStr}<div class="truncate">{cameraStr}</div>{/if}
-					{#if lensStr && lensStr !== cameraStr}<div class="truncate">{lensStr}</div>{/if}
-					{#if exposureParts.iso || exposureParts.fnum || exposureParts.focal || exposureParts.exp}
-						<div class="flex flex-wrap gap-x-2 text-[10px]">
-							{#if exposureParts.fnum}
-								<span class="flex items-center gap-0.5">
-									<Aperture class="h-2.5 w-2.5" /> {exposureParts.fnum}
-								</span>
-							{/if}
-							{#if exposureParts.exp}
-								<span class="flex items-center gap-0.5">
-									<Timer class="h-2.5 w-2.5" /> {exposureParts.exp}
-								</span>
-							{/if}
-							{#if exposureParts.iso}<span>{exposureParts.iso}</span>{/if}
-							{#if exposureParts.focal}<span>{exposureParts.focal}</span>{/if}
-						</div>
-					{/if}
-				</div>
-			</div>
-		{/if}
 	</dl>
 
 	<!-- Note (PhotoPrism's Caption field — labelled "Note" to match
@@ -603,8 +583,31 @@
 			</span>
 		</summary>
 		<dl class="grid grid-cols-[auto_1fr] gap-x-2 gap-y-0.5 p-2 pt-1 text-[10px]">
-			<dt class="text-muted-foreground">Size</dt>
-			<dd class="text-foreground/80">{dims} · {sizeStr}</dd>
+			{#if cameraStr}
+				<dt class="text-muted-foreground">Camera</dt>
+				<dd class="text-foreground/80">{cameraStr}</dd>
+			{/if}
+			{#if lensStr && lensStr !== cameraStr}
+				<dt class="text-muted-foreground">Lens</dt>
+				<dd class="text-foreground/80">{lensStr}</dd>
+			{/if}
+			{#if exposureParts.fnum || exposureParts.exp || exposureParts.iso || exposureParts.focal}
+				<dt class="text-muted-foreground">Exposure</dt>
+				<dd class="flex flex-wrap gap-x-2 text-foreground/80">
+					{#if exposureParts.fnum}
+						<span class="flex items-center gap-0.5">
+							<Aperture class="h-2.5 w-2.5" /> {exposureParts.fnum}
+						</span>
+					{/if}
+					{#if exposureParts.exp}
+						<span class="flex items-center gap-0.5">
+							<Timer class="h-2.5 w-2.5" /> {exposureParts.exp}
+						</span>
+					{/if}
+					{#if exposureParts.iso}<span>{exposureParts.iso}</span>{/if}
+					{#if exposureParts.focal}<span>{exposureParts.focal}</span>{/if}
+				</dd>
+			{/if}
 			<dt class="text-muted-foreground">Type</dt>
 			<dd class="text-foreground/80">{pf.FileType ?? photo.Type ?? '—'}</dd>
 			<dt class="text-muted-foreground">Hash</dt>

web/src/lib/components/timeline/PhotoGrid.svelte

@@ -21,7 +21,6 @@
 		setFocused,
 		setOrder
 	} from '$lib/stores/selection.svelte';
-	import { openPreview } from '$lib/stores/preview.svelte';
 	import { view } from '$lib/stores/view.svelte';
 	import { type PpPhoto } from '$lib/types/photoprism';
 	import PhotoTile from './PhotoTile.svelte';
@@ -77,11 +76,17 @@
 	function onDblclick(e: MouseEvent, uid: string) {
 		if (e.shiftKey || e.metaKey || e.ctrlKey) return;
 		e.preventDefault();
-		openPreview(uid, order);
+		selection.ids.clear();
+		selection.ids.add(uid);
+		setFocused(uid);
+		setAnchor(uid);
 	}
 
 	function onOpenPreview(uid: string) {
-		openPreview(uid, order);
+		selection.ids.clear();
+		selection.ids.add(uid);
+		setFocused(uid);
+		setAnchor(uid);
 	}
 </script>
 

web/src/lib/components/timeline/PhotoTile.svelte

@@ -15,56 +15,56 @@
 	                                  not-yet-discovered dblclick gesture)
 -->
 <script lang="ts">
-	import { Maximize2 } from 'lucide-svelte';
-	import { thumbSrc, thumbSrcSet, videoUrl } from '$lib/stores/session.svelte';
-	import { view } from '$lib/stores/view.svelte';
-	import { isVideo, primaryFile, type PpPhoto } from '$lib/types/photoprism';
+  import { Maximize2 } from "lucide-svelte";
+  import { thumbSrc, thumbSrcSet, videoUrl } from "$lib/stores/session.svelte";
+  import { view } from "$lib/stores/view.svelte";
+  import { isVideo, primaryFile, type PpPhoto } from "$lib/types/photoprism";
 
-	interface Props {
-		photo: PpPhoto;
-		selected: boolean;
-		onClick: (e: MouseEvent) => void;
-		onDblclick: (e: MouseEvent) => void;
-		onOpenPreview: () => void;
-	}
-	let { photo, selected, onClick, onDblclick, onOpenPreview }: Props = $props();
+  interface Props {
+    photo: PpPhoto;
+    selected: boolean;
+    onClick: (e: MouseEvent) => void;
+    onDblclick: (e: MouseEvent) => void;
+    onOpenPreview: () => void;
+  }
+  let { photo, selected, onClick, onDblclick, onOpenPreview }: Props = $props();
 
-	const hash = $derived(photo.Hash ?? primaryFile(photo).Hash);
-	const video = $derived(isVideo(photo));
+  const hash = $derived(photo.Hash ?? primaryFile(photo).Hash);
+  const video = $derived(isVideo(photo));
 
-	// Hover preview: PhotoPrism plays a muted, looping preview of the actual
-	// video when you hover the tile in the grid. We wait HOVER_DELAY ms
-	// before mounting the <video> so a cursor skimming across the grid
-	// doesn't kick off N HTTP requests, then we cross-fade in once the
-	// first frame is decoded (videoReady).
-	const HOVER_DELAY = 250;
-	let hoverPlaying = $state(false);
-	let videoReady = $state(false);
-	let hoverTimer: ReturnType<typeof setTimeout> | null = null;
+  // Hover preview: PhotoPrism plays a muted, looping preview of the actual
+  // video when you hover the tile in the grid. We wait HOVER_DELAY ms
+  // before mounting the <video> so a cursor skimming across the grid
+  // doesn't kick off N HTTP requests, then we cross-fade in once the
+  // first frame is decoded (videoReady).
+  const HOVER_DELAY = 250;
+  let hoverPlaying = $state(false);
+  let videoReady = $state(false);
+  let hoverTimer: ReturnType<typeof setTimeout> | null = null;
 
-	function onMouseEnter() {
-		if (!video || selected) return;
-		if (hoverTimer) clearTimeout(hoverTimer);
-		hoverTimer = setTimeout(() => {
-			hoverPlaying = true;
-		}, HOVER_DELAY);
-	}
-	function onMouseLeave() {
-		if (hoverTimer) {
-			clearTimeout(hoverTimer);
-			hoverTimer = null;
-		}
-		hoverPlaying = false;
-		videoReady = false;
-	}
-	// Render-size hint for the browser's srcset picker. `view.thumbnailSize`
-	// is the grid's `minmax(<px>, 1fr)` minimum — real tiles may be a hair
-	// wider when the grid stretches to fill the column, but `tile_*` is
-	// discrete (100/224/500) so the rounding-up at the next variant
-	// boundary swallows the difference.
-	const tilePx = $derived(view.thumbnailSize);
-	const src1x = $derived(thumbSrc(hash, tilePx));
-	const srcset = $derived(thumbSrcSet(hash, tilePx));
+  function onMouseEnter() {
+    if (!video || selected) return;
+    if (hoverTimer) clearTimeout(hoverTimer);
+    hoverTimer = setTimeout(() => {
+      hoverPlaying = true;
+    }, HOVER_DELAY);
+  }
+  function onMouseLeave() {
+    if (hoverTimer) {
+      clearTimeout(hoverTimer);
+      hoverTimer = null;
+    }
+    hoverPlaying = false;
+    videoReady = false;
+  }
+  // Render-size hint for the browser's srcset picker. `view.thumbnailSize`
+  // is the grid's `minmax(<px>, 1fr)` minimum — real tiles may be a hair
+  // wider when the grid stretches to fill the column, but `tile_*` is
+  // discrete (100/224/500) so the rounding-up at the next variant
+  // boundary swallows the difference.
+  const tilePx = $derived(view.thumbnailSize);
+  const src1x = $derived(thumbSrc(hash, tilePx));
+  const srcset = $derived(thumbSrcSet(hash, tilePx));
 </script>
 
 <!--
@@ -74,12 +74,12 @@
 	in <button> is invalid HTML.
 -->
 <div
-	class="group relative h-full w-full"
-	onmouseenter={onMouseEnter}
-	onmouseleave={onMouseLeave}
-	role="presentation"
+  class="group relative h-full w-full"
+  onmouseenter={onMouseEnter}
+  onmouseleave={onMouseLeave}
+  role="presentation"
 >
-	<!--
+  <!--
 		Selection animation: scale to 90% + blue ring + blue tint overlay,
 		driven by a springy `cubic-bezier(0.34, 1.3, 0.64, 1)` over 300ms.
 		The overshoot is intentionally modest — on a *shrink* a larger
@@ -91,85 +91,84 @@
 		The keyboard-focused tile gets the same treatment as a selected one,
 		so the arrow-key cursor reads as a "selection of one".
 	-->
-	<button
-		type="button"
-		data-tile
-		data-uid={photo.UID}
-		onclick={onClick}
-		ondblclick={onDblclick}
-		title="Click to select · Double-click to open"
-		class:scale-90={selected}
-		class:ring-2={selected}
-		class:ring-blue-500={selected}
-		class:ring-offset-2={selected}
-		class:ring-offset-background={selected}
-		class:transition-[transform,box-shadow]={selected}
-		class:duration-300={selected}
-		class:ease-[cubic-bezier(0.34,1.3,0.64,1)]={selected}
-		class="relative h-full w-full overflow-hidden rounded-md border border-border bg-secondary p-0 outline-none focus:outline-none"
-	>
-		<img
-			src={src1x}
-			srcset={srcset}
-			alt={photo.OriginalName ?? photo.FileName ?? photo.Name ?? 'Photo'}
-			loading="lazy"
-			decoding="async"
-			class="h-full w-full object-cover"
-			class:transition={!selected}
-			class:group-hover:scale-105={!selected}
-		/>
-		{#if hoverPlaying}
-			<!--
+  <button
+    type="button"
+    data-tile
+    data-uid={photo.UID}
+    onclick={onClick}
+    ondblclick={onDblclick}
+    class:scale-90={selected}
+    class:ring-2={selected}
+    class:ring-blue-500={selected}
+    class:ring-offset-2={selected}
+    class:ring-offset-background={selected}
+    class:transition-[transform,box-shadow]={selected}
+    class:duration-300={selected}
+    class:ease-[cubic-bezier(0.34,1.3,0.64,1)]={selected}
+    class="relative h-full w-full overflow-hidden rounded-md border border-border bg-secondary p-0 outline-none focus:outline-none"
+  >
+    <img
+      src={src1x}
+      {srcset}
+      alt={photo.OriginalName ?? photo.FileName ?? photo.Name ?? "Photo"}
+      loading="lazy"
+      decoding="async"
+      class="h-full w-full object-cover"
+      class:transition={!selected}
+      class:group-hover:scale-105={!selected}
+    />
+    {#if hoverPlaying}
+      <!--
 				Muted hover-preview video stacked over the thumbnail. We don't
 				unmount the <img> underneath — the video fades in once its
 				first frame is decoded, so the tile never goes blank during
 				the network round-trip. `pointer-events-none` keeps clicks
 				flowing through to the parent <button>.
 			-->
-			<!-- svelte-ignore a11y_media_has_caption -->
-			<video
-				src={videoUrl(hash)}
-				autoplay
-				muted
-				loop
-				playsinline
-				preload="auto"
-				tabindex={-1}
-				oncanplay={() => (videoReady = true)}
-				class="pointer-events-none absolute inset-0 h-full w-full object-cover transition-opacity duration-200"
-				class:opacity-0={!videoReady}
-				class:opacity-100={videoReady}
-			></video>
-		{/if}
-		{#if selected}
-			<div class="pointer-events-none absolute inset-0 bg-blue-500/40"></div>
-		{/if}
-		{#if isVideo(photo)}
-			<span
-				class="absolute left-1.5 top-1.5 rounded bg-background/80 px-1 text-[10px] font-medium text-foreground"
-				>VIDEO</span
-			>
-		{/if}
-	</button>
-	<!--
+      <!-- svelte-ignore a11y_media_has_caption -->
+      <video
+        src={videoUrl(hash)}
+        autoplay
+        muted
+        loop
+        playsinline
+        preload="auto"
+        tabindex={-1}
+        oncanplay={() => (videoReady = true)}
+        class="pointer-events-none absolute inset-0 h-full w-full object-cover transition-opacity duration-200"
+        class:opacity-0={!videoReady}
+        class:opacity-100={videoReady}
+      ></video>
+    {/if}
+    {#if selected}
+      <div class="pointer-events-none absolute inset-0 bg-blue-500/40"></div>
+    {/if}
+    {#if isVideo(photo)}
+      <span
+        class="absolute left-1.5 top-1.5 rounded bg-background/80 px-1 text-[10px] font-medium text-foreground"
+        >VIDEO</span
+      >
+    {/if}
+  </button>
+  <!--
 		Hover-only "open preview" affordance. Single-click on this icon
 		opens the preview directly, giving users a one-click fallback for
 		the dblclick gesture (and a visual cue that previewing is a thing
 		at all). Hidden when the tile is selected — there'd be no preview
 		intent on a tile the user is in the middle of bulk-acting on.
 	-->
-	{#if !selected}
-		<button
-			type="button"
-			class="absolute bottom-1.5 right-1.5 hidden rounded bg-background/80 p-1 text-muted-foreground hover:text-foreground group-hover:block"
-			onclick={(e) => {
-				e.stopPropagation();
-				onOpenPreview();
-			}}
-			title="Open preview"
-			aria-label="Open preview"
-		>
-			<Maximize2 class="h-3 w-3" />
-		</button>
-	{/if}
+  {#if !selected}
+    <button
+      type="button"
+      class="absolute bottom-1.5 right-1.5 hidden rounded bg-background/80 p-1 text-muted-foreground hover:text-foreground group-hover:block"
+      onclick={(e) => {
+        e.stopPropagation();
+        onOpenPreview();
+      }}
+      title="Open preview"
+      aria-label="Open preview"
+    >
+      <Maximize2 class="h-3 w-3" />
+    </button>
+  {/if}
 </div>

web/src/lib/stores/preview.svelte.ts

@@ -1,36 +0,0 @@
-/**
- * Single-photo preview overlay state. The lightbox sits in +layout.svelte
- * and listens to this store; any view (timeline, duplicates view, heaps)
- * can `open(uid)` to pop it. The order array is mirrored from whatever
- * list the user is currently looking at so prev/next stay in context.
- */
-export const preview = $state<{
-	uid: string | null;
-	order: string[];
-}>({
-	uid: null,
-	order: []
-});
-
-export function openPreview(uid: string, order?: string[]): void {
-	if (order) preview.order = order;
-	preview.uid = uid;
-}
-
-export function closePreview(): void {
-	preview.uid = null;
-}
-
-export function previewNext(): void {
-	if (!preview.uid) return;
-	const i = preview.order.indexOf(preview.uid);
-	if (i < 0 || i >= preview.order.length - 1) return;
-	preview.uid = preview.order[i + 1];
-}
-
-export function previewPrev(): void {
-	if (!preview.uid) return;
-	const i = preview.order.indexOf(preview.uid);
-	if (i <= 0) return;
-	preview.uid = preview.order[i - 1];
-}

web/src/lib/stores/view.svelte.ts

@@ -24,6 +24,7 @@ interface Persisted {
 	thumbnailSize?: ThumbnailSize;
 	leftSidebarWidth?: number;
 	rightSidebarWidth?: number;
+	previewPaneHeight?: number;
 	/**
 	 * Per-section expanded state for the right-sidebar metadata panel
 	 * (GPS, Credits, File). Keyed by section id; missing entries use a
@@ -39,6 +40,14 @@ export const DEFAULT_LEFT_WIDTH = 224;
 export const MIN_RIGHT_WIDTH = 220;
 export const MAX_RIGHT_WIDTH = 480;
 export const DEFAULT_RIGHT_WIDTH = 280;
+export const MIN_PREVIEW_HEIGHT = 160;
+export const DEFAULT_PREVIEW_HEIGHT = 360;
+/**
+ * Cap the preview pane at 70 % of the viewport so the grid is always
+ * visible underneath. Resolved against `window.innerHeight` at set-time
+ * (the localStorage load happens before any viewport size is known).
+ */
+export const MAX_PREVIEW_HEIGHT_FRAC = 0.7;
 
 function clamp(n: number, lo: number, hi: number): number {
 	return Math.min(hi, Math.max(lo, n));
@@ -69,6 +78,7 @@ export const view = $state<{
 	thumbnailSize: ThumbnailSize;
 	leftSidebarWidth: number;
 	rightSidebarWidth: number;
+	previewPaneHeight: number;
 	metadataSections: Record<string, boolean>;
 }>({
 	rightSidebarCollapsed: initial.rightSidebarCollapsed ?? false,
@@ -86,6 +96,12 @@ export const view = $state<{
 		MIN_RIGHT_WIDTH,
 		MAX_RIGHT_WIDTH
 	),
+	previewPaneHeight: Math.max(
+		MIN_PREVIEW_HEIGHT,
+		typeof initial.previewPaneHeight === 'number'
+			? initial.previewPaneHeight
+			: DEFAULT_PREVIEW_HEIGHT
+	),
 	metadataSections:
 		initial.metadataSections && typeof initial.metadataSections === 'object'
 			? { ...initial.metadataSections }
@@ -100,6 +116,7 @@ function persist(): void {
 		thumbnailSize: view.thumbnailSize,
 		leftSidebarWidth: view.leftSidebarWidth,
 		rightSidebarWidth: view.rightSidebarWidth,
+		previewPaneHeight: view.previewPaneHeight,
 		metadataSections: view.metadataSections
 	};
 	localStorage.setItem(STORAGE_KEY, JSON.stringify(payload));
@@ -115,6 +132,14 @@ export function setRightSidebarWidth(px: number): void {
 	persist();
 }
 
+export function setPreviewPaneHeight(px: number): void {
+	const maxH = browser
+		? Math.max(MIN_PREVIEW_HEIGHT + 1, Math.floor(window.innerHeight * MAX_PREVIEW_HEIGHT_FRAC))
+		: 1024;
+	view.previewPaneHeight = clamp(Math.round(px), MIN_PREVIEW_HEIGHT, maxH);
+	persist();
+}
+
 export function setThumbnailSize(size: ThumbnailSize): void {
 	view.thumbnailSize = size;
 	persist();

web/src/routes/+layout.svelte

@@ -4,7 +4,6 @@
 	import { browser } from '$app/environment';
 	import { goto } from '$app/navigation';
 	import { page } from '$app/state';
-	import type { Component } from 'svelte';
 	import { QueryClientProvider } from '@tanstack/svelte-query';
 	import { ModeWatcher } from 'mode-watcher';
 	import { Toaster } from 'svelte-sonner';
@@ -13,7 +12,6 @@
 	import { setLeftSidebarWidth, view } from '$lib/stores/view.svelte';
 	import { resizable } from '$lib/actions/resizable';
 	import { queryClient } from '$lib/queryClient';
-	import { preview } from '$lib/stores/preview.svelte';
 	import { startIndexerWatch, stopIndexerWatch } from '$lib/stores/indexer.svelte';
 	import IndexerStatusPill from '$lib/components/layout/IndexerStatusPill.svelte';
 	import LeftSidebar from '$lib/components/layout/LeftSidebar.svelte';
@@ -56,22 +54,6 @@
 		else stopIndexerWatch();
 	});
 
-	// PreviewOverlay is the full-screen lightbox — keyboard nav, map
-	// pane, exif sidebar. Users who never click into a photo never need
-	// it, so we lazy-import the first time `preview.uid` flips non-null
-	// and keep the loaded module around for the rest of the session
-	// (re-opens skip the network round-trip). Closing the overlay leaves
-	// the component mounted but renders nothing — its internal
-	// `{#if preview.uid !== null}` guard collapses the DOM tree.
-	let PreviewOverlay = $state<Component | null>(null);
-	$effect(() => {
-		if (!browser) return;
-		if (preview.uid !== null && PreviewOverlay === null) {
-			void import('$lib/components/preview/PreviewOverlay.svelte').then((m) => {
-				PreviewOverlay = m.default as Component;
-			});
-		}
-	});
 </script>
 
 <svelte:head>
@@ -129,7 +111,4 @@
 	{:else}
 		{@render children?.()}
 	{/if}
-	{#if PreviewOverlay}
-		<PreviewOverlay />
-	{/if}
 </QueryClientProvider>

web/src/routes/+page.svelte

@@ -33,7 +33,6 @@
     setFocused,
     setOrder,
   } from "$lib/stores/selection.svelte";
-  import { openPreview, preview } from "$lib/stores/preview.svelte";
   import {
     setRightSidebarWidth,
     setThumbnailSize,
@@ -51,9 +50,11 @@
   } from "$lib/actions/visibleRange";
   import BulkActionBar from "$lib/components/timeline/BulkActionBar.svelte";
   import BulkMetadataSidebar from "$lib/components/sidebar/BulkMetadataSidebar.svelte";
+  import InlinePreview from "$lib/components/preview/InlinePreview.svelte";
   import PhotoTile from "$lib/components/timeline/PhotoTile.svelte";
   import RightSidebar from "$lib/components/sidebar/RightSidebar.svelte";
   import SkeletonGrid from "$lib/components/timeline/SkeletonGrid.svelte";
+  import SplitGrid from "$lib/components/preview/SplitGrid.svelte";
   import Toolbar from "$lib/components/layout/Toolbar.svelte";
   import { type PpPhoto } from "$lib/types/photoprism";
 
@@ -408,25 +409,6 @@
     if (el) scrollTileIntoView(el);
   }
 
-  // When the preview overlay closes, scroll the just-shown photo back
-  // into the timeline window. PreviewOverlay already keeps
-  // selection.focused in lockstep with preview.uid, so we just need to
-  // make sure that tile is mounted (forcedExpand) and visible — the
-  // blue ring renders itself once the inner button is in the DOM.
-  let wasPreviewOpen = $state(false);
-  $effect(() => {
-    const open = preview.uid !== null;
-    const closing = wasPreviewOpen && !open;
-    wasPreviewOpen = open;
-    if (!closing) return;
-    const uid = selection.focused;
-    if (!uid) return;
-    untrack(() => {
-      const i = photos.findIndex((p) => p.UID === uid);
-      if (i >= 0) void scrollToIndex(i);
-    });
-  });
-
   // ── Visual rows for keyboard navigation ──────────────────────────────────
   // The CSS Grid lays each photo into a cell with column count derived from
   // `repeat(auto-fill, minmax(thumbnailSize, 1fr))`. Month headers span the
@@ -675,24 +657,19 @@
   }
 
   function onTileDblclick(e: MouseEvent, uid: string) {
-    // Modifier-modified dblclicks shouldn't open the preview either —
-    // gridKeyNav already handled the underlying click.
     if (e.shiftKey || e.metaKey || e.ctrlKey) return;
     e.preventDefault();
-    openPreview(
-      uid,
-      photos.map((p) => p.UID),
-    );
+    selection.ids.clear();
+    selection.ids.add(uid);
+    setFocused(uid);
+    setAnchor(uid);
   }
 
-  // Single-click fallback for the dblclick preview gesture. Wired to the
-  // hover-only Maximize icon in PhotoTile so users who haven't discovered
-  // dblclick can still get to the preview.
   function onTileOpenPreview(uid: string) {
-    openPreview(
-      uid,
-      photos.map((p) => p.UID),
-    );
+    selection.ids.clear();
+    selection.ids.add(uid);
+    setFocused(uid);
+    setAnchor(uid);
   }
 
   // Scroll root for the infinite-scroll IntersectionObserver. Bound by
@@ -840,6 +817,11 @@
 		sibling at row level and stays full height when the bar appears.
 	-->
   <div class="flex min-w-0 flex-1 flex-col overflow-hidden">
+    <SplitGrid>
+    {#snippet preview()}
+      <InlinePreview uid={selection.focused} order={selection.order} />
+    {/snippet}
+    {#snippet grid()}
     <main
       bind:this={scrollRoot}
       class="flex-1 overflow-y-auto outline-none focus:outline-none"
@@ -952,6 +934,8 @@
         {/if}
       </div>
     </main>
+    {/snippet}
+    </SplitGrid>
     <BulkActionBar />
   </div>
 

web/src/routes/map/+page.svelte

@@ -7,9 +7,10 @@
 		type MapSourceDataEvent
 	} from 'maplibre-gl';
 	import 'maplibre-gl/dist/maplibre-gl.css';
+	import { goto } from '$app/navigation';
 	import { listGeo, type PpGeoCollection, type PpGeoFeature } from '$lib/services/photoprism';
 	import { isAuthenticated, thumbUrl } from '$lib/stores/session.svelte';
-	import { openPreview } from '$lib/stores/preview.svelte';
+	import { setAnchor, setFocused, setOrder } from '$lib/stores/selection.svelte';
 	import Toolbar from '$lib/components/layout/Toolbar.svelte';
 
 	const geoQuery = createQuery<PpGeoCollection>(() => ({
@@ -154,7 +155,10 @@
 		el.style.backgroundImage = `url(${thumbUrl(hash, 'tile_50')})`;
 		el.addEventListener('click', (ev) => {
 			ev.stopPropagation();
-			openPreview(uid, allUids);
+			setOrder(allUids);
+			setFocused(uid);
+			setAnchor(uid);
+			void goto('/');
 		});
 		return el;
 	}

web/src/routes/photo/[uid]/+page.svelte

@@ -1,16 +1,14 @@
 <script lang="ts">
-	import { goto } from '$app/navigation';
 	import { page } from '$app/state';
-	import { openPreview } from '$lib/stores/preview.svelte';
+	import InlinePreview from '$lib/components/preview/InlinePreview.svelte';
 
-	// Deep-link entry: opening /photo/<uid> directly pops the overlay on
-	// the timeline. The route itself does not render anything; it hands
-	// off to the global PreviewOverlay and redirects to `/` so the URL
-	// stays clean and the timeline shows behind the modal.
-	$effect(() => {
-		const uid = page.params.uid as string | undefined;
-		if (!uid) return;
-		openPreview(uid);
-		void goto('/', { replaceState: true });
-	});
+	// Deep-link entry. The route renders a full-page InlinePreview keyed
+	// on the URL `uid` so the link stays shareable and reload-safe. No
+	// surrounding grid here — this surface is a single-photo viewer.
+	const uid = $derived((page.params.uid ?? null) as string | null);
+	const order = $derived(uid ? [uid] : []);
 </script>
+
+<div class="flex min-h-0 flex-1">
+	<InlinePreview {uid} {order} />
+</div>

web/src/routes/review/+page.svelte

@@ -51,6 +51,8 @@
 	import BulkMetadataSidebar from '$lib/components/sidebar/BulkMetadataSidebar.svelte';
 	import CauseGroupCard from '$lib/components/review/CauseGroupCard.svelte';
 	import DuplicatesView from '$lib/components/duplicates/DuplicatesView.svelte';
+	import InlinePreview from '$lib/components/preview/InlinePreview.svelte';
+	import SplitGrid from '$lib/components/preview/SplitGrid.svelte';
 
 	type DupTab = 'stacks' | 'cross-folder';
 	type Tab = CauseKey | DupTab;
@@ -224,31 +226,38 @@
 {:else}
 	<div class="flex min-h-0 flex-1">
 		<div class="flex min-w-0 flex-1 flex-col">
-			<main class="min-h-0 flex-1 overflow-y-auto px-6 py-4 pb-6" use:gridKeyNav={{}}>
-				{#if reviewQuery.isPending}
-					<p class="text-sm text-muted-foreground">Loading review queue…</p>
-				{:else if reviewQuery.error}
-					<p class="text-sm text-destructive">
-						Could not load review queue: {reviewQuery.error instanceof Error
-							? reviewQuery.error.message
-							: 'unknown error'}
-					</p>
-				{:else if groups.length === 0}
-					<div class="max-w-prose space-y-2 text-sm text-muted-foreground">
-						<p>The review queue is empty.</p>
-						<p class="text-xs">
-							PhotoPrism's indexer flags photos with a low quality score for human
-							review. New arrivals with missing EXIF, low resolution, or unknown
-							cameras will land here. The Stacks and Cross-folder tabs above stay
-							available for duplicate cleanup.
-						</p>
-					</div>
-				{:else if activeGroup}
-					{#key activeGroup.cause}
-						<CauseGroupCard group={activeGroup} />
-					{/key}
-				{/if}
-			</main>
+			<SplitGrid>
+				{#snippet preview()}
+					<InlinePreview uid={selection.focused} order={selection.order} />
+				{/snippet}
+				{#snippet grid()}
+					<main class="min-h-0 flex-1 overflow-y-auto px-6 py-4 pb-6" use:gridKeyNav={{}}>
+						{#if reviewQuery.isPending}
+							<p class="text-sm text-muted-foreground">Loading review queue…</p>
+						{:else if reviewQuery.error}
+							<p class="text-sm text-destructive">
+								Could not load review queue: {reviewQuery.error instanceof Error
+									? reviewQuery.error.message
+									: 'unknown error'}
+							</p>
+						{:else if groups.length === 0}
+							<div class="max-w-prose space-y-2 text-sm text-muted-foreground">
+								<p>The review queue is empty.</p>
+								<p class="text-xs">
+									PhotoPrism's indexer flags photos with a low quality score for human
+									review. New arrivals with missing EXIF, low resolution, or unknown
+									cameras will land here. The Stacks and Cross-folder tabs above stay
+									available for duplicate cleanup.
+								</p>
+							</div>
+						{:else if activeGroup}
+							{#key activeGroup.cause}
+								<CauseGroupCard group={activeGroup} />
+							{/key}
+						{/if}
+					</main>
+				{/snippet}
+			</SplitGrid>
 			<BulkActionBar />
 		</div>
 

web/src/routes/tags/+page.svelte

@@ -4,6 +4,7 @@
 	import { createQuery } from '@tanstack/svelte-query';
 	import {
 		aggregateKeywords,
+		countPhotos,
 		getAllMarks,
 		listLabels,
 		listPhotos,
@@ -11,13 +12,16 @@
 		type PhotoMarksMap,
 		type PpLabel
 	} from '$lib/services/photoprism';
-	import { isAuthenticated, thumbUrl } from '$lib/stores/session.svelte';
+	import { isAuthenticated, session, thumbUrl, userBasePath } from '$lib/stores/session.svelte';
 	import { view } from '$lib/stores/view.svelte';
 	import { primaryFile, type PpPhoto } from '$lib/types/photoprism';
 	import { gridKeyNav } from '$lib/actions/gridKeyNav';
+	import { selection } from '$lib/stores/selection.svelte';
 	import BulkActionBar from '$lib/components/timeline/BulkActionBar.svelte';
+	import InlinePreview from '$lib/components/preview/InlinePreview.svelte';
 	import PhotoGrid from '$lib/components/timeline/PhotoGrid.svelte';
 	import SkeletonGrid from '$lib/components/timeline/SkeletonGrid.svelte';
+	import SplitGrid from '$lib/components/preview/SplitGrid.svelte';
 	import Toolbar from '$lib/components/layout/Toolbar.svelte';
 
 	// Tag-flavoured surfaces, all under one route so the user can swap
@@ -88,6 +92,25 @@
 		enabled: isAuthenticated()
 	}));
 
+	// Photo-count for the Labels tab pill — counts pictures that carry any
+	// label, not distinct label categories. Mirrors (and shares cache with)
+	// the LeftSidebar's labels badge by reusing its scoping rules + queryKey
+	// so the two reads dedupe through svelte-query.
+	const isAdminUser = $derived(session.user?.Role === 'admin');
+	function scopedLabelsFilter(): string {
+		const bp = userBasePath();
+		const base = 'all:true label:*';
+		if (isAdminUser && bp === '') return base;
+		if (!isAdminUser && bp === '') return 'uid:none';
+		return `${base} path:"${bp}*"`;
+	}
+	const labelsPhotoCountQuery = createQuery<number>(() => ({
+		queryKey: ['photos', 'scoped-count', 'labels', userBasePath(), isAdminUser],
+		queryFn: () => countPhotos(scopedLabelsFilter()),
+		enabled: isAuthenticated(),
+		staleTime: 60_000
+	}));
+
 	const keywordsQuery = createQuery<AggregatedKeyword[]>(() => ({
 		queryKey: ['photos', 'keywords'],
 		queryFn: aggregateKeywords,
@@ -186,12 +209,13 @@
 	}
 
 	// ── Per-tab badge counts ─────────────────────────────────────────────────
-	// Each tab pill shows what its grid covers: distinct labels/keywords for
-	// the bucket-style tabs, photo-count for the fixed-cardinality ones
-	// (ratings/colors), matching how the sidebar's Tags badge aggregates.
+	// Each pill shows the number of *photos* a tab covers (not categories),
+	// so all four tabs read on the same scale and match the sidebar's Tags
+	// badge. Keywords stays as a distinct-keyword count because the keywords
+	// pool is the only one without a cheap photo-rollup query.
 	// `undefined` means the underlying query hasn't resolved yet — the badge
 	// is skipped rather than showing a misleading 0.
-	const labelsCount = $derived<number | undefined>(labelsQuery.data?.length);
+	const labelsCount = $derived<number | undefined>(labelsPhotoCountQuery.data);
 	const keywordsCount = $derived<number | undefined>(keywordsQuery.data?.length);
 	const ratedPhotosCount = $derived<number | undefined>(
 		marksQuery.data ? countMarked(marksQuery.data, 'rating') : undefined
@@ -367,24 +391,37 @@
 	{/snippet}
 </Toolbar>
 
+{#if drillKey}
+	<SplitGrid>
+		{#snippet preview()}
+			<InlinePreview uid={selection.focused} order={selection.order} />
+		{/snippet}
+		{#snippet grid()}
+			<main
+				class="min-h-0 flex-1 overflow-y-auto p-6 outline-none focus:outline-none"
+				use:gridKeyNav={{}}
+			>
+				<!-- Drill-down photo grid. Reused for all four tabs; the q-DSL
+				     drives labels/keywords while ratings/colors resolve locally
+				     from the marks pool already in cache. -->
+				{#if activeTab !== 'ratings' && activeTab !== 'colors' && drillPhotosQuery.isPending}
+					<SkeletonGrid />
+				{:else if activeTab !== 'ratings' && activeTab !== 'colors' && drillPhotosQuery.isError}
+					<p class="text-sm text-destructive">Failed to load photos.</p>
+				{:else if drillPhotos.length === 0}
+					<p class="text-sm text-muted-foreground">No photos under this tag.</p>
+				{:else}
+					<PhotoGrid photos={drillPhotos} />
+				{/if}
+			</main>
+		{/snippet}
+	</SplitGrid>
+{:else}
 <main
 	class="min-h-0 flex-1 overflow-y-auto p-6 outline-none focus:outline-none"
 	use:gridKeyNav={{}}
 >
-	{#if drillKey}
-		<!-- Drill-down photo grid. Reused for all four tabs; the q-DSL drives
-		     labels/keywords while ratings/colors resolve locally from the
-		     marks pool already in cache. -->
-		{#if activeTab !== 'ratings' && activeTab !== 'colors' && drillPhotosQuery.isPending}
-			<SkeletonGrid />
-		{:else if activeTab !== 'ratings' && activeTab !== 'colors' && drillPhotosQuery.isError}
-			<p class="text-sm text-destructive">Failed to load photos.</p>
-		{:else if drillPhotos.length === 0}
-			<p class="text-sm text-muted-foreground">No photos under this tag.</p>
-		{:else}
-			<PhotoGrid photos={drillPhotos} />
-		{/if}
-	{:else if activeTab === 'labels'}
+	{#if activeTab === 'labels'}
 		{#if labelsQuery.isPending}
 			<SkeletonGrid />
 		{:else if labelsQuery.isError}
@@ -546,5 +583,6 @@
 		{/if}
 	{/if}
 </main>
+{/if}
 
 <BulkActionBar />