Inline, combine functions, lint

• Create dedicated Hmr component for hot module replacement handling
• Remove inline HMR code from base-timeline-viewer
• Simplify timeline viewer by delegating HMR concerns to specialized component

.vscode/settings.json

@@ -50,7 +50,7 @@
     "editor.formatOnSave": true,
     "editor.tabSize": 2
   },
-  "cSpell.words": ["immich"],
+  "cSpell.words": ["immich", "intersectable", "intersectables"],
   "editor.formatOnSave": true,
   "eslint.validate": ["javascript", "svelte"],
   "explorer.fileNesting.enabled": true,

i18n/en.json

@@ -1339,6 +1339,8 @@
   "my_albums": "My albums",
   "name": "Name",
   "name_or_nickname": "Name or nickname",
+  "navigate": "Navigate",
+  "navigate_to_time": "Navigate to Time",
   "network_requirement_photos_upload": "Use cellular data to backup photos",
   "network_requirement_videos_upload": "Use cellular data to backup videos",
   "network_requirements_updated": "Network requirements changed, resetting backup queue",

web/package.json

@@ -9,7 +9,7 @@
     "build:stats": "BUILD_STATS=true vite build",
     "package": "svelte-kit package",
     "preview": "vite preview",
-    "check:svelte": "svelte-check --no-tsconfig --fail-on-warnings --compiler-warnings 'reactive_declaration_non_reactive_property:ignore' --ignore src/lib/components/photos-page/asset-grid.svelte",
+    "check:svelte": "svelte-check --no-tsconfig --fail-on-warnings",
     "check:typescript": "tsc --noEmit",
     "check:watch": "npm run check:svelte -- --watch",
     "check:code": "npm run format && npm run lint:p && npm run check:svelte && npm run check:typescript",

web/src/lib/components/album-page/album-viewer.svelte

@@ -4,6 +4,7 @@
   import AlbumMap from '$lib/components/album-page/album-map.svelte';
   import SelectAllAssets from '$lib/components/photos-page/actions/select-all-assets.svelte';
   import AssetSelectControlBar from '$lib/components/photos-page/asset-select-control-bar.svelte';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
   import { assetViewingStore } from '$lib/stores/asset-viewing.store';
@@ -18,7 +19,6 @@
   import { onDestroy } from 'svelte';
   import { t } from 'svelte-i18n';
   import DownloadAction from '../photos-page/actions/download-action.svelte';
-  import AssetGrid from '../photos-page/asset-grid.svelte';
   import ControlAppBar from '../shared-components/control-app-bar.svelte';
   import ImmichLogoSmallLink from '../shared-components/immich-logo-small-link.svelte';
   import ThemeButton from '../shared-components/theme-button.svelte';
@@ -61,7 +61,7 @@
 />
 
 <main class="relative h-dvh overflow-hidden px-2 md:px-6 max-md:pt-(--navbar-height-md) pt-(--navbar-height)">
-  <AssetGrid enableRouting={true} {album} {timelineManager} {assetInteraction}>
+  <Timeline enableRouting={true} {album} {timelineManager} {assetInteraction}>
     <section class="pt-8 md:pt-24 px-2 md:px-0">
       <!-- ALBUM TITLE -->
       <h1
@@ -83,7 +83,7 @@
         </p>
       {/if}
     </section>
-  </AssetGrid>
+  </Timeline>
 </main>
 
 <header>

web/src/lib/components/asset-viewer/actions/delete-action.svelte

@@ -1,21 +1,21 @@
 <script lang="ts">
   import { shortcuts } from '$lib/actions/shortcut';
-  import DeleteAssetDialog from '$lib/components/photos-page/delete-asset-dialog.svelte';
   import {
     NotificationType,
     notificationController,
   } from '$lib/components/shared-components/notification/notification';
   import Portal from '$lib/components/shared-components/portal/portal.svelte';
+  import DeleteAssetDialog from '$lib/components/timeline/actions/delete-asset-dialog.svelte';
   import { AssetAction } from '$lib/constants';
   import { showDeleteModal } from '$lib/stores/preferences.store';
   import { featureFlags } from '$lib/stores/server-config.store';
   import { handleError } from '$lib/utils/handle-error';
   import { toTimelineAsset } from '$lib/utils/timeline-util';
   import { deleteAssets, type AssetResponseDto } from '@immich/sdk';
+  import { IconButton } from '@immich/ui';
   import { mdiDeleteForeverOutline, mdiDeleteOutline } from '@mdi/js';
   import { t } from 'svelte-i18n';
   import type { OnAction, PreAction } from './action';
-  import { IconButton } from '@immich/ui';
 
   interface Props {
     asset: AssetResponseDto;

web/src/lib/components/photos-page/actions/delete-assets.svelte

@@ -1,12 +1,12 @@
 <script lang="ts">
   import { featureFlags } from '$lib/stores/server-config.store';
   import { type OnDelete, type OnUndoDelete, deleteAssets } from '$lib/utils/actions';
+  import { IconButton } from '@immich/ui';
   import { mdiDeleteForeverOutline, mdiDeleteOutline, mdiTimerSand } from '@mdi/js';
   import { t } from 'svelte-i18n';
   import MenuOption from '../../shared-components/context-menu/menu-option.svelte';
+  import DeleteAssetDialog from '../../timeline/actions/delete-asset-dialog.svelte';
   import { getAssetControlContext } from '../asset-select-control-bar.svelte';
-  import DeleteAssetDialog from '../delete-asset-dialog.svelte';
-  import { IconButton } from '@immich/ui';
 
   interface Props {
     onAssetDelete: OnDelete;

web/src/lib/components/photos-page/asset-date-group.svelte

@@ -1,253 +0,0 @@
-<script lang="ts">
-  import Thumbnail from '$lib/components/assets/thumbnail/thumbnail.svelte';
-  import Icon from '$lib/components/elements/icon.svelte';
-  import type { DayGroup } from '$lib/managers/timeline-manager/day-group.svelte';
-  import type { MonthGroup } from '$lib/managers/timeline-manager/month-group.svelte';
-  import type { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
-  import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
-  import { assetSnapshot, assetsSnapshot } from '$lib/managers/timeline-manager/utils.svelte';
-  import type { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
-  import { isSelectingAllAssets } from '$lib/stores/assets-store.svelte';
-  import { uploadAssetsStore } from '$lib/stores/upload';
-  import { navigate } from '$lib/utils/navigation';
-
-  import { mdiCheckCircle, mdiCircleOutline } from '@mdi/js';
-
-  import { fromTimelinePlainDate, getDateLocaleString } from '$lib/utils/timeline-util';
-  import type { Snippet } from 'svelte';
-  import { flip } from 'svelte/animate';
-  import { fly, scale } from 'svelte/transition';
-
-  let { isUploading } = uploadAssetsStore;
-
-  interface Props {
-    isSelectionMode: boolean;
-    singleSelect: boolean;
-    withStacked: boolean;
-    showArchiveIcon: boolean;
-    monthGroup: MonthGroup;
-    timelineManager: TimelineManager;
-    assetInteraction: AssetInteraction;
-    customLayout?: Snippet<[TimelineAsset]>;
-
-    onSelect: ({ title, assets }: { title: string; assets: TimelineAsset[] }) => void;
-    onSelectAssets: (asset: TimelineAsset) => void;
-    onSelectAssetCandidates: (asset: TimelineAsset | null) => void;
-    onScrollCompensation: (compensation: { heightDelta?: number; scrollTop?: number }) => void;
-    onThumbnailClick?: (
-      asset: TimelineAsset,
-      timelineManager: TimelineManager,
-      dayGroup: DayGroup,
-      onClick: (
-        timelineManager: TimelineManager,
-        assets: TimelineAsset[],
-        groupTitle: string,
-        asset: TimelineAsset,
-      ) => void,
-    ) => void;
-  }
-
-  let {
-    isSelectionMode,
-    singleSelect,
-    withStacked,
-    showArchiveIcon,
-    monthGroup = $bindable(),
-    assetInteraction,
-    timelineManager,
-    customLayout,
-    onSelect,
-    onSelectAssets,
-    onSelectAssetCandidates,
-    onScrollCompensation,
-    onThumbnailClick,
-  }: Props = $props();
-
-  let isMouseOverGroup = $state(false);
-  let hoveredDayGroup = $state();
-
-  const transitionDuration = $derived.by(() =>
-    monthGroup.timelineManager.suspendTransitions && !$isUploading ? 0 : 150,
-  );
-  const scaleDuration = $derived(transitionDuration === 0 ? 0 : transitionDuration + 100);
-  const _onClick = (
-    timelineManager: TimelineManager,
-    assets: TimelineAsset[],
-    groupTitle: string,
-    asset: TimelineAsset,
-  ) => {
-    if (isSelectionMode || assetInteraction.selectionActive) {
-      assetSelectHandler(timelineManager, asset, assets, groupTitle);
-      return;
-    }
-    void navigate({ targetRoute: 'current', assetId: asset.id });
-  };
-
-  const handleSelectGroup = (title: string, assets: TimelineAsset[]) => onSelect({ title, assets });
-
-  const assetSelectHandler = (
-    timelineManager: TimelineManager,
-    asset: TimelineAsset,
-    assetsInDayGroup: TimelineAsset[],
-    groupTitle: string,
-  ) => {
-    onSelectAssets(asset);
-
-    // Check if all assets are selected in a group to toggle the group selection's icon
-    let selectedAssetsInGroupCount = assetsInDayGroup.filter((asset) =>
-      assetInteraction.hasSelectedAsset(asset.id),
-    ).length;
-
-    // if all assets are selected in a group, add the group to selected group
-    if (selectedAssetsInGroupCount == assetsInDayGroup.length) {
-      assetInteraction.addGroupToMultiselectGroup(groupTitle);
-    } else {
-      assetInteraction.removeGroupFromMultiselectGroup(groupTitle);
-    }
-
-    if (timelineManager.assetCount == assetInteraction.selectedAssets.length) {
-      isSelectingAllAssets.set(true);
-    } else {
-      isSelectingAllAssets.set(false);
-    }
-  };
-
-  const assetMouseEventHandler = (groupTitle: string, asset: TimelineAsset | null) => {
-    // Show multi select icon on hover on date group
-    hoveredDayGroup = groupTitle;
-
-    if (assetInteraction.selectionActive) {
-      onSelectAssetCandidates(asset);
-    }
-  };
-
-  function filterIntersecting<R extends { intersecting: boolean }>(intersectable: R[]) {
-    return intersectable.filter((int) => int.intersecting);
-  }
-
-  const getDayGroupFullDate = (dayGroup: DayGroup): string => {
-    const { month, year } = dayGroup.monthGroup.yearMonth;
-    const date = fromTimelinePlainDate({
-      year,
-      month,
-      day: dayGroup.day,
-    });
-    return getDateLocaleString(date);
-  };
-
-  $effect.root(() => {
-    if (timelineManager.scrollCompensation.monthGroup === monthGroup) {
-      onScrollCompensation(timelineManager.scrollCompensation);
-      timelineManager.clearScrollCompensation();
-    }
-  });
-</script>
-
-{#each filterIntersecting(monthGroup.dayGroups) as dayGroup, groupIndex (dayGroup.day)}
-  {@const absoluteWidth = dayGroup.left}
-
-  <!-- svelte-ignore a11y_no_static_element_interactions -->
-  <section
-    class={[
-      { 'transition-all': !monthGroup.timelineManager.suspendTransitions },
-      !monthGroup.timelineManager.suspendTransitions && `delay-${transitionDuration}`,
-    ]}
-    data-group
-    style:position="absolute"
-    style:transform={`translate3d(${absoluteWidth}px,${dayGroup.top}px,0)`}
-    onmouseenter={() => {
-      isMouseOverGroup = true;
-      assetMouseEventHandler(dayGroup.groupTitle, null);
-    }}
-    onmouseleave={() => {
-      isMouseOverGroup = false;
-      assetMouseEventHandler(dayGroup.groupTitle, null);
-    }}
-  >
-    <!-- Date group title -->
-    <div
-      class="flex pt-7 pb-5 max-md:pt-5 max-md:pb-3 h-6 place-items-center text-xs font-medium text-immich-fg dark:text-immich-dark-fg md:text-sm"
-      style:width={dayGroup.width + 'px'}
-    >
-      {#if !singleSelect && ((hoveredDayGroup === dayGroup.groupTitle && isMouseOverGroup) || assetInteraction.selectedGroup.has(dayGroup.groupTitle))}
-        <div
-          transition:fly={{ x: -24, duration: 200, opacity: 0.5 }}
-          class="inline-block pe-2 hover:cursor-pointer"
-          onclick={() => handleSelectGroup(dayGroup.groupTitle, assetsSnapshot(dayGroup.getAssets()))}
-          onkeydown={() => handleSelectGroup(dayGroup.groupTitle, assetsSnapshot(dayGroup.getAssets()))}
-        >
-          {#if assetInteraction.selectedGroup.has(dayGroup.groupTitle)}
-            <Icon path={mdiCheckCircle} size="24" class="text-primary" />
-          {:else}
-            <Icon path={mdiCircleOutline} size="24" color="#757575" />
-          {/if}
-        </div>
-      {/if}
-
-      <span class="w-full truncate first-letter:capitalize" title={getDayGroupFullDate(dayGroup)}>
-        {dayGroup.groupTitle}
-      </span>
-    </div>
-
-    <!-- Image grid -->
-    <div
-      data-image-grid
-      class="relative overflow-clip"
-      style:height={dayGroup.height + 'px'}
-      style:width={dayGroup.width + 'px'}
-    >
-      {#each filterIntersecting(dayGroup.viewerAssets) as viewerAsset (viewerAsset.id)}
-        {@const position = viewerAsset.position!}
-        {@const asset = viewerAsset.asset!}
-
-        <!-- {#if viewerAsset.intersecting} -->
-        <!-- note: don't remove data-asset-id - its used by web e2e tests -->
-        <div
-          data-asset-id={asset.id}
-          class="absolute"
-          style:top={position.top + 'px'}
-          style:left={position.left + 'px'}
-          style:width={position.width + 'px'}
-          style:height={position.height + 'px'}
-          out:scale|global={{ start: 0.1, duration: scaleDuration }}
-          animate:flip={{ duration: transitionDuration }}
-        >
-          <Thumbnail
-            showStackedIcon={withStacked}
-            {showArchiveIcon}
-            {asset}
-            {groupIndex}
-            onClick={(asset) => {
-              if (typeof onThumbnailClick === 'function') {
-                onThumbnailClick(asset, timelineManager, dayGroup, _onClick);
-              } else {
-                _onClick(timelineManager, dayGroup.getAssets(), dayGroup.groupTitle, asset);
-              }
-            }}
-            onSelect={(asset) => assetSelectHandler(timelineManager, asset, dayGroup.getAssets(), dayGroup.groupTitle)}
-            onMouseEvent={() => assetMouseEventHandler(dayGroup.groupTitle, assetSnapshot(asset))}
-            selected={assetInteraction.hasSelectedAsset(asset.id) ||
-              dayGroup.monthGroup.timelineManager.albumAssets.has(asset.id)}
-            selectionCandidate={assetInteraction.hasSelectionCandidate(asset.id)}
-            disabled={dayGroup.monthGroup.timelineManager.albumAssets.has(asset.id)}
-            thumbnailWidth={position.width}
-            thumbnailHeight={position.height}
-          />
-          {#if customLayout}
-            {@render customLayout(asset)}
-          {/if}
-        </div>
-        <!-- {/if} -->
-      {/each}
-    </div>
-  </section>
-{/each}
-
-<style>
-  section {
-    contain: layout paint style;
-  }
-  [data-image-grid] {
-    user-select: none;
-  }
-</style>

web/src/lib/components/photos-page/asset-viewer-actions.svelte

@@ -0,0 +1,162 @@
+<script lang="ts">
+  import type { Action } from '$lib/components/asset-viewer/actions/action';
+  import { AssetAction } from '$lib/constants';
+  import { authManager } from '$lib/managers/auth-manager.svelte';
+  import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
+  import { assetViewingStore } from '$lib/stores/asset-viewing.store';
+  import { updateStackedAssetInTimeline, updateUnstackedAssetInTimeline } from '$lib/utils/actions';
+  import { navigate } from '$lib/utils/navigation';
+  import { toTimelineAsset } from '$lib/utils/timeline-util';
+  import { getAssetInfo, type AssetResponseDto } from '@immich/sdk';
+
+  let { asset: viewingAsset, gridScrollTarget, mutex } = assetViewingStore;
+
+  interface Props {
+    timelineManager: TimelineManager;
+    showSkeleton: boolean;
+    removeAction?:
+      | AssetAction.UNARCHIVE
+      | AssetAction.ARCHIVE
+      | AssetAction.FAVORITE
+      | AssetAction.UNFAVORITE
+      | AssetAction.SET_VISIBILITY_TIMELINE;
+    handlePreAction?: (action: Action) => Promise<void>;
+    handleAction?: (action: Action) => void;
+    handleNext?: () => Promise<boolean>;
+    handlePrevious?: () => Promise<boolean>;
+    handleRandom?: () => Promise<AssetResponseDto | undefined>;
+    handleClose?: (asset: { id: string }) => Promise<void>;
+  }
+
+  let {
+    timelineManager = $bindable(),
+    showSkeleton = $bindable(false),
+    removeAction,
+    handlePreAction = $bindable(),
+    handleAction = $bindable(),
+    handleNext = $bindable(),
+    handlePrevious = $bindable(),
+    handleRandom = $bindable(),
+    handleClose = $bindable(),
+  }: Props = $props();
+
+  handlePrevious = async () => {
+    const release = await mutex.acquire();
+    const laterAsset = await timelineManager.getLaterAsset($viewingAsset);
+
+    if (laterAsset) {
+      const preloadAsset = await timelineManager.getLaterAsset(laterAsset);
+      const asset = await getAssetInfo({ ...authManager.params, id: laterAsset.id });
+      assetViewingStore.setAsset(asset, preloadAsset ? [preloadAsset] : []);
+      await navigate({ targetRoute: 'current', assetId: laterAsset.id });
+    }
+
+    release();
+    return !!laterAsset;
+  };
+
+  handleNext = async () => {
+    const release = await mutex.acquire();
+    const earlierAsset = await timelineManager.getEarlierAsset($viewingAsset);
+
+    if (earlierAsset) {
+      const preloadAsset = await timelineManager.getEarlierAsset(earlierAsset);
+      const asset = await getAssetInfo({ ...authManager.params, id: earlierAsset.id });
+      assetViewingStore.setAsset(asset, preloadAsset ? [preloadAsset] : []);
+      await navigate({ targetRoute: 'current', assetId: earlierAsset.id });
+    }
+
+    release();
+    return !!earlierAsset;
+  };
+
+  handleRandom = async () => {
+    const randomAsset = await timelineManager.getRandomAsset();
+
+    if (randomAsset) {
+      const asset = await getAssetInfo({ ...authManager.params, id: randomAsset.id });
+      assetViewingStore.setAsset(asset);
+      await navigate({ targetRoute: 'current', assetId: randomAsset.id });
+      return asset;
+    }
+  };
+
+  handleClose = async (asset: { id: string }) => {
+    assetViewingStore.showAssetViewer(false);
+    showSkeleton = true;
+    $gridScrollTarget = { at: asset.id };
+    await navigate({ targetRoute: 'current', assetId: null, assetGridRouteSearchParams: $gridScrollTarget });
+  };
+
+  handlePreAction = async (action: Action) => {
+    switch (action.type) {
+      case removeAction:
+      case AssetAction.TRASH:
+      case AssetAction.RESTORE:
+      case AssetAction.DELETE:
+      case AssetAction.ARCHIVE:
+      case AssetAction.SET_VISIBILITY_LOCKED:
+      case AssetAction.SET_VISIBILITY_TIMELINE: {
+        // find the next asset to show or close the viewer
+        // eslint-disable-next-line @typescript-eslint/no-unused-expressions
+        (await handleNext()) || (await handlePrevious()) || (await handleClose(action.asset));
+
+        // delete after find the next one
+        timelineManager.removeAssets([action.asset.id]);
+        break;
+      }
+    }
+  };
+  handleAction = (action: Action) => {
+    switch (action.type) {
+      case AssetAction.ARCHIVE:
+      case AssetAction.UNARCHIVE:
+      case AssetAction.FAVORITE:
+      case AssetAction.UNFAVORITE: {
+        timelineManager.updateAssets([action.asset]);
+        break;
+      }
+
+      case AssetAction.ADD: {
+        timelineManager.addAssets([action.asset]);
+        break;
+      }
+
+      case AssetAction.UNSTACK: {
+        updateUnstackedAssetInTimeline(timelineManager, action.assets);
+        break;
+      }
+      case AssetAction.REMOVE_ASSET_FROM_STACK: {
+        timelineManager.addAssets([toTimelineAsset(action.asset)]);
+        if (action.stack) {
+          //Have to unstack then restack assets in timeline in order to update the stack count in the timeline.
+          updateUnstackedAssetInTimeline(
+            timelineManager,
+            action.stack.assets.map((asset) => toTimelineAsset(asset)),
+          );
+          updateStackedAssetInTimeline(timelineManager, {
+            stack: action.stack,
+            toDeleteIds: action.stack.assets
+              .filter((asset) => asset.id !== action.stack?.primaryAssetId)
+              .map((asset) => asset.id),
+          });
+        }
+        break;
+      }
+      case AssetAction.SET_STACK_PRIMARY_ASSET: {
+        //Have to unstack then restack assets in timeline in order for the currently removed new primary asset to be made visible.
+        updateUnstackedAssetInTimeline(
+          timelineManager,
+          action.stack.assets.map((asset) => toTimelineAsset(asset)),
+        );
+        updateStackedAssetInTimeline(timelineManager, {
+          stack: action.stack,
+          toDeleteIds: action.stack.assets
+            .filter((asset) => asset.id !== action.stack.primaryAssetId)
+            .map((asset) => asset.id),
+        });
+        break;
+      }
+    }
+  };
+</script>

web/src/lib/components/photos-page/asset-viewer-and-actions.svelte

@@ -0,0 +1,73 @@
+<script lang="ts">
+  import type { Action } from '$lib/components/asset-viewer/actions/action';
+  import AssetViewerActions from '$lib/components/photos-page/asset-viewer-actions.svelte';
+  import { AssetAction } from '$lib/constants';
+  import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
+  import { assetViewingStore } from '$lib/stores/asset-viewing.store';
+  import { type AlbumResponseDto, type AssetResponseDto, type PersonResponseDto } from '@immich/sdk';
+
+  let { asset: viewingAsset, preloadAssets } = assetViewingStore;
+
+  interface Props {
+    timelineManager: TimelineManager;
+    showSkeleton: boolean;
+    removeAction?:
+      | AssetAction.UNARCHIVE
+      | AssetAction.ARCHIVE
+      | AssetAction.FAVORITE
+      | AssetAction.UNFAVORITE
+      | AssetAction.SET_VISIBILITY_TIMELINE;
+    withStacked?: boolean;
+    isShared?: boolean;
+    album?: AlbumResponseDto | null;
+    person?: PersonResponseDto | null;
+    isShowDeleteConfirmation?: boolean;
+  }
+
+  let {
+    timelineManager = $bindable(),
+    showSkeleton = $bindable(false),
+    removeAction,
+    withStacked = false,
+    isShared = false,
+    album = null,
+    person = null,
+    isShowDeleteConfirmation = $bindable(false),
+  }: Props = $props();
+
+  let handlePreAction = <(action: Action) => Promise<void>>$state();
+  let handleAction = <(action: Action) => void>$state();
+  let handleNext = <() => Promise<boolean>>$state();
+  let handlePrevious = <() => Promise<boolean>>$state();
+  let handleRandom = <() => Promise<AssetResponseDto | undefined>>$state();
+  let handleClose = <(asset: { id: string }) => Promise<void>>$state();
+</script>
+
+<AssetViewerActions
+  {timelineManager}
+  {removeAction}
+  bind:showSkeleton
+  bind:handlePreAction
+  bind:handleAction
+  bind:handleNext
+  bind:handlePrevious
+  bind:handleRandom
+  bind:handleClose
+></AssetViewerActions>
+
+{#await import('../asset-viewer/asset-viewer.svelte') then { default: AssetViewer }}
+  <AssetViewer
+    {withStacked}
+    asset={$viewingAsset}
+    preloadAssets={$preloadAssets}
+    {isShared}
+    {album}
+    {person}
+    preAction={handlePreAction}
+    onAction={handleAction}
+    onPrevious={handlePrevious}
+    onNext={handleNext}
+    onRandom={handleRandom}
+    onClose={handleClose}
+  />
+{/await}

web/src/lib/components/shared-components/change-date.spec.ts

@@ -8,6 +8,9 @@ import ChangeDate from './change-date.svelte';
 describe('ChangeDate component', () => {
   const initialDate = DateTime.fromISO('2024-01-01');
   const initialTimeZone = 'Europe/Berlin';
+  const targetDate = DateTime.fromISO('2024-01-01').setZone('UTC+1', {
+    keepLocalTime: true,
+  });
   const currentInterval = {
     start: DateTime.fromISO('2000-02-01T14:00:00+01:00'),
     end: DateTime.fromISO('2001-02-01T14:00:00+01:00'),
@@ -43,7 +46,11 @@ describe('ChangeDate component', () => {
 
     await fireEvent.click(getConfirmButton());
 
-    expect(onConfirm).toHaveBeenCalledWith({ mode: 'absolute', date: '2024-01-01T00:00:00.000+01:00' });
+    expect(onConfirm).toHaveBeenCalledWith({
+      mode: 'absolute',
+      date: '2024-01-01T00:00:00.000+01:00',
+      dateTime: targetDate,
+    });
   });
 
   test('calls onCancel on cancel', async () => {
@@ -58,7 +65,9 @@ describe('ChangeDate component', () => {
 
   describe('when date is in daylight saving time', () => {
     const dstDate = DateTime.fromISO('2024-07-01');
-
+    const targetDate = DateTime.fromISO('2024-07-01').setZone('UTC+2', {
+      keepLocalTime: true,
+    });
     test('should render correct timezone with offset', () => {
       render(ChangeDate, { initialDate: dstDate, initialTimeZone, onCancel, onConfirm });
 
@@ -72,7 +81,11 @@ describe('ChangeDate component', () => {
 
       await fireEvent.click(getConfirmButton());
 
-      expect(onConfirm).toHaveBeenCalledWith({ mode: 'absolute', date: '2024-07-01T00:00:00.000+02:00' });
+      expect(onConfirm).toHaveBeenCalledWith({
+        mode: 'absolute',
+        date: '2024-07-01T00:00:00.000+02:00',
+        dateTime: targetDate,
+      });
     });
   });
 

web/src/lib/components/shared-components/change-date.svelte

@@ -1,15 +1,14 @@
 <script lang="ts">
-  import { ConfirmModal } from '@immich/ui';
-  import { mdiCalendarEditOutline } from '@mdi/js';
+  import { locale } from '$lib/stores/preferences.store';
+  import { getDateTimeOffsetLocaleString } from '$lib/utils/timeline-util.js';
+  import { ConfirmModal, Field, Switch } from '@immich/ui';
+  import { mdiCalendarEdit } from '@mdi/js';
   import { DateTime, Duration } from 'luxon';
   import { t } from 'svelte-i18n';
-  import DateInput from '../elements/date-input.svelte';
-  import Combobox, { type ComboBoxOption } from './combobox.svelte';
-  import DurationInput from '../elements/duration-input.svelte';
-  import { Field, Switch } from '@immich/ui';
-  import { getDateTimeOffsetLocaleString } from '$lib/utils/timeline-util.js';
-  import { locale } from '$lib/stores/preferences.store';
   import { get } from 'svelte/store';
+  import DateInput from '../elements/date-input.svelte';
+  import DurationInput from '../elements/duration-input.svelte';
+  import Combobox, { type ComboBoxOption } from './combobox.svelte';
 
   interface Props {
     title?: string;
@@ -18,6 +17,8 @@
     timezoneInput?: boolean;
     withDuration?: boolean;
     currentInterval?: { start: DateTime; end: DateTime };
+    icon?: string;
+    confirmText?: string;
     onCancel: () => void;
     onConfirm: (result: AbsoluteResult | RelativeResult) => void;
   }
@@ -29,6 +30,8 @@
     timezoneInput = true,
     withDuration = true,
     currentInterval = undefined,
+    icon = mdiCalendarEdit,
+    confirmText,
     onCancel,
     onConfirm,
   }: Props = $props();
@@ -36,6 +39,7 @@
   export type AbsoluteResult = {
     mode: 'absolute';
     date: string;
+    dateTime: DateTime<true>;
   };
 
   export type RelativeResult = {
@@ -192,9 +196,13 @@
       const fixedOffsetZone = `UTC${offsetMinutes >= 0 ? '+' : ''}${Duration.fromObject({ minutes: offsetMinutes }).toFormat('hh:mm')}`;
 
       // Create a DateTime object in this fixed-offset zone, preserving the local time.
-      const finalDateTime = DateTime.fromObject(dtComponents.toObject(), { zone: fixedOffsetZone });
+      const finalDateTime = DateTime.fromObject(dtComponents.toObject(), { zone: fixedOffsetZone }) as DateTime<true>;
 
-      onConfirm({ mode: 'absolute', date: finalDateTime.toISO({ includeOffset: true })! });
+      onConfirm({
+        mode: 'absolute',
+        date: finalDateTime.toISO({ includeOffset: true }),
+        dateTime: finalDateTime,
+      });
     }
 
     if (showRelative && (selectedDuration || selectedRelativeOption)) {
@@ -238,7 +246,8 @@
 <ConfirmModal
   confirmColor="primary"
   {title}
-  icon={mdiCalendarEditOutline}
+  {icon}
+  {confirmText}
   prompt="Please select a new date:"
   disabled={!date.isValid}
   onClose={(confirmed) => (confirmed ? handleConfirm() : onCancel())}

web/src/lib/components/shared-components/gallery-viewer/gallery-viewer.svelte

@@ -23,7 +23,8 @@
   import { debounce } from 'lodash-es';
   import { t } from 'svelte-i18n';
   import AssetViewer from '../../asset-viewer/asset-viewer.svelte';
-  import DeleteAssetDialog from '../../photos-page/delete-asset-dialog.svelte';
+
+  import DeleteAssetDialog from '$lib/components/timeline/actions/delete-asset-dialog.svelte';
   import Portal from '../portal/portal.svelte';
 
   interface Props {

web/src/lib/components/timeline/actions/timeline-keyboard-actions.svelte

@@ -0,0 +1,225 @@
+<script lang="ts">
+  import { goto } from '$app/navigation';
+  import { shortcuts, type ShortcutOptions } from '$lib/actions/shortcut';
+  import {
+    setFocusToAsset as setFocusAssetInit,
+    setFocusTo as setFocusToInit,
+  } from '$lib/components/photos-page/actions/focus-actions';
+  import ChangeDate, {
+    type AbsoluteResult,
+    type RelativeResult,
+  } from '$lib/components/shared-components/change-date.svelte';
+  import { AppRoute } from '$lib/constants';
+  import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
+  import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
+  import ShortcutsModal from '$lib/modals/ShortcutsModal.svelte';
+  import type { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
+  import { assetViewingStore } from '$lib/stores/asset-viewing.store';
+  import { showDeleteModal } from '$lib/stores/preferences.store';
+  import { searchStore } from '$lib/stores/search.svelte';
+  import { featureFlags } from '$lib/stores/server-config.store';
+  import { handlePromiseError } from '$lib/utils';
+  import { deleteAssets, updateStackedAssetInTimeline } from '$lib/utils/actions';
+  import { archiveAssets, cancelMultiselect, selectAllAssets, stackAssets } from '$lib/utils/asset-utils';
+  import { AssetVisibility } from '@immich/sdk';
+  import { modalManager } from '@immich/ui';
+  import { mdiCalendarBlankOutline } from '@mdi/js';
+  import { DateTime } from 'luxon';
+  import { t } from 'svelte-i18n';
+  import DeleteAssetDialog from './delete-asset-dialog.svelte';
+  let { isViewing: showAssetViewer } = assetViewingStore;
+
+  interface Props {
+    timelineManager: TimelineManager;
+    assetInteraction: AssetInteraction;
+    isShowDeleteConfirmation: boolean;
+    onEscape?: () => void;
+    scrollToAsset: (asset: TimelineAsset) => boolean;
+  }
+
+  let {
+    timelineManager = $bindable(),
+    assetInteraction,
+    isShowDeleteConfirmation = $bindable(false),
+    onEscape,
+    scrollToAsset,
+  }: Props = $props();
+
+  let isShowSelectDate = $state(false);
+
+  const trashOrDelete = async (force: boolean = false) => {
+    isShowDeleteConfirmation = false;
+    await deleteAssets(
+      !(isTrashEnabled && !force),
+      (assetIds) => timelineManager.removeAssets(assetIds),
+      assetInteraction.selectedAssets,
+      !isTrashEnabled || force ? undefined : (assets) => timelineManager.addAssets(assets),
+    );
+    assetInteraction.clearMultiselect();
+  };
+
+  const onDelete = () => {
+    const hasTrashedAsset = assetInteraction.selectedAssets.some((asset) => asset.isTrashed);
+
+    if ($showDeleteModal && (!isTrashEnabled || hasTrashedAsset)) {
+      isShowDeleteConfirmation = true;
+      return;
+    }
+    handlePromiseError(trashOrDelete(hasTrashedAsset));
+  };
+
+  const onForceDelete = () => {
+    if ($showDeleteModal) {
+      isShowDeleteConfirmation = true;
+      return;
+    }
+    handlePromiseError(trashOrDelete(true));
+  };
+
+  const onStackAssets = async () => {
+    const result = await stackAssets(assetInteraction.selectedAssets);
+
+    updateStackedAssetInTimeline(timelineManager, result);
+
+    onEscape?.();
+  };
+
+  const toggleArchive = async () => {
+    const visibility = assetInteraction.isAllArchived ? AssetVisibility.Timeline : AssetVisibility.Archive;
+    const ids = await archiveAssets(assetInteraction.selectedAssets, visibility);
+    timelineManager.updateAssetOperation(ids, (asset) => {
+      asset.visibility = visibility;
+      return { remove: false };
+    });
+    deselectAllAssets();
+  };
+
+  let shiftKeyIsDown = $state(false);
+
+  const deselectAllAssets = () => {
+    cancelMultiselect(assetInteraction);
+  };
+
+  const onKeyDown = (event: KeyboardEvent) => {
+    if (searchStore.isSearchEnabled) {
+      return;
+    }
+
+    if (event.key === 'Shift') {
+      event.preventDefault();
+      shiftKeyIsDown = true;
+    }
+  };
+
+  const onKeyUp = (event: KeyboardEvent) => {
+    if (searchStore.isSearchEnabled) {
+      return;
+    }
+
+    if (event.key === 'Shift') {
+      event.preventDefault();
+      shiftKeyIsDown = false;
+    }
+  };
+
+  const onSelectStart = (e: Event) => {
+    if (assetInteraction.selectionActive && shiftKeyIsDown) {
+      e.preventDefault();
+    }
+  };
+
+  const isTrashEnabled = $derived($featureFlags.loaded && $featureFlags.trash);
+  const isEmpty = $derived(timelineManager.isInitialized && timelineManager.months.length === 0);
+  const idsSelectedAssets = $derived(assetInteraction.selectedAssets.map(({ id }) => id));
+  let isShortcutModalOpen = false;
+
+  const handleOpenShortcutModal = async () => {
+    if (isShortcutModalOpen) {
+      return;
+    }
+
+    isShortcutModalOpen = true;
+    await modalManager.show(ShortcutsModal, {});
+    isShortcutModalOpen = false;
+  };
+
+  $effect(() => {
+    if (isEmpty) {
+      assetInteraction.clearMultiselect();
+    }
+  });
+
+  const setFocusTo = setFocusToInit.bind(undefined, scrollToAsset, timelineManager);
+  const setFocusAsset = setFocusAssetInit.bind(undefined, scrollToAsset);
+
+  let shortcutList = $derived(
+    (() => {
+      if (searchStore.isSearchEnabled || $showAssetViewer) {
+        return [];
+      }
+
+      const shortcuts: ShortcutOptions[] = [
+        { shortcut: { key: '?', shift: true }, onShortcut: handleOpenShortcutModal },
+        { shortcut: { key: '/' }, onShortcut: () => goto(AppRoute.EXPLORE) },
+        { shortcut: { key: 'A', ctrl: true }, onShortcut: () => selectAllAssets(timelineManager, assetInteraction) },
+        { shortcut: { key: 'ArrowRight' }, onShortcut: () => setFocusTo('earlier', 'asset') },
+        { shortcut: { key: 'ArrowLeft' }, onShortcut: () => setFocusTo('later', 'asset') },
+        { shortcut: { key: 'D' }, onShortcut: () => setFocusTo('earlier', 'day') },
+        { shortcut: { key: 'D', shift: true }, onShortcut: () => setFocusTo('later', 'day') },
+        { shortcut: { key: 'M' }, onShortcut: () => setFocusTo('earlier', 'month') },
+        { shortcut: { key: 'M', shift: true }, onShortcut: () => setFocusTo('later', 'month') },
+        { shortcut: { key: 'Y' }, onShortcut: () => setFocusTo('earlier', 'year') },
+        { shortcut: { key: 'Y', shift: true }, onShortcut: () => setFocusTo('later', 'year') },
+        { shortcut: { key: 'G' }, onShortcut: () => (isShowSelectDate = true) },
+      ];
+      if (onEscape) {
+        shortcuts.push({ shortcut: { key: 'Escape' }, onShortcut: onEscape });
+      }
+
+      if (assetInteraction.selectionActive) {
+        shortcuts.push(
+          { shortcut: { key: 'Delete' }, onShortcut: onDelete },
+          { shortcut: { key: 'Delete', shift: true }, onShortcut: onForceDelete },
+          { shortcut: { key: 'D', ctrl: true }, onShortcut: () => deselectAllAssets() },
+          { shortcut: { key: 's' }, onShortcut: () => onStackAssets() },
+          { shortcut: { key: 'a', shift: true }, onShortcut: toggleArchive },
+        );
+      }
+
+      return shortcuts;
+    })(),
+  );
+</script>
+
+<svelte:document onkeydown={onKeyDown} onkeyup={onKeyUp} onselectstart={onSelectStart} use:shortcuts={shortcutList} />
+
+{#if isShowDeleteConfirmation}
+  <DeleteAssetDialog
+    size={idsSelectedAssets.length}
+    onCancel={() => (isShowDeleteConfirmation = false)}
+    onConfirm={() => handlePromiseError(trashOrDelete(true))}
+  />
+{/if}
+
+{#if isShowSelectDate}
+  <ChangeDate
+    withDuration={false}
+    icon={mdiCalendarBlankOutline}
+    confirmText={$t('navigate')}
+    title={$t('navigate_to_time')}
+    initialDate={DateTime.now()}
+    timezoneInput={false}
+    onConfirm={async (result: AbsoluteResult | RelativeResult) => {
+      isShowSelectDate = false;
+      if (result.mode === 'absolute') {
+        const asset = await timelineManager.getClosestAssetToDate(
+          (DateTime.fromISO(result.date) as DateTime<true>).toObject(),
+        );
+        if (asset) {
+          setFocusAsset(asset);
+        }
+      }
+    }}
+    onCancel={() => (isShowSelectDate = false)}
+  />
+{/if}

web/src/lib/components/timeline/base-components/base-timeline-viewer.svelte

@@ -0,0 +1,318 @@
+<script lang="ts">
+  import { afterNavigate, beforeNavigate } from '$app/navigation';
+  import { page } from '$app/stores';
+  import { resizeObserver, type OnResizeCallback } from '$lib/actions/resize-observer';
+  import Hmr from '$lib/components/timeline/base-components/hmr.svelte';
+  import Skeleton from '$lib/components/timeline/base-components/skeleton.svelte';
+  import SelectableTimelineMonth from '$lib/components/timeline/internal-components/selectable-timeline-month.svelte';
+  import type { DayGroup } from '$lib/managers/timeline-manager/day-group.svelte';
+  import type { MonthGroup } from '$lib/managers/timeline-manager/month-group.svelte';
+  import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
+  import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
+  import type { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
+  import { assetViewingStore } from '$lib/stores/asset-viewing.store';
+  import { mobileDevice } from '$lib/stores/mobile-device.svelte';
+  import { onMount, type Snippet } from 'svelte';
+  import type { UpdatePayload } from 'vite';
+
+  interface Props {
+    customThumbnailLayout?: Snippet<[TimelineAsset]>;
+
+    isSelectionMode?: boolean;
+    singleSelect?: boolean;
+    /** `true` if this asset grid responds to navigation events; if `true`, then look at the
+     `AssetViewingStore.gridScrollTarget` and load and scroll to the asset specified, and
+     additionally, update the page location/url with the asset as the asset-grid is scrolled */
+    enableRouting: boolean;
+    timelineManager: TimelineManager;
+    assetInteraction: AssetInteraction;
+    withStacked?: boolean;
+    showArchiveIcon?: boolean;
+    showSkeleton?: boolean;
+    isShowDeleteConfirmation?: boolean;
+    styleMarginRightOverride?: string;
+    onAssetOpen?: (dayGroup: DayGroup, asset: TimelineAsset, defaultAssetOpen: () => void) => void;
+    onSelect?: (asset: TimelineAsset) => void;
+    header?: Snippet<[scrollToFunction: (top: number) => void]>;
+    children?: Snippet;
+    empty?: Snippet;
+    handleTimelineScroll?: () => void;
+  }
+
+  let {
+    customThumbnailLayout,
+
+    isSelectionMode = false,
+    singleSelect = false,
+    enableRouting,
+    timelineManager = $bindable(),
+    assetInteraction,
+    withStacked = false,
+    showSkeleton = $bindable(true),
+    showArchiveIcon = false,
+    styleMarginRightOverride,
+    isShowDeleteConfirmation = $bindable(false),
+
+    onAssetOpen,
+    onSelect,
+    children,
+    empty,
+    header,
+    handleTimelineScroll = () => {},
+  }: Props = $props();
+
+  let { gridScrollTarget } = assetViewingStore;
+
+  let element: HTMLElement | undefined = $state();
+  let timelineElement: HTMLElement | undefined = $state();
+
+  const maxMd = $derived(mobileDevice.maxMd);
+  const isEmpty = $derived(timelineManager.isInitialized && timelineManager.months.length === 0);
+
+  $effect(() => {
+    const layoutOptions = maxMd
+      ? {
+          rowHeight: 100,
+          headerHeight: 32,
+        }
+      : {
+          rowHeight: 235,
+          headerHeight: 48,
+        };
+    timelineManager.setLayoutOptions(layoutOptions);
+  });
+
+  const scrollTo = (top: number) => {
+    if (element) {
+      element.scrollTo({ top });
+    }
+    updateSlidingWindow();
+  };
+
+  const scrollBy = (y: number) => {
+    if (element) {
+      element.scrollBy(0, y);
+    }
+    updateSlidingWindow();
+  };
+
+  const scrollCompensation = (compensation: { heightDelta?: number; scrollTop?: number }) => {
+    const { heightDelta, scrollTop } = compensation;
+    if (heightDelta !== undefined) {
+      scrollBy(heightDelta);
+    } else if (scrollTop !== undefined) {
+      scrollTo(scrollTop);
+    }
+    timelineManager.clearScrollCompensation();
+  };
+
+  const getAssetHeight = (assetId: string, monthGroup: MonthGroup) => {
+    // the following method may trigger any layouts, so need to
+    // handle any scroll compensation that may have been set
+    const height = monthGroup!.findAssetAbsolutePosition(assetId);
+
+    // this is in a while loop, since scrollCompensations invoke scrolls
+    // which may load months, triggering more scrollCompensations. Call
+    // this in a loop, until no more layouts occur.
+    while (timelineManager.scrollCompensation.monthGroup) {
+      scrollCompensation(timelineManager.scrollCompensation);
+    }
+    return height;
+  };
+
+  const assetIsVisible = (assetTop: number): boolean => {
+    if (!element) {
+      return false;
+    }
+
+    const { clientHeight, scrollTop } = element;
+    return assetTop >= scrollTop && assetTop < scrollTop + clientHeight;
+  };
+
+  const scrollToAssetId = async (assetId: string) => {
+    const monthGroup = await timelineManager.findMonthGroupForAsset(assetId);
+    if (!monthGroup) {
+      return false;
+    }
+    const height = getAssetHeight(assetId, monthGroup);
+
+    // If the asset is already visible, then don't scroll.
+    if (assetIsVisible(height)) {
+      return true;
+    }
+
+    scrollTo(height);
+    return true;
+  };
+
+  export const scrollToAsset = (asset: TimelineAsset) => {
+    const monthGroup = timelineManager.getMonthGroupByAssetId(asset.id);
+    if (!monthGroup) {
+      return false;
+    }
+    const height = getAssetHeight(asset.id, monthGroup);
+    scrollTo(height);
+    return true;
+  };
+
+  const completeNav = async () => {
+    const scrollTarget = $gridScrollTarget?.at;
+    let scrolled = false;
+    if (scrollTarget) {
+      scrolled = await scrollToAssetId(scrollTarget);
+    }
+    if (!scrolled) {
+      // if the asset is not found, scroll to the top
+      scrollTo(0);
+    }
+    showSkeleton = false;
+  };
+
+  beforeNavigate(() => (timelineManager.suspendTransitions = true));
+
+  afterNavigate((nav) => {
+    const { complete } = nav;
+    complete.then(completeNav, completeNav);
+  });
+
+  const updateIsScrolling = () => (timelineManager.scrolling = true);
+  // Yes, updateSlideWindow() is called by the onScroll event. However, if you also just scrolled
+  // by explicitly invoking element.scrollX functions, there may be a delay with enough time to
+  // set the intersecting property of the monthGroup to false, then true, which causes the DOM
+  // nodes to be recreated, causing bad perf, and also, disrupting focus of those elements.
+  // Also note: don't throttle, debounce, or otherwise do this function async - it causes flicker
+  const updateSlidingWindow = () => timelineManager.updateSlidingWindow(element?.scrollTop || 0);
+
+  const topSectionResizeObserver: OnResizeCallback = ({ height }) => (timelineManager.topSectionHeight = height);
+
+  onMount(() => {
+    if (!enableRouting) {
+      showSkeleton = false;
+    }
+  });
+</script>
+
+<Hmr
+  onAfterUpdate={(payload: UpdatePayload) => {
+    // when hmr happens, skeleton is initialized to true by default
+    // normally, loading asset-grid is part of a navigation event, and the completion of
+    // that event triggers a scroll-to-asset, if necessary, when then clears the skeleton.
+    // this handler will run the navigation/scroll-to-asset handler when hmr is performed,
+    // preventing skeleton from showing after hmr
+    const finishHmr = () => {
+      const asset = $page.url.searchParams.get('at');
+      if (asset) {
+        $gridScrollTarget = { at: asset };
+      }
+      void completeNav();
+    };
+    const assetGridUpdate = payload.updates.some((update) => update.path.endsWith('base-timeline-viewer.svelte'));
+    if (assetGridUpdate) {
+      // wait 500ms for the update to be fully swapped in
+      setTimeout(finishHmr, 500);
+    }
+  }}
+/>
+
+{@render header?.(scrollTo)}
+
+<!-- Right margin MUST be equal to the width of scrubber -->
+<section
+  id="asset-grid"
+  class={['scrollbar-hidden h-full overflow-y-auto outline-none', { 'm-0': isEmpty }, { 'ms-0': !isEmpty }]}
+  style:margin-right={styleMarginRightOverride}
+  tabindex="-1"
+  bind:clientHeight={timelineManager.viewportHeight}
+  bind:clientWidth={null, (v: number) => ((timelineManager.viewportWidth = v), updateSlidingWindow())}
+  bind:this={element}
+  onscroll={() => (handleTimelineScroll(), updateSlidingWindow(), updateIsScrolling())}
+>
+  <section
+    bind:this={timelineElement}
+    id="virtual-timeline"
+    class:invisible={showSkeleton}
+    style:height={timelineManager.timelineHeight + 'px'}
+  >
+    <section
+      use:resizeObserver={topSectionResizeObserver}
+      class:invisible={showSkeleton}
+      style:position="absolute"
+      style:left="0"
+      style:right="0"
+    >
+      {@render children?.()}
+      {#if isEmpty}
+        <!-- (optional) empty placeholder -->
+        {@render empty?.()}
+      {/if}
+    </section>
+
+    {#each timelineManager.months as monthGroup (monthGroup.viewId)}
+      {@const display = monthGroup.intersecting}
+      {@const absoluteHeight = monthGroup.top}
+
+      {#if !monthGroup.isLoaded}
+        <div
+          style:height={monthGroup.height + 'px'}
+          style:position="absolute"
+          style:transform={`translate3d(0,${absoluteHeight}px,0)`}
+          style:width="100%"
+        >
+          <Skeleton
+            height={monthGroup.height - monthGroup.timelineManager.headerHeight}
+            title={monthGroup.monthGroupTitle}
+          />
+        </div>
+      {:else if display}
+        <div
+          class="month-group"
+          style:height={monthGroup.height + 'px'}
+          style:position="absolute"
+          style:transform={`translate3d(0,${absoluteHeight}px,0)`}
+          style:width="100%"
+        >
+          <SelectableTimelineMonth
+            {customThumbnailLayout}
+            {withStacked}
+            {showArchiveIcon}
+            {assetInteraction}
+            {timelineManager}
+            {isSelectionMode}
+            {singleSelect}
+            {monthGroup}
+            {onAssetOpen}
+            onSelect={(isSingleSelect: boolean, asset: TimelineAsset) => {
+              if (isSingleSelect) {
+                scrollTo(0);
+              }
+              onSelect?.(asset);
+            }}
+            onScrollCompensationMonthInDOM={scrollCompensation}
+          />
+        </div>
+      {/if}
+    {/each}
+    <!-- spacer for lead-out -->
+    <div
+      class="h-[60px]"
+      style:position="absolute"
+      style:left="0"
+      style:right="0"
+      style:transform={`translate3d(0,${timelineManager.timelineHeight}px,0)`}
+    ></div>
+  </section>
+</section>
+
+<style>
+  #asset-grid {
+    contain: strict;
+    scrollbar-width: none;
+  }
+
+  .month-group {
+    contain: layout size paint;
+    transform-style: flat;
+    backface-visibility: hidden;
+    transform-origin: center center;
+  }
+</style>

web/src/lib/components/timeline/base-components/base-timeline.svelte

@@ -0,0 +1,200 @@
+<script lang="ts">
+  import BaseTimelineViewer from '$lib/components/timeline/base-components/base-timeline-viewer.svelte';
+  import type { DayGroup } from '$lib/managers/timeline-manager/day-group.svelte';
+  import type { MonthGroup } from '$lib/managers/timeline-manager/month-group.svelte';
+  import type { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
+  import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
+  import type { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
+  import { findMonthAtScrollPosition, type ScrubberListener, type TimelineYearMonth } from '$lib/utils/timeline-util';
+  import type { Snippet } from 'svelte';
+  import Scrubber from './scrubber.svelte';
+
+  interface Props {
+    customThumbnailLayout?: Snippet<[TimelineAsset]>;
+
+    isSelectionMode?: boolean;
+    singleSelect?: boolean;
+    /** `true` if this timeline responds to navigation events; if `true`, then look at the
+     `AssetViewingStore.gridScrollTarget` and load and scroll to the asset specified, and
+     additionally, update the page location/url with the asset as the asset-grid is scrolled */
+    enableRouting: boolean;
+    timelineManager: TimelineManager;
+    assetInteraction: AssetInteraction;
+
+    withStacked?: boolean;
+    showArchiveIcon?: boolean;
+    showSkeleton?: boolean;
+
+    isShowDeleteConfirmation?: boolean;
+    onAssetOpen?: (dayGroup: DayGroup, asset: TimelineAsset, defaultAssetOpen: () => void) => void;
+    onSelect?: (asset: TimelineAsset) => void;
+
+    children?: Snippet;
+    empty?: Snippet;
+  }
+
+  let {
+    customThumbnailLayout,
+    isSelectionMode = false,
+    singleSelect = false,
+    enableRouting,
+    timelineManager = $bindable(),
+    assetInteraction,
+
+    withStacked = false,
+    showArchiveIcon = false,
+    showSkeleton = $bindable(true),
+    isShowDeleteConfirmation = $bindable(false),
+    onAssetOpen,
+    onSelect = () => {},
+    children,
+    empty,
+  }: Props = $props();
+
+  const VIEWPORT_MULTIPLIER = 2; // Used to determine if timeline is "small"
+
+  // The percentage of scroll through the month that is currently intersecting the top boundary of the viewport.
+  // Note: There may be multiple months visible within the viewport at any given time.
+  let viewportTopMonthScrollPercent = $state(0);
+  // The timeline month intersecting the top position of the viewport
+  let viewportTopMonth: TimelineYearMonth | undefined = $state(undefined);
+  // Overall scroll percentage through the entire timeline (0-1)
+  let timelineScrollPercent: number = $state(0);
+  // Indicates whether the viewport is currently in the lead-out section (after all months)
+  let isInLeadOutSection = $state(false);
+  // Width of the scrubber component in pixels, used to adjust timeline margins
+  let scrubberWidth: number = $state(0);
+
+  // note: don't throttle, debounce, or otherwise make this function async - it causes flicker
+  // this function updates the scrubber position based on the current scroll position in the timeline
+  const handleTimelineScroll = () => {
+    isInLeadOutSection = false;
+
+    // Handle edge cases: small timeline (limited scroll) or lead-in area scrolling
+    const top = timelineManager.visibleWindow.top;
+    if (isSmallTimeline() || top < timelineManager.topSectionHeight) {
+      calculateTimelineScrollPercent();
+      return;
+    }
+
+    // Handle normal month scrolling
+    handleMonthScroll();
+  };
+
+  const handleMonthScroll = () => {
+    const scrollPosition = timelineManager.visibleWindow.top;
+    const months = timelineManager.months;
+    const maxScrollPercent = timelineManager.getMaxScrollPercent();
+
+    // Find the month at the current scroll position
+    const searchResult = findMonthAtScrollPosition(months, scrollPosition, maxScrollPercent);
+
+    if (searchResult) {
+      viewportTopMonth = searchResult.month;
+      viewportTopMonthScrollPercent = searchResult.monthScrollPercent;
+      isInLeadOutSection = false;
+      return;
+    }
+
+    // We're in lead-out section
+    isInLeadOutSection = true;
+    timelineScrollPercent = 1;
+    resetScrubberMonth();
+  };
+
+  const resetScrubberMonth = () => {
+    viewportTopMonth = undefined;
+    viewportTopMonthScrollPercent = 0;
+  };
+
+  const calculateTimelineScrollPercent = () => {
+    const maxScroll = timelineManager.getMaxScroll();
+    timelineScrollPercent = Math.min(1, timelineManager.visibleWindow.top / maxScroll);
+    resetScrubberMonth();
+  };
+
+  const handleOverallPercentScroll = (percent: number, scrollTo?: (offset: number) => void) => {
+    const maxScroll = timelineManager.getMaxScroll();
+    const offset = maxScroll * percent;
+    scrollTo?.(offset);
+  };
+
+  const findMonthGroup = (target: TimelineYearMonth) => {
+    return timelineManager.months.find(
+      ({ yearMonth }) => yearMonth.year === target.year && yearMonth.month === target.month,
+    );
+  };
+
+  const isSmallTimeline = () => {
+    return timelineManager.timelineHeight < timelineManager.viewportHeight * VIEWPORT_MULTIPLIER;
+  };
+
+  // note: don't throttle, debounce, or otherwise make this function async - it causes flicker
+  // this function scrolls the timeline to the specified month group and offset, based on scrubber interaction
+  const onScrub: ScrubberListener = (scrubberData) => {
+    const { scrubberMonth, overallScrollPercent, scrubberMonthScrollPercent, scrollToFunction } = scrubberData;
+
+    // Handle edge case or no month selected
+    if (!scrubberMonth || isSmallTimeline()) {
+      handleOverallPercentScroll(overallScrollPercent, scrollToFunction);
+      return;
+    }
+
+    // Find and scroll to the selected month
+    const monthGroup = findMonthGroup(scrubberMonth);
+    if (monthGroup) {
+      scrollToPositionWithinMonth(monthGroup, scrubberMonthScrollPercent, scrollToFunction);
+    }
+  };
+
+  const scrollToPositionWithinMonth = (
+    monthGroup: MonthGroup,
+    monthGroupScrollPercent: number,
+    handleScrollTop?: (top: number) => void,
+  ) => {
+    const topOffset = monthGroup.top;
+    const maxScrollPercent = timelineManager.getMaxScrollPercent();
+    const delta = monthGroup.height * monthGroupScrollPercent;
+    const scrollToTop = (topOffset + delta) * maxScrollPercent;
+
+    handleScrollTop?.(scrollToTop);
+  };
+  let baseTimelineViewer: BaseTimelineViewer | undefined = $state();
+  export const scrollToAsset = (asset: TimelineAsset) => baseTimelineViewer?.scrollToAsset(asset) ?? false;
+</script>
+
+<BaseTimelineViewer
+  {customThumbnailLayout}
+  {isSelectionMode}
+  {singleSelect}
+  {enableRouting}
+  {timelineManager}
+  {assetInteraction}
+  {withStacked}
+  {showArchiveIcon}
+  {showSkeleton}
+  {isShowDeleteConfirmation}
+  styleMarginRightOverride={scrubberWidth + 'px'}
+  {onAssetOpen}
+  {onSelect}
+  {children}
+  {empty}
+  {handleTimelineScroll}
+>
+  {#snippet header(scrollToFunction)}
+    {#if timelineManager.months.length > 0}
+      <Scrubber
+        {timelineManager}
+        height={timelineManager.viewportHeight}
+        timelineTopOffset={timelineManager.topSectionHeight}
+        timelineBottomOffset={timelineManager.bottomSectionHeight}
+        {isInLeadOutSection}
+        {timelineScrollPercent}
+        {viewportTopMonthScrollPercent}
+        {viewportTopMonth}
+        onScrub={(scrubberData) => onScrub({ ...scrubberData, scrollToFunction })}
+        bind:scrubberWidth
+      />
+    {/if}
+  {/snippet}
+</BaseTimelineViewer>

web/src/lib/components/timeline/base-components/hmr.svelte

@@ -0,0 +1,16 @@
+<script lang="ts">
+  import { onMount } from 'svelte';
+  import type { UpdatePayload } from 'vite';
+
+  interface Props {
+    onAfterUpdate: (payload: UpdatePayload) => void;
+  }
+  let { onAfterUpdate }: Props = $props();
+
+  onMount(() => {
+    if (import.meta && import.meta.hot) {
+      import.meta.hot.on('vite:afterUpdate', onAfterUpdate);
+      return () => import.meta.hot && import.meta.hot.off('vite:afterUpdate', onAfterUpdate);
+    }
+  });
+</script>

web/src/lib/components/timeline/base-components/scrubber.svelte

@@ -4,25 +4,38 @@
   import type { ScrubberMonth } from '$lib/managers/timeline-manager/types';
   import { mobileDevice } from '$lib/stores/mobile-device.svelte';
   import { getTabbable } from '$lib/utils/focus-util';
-  import { type ScrubberListener } from '$lib/utils/timeline-util';
+  import { type ScrubberListener, type TimelineYearMonth } from '$lib/utils/timeline-util';
   import { mdiPlay } from '@mdi/js';
   import { clamp } from 'lodash-es';
   import { onMount } from 'svelte';
   import { fade, fly } from 'svelte/transition';
 
   interface Props {
+    /** Offset from the top of the timeline (e.g., for headers) */
     timelineTopOffset?: number;
+    /** Offset from the bottom of the timeline (e.g., for footers) */
     timelineBottomOffset?: number;
+    /** Total height of the scrubber component */
     height?: number;
+    /** Timeline manager instance that controls the timeline state */
     timelineManager: TimelineManager;
-    scrubOverallPercent?: number;
-    scrubberMonthPercent?: number;
-    scrubberMonth?: { year: number; month: number };
-    leadout?: boolean;
+    /** Overall scroll percentage through the entire timeline (0-1), used when no specific month is targeted */
+    timelineScrollPercent?: number;
+    /** The percentage of scroll through the month that is currently intersecting the top boundary of the viewport */
+    viewportTopMonthScrollPercent?: number;
+    /** The year/month of the timeline month at the top of the viewport */
+    viewportTopMonth?: TimelineYearMonth;
+    /** Indicates whether the viewport is currently in the lead-out section (after all months) */
+    isInLeadOutSection?: boolean;
+    /** Width of the scrubber component in pixels (bindable for parent component margin adjustments) */
     scrubberWidth?: number;
+    /** Callback fired when user interacts with the scrubber to navigate */
     onScrub?: ScrubberListener;
+    /** Callback fired when keyboard events occur on the scrubber */
     onScrubKeyDown?: (event: KeyboardEvent, element: HTMLElement) => void;
+    /** Callback fired when scrubbing starts */
     startScrub?: ScrubberListener;
+    /** Callback fired when scrubbing stops */
     stopScrub?: ScrubberListener;
   }
 
@@ -31,10 +44,10 @@
     timelineBottomOffset = 0,
     height = 0,
     timelineManager,
-    scrubOverallPercent = 0,
-    scrubberMonthPercent = 0,
-    scrubberMonth = undefined,
-    leadout = false,
+    timelineScrollPercent = 0,
+    viewportTopMonthScrollPercent = 0,
+    viewportTopMonth = undefined,
+    isInLeadOutSection = false,
     onScrub = undefined,
     onScrubKeyDown = undefined,
     startScrub = undefined,
@@ -100,7 +113,7 @@
         offset += scrubberMonthPercent * relativeBottomOffset;
       }
       return offset;
-    } else if (leadout) {
+    } else if (isInLeadOutSection) {
       let offset = relativeTopOffset;
       for (const segment of segments) {
         offset += segment.height;
@@ -111,7 +124,9 @@
       return scrubOverallPercent * (height - (PADDING_TOP + PADDING_BOTTOM));
     }
   };
-  let scrollY = $derived(toScrollFromMonthGroupPercentage(scrubberMonth, scrubberMonthPercent, scrubOverallPercent));
+  let scrollY = $derived(
+    toScrollFromMonthGroupPercentage(viewportTopMonth, viewportTopMonthScrollPercent, timelineScrollPercent),
+  );
   let timelineFullHeight = $derived(timelineManager.scrubberTimelineHeight + timelineTopOffset + timelineBottomOffset);
   let relativeTopOffset = $derived(toScrollY(timelineTopOffset / timelineFullHeight));
   let relativeBottomOffset = $derived(toScrollY(timelineBottomOffset / timelineFullHeight));
@@ -295,12 +310,24 @@
 
     const scrollPercent = toTimelineY(hoverY);
     if (wasDragging === false && isDragging) {
-      void startScrub?.(segmentDate!, scrollPercent, monthGroupPercentY);
-      void onScrub?.(segmentDate!, scrollPercent, monthGroupPercentY);
+      void startScrub?.({
+        scrubberMonth: segmentDate!,
+        overallScrollPercent: scrollPercent,
+        scrubberMonthScrollPercent: monthGroupPercentY,
+      });
+      void onScrub?.({
+        scrubberMonth: segmentDate!,
+        overallScrollPercent: scrollPercent,
+        scrubberMonthScrollPercent: monthGroupPercentY,
+      });
     }
 
     if (wasDragging && !isDragging) {
-      void stopScrub?.(segmentDate!, scrollPercent, monthGroupPercentY);
+      void stopScrub?.({
+        scrubberMonth: segmentDate!,
+        overallScrollPercent: scrollPercent,
+        scrubberMonthScrollPercent: monthGroupPercentY,
+      });
       return;
     }
 
@@ -308,7 +335,11 @@
       return;
     }
 
-    void onScrub?.(segmentDate!, scrollPercent, monthGroupPercentY);
+    void onScrub?.({
+      scrubberMonth: segmentDate!,
+      overallScrollPercent: scrollPercent,
+      scrubberMonthScrollPercent: monthGroupPercentY,
+    });
   };
   /* eslint-disable tscompat/tscompat */
   const getTouch = (event: TouchEvent) => {
@@ -412,7 +443,11 @@
       }
       if (next) {
         event.preventDefault();
-        void onScrub?.({ year: next.year, month: next.month }, -1, 0);
+        void onScrub?.({
+          scrubberMonth: { year: next.year, month: next.month },
+          overallScrollPercent: -1,
+          scrubberMonthScrollPercent: 0,
+        });
         return true;
       }
     }
@@ -422,7 +457,11 @@
         const next = segments[idx + 1];
         if (next) {
           event.preventDefault();
-          void onScrub?.({ year: next.year, month: next.month }, -1, 0);
+          void onScrub?.({
+            scrubberMonth: { year: next.year, month: next.month },
+            overallScrollPercent: -1,
+            scrubberMonthScrollPercent: 0,
+          });
           return true;
         }
       }

web/src/lib/components/timeline/base-components/skeleton.svelte

@@ -13,11 +13,7 @@
   >
     {title}
   </div>
-  <div
-    class="animate-pulse absolute h-full ms-[10px] me-[10px]"
-    style:width="calc(100% - 20px)"
-    data-skeleton="true"
-  ></div>
+  <div class="animate-pulse absolute h-full w-full" data-skeleton="true"></div>
 </div>
 
 <style>

web/src/lib/components/timeline/base-components/timeline-month.svelte

@@ -0,0 +1,181 @@
+<script lang="ts">
+  import Thumbnail from '$lib/components/assets/thumbnail/thumbnail.svelte';
+  import Icon from '$lib/components/elements/icon.svelte';
+  import type { MonthGroup } from '$lib/managers/timeline-manager/month-group.svelte';
+  import type { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
+  import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
+  import { assetSnapshot, assetsSnapshot } from '$lib/managers/timeline-manager/utils.svelte';
+  import { uploadAssetsStore } from '$lib/stores/upload';
+
+  import { mdiCheckCircle, mdiCircleOutline } from '@mdi/js';
+
+  import { flip } from 'svelte/animate';
+  import { fly, scale } from 'svelte/transition';
+
+  import { DayGroup } from '$lib/managers/timeline-manager/day-group.svelte';
+  import type { Snippet } from 'svelte';
+
+  let { isUploading } = uploadAssetsStore;
+
+  interface Props {
+    customThumbnailLayout?: Snippet<[TimelineAsset]>;
+
+    singleSelect: boolean;
+    withStacked: boolean;
+    showArchiveIcon: boolean;
+    monthGroup: MonthGroup;
+    timelineManager: TimelineManager;
+
+    onScrollCompensationMonthInDOM: (compensation: { heightDelta?: number; scrollTop?: number }) => void;
+
+    onHover: (dayGroup: DayGroup, asset: TimelineAsset) => void;
+    onAssetOpen?: (dayGroup: DayGroup, asset: TimelineAsset) => void;
+    onAssetSelect: (dayGroup: DayGroup, asset: TimelineAsset) => void;
+    onDayGroupSelect: (dayGroup: DayGroup, assets: TimelineAsset[]) => void;
+
+    // these should be replaced with reactive properties in timeline-manager.svelte.ts
+    isDayGroupSelected: (dayGroup: DayGroup) => boolean;
+    isAssetSelected: (asset: TimelineAsset) => boolean;
+    isAssetSelectionCandidate: (asset: TimelineAsset) => boolean;
+    isAssetDisabled: (asset: TimelineAsset) => boolean;
+  }
+
+  let {
+    customThumbnailLayout,
+
+    singleSelect,
+    withStacked,
+    showArchiveIcon,
+    monthGroup,
+    timelineManager,
+    onScrollCompensationMonthInDOM,
+
+    onHover,
+    onAssetOpen,
+    onAssetSelect,
+    onDayGroupSelect,
+
+    isDayGroupSelected,
+    isAssetSelected,
+    isAssetSelectionCandidate,
+    isAssetDisabled,
+  }: Props = $props();
+
+  let isMouseOverGroup = $state(false);
+  let hoveredDayGroup = $state();
+
+  const transitionDuration = $derived.by(() =>
+    monthGroup.timelineManager.suspendTransitions && !$isUploading ? 0 : 150,
+  );
+  const scaleDuration = $derived(transitionDuration === 0 ? 0 : transitionDuration + 100);
+
+  function filterIntersecting<R extends { intersecting: boolean }>(intersectables: R[]) {
+    return intersectables.filter((intersectable) => intersectable.intersecting);
+  }
+
+  $effect.root(() => {
+    if (timelineManager.scrollCompensation.monthGroup === monthGroup) {
+      onScrollCompensationMonthInDOM(timelineManager.scrollCompensation);
+    }
+  });
+</script>
+
+{#each filterIntersecting(monthGroup.dayGroups) as dayGroup, groupIndex (dayGroup.day)}
+  {@const absoluteWidth = dayGroup.left}
+
+  <!-- svelte-ignore a11y_no_static_element_interactions -->
+  <section
+    class={[
+      { 'transition-all': !monthGroup.timelineManager.suspendTransitions },
+      !monthGroup.timelineManager.suspendTransitions && `delay-${transitionDuration}`,
+    ]}
+    data-group
+    style:position="absolute"
+    style:transform={`translate3d(${absoluteWidth}px,${dayGroup.top}px,0)`}
+    onmouseenter={() => {
+      isMouseOverGroup = true;
+      hoveredDayGroup = dayGroup.groupTitle;
+    }}
+    onmouseleave={() => {
+      isMouseOverGroup = false;
+      hoveredDayGroup = null;
+    }}
+  >
+    <!-- Date group title -->
+    <div
+      class="flex pt-7 pb-5 max-md:pt-5 max-md:pb-3 h-6 place-items-center text-xs font-medium text-immich-fg dark:text-immich-dark-fg md:text-sm"
+      style:width={dayGroup.width + 'px'}
+    >
+      {#if !singleSelect && ((hoveredDayGroup === dayGroup.groupTitle && isMouseOverGroup) || isDayGroupSelected(dayGroup))}
+        <div
+          transition:fly={{ x: -24, duration: 200, opacity: 0.5 }}
+          class="inline-block pe-2 hover:cursor-pointer"
+          onclick={() => onDayGroupSelect(dayGroup, assetsSnapshot(dayGroup.getAssets()))}
+          onkeydown={() => onDayGroupSelect(dayGroup, assetsSnapshot(dayGroup.getAssets()))}
+        >
+          {#if isDayGroupSelected(dayGroup)}
+            <Icon path={mdiCheckCircle} size="24" class="text-primary" />
+          {:else}
+            <Icon path={mdiCircleOutline} size="24" color="#757575" />
+          {/if}
+        </div>
+      {/if}
+
+      <span class="w-full truncate first-letter:capitalize" title={dayGroup.groupTitleFull}>
+        {dayGroup.groupTitle}
+      </span>
+    </div>
+
+    <!-- Image grid -->
+    <div
+      data-image-grid
+      class="relative overflow-clip"
+      style:height={dayGroup.height + 'px'}
+      style:width={dayGroup.width + 'px'}
+    >
+      {#each filterIntersecting(dayGroup.viewerAssets) as viewerAsset (viewerAsset.id)}
+        {@const position = viewerAsset.position!}
+        {@const asset = viewerAsset.asset!}
+
+        <!-- note: don't remove data-asset-id - its used by web e2e tests -->
+        <div
+          data-asset-id={asset.id}
+          class="absolute"
+          style:top={position.top + 'px'}
+          style:left={position.left + 'px'}
+          style:width={position.width + 'px'}
+          style:height={position.height + 'px'}
+          out:scale|global={{ start: 0.1, duration: scaleDuration }}
+          animate:flip={{ duration: transitionDuration }}
+        >
+          <Thumbnail
+            showStackedIcon={withStacked}
+            {showArchiveIcon}
+            {asset}
+            {groupIndex}
+            onClick={() => onAssetOpen?.(dayGroup, assetSnapshot(asset))}
+            onSelect={() => onAssetSelect(dayGroup, assetSnapshot(asset))}
+            onMouseEvent={() => onHover(dayGroup, assetSnapshot(asset))}
+            selected={isAssetSelected(asset)}
+            selectionCandidate={isAssetSelectionCandidate(asset)}
+            disabled={isAssetDisabled(asset)}
+            thumbnailWidth={position.width}
+            thumbnailHeight={position.height}
+          />
+          {#if customThumbnailLayout}
+            {@render customThumbnailLayout(asset)}
+          {/if}
+        </div>
+      {/each}
+    </div>
+  </section>
+{/each}
+
+<style>
+  section {
+    contain: layout paint style;
+  }
+  [data-image-grid] {
+    user-select: none;
+  }
+</style>

web/src/lib/components/timeline/internal-components/selectable-timeline-month.svelte

@@ -0,0 +1,276 @@
+<script lang="ts">
+  import type { MonthGroup } from '$lib/managers/timeline-manager/month-group.svelte';
+  import type { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
+  import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
+  import { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
+  import { isSelectingAllAssets } from '$lib/stores/assets-store.svelte';
+  import { navigate } from '$lib/utils/navigation';
+
+  import TimelineMonth from '$lib/components/timeline/base-components/timeline-month.svelte';
+  import { DayGroup } from '$lib/managers/timeline-manager/day-group.svelte';
+  import { assetsSnapshot } from '$lib/managers/timeline-manager/utils.svelte';
+  import { searchStore } from '$lib/stores/search.svelte';
+  import type { Snippet } from 'svelte';
+
+  interface Props {
+    customThumbnailLayout?: Snippet<[TimelineAsset]>;
+
+    isSelectionMode: boolean;
+    singleSelect: boolean;
+    withStacked: boolean;
+    showArchiveIcon: boolean;
+    monthGroup: MonthGroup;
+    timelineManager: TimelineManager;
+    assetInteraction: AssetInteraction;
+
+    onAssetOpen?: (dayGroup: DayGroup, asset: TimelineAsset, defaultAssetOpen: () => void) => void;
+    onSelect?: (isSingleSelect: boolean, asset: TimelineAsset) => void;
+    onScrollCompensationMonthInDOM: (compensation: { heightDelta?: number; scrollTop?: number }) => void;
+  }
+
+  let {
+    customThumbnailLayout,
+    isSelectionMode,
+    singleSelect,
+    withStacked,
+    showArchiveIcon,
+    monthGroup = $bindable(),
+    assetInteraction,
+    timelineManager,
+    onAssetOpen,
+    onSelect,
+    onScrollCompensationMonthInDOM,
+  }: Props = $props();
+
+  let lastAssetMouseEvent: TimelineAsset | null = $state(null);
+  let shiftKeyIsDown = $state(false);
+  let isEmpty = $derived(timelineManager.isInitialized && timelineManager.months.length === 0);
+
+  $effect(() => {
+    if (!lastAssetMouseEvent || !lastAssetMouseEvent) {
+      assetInteraction.clearAssetSelectionCandidates();
+    }
+    if (shiftKeyIsDown && lastAssetMouseEvent) {
+      void selectAssetCandidates(lastAssetMouseEvent);
+    }
+    if (isEmpty) {
+      assetInteraction.clearMultiselect();
+    }
+  });
+
+  const defaultAssetOpen = (dayGroup: DayGroup, asset: TimelineAsset) => {
+    if (isSelectionMode || assetInteraction.selectionActive) {
+      handleAssetSelect(dayGroup, asset);
+      return;
+    }
+    void navigate({ targetRoute: 'current', assetId: asset.id });
+  };
+
+  const handleOnAssetOpen = (dayGroup: DayGroup, asset: TimelineAsset) => {
+    if (onAssetOpen) {
+      onAssetOpen(dayGroup, asset, () => defaultAssetOpen(dayGroup, asset));
+      return;
+    }
+    defaultAssetOpen(dayGroup, asset);
+  };
+
+  // called when clicking asset with shift key pressed or with mouse
+  const handleAssetSelect = (dayGroup: DayGroup, asset: TimelineAsset) => {
+    void onSelectAssets(asset);
+
+    const assetsInDayGroup = dayGroup.getAssets();
+    const groupTitle = dayGroup.groupTitle;
+    // Check if all assets are selected in a group to toggle the group selection's icon
+    let selectedAssetsInGroupCount = assetsInDayGroup.filter((asset) =>
+      assetInteraction.hasSelectedAsset(asset.id),
+    ).length;
+
+    // if all assets are selected in a group, add the group to selected group
+    if (selectedAssetsInGroupCount == assetsInDayGroup.length) {
+      assetInteraction.addGroupToMultiselectGroup(groupTitle);
+    } else {
+      assetInteraction.removeGroupFromMultiselectGroup(groupTitle);
+    }
+
+    if (timelineManager.assetCount == assetInteraction.selectedAssets.length) {
+      isSelectingAllAssets.set(true);
+    } else {
+      isSelectingAllAssets.set(false);
+    }
+  };
+
+  const handleSelectAsset = (asset: TimelineAsset) => {
+    if (!timelineManager.albumAssets.has(asset.id)) {
+      assetInteraction.selectAsset(asset);
+    }
+  };
+
+  const onKeyDown = (event: KeyboardEvent) => {
+    if (searchStore.isSearchEnabled) {
+      return;
+    }
+
+    if (event.key === 'Shift') {
+      event.preventDefault();
+      shiftKeyIsDown = true;
+    }
+  };
+
+  const onKeyUp = (event: KeyboardEvent) => {
+    if (searchStore.isSearchEnabled) {
+      return;
+    }
+
+    if (event.key === 'Shift') {
+      event.preventDefault();
+      shiftKeyIsDown = false;
+    }
+  };
+
+  const handleOnHover = (dayGroup: DayGroup, asset: TimelineAsset) => {
+    if (assetInteraction.selectionActive) {
+      void selectAssetCandidates(asset);
+    }
+    lastAssetMouseEvent = asset;
+  };
+
+  const handleDayGroupSelect = (dayGroup: DayGroup, assets: TimelineAsset[]) => {
+    const group = dayGroup.groupTitle;
+    if (assetInteraction.selectedGroup.has(group)) {
+      assetInteraction.removeGroupFromMultiselectGroup(group);
+      for (const asset of assets) {
+        assetInteraction.removeAssetFromMultiselectGroup(asset.id);
+      }
+    } else {
+      assetInteraction.addGroupToMultiselectGroup(group);
+      for (const asset of assets) {
+        handleSelectAsset(asset);
+      }
+    }
+
+    if (timelineManager.assetCount == assetInteraction.selectedAssets.length) {
+      isSelectingAllAssets.set(true);
+    } else {
+      isSelectingAllAssets.set(false);
+    }
+  };
+
+  const onSelectAssets = async (asset: TimelineAsset) => {
+    if (!asset) {
+      return;
+    }
+    onSelect?.(singleSelect, asset);
+
+    if (singleSelect) {
+      // onScrollToTop();
+
+      return;
+    }
+
+    const rangeSelection = assetInteraction.assetSelectionCandidates.length > 0;
+    const deselect = assetInteraction.hasSelectedAsset(asset.id);
+
+    // Select/deselect already loaded assets
+    if (deselect) {
+      for (const candidate of assetInteraction.assetSelectionCandidates) {
+        assetInteraction.removeAssetFromMultiselectGroup(candidate.id);
+      }
+      assetInteraction.removeAssetFromMultiselectGroup(asset.id);
+    } else {
+      for (const candidate of assetInteraction.assetSelectionCandidates) {
+        handleSelectAsset(candidate);
+      }
+      handleSelectAsset(asset);
+    }
+
+    assetInteraction.clearAssetSelectionCandidates();
+
+    if (assetInteraction.assetSelectionStart && rangeSelection) {
+      let startBucket = timelineManager.getMonthGroupByAssetId(assetInteraction.assetSelectionStart.id);
+      let endBucket = timelineManager.getMonthGroupByAssetId(asset.id);
+
+      if (startBucket === null || endBucket === null) {
+        return;
+      }
+
+      // Select/deselect assets in range (start,end)
+      let started = false;
+      for (const monthGroup of timelineManager.months) {
+        if (monthGroup === endBucket) {
+          break;
+        }
+        if (started) {
+          await timelineManager.loadMonthGroup(monthGroup.yearMonth);
+          for (const asset of monthGroup.assetsIterator()) {
+            if (deselect) {
+              assetInteraction.removeAssetFromMultiselectGroup(asset.id);
+            } else {
+              handleSelectAsset(asset);
+            }
+          }
+        }
+        if (monthGroup === startBucket) {
+          started = true;
+        }
+      }
+
+      // Update date group selection in range [start,end]
+      started = false;
+      for (const monthGroup of timelineManager.months) {
+        if (monthGroup === startBucket) {
+          started = true;
+        }
+        if (started) {
+          // Split month group into day groups and check each group
+          for (const dayGroup of monthGroup.dayGroups) {
+            const dayGroupTitle = dayGroup.groupTitle;
+            if (dayGroup.getAssets().every((a) => assetInteraction.hasSelectedAsset(a.id))) {
+              assetInteraction.addGroupToMultiselectGroup(dayGroupTitle);
+            } else {
+              assetInteraction.removeGroupFromMultiselectGroup(dayGroupTitle);
+            }
+          }
+        }
+        if (monthGroup === endBucket) {
+          break;
+        }
+      }
+    }
+
+    assetInteraction.setAssetSelectionStart(deselect ? null : asset);
+  };
+
+  const selectAssetCandidates = async (endAsset: TimelineAsset) => {
+    if (!shiftKeyIsDown) {
+      return;
+    }
+
+    const startAsset = assetInteraction.assetSelectionStart;
+    if (!startAsset) {
+      return;
+    }
+
+    const assets = assetsSnapshot(await timelineManager.retrieveRange(startAsset, endAsset));
+    assetInteraction.setAssetSelectionCandidates(assets);
+  };
+</script>
+
+<svelte:document onkeydown={onKeyDown} onkeyup={onKeyUp} />
+
+<TimelineMonth
+  {customThumbnailLayout}
+  {singleSelect}
+  {withStacked}
+  {showArchiveIcon}
+  {monthGroup}
+  {timelineManager}
+  {onScrollCompensationMonthInDOM}
+  onHover={handleOnHover}
+  onAssetOpen={handleOnAssetOpen}
+  onAssetSelect={handleAssetSelect}
+  onDayGroupSelect={handleDayGroupSelect}
+  isDayGroupSelected={(dayGroup: DayGroup) => assetInteraction.selectedGroup.has(dayGroup.groupTitle)}
+  isAssetSelected={(asset) => assetInteraction.hasSelectedAsset(asset.id) || timelineManager.albumAssets.has(asset.id)}
+  isAssetSelectionCandidate={(asset) => assetInteraction.hasSelectionCandidate(asset.id)}
+  isAssetDisabled={(asset) => timelineManager.albumAssets.has(asset.id)}
+/>

web/src/lib/components/timeline/internal-components/timeline-asset-viewer.svelte

@@ -0,0 +1,176 @@
+<script lang="ts">
+  import type { Action } from '$lib/components/asset-viewer/actions/action';
+  import { AssetAction } from '$lib/constants';
+  import { authManager } from '$lib/managers/auth-manager.svelte';
+  import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
+  import { assetViewingStore } from '$lib/stores/asset-viewing.store';
+  import { updateStackedAssetInTimeline, updateUnstackedAssetInTimeline } from '$lib/utils/actions';
+  import { navigate } from '$lib/utils/navigation';
+  import { toTimelineAsset } from '$lib/utils/timeline-util';
+  import { getAssetInfo, type AlbumResponseDto, type PersonResponseDto } from '@immich/sdk';
+
+  let { asset: viewingAsset, gridScrollTarget, mutex, preloadAssets } = assetViewingStore;
+
+  interface Props {
+    timelineManager: TimelineManager;
+    showSkeleton: boolean;
+    withStacked?: boolean;
+    isShared?: boolean;
+    album?: AlbumResponseDto | null;
+    person?: PersonResponseDto | null;
+
+    removeAction?:
+      | AssetAction.UNARCHIVE
+      | AssetAction.ARCHIVE
+      | AssetAction.FAVORITE
+      | AssetAction.UNFAVORITE
+      | AssetAction.SET_VISIBILITY_TIMELINE;
+  }
+
+  let {
+    timelineManager,
+    showSkeleton = $bindable(false),
+    removeAction,
+    withStacked = false,
+    isShared = false,
+    album = null,
+    person = null,
+  }: Props = $props();
+
+  const handlePrevious = async () => {
+    const release = await mutex.acquire();
+    const laterAsset = await timelineManager.getLaterAsset($viewingAsset);
+
+    if (laterAsset) {
+      const preloadAsset = await timelineManager.getLaterAsset(laterAsset);
+      const asset = await getAssetInfo({ ...authManager.params, id: laterAsset.id });
+      assetViewingStore.setAsset(asset, preloadAsset ? [preloadAsset] : []);
+      await navigate({ targetRoute: 'current', assetId: laterAsset.id });
+    }
+
+    release();
+    return !!laterAsset;
+  };
+
+  const handleNext = async () => {
+    const release = await mutex.acquire();
+    const earlierAsset = await timelineManager.getEarlierAsset($viewingAsset);
+
+    if (earlierAsset) {
+      const preloadAsset = await timelineManager.getEarlierAsset(earlierAsset);
+      const asset = await getAssetInfo({ ...authManager.params, id: earlierAsset.id });
+      assetViewingStore.setAsset(asset, preloadAsset ? [preloadAsset] : []);
+      await navigate({ targetRoute: 'current', assetId: earlierAsset.id });
+    }
+
+    release();
+    return !!earlierAsset;
+  };
+
+  const handleRandom = async () => {
+    const randomAsset = await timelineManager.getRandomAsset();
+
+    if (randomAsset) {
+      const asset = await getAssetInfo({ ...authManager.params, id: randomAsset.id });
+      assetViewingStore.setAsset(asset);
+      await navigate({ targetRoute: 'current', assetId: randomAsset.id });
+      return asset;
+    }
+  };
+
+  const handleClose = async (asset: { id: string }) => {
+    assetViewingStore.showAssetViewer(false);
+    showSkeleton = true;
+    $gridScrollTarget = { at: asset.id };
+    await navigate({ targetRoute: 'current', assetId: null, assetGridRouteSearchParams: $gridScrollTarget });
+  };
+
+  const handlePreAction = async (action: Action) => {
+    switch (action.type) {
+      case removeAction:
+      case AssetAction.TRASH:
+      case AssetAction.RESTORE:
+      case AssetAction.DELETE:
+      case AssetAction.ARCHIVE:
+      case AssetAction.SET_VISIBILITY_LOCKED:
+      case AssetAction.SET_VISIBILITY_TIMELINE: {
+        // find the next asset to show or close the viewer
+        // eslint-disable-next-line @typescript-eslint/no-unused-expressions
+        (await handleNext()) || (await handlePrevious()) || (await handleClose(action.asset));
+
+        // delete after find the next one
+        timelineManager.removeAssets([action.asset.id]);
+        break;
+      }
+    }
+  };
+  const handleAction = (action: Action) => {
+    switch (action.type) {
+      case AssetAction.ARCHIVE:
+      case AssetAction.UNARCHIVE:
+      case AssetAction.FAVORITE:
+      case AssetAction.UNFAVORITE: {
+        timelineManager.updateAssets([action.asset]);
+        break;
+      }
+
+      case AssetAction.ADD: {
+        timelineManager.addAssets([action.asset]);
+        break;
+      }
+
+      case AssetAction.UNSTACK: {
+        updateUnstackedAssetInTimeline(timelineManager, action.assets);
+        break;
+      }
+      case AssetAction.REMOVE_ASSET_FROM_STACK: {
+        timelineManager.addAssets([toTimelineAsset(action.asset)]);
+        if (action.stack) {
+          //Have to unstack then restack assets in timeline in order to update the stack count in the timeline.
+          updateUnstackedAssetInTimeline(
+            timelineManager,
+            action.stack.assets.map((asset) => toTimelineAsset(asset)),
+          );
+          updateStackedAssetInTimeline(timelineManager, {
+            stack: action.stack,
+            toDeleteIds: action.stack.assets
+              .filter((asset) => asset.id !== action.stack?.primaryAssetId)
+              .map((asset) => asset.id),
+          });
+        }
+        break;
+      }
+      case AssetAction.SET_STACK_PRIMARY_ASSET: {
+        //Have to unstack then restack assets in timeline in order for the currently removed new primary asset to be made visible.
+        updateUnstackedAssetInTimeline(
+          timelineManager,
+          action.stack.assets.map((asset) => toTimelineAsset(asset)),
+        );
+        updateStackedAssetInTimeline(timelineManager, {
+          stack: action.stack,
+          toDeleteIds: action.stack.assets
+            .filter((asset) => asset.id !== action.stack.primaryAssetId)
+            .map((asset) => asset.id),
+        });
+        break;
+      }
+    }
+  };
+</script>
+
+{#await import('../../asset-viewer/asset-viewer.svelte') then { default: AssetViewer }}
+  <AssetViewer
+    {withStacked}
+    asset={$viewingAsset}
+    preloadAssets={$preloadAssets}
+    {isShared}
+    {album}
+    {person}
+    preAction={handlePreAction}
+    onAction={handleAction}
+    onPrevious={handlePrevious}
+    onNext={handleNext}
+    onRandom={handleRandom}
+    onClose={handleClose}
+  />
+{/await}

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

@@ -0,0 +1,101 @@
+<script lang="ts">
+  import Portal from '$lib/components/shared-components/portal/portal.svelte';
+  import TimelineKeyboardActions from '$lib/components/timeline/actions/timeline-keyboard-actions.svelte';
+  import BaseTimeline from '$lib/components/timeline/base-components/base-timeline.svelte';
+  import TimelineAssetViewer from '$lib/components/timeline/internal-components/timeline-asset-viewer.svelte';
+  import type { AssetAction } from '$lib/constants';
+  import type { DayGroup } from '$lib/managers/timeline-manager/day-group.svelte';
+  import type { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
+  import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
+  import type { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
+  import { assetViewingStore } from '$lib/stores/asset-viewing.store';
+  import type { AlbumResponseDto, PersonResponseDto } from '@immich/sdk';
+  import type { Snippet } from 'svelte';
+
+  let { isViewing: showAssetViewer } = assetViewingStore;
+
+  interface Props {
+    customThumbnailLayout?: Snippet<[TimelineAsset]>;
+    isSelectionMode?: boolean;
+    singleSelect?: boolean;
+    /** `true` if this asset grid is responds to navigation events; if `true`, then look at the
+     `AssetViewingStore.gridScrollTarget` and load and scroll to the asset specified, and
+     additionally, update the page location/url with the asset as the asset-grid is scrolled */
+    enableRouting: boolean;
+    timelineManager: TimelineManager;
+    assetInteraction: AssetInteraction;
+    removeAction?:
+      | AssetAction.UNARCHIVE
+      | AssetAction.ARCHIVE
+      | AssetAction.FAVORITE
+      | AssetAction.UNFAVORITE
+      | AssetAction.SET_VISIBILITY_TIMELINE;
+    withStacked?: boolean;
+    showArchiveIcon?: boolean;
+    isShared?: boolean;
+    album?: AlbumResponseDto | null;
+    person?: PersonResponseDto | null;
+    isShowDeleteConfirmation?: boolean;
+    onAssetOpen?: (dayGroup: DayGroup, asset: TimelineAsset, defaultAssetOpen: () => void) => void;
+    onSelect?: (asset: TimelineAsset) => void;
+    onEscape?: () => void;
+    children?: Snippet;
+    empty?: Snippet;
+  }
+
+  let {
+    customThumbnailLayout,
+    isSelectionMode = false,
+    singleSelect = false,
+    enableRouting,
+    timelineManager = $bindable(),
+    assetInteraction,
+    removeAction,
+    withStacked = false,
+    showArchiveIcon = false,
+    isShared = false,
+    album = null,
+    person = null,
+    isShowDeleteConfirmation = $bindable(false),
+    onAssetOpen,
+    onSelect = () => {},
+    onEscape = () => {},
+    children,
+    empty,
+  }: Props = $props();
+
+  let viewer: BaseTimeline | undefined = $state();
+  let showSkeleton: boolean = $state(true);
+</script>
+
+<BaseTimeline
+  bind:this={viewer}
+  {customThumbnailLayout}
+  {isSelectionMode}
+  {singleSelect}
+  {enableRouting}
+  {timelineManager}
+  {assetInteraction}
+  {withStacked}
+  {showArchiveIcon}
+  {isShowDeleteConfirmation}
+  {showSkeleton}
+  {onAssetOpen}
+  {onSelect}
+  {children}
+  {empty}
+/>
+
+<TimelineKeyboardActions
+  scrollToAsset={(asset) => viewer?.scrollToAsset(asset) ?? false}
+  {timelineManager}
+  {assetInteraction}
+  bind:isShowDeleteConfirmation
+  {onEscape}
+/>
+
+<Portal target="body">
+  {#if $showAssetViewer}
+    <TimelineAssetViewer bind:showSkeleton {timelineManager} {removeAction} {withStacked} {isShared} {album} {person} />
+  {/if}
+</Portal>

web/src/lib/managers/timeline-manager/day-group.svelte.ts

@@ -13,6 +13,7 @@ export class DayGroup {
   readonly monthGroup: MonthGroup;
   readonly index: number;
   readonly groupTitle: string;
+  readonly groupTitleFull: string;
   readonly day: number;
   viewerAssets: ViewerAsset[] = $state([]);
 
@@ -26,11 +27,12 @@ export class DayGroup {
   #col = $state(0);
   #deferredLayout = false;
 
-  constructor(monthGroup: MonthGroup, index: number, day: number, groupTitle: string) {
+  constructor(monthGroup: MonthGroup, index: number, day: number, groupTitle: string, groupTitleFull: string) {
     this.index = index;
     this.monthGroup = monthGroup;
     this.day = day;
     this.groupTitle = groupTitle;
+    this.groupTitleFull = groupTitleFull;
   }
 
   get top() {

web/src/lib/managers/timeline-manager/internal/search-support.svelte.ts

@@ -143,3 +143,24 @@ export function findMonthGroupForDate(timelineManager: TimelineManager, targetYe
     }
   }
 }
+
+export function findClosestGroupForDate(timelineManager: TimelineManager, targetYearMonth: TimelineYearMonth) {
+  let closestMonth: MonthGroup | undefined;
+  let minDifference = Number.MAX_SAFE_INTEGER;
+
+  for (const month of timelineManager.months) {
+    const { year, month: monthNum } = month.yearMonth;
+
+    // Calculate the absolute difference in months
+    const yearDiff = Math.abs(year - targetYearMonth.year);
+    const monthDiff = Math.abs(monthNum - targetYearMonth.month);
+    const totalDiff = yearDiff * 12 + monthDiff;
+
+    if (totalDiff < minDifference) {
+      minDifference = totalDiff;
+      closestMonth = month;
+    }
+  }
+
+  return closestMonth;
+}

web/src/lib/managers/timeline-manager/month-group.svelte.ts

@@ -4,6 +4,7 @@ import { CancellableTask } from '$lib/utils/cancellable-task';
 import { handleError } from '$lib/utils/handle-error';
 import {
   formatGroupTitle,
+  formatGroupTitleFull,
   formatMonthGroupTitle,
   fromTimelinePlainDate,
   fromTimelinePlainDateTime,
@@ -222,7 +223,8 @@ export class MonthGroup {
       addContext.setDayGroup(dayGroup, localDateTime);
     } else {
       const groupTitle = formatGroupTitle(fromTimelinePlainDate(localDateTime));
-      dayGroup = new DayGroup(this, this.dayGroups.length, localDateTime.day, groupTitle);
+      const groupTitleFull = formatGroupTitleFull(fromTimelinePlainDate(localDateTime));
+      dayGroup = new DayGroup(this, this.dayGroups.length, localDateTime.day, groupTitle, groupTitleFull);
       this.dayGroups.push(dayGroup);
       addContext.setDayGroup(dayGroup, localDateTime);
       addContext.newDayGroups.add(dayGroup);

web/src/lib/managers/timeline-manager/timeline-manager.svelte.ts

@@ -16,6 +16,7 @@ import {
   runAssetOperation,
 } from '$lib/managers/timeline-manager/internal/operations-support.svelte';
 import {
+  findClosestGroupForDate,
   findMonthGroupForAsset as findMonthGroupForAssetUtil,
   findMonthGroupForDate,
   getAssetWithOffset,
@@ -41,6 +42,7 @@ export class TimelineManager {
   isInitialized = $state(false);
   months: MonthGroup[] = $state([]);
   topSectionHeight = $state(0);
+  bottomSectionHeight = $state(60);
   timelineHeight = $derived(this.months.reduce((accumulator, b) => accumulator + b.height, 0) + this.topSectionHeight);
   assetCount = $derived(this.months.reduce((accumulator, b) => accumulator + b.assetsCount, 0));
 
@@ -523,9 +525,13 @@ export class TimelineManager {
   }
 
   async getClosestAssetToDate(dateTime: TimelineDateTime) {
-    const monthGroup = findMonthGroupForDate(this, dateTime);
+    let monthGroup = findMonthGroupForDate(this, dateTime);
     if (!monthGroup) {
-      return;
+      // if exact match not found, find closest
+      monthGroup = findClosestGroupForDate(this, dateTime);
+      if (!monthGroup) {
+        return;
+      }
     }
     await this.loadMonthGroup(dateTime, { cancelable: false });
     const asset = monthGroup.findClosest(dateTime);
@@ -552,4 +558,13 @@ export class TimelineManager {
   getAssetOrder() {
     return this.#options.order ?? AssetOrder.Desc;
   }
+
+  getMaxScrollPercent() {
+    const totalHeight = this.timelineHeight + this.bottomSectionHeight + this.topSectionHeight;
+    return (totalHeight - this.viewportHeight) / totalHeight;
+  }
+
+  getMaxScroll() {
+    return this.topSectionHeight + this.bottomSectionHeight + (this.timelineHeight - this.viewportHeight);
+  }
 }

web/src/lib/modals/ShortcutsModal.svelte

@@ -28,6 +28,7 @@
         { key: ['D', 'd'], action: $t('previous_or_next_day') },
         { key: ['M', 'm'], action: $t('previous_or_next_month') },
         { key: ['Y', 'y'], action: $t('previous_or_next_year') },
+        { key: ['g'], action: $t('navigate_to_time') },
         { key: ['x'], action: $t('select') },
         { key: ['Esc'], action: $t('back_close_deselect') },
         { key: ['Ctrl', 'k'], action: $t('search_your_photos') },

web/src/lib/utils/timeline-util.ts

@@ -23,11 +23,12 @@ export type TimelineDateTime = TimelineDate & {
   millisecond: number;
 };
 
-export type ScrubberListener = (
-  scrubberMonth: { year: number; month: number },
-  overallScrollPercent: number,
-  scrubberMonthScrollPercent: number,
-) => void | Promise<void>;
+export type ScrubberListener = (scrubberData: {
+  scrubberMonth: { year: number; month: number };
+  overallScrollPercent: number;
+  scrubberMonthScrollPercent: number;
+  scrollToFunction?: (top: number) => void;
+}) => void | Promise<void>;
 
 // used for AssetResponseDto.dateTimeOriginal, amongst others
 export const fromISODateTime = (isoDateTime: string, timeZone: string): DateTime<true> =>
@@ -151,6 +152,14 @@ export function formatGroupTitle(_date: DateTime): string {
   return getDateLocaleString(date, { locale: get(locale) });
 }
 
+export const formatGroupTitleFull = (_date: DateTime): string => {
+  if (!_date.isValid) {
+    return _date.toString();
+  }
+  const date = _date as DateTime<true>;
+  return getDateLocaleString(date);
+};
+
 export const getDateLocaleString = (date: DateTime, opts?: LocaleOptions): string =>
   date.toLocaleString(DateTime.DATE_MED_WITH_WEEKDAY, opts);
 
@@ -234,3 +243,79 @@ export function setDifference<T>(setA: Set<T>, setB: Set<T>): SvelteSet<T> {
   }
   return result;
 }
+
+export interface MonthGroupForSearch {
+  yearMonth: TimelineYearMonth;
+  top: number;
+  height: number;
+}
+
+export interface BinarySearchResult {
+  month: TimelineYearMonth;
+  monthScrollPercent: number;
+}
+
+export function findMonthAtScrollPosition(
+  months: MonthGroupForSearch[],
+  scrollPosition: number,
+  maxScrollPercent: number,
+): BinarySearchResult | null {
+  const SUBPIXEL_TOLERANCE = -1; // Tolerance for scroll position checks
+  const NEAR_END_THRESHOLD = 0.9999; // Threshold for detecting near-end of month
+
+  if (months.length === 0) {
+    return null;
+  }
+
+  // Check if we're before the first month
+  const firstMonthTop = months[0].top * maxScrollPercent;
+  if (scrollPosition < firstMonthTop - SUBPIXEL_TOLERANCE) {
+    return null;
+  }
+
+  // Check if we're after the last month
+  const lastMonth = months.at(-1)!;
+  const lastMonthBottom = (lastMonth.top + lastMonth.height) * maxScrollPercent;
+  if (scrollPosition >= lastMonthBottom - SUBPIXEL_TOLERANCE) {
+    return null;
+  }
+
+  // Binary search to find the month containing the scroll position
+  let left = 0;
+  let right = months.length - 1;
+
+  while (left <= right) {
+    const mid = Math.floor((left + right) / 2);
+    const month = months[mid];
+    const monthTop = month.top * maxScrollPercent;
+    const monthBottom = monthTop + month.height * maxScrollPercent;
+
+    if (scrollPosition >= monthTop - SUBPIXEL_TOLERANCE && scrollPosition < monthBottom - SUBPIXEL_TOLERANCE) {
+      // Found the month containing the scroll position
+      const distanceIntoMonth = scrollPosition - monthTop;
+      const monthScrollPercent = Math.max(0, distanceIntoMonth / (month.height * maxScrollPercent));
+
+      // Handle month boundary edge case
+      if (monthScrollPercent > NEAR_END_THRESHOLD && mid < months.length - 1) {
+        return {
+          month: months[mid + 1].yearMonth,
+          monthScrollPercent: 0,
+        };
+      }
+
+      return {
+        month: month.yearMonth,
+        monthScrollPercent,
+      };
+    }
+
+    if (scrollPosition < monthTop) {
+      right = mid - 1;
+    } else {
+      left = mid + 1;
+    }
+  }
+
+  // Shouldn't reach here, but return null if we do
+  return null;
+}

web/src/routes/(user)/albums/[albumId=id]/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -22,7 +22,6 @@
   import SelectAllAssets from '$lib/components/photos-page/actions/select-all-assets.svelte';
   import SetVisibilityAction from '$lib/components/photos-page/actions/set-visibility-action.svelte';
   import TagAction from '$lib/components/photos-page/actions/tag-action.svelte';
-  import AssetGrid from '$lib/components/photos-page/asset-grid.svelte';
   import AssetSelectControlBar from '$lib/components/photos-page/asset-select-control-bar.svelte';
   import ButtonContextMenu from '$lib/components/shared-components/context-menu/button-context-menu.svelte';
   import MenuOption from '$lib/components/shared-components/context-menu/menu-option.svelte';
@@ -32,6 +31,7 @@
     notificationController,
   } from '$lib/components/shared-components/notification/notification';
   import UserAvatar from '$lib/components/shared-components/user-avatar.svelte';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { AlbumPageViewMode, AppRoute } from '$lib/constants';
   import { activityManager } from '$lib/managers/activity-manager.svelte';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
@@ -443,7 +443,7 @@
 <div class="flex overflow-hidden" use:scrollMemoryClearer={{ routeStartsWith: AppRoute.ALBUMS }}>
   <div class="relative w-full shrink">
     <main class="relative h-dvh overflow-hidden px-2 md:px-6 max-md:pt-(--navbar-height-md) pt-(--navbar-height)">
-      <AssetGrid
+      <Timeline
         enableRouting={viewMode === AlbumPageViewMode.SELECT_ASSETS ? false : true}
         {album}
         {timelineManager}
@@ -544,7 +544,7 @@
             </section>
           {/if}
         {/if}
-      </AssetGrid>
+      </Timeline>
 
       {#if showActivityStatus && !activityManager.isLoading}
         <div class="absolute z-2 bottom-0 end-0 mb-6 me-6 justify-self-end">

web/src/routes/(user)/archive/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -7,13 +7,13 @@
   import DownloadAction from '$lib/components/photos-page/actions/download-action.svelte';
   import FavoriteAction from '$lib/components/photos-page/actions/favorite-action.svelte';
   import SelectAllAssets from '$lib/components/photos-page/actions/select-all-assets.svelte';
-  import AssetGrid from '$lib/components/photos-page/asset-grid.svelte';
   import AssetSelectControlBar from '$lib/components/photos-page/asset-select-control-bar.svelte';
   import ButtonContextMenu from '$lib/components/shared-components/context-menu/button-context-menu.svelte';
   import EmptyPlaceholder from '$lib/components/shared-components/empty-placeholder.svelte';
   import { AssetAction } from '$lib/constants';
 
   import SetVisibilityAction from '$lib/components/photos-page/actions/set-visibility-action.svelte';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
   import { AssetVisibility } from '@immich/sdk';
@@ -47,7 +47,7 @@
 </script>
 
 <UserPageLayout hideNavbar={assetInteraction.selectionActive} title={data.meta.title} scrollbar={false}>
-  <AssetGrid
+  <Timeline
     enableRouting={true}
     {timelineManager}
     {assetInteraction}
@@ -57,7 +57,7 @@
     {#snippet empty()}
       <EmptyPlaceholder text={$t('no_archived_assets_message')} />
     {/snippet}
-  </AssetGrid>
+  </Timeline>
 </UserPageLayout>
 
 {#if assetInteraction.selectionActive}

web/src/routes/(user)/favorites/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -12,10 +12,10 @@
   import SelectAllAssets from '$lib/components/photos-page/actions/select-all-assets.svelte';
   import SetVisibilityAction from '$lib/components/photos-page/actions/set-visibility-action.svelte';
   import TagAction from '$lib/components/photos-page/actions/tag-action.svelte';
-  import AssetGrid from '$lib/components/photos-page/asset-grid.svelte';
   import AssetSelectControlBar from '$lib/components/photos-page/asset-select-control-bar.svelte';
   import ButtonContextMenu from '$lib/components/shared-components/context-menu/button-context-menu.svelte';
   import EmptyPlaceholder from '$lib/components/shared-components/empty-placeholder.svelte';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { AssetAction } from '$lib/constants';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
@@ -51,7 +51,7 @@
 </script>
 
 <UserPageLayout hideNavbar={assetInteraction.selectionActive} title={data.meta.title} scrollbar={false}>
-  <AssetGrid
+  <Timeline
     enableRouting={true}
     withStacked={true}
     {timelineManager}
@@ -62,7 +62,7 @@
     {#snippet empty()}
       <EmptyPlaceholder text={$t('no_favorites_message')} />
     {/snippet}
-  </AssetGrid>
+  </Timeline>
 </UserPageLayout>
 
 <!-- Multiselection mode app bar -->

web/src/routes/(user)/locked/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -7,10 +7,10 @@
   import DownloadAction from '$lib/components/photos-page/actions/download-action.svelte';
   import SelectAllAssets from '$lib/components/photos-page/actions/select-all-assets.svelte';
   import SetVisibilityAction from '$lib/components/photos-page/actions/set-visibility-action.svelte';
-  import AssetGrid from '$lib/components/photos-page/asset-grid.svelte';
   import AssetSelectControlBar from '$lib/components/photos-page/asset-select-control-bar.svelte';
   import ButtonContextMenu from '$lib/components/shared-components/context-menu/button-context-menu.svelte';
   import EmptyPlaceholder from '$lib/components/shared-components/empty-placeholder.svelte';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { AppRoute, AssetAction } from '$lib/constants';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
@@ -58,7 +58,7 @@
     </Button>
   {/snippet}
 
-  <AssetGrid
+  <Timeline
     enableRouting={true}
     {timelineManager}
     {assetInteraction}
@@ -68,7 +68,7 @@
     {#snippet empty()}
       <EmptyPlaceholder text={$t('no_locked_photos_message')} title={$t('nothing_here_yet')} />
     {/snippet}
-  </AssetGrid>
+  </Timeline>
 </UserPageLayout>
 
 <!-- Multi-selection mode app bar -->

web/src/routes/(user)/partners/[userId]/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -3,10 +3,10 @@
   import AddToAlbum from '$lib/components/photos-page/actions/add-to-album.svelte';
   import CreateSharedLink from '$lib/components/photos-page/actions/create-shared-link.svelte';
   import DownloadAction from '$lib/components/photos-page/actions/download-action.svelte';
-  import AssetGrid from '$lib/components/photos-page/asset-grid.svelte';
   import AssetSelectControlBar from '$lib/components/photos-page/asset-select-control-bar.svelte';
   import ButtonContextMenu from '$lib/components/shared-components/context-menu/button-context-menu.svelte';
   import ControlAppBar from '$lib/components/shared-components/control-app-bar.svelte';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { AppRoute } from '$lib/constants';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
@@ -43,7 +43,7 @@
 </script>
 
 <main class="relative h-dvh overflow-hidden px-2 md:px-6 max-md:pt-(--navbar-height-md) pt-(--navbar-height)">
-  <AssetGrid enableRouting={true} {timelineManager} {assetInteraction} onEscape={handleEscape} />
+  <Timeline enableRouting={true} {timelineManager} {assetInteraction} onEscape={handleEscape} />
 </main>
 
 {#if assetInteraction.selectionActive}

web/src/routes/(user)/people/[personId]/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -20,7 +20,6 @@
   import SelectAllAssets from '$lib/components/photos-page/actions/select-all-assets.svelte';
   import SetVisibilityAction from '$lib/components/photos-page/actions/set-visibility-action.svelte';
   import TagAction from '$lib/components/photos-page/actions/tag-action.svelte';
-  import AssetGrid from '$lib/components/photos-page/asset-grid.svelte';
   import AssetSelectControlBar from '$lib/components/photos-page/asset-select-control-bar.svelte';
   import ButtonContextMenu from '$lib/components/shared-components/context-menu/button-context-menu.svelte';
   import MenuOption from '$lib/components/shared-components/context-menu/menu-option.svelte';
@@ -30,6 +29,7 @@
     NotificationType,
     notificationController,
   } from '$lib/components/shared-components/notification/notification';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { AppRoute, PersonPageViewMode, QueryParameter, SessionStorageKey } from '$lib/constants';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
@@ -386,7 +386,7 @@
   }}
 >
   {#key person.id}
-    <AssetGrid
+    <Timeline
       enableRouting={true}
       {person}
       {timelineManager}
@@ -498,7 +498,7 @@
           {/if}
         </div>
       {/if}
-    </AssetGrid>
+    </Timeline>
   {/key}
 </main>
 

web/src/routes/(user)/photos/[[assetId=id]]/+page.svelte

@@ -16,11 +16,11 @@
   import SetVisibilityAction from '$lib/components/photos-page/actions/set-visibility-action.svelte';
   import StackAction from '$lib/components/photos-page/actions/stack-action.svelte';
   import TagAction from '$lib/components/photos-page/actions/tag-action.svelte';
-  import AssetGrid from '$lib/components/photos-page/asset-grid.svelte';
   import AssetSelectControlBar from '$lib/components/photos-page/asset-select-control-bar.svelte';
   import MemoryLane from '$lib/components/photos-page/memory-lane.svelte';
   import ButtonContextMenu from '$lib/components/shared-components/context-menu/button-context-menu.svelte';
   import EmptyPlaceholder from '$lib/components/shared-components/empty-placeholder.svelte';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { AssetAction } from '$lib/constants';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
@@ -89,7 +89,7 @@
 </script>
 
 <UserPageLayout hideNavbar={assetInteraction.selectionActive} showUploadButton scrollbar={false}>
-  <AssetGrid
+  <Timeline
     enableRouting={true}
     {timelineManager}
     {assetInteraction}
@@ -103,7 +103,7 @@
     {#snippet empty()}
       <EmptyPlaceholder text={$t('no_assets_message')} onClick={() => openFileUploadDialog()} />
     {/snippet}
-  </AssetGrid>
+  </Timeline>
 </UserPageLayout>
 
 {#if assetInteraction.selectionActive}

web/src/routes/(user)/tags/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -2,11 +2,11 @@
   import { goto } from '$app/navigation';
   import SkipLink from '$lib/components/elements/buttons/skip-link.svelte';
   import UserPageLayout, { headerId } from '$lib/components/layouts/user-page-layout.svelte';
-  import AssetGrid from '$lib/components/photos-page/asset-grid.svelte';
   import Breadcrumbs from '$lib/components/shared-components/tree/breadcrumbs.svelte';
   import TreeItemThumbnails from '$lib/components/shared-components/tree/tree-item-thumbnails.svelte';
   import TreeItems from '$lib/components/shared-components/tree/tree-items.svelte';
   import Sidebar from '$lib/components/sidebar/sidebar.svelte';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { AppRoute, AssetAction, QueryParameter } from '$lib/constants';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import TagCreateModal from '$lib/modals/TagCreateModal.svelte';
@@ -117,11 +117,11 @@
 
   <section class="mt-2 h-[calc(100%-(--spacing(20)))] overflow-auto immich-scrollbar">
     {#if tag.hasAssets}
-      <AssetGrid enableRouting={true} {timelineManager} {assetInteraction} removeAction={AssetAction.UNARCHIVE}>
+      <Timeline enableRouting={true} {timelineManager} {assetInteraction} removeAction={AssetAction.UNARCHIVE}>
         {#snippet empty()}
           <TreeItemThumbnails items={tag.children} icon={mdiTag} onClick={handleNavigation} />
         {/snippet}
-      </AssetGrid>
+      </Timeline>
     {:else}
       <TreeItemThumbnails items={tag.children} icon={mdiTag} onClick={handleNavigation} />
     {/if}

web/src/routes/(user)/trash/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -5,13 +5,13 @@
   import DeleteAssets from '$lib/components/photos-page/actions/delete-assets.svelte';
   import RestoreAssets from '$lib/components/photos-page/actions/restore-assets.svelte';
   import SelectAllAssets from '$lib/components/photos-page/actions/select-all-assets.svelte';
-  import AssetGrid from '$lib/components/photos-page/asset-grid.svelte';
   import AssetSelectControlBar from '$lib/components/photos-page/asset-select-control-bar.svelte';
   import EmptyPlaceholder from '$lib/components/shared-components/empty-placeholder.svelte';
   import {
     notificationController,
     NotificationType,
   } from '$lib/components/shared-components/notification/notification';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { AppRoute } from '$lib/constants';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
@@ -116,14 +116,14 @@
       </HStack>
     {/snippet}
 
-    <AssetGrid enableRouting={true} {timelineManager} {assetInteraction} onEscape={handleEscape}>
+    <Timeline enableRouting={true} {timelineManager} {assetInteraction} onEscape={handleEscape}>
       <p class="font-medium text-gray-500/60 dark:text-gray-300/60 p-4">
         {$t('trashed_items_will_be_permanently_deleted_after', { values: { days: $serverConfig.trashDays } })}
       </p>
       {#snippet empty()}
         <EmptyPlaceholder text={$t('trash_no_results_message')} src={empty3Url} />
       {/snippet}
-    </AssetGrid>
+    </Timeline>
   </UserPageLayout>
 {/if}
 

web/src/routes/(user)/utilities/geolocation/+page.svelte

@@ -1,8 +1,8 @@
 <script lang="ts">
   import UserPageLayout from '$lib/components/layouts/user-page-layout.svelte';
-  import AssetGrid from '$lib/components/photos-page/asset-grid.svelte';
   import ChangeLocation from '$lib/components/shared-components/change-location.svelte';
   import EmptyPlaceholder from '$lib/components/shared-components/empty-placeholder.svelte';
+  import Timeline from '$lib/components/timeline/timeline.svelte';
   import { AssetAction } from '$lib/constants';
   import { authManager } from '$lib/managers/auth-manager.svelte';
   import type { DayGroup } from '$lib/managers/timeline-manager/day-group.svelte';
@@ -110,17 +110,7 @@
     return !!asset.latitude && !!asset.longitude;
   };
 
-  const handleThumbnailClick = (
-    asset: TimelineAsset,
-    timelineManager: TimelineManager,
-    dayGroup: DayGroup,
-    onClick: (
-      timelineManager: TimelineManager,
-      assets: TimelineAsset[],
-      groupTitle: string,
-      asset: TimelineAsset,
-    ) => void,
-  ) => {
+  const handleOnAssetOpen = (dayGroup: DayGroup, asset: TimelineAsset, defaultAssetOpen: () => void) => {
     if (hasGps(asset)) {
       locationUpdated = true;
       setTimeout(() => {
@@ -128,9 +118,9 @@
       }, 1500);
       location = { latitude: asset.latitude!, longitude: asset.longitude! };
       void setQueryValue('at', asset.id);
-    } else {
-      onClick(timelineManager, dayGroup.getAssets(), dayGroup.groupTitle, asset);
+      return;
     }
+    defaultAssetOpen();
   };
 </script>
 
@@ -185,7 +175,7 @@
     </div>
   {/if}
 
-  <AssetGrid
+  <Timeline
     isSelectionMode={true}
     enableRouting={true}
     {timelineManager}
@@ -193,9 +183,9 @@
     removeAction={AssetAction.ARCHIVE}
     onEscape={handleEscape}
     withStacked
-    onThumbnailClick={handleThumbnailClick}
+    onAssetOpen={handleOnAssetOpen}
   >
-    {#snippet customLayout(asset: TimelineAsset)}
+    {#snippet customThumbnailLayout(asset: TimelineAsset)}
       {#if hasGps(asset)}
         <div class="absolute bottom-1 end-3 px-4 py-1 rounded-xl text-xs transition-colors bg-success text-black">
           {asset.city || $t('gps')}
@@ -209,5 +199,5 @@
     {#snippet empty()}
       <EmptyPlaceholder text={$t('no_assets_message')} onClick={() => {}} />
     {/snippet}
-  </AssetGrid>
+  </Timeline>
 </UserPageLayout>