feat(web): add hero transition for 'View in Timeline' action

Adds a smooth view transition when navigating from the asset viewer or
memory page to the timeline via 'View in Timeline'. Extracts the shared
hero overlay logic into navigateToTimeline() in transition-utils.

Change-Id: If96174ab5c34b5ecf454bb2c09c7a5866a6a6964

e2e/src/ui/generators/timeline.ts

@@ -20,7 +20,7 @@ export {
   toColumnarFormat,
 } from './timeline/rest-response';
 
-export type { Changes } from './timeline/rest-response';
+export type { Changes, FaceData } from './timeline/rest-response';
 
 export { randomImage, randomImageFromString, randomPreview, randomThumbnail } from './timeline/images';
 

e2e/src/ui/generators/timeline/rest-response.ts

@@ -7,8 +7,10 @@ import {
   AssetVisibility,
   UserAvatarColor,
   type AlbumResponseDto,
+  type AssetFaceWithoutPersonResponseDto,
   type AssetResponseDto,
   type ExifResponseDto,
+  type PersonWithFacesResponseDto,
   type TimeBucketAssetResponseDto,
   type TimeBucketsResponseDto,
   type UserResponseDto,
@@ -284,7 +286,16 @@ const createDefaultOwner = (ownerId: string) => {
  * Convert a TimelineAssetConfig to a full AssetResponseDto
  * This matches the response from GET /api/assets/:id
  */
-export function toAssetResponseDto(asset: MockTimelineAsset, owner?: UserResponseDto): AssetResponseDto {
+export type FaceData = {
+  people: PersonWithFacesResponseDto[];
+  unassignedFaces: AssetFaceWithoutPersonResponseDto[];
+};
+
+export function toAssetResponseDto(
+  asset: MockTimelineAsset,
+  owner?: UserResponseDto,
+  faceData?: FaceData,
+): AssetResponseDto {
   const now = new Date().toISOString();
 
   // Default owner if not provided
@@ -338,8 +349,8 @@ export function toAssetResponseDto(asset: MockTimelineAsset, owner?: UserRespons
     exifInfo,
     livePhotoVideoId: asset.livePhotoVideoId,
     tags: [],
-    people: [],
+    people: faceData?.people ?? [],
-    unassignedFaces: [],
+    unassignedFaces: faceData?.unassignedFaces ?? [],
     stack: asset.stack,
     isOffline: false,
     hasMetadata: true,

e2e/src/ui/mock-network/face-editor-network.ts

@@ -1,5 +1,6 @@
+import type { AssetFaceResponseDto, AssetResponseDto, PersonWithFacesResponseDto, SourceType } from '@immich/sdk';
 import { BrowserContext } from '@playwright/test';
-import { randomThumbnail } from 'src/ui/generators/timeline';
+import { type FaceData, randomThumbnail } from 'src/ui/generators/timeline';
 
 // Minimal valid H.264 MP4 (8x8px, 1 frame) that browsers can decode to get videoWidth/videoHeight
 const MINIMAL_MP4_BASE64 =
@@ -125,3 +126,84 @@ export const setupFaceEditorMockApiRoutes = async (
     });
   });
 };
+
+export type MockFaceSpec = {
+  personId: string;
+  personName: string;
+  faceId: string;
+  boundingBoxX1: number;
+  boundingBoxY1: number;
+  boundingBoxX2: number;
+  boundingBoxY2: number;
+};
+
+const toPersonResponseDto = (spec: MockFaceSpec) => ({
+  id: spec.personId,
+  name: spec.personName,
+  birthDate: null,
+  isHidden: false,
+  thumbnailPath: `/upload/thumbs/${spec.personId}.jpeg`,
+  updatedAt: '2025-01-01T00:00:00.000Z',
+});
+
+const toBoundingBox = (spec: MockFaceSpec, imageWidth: number, imageHeight: number) => ({
+  id: spec.faceId,
+  imageWidth,
+  imageHeight,
+  boundingBoxX1: spec.boundingBoxX1,
+  boundingBoxY1: spec.boundingBoxY1,
+  boundingBoxX2: spec.boundingBoxX2,
+  boundingBoxY2: spec.boundingBoxY2,
+});
+
+export const createMockFaceData = (specs: MockFaceSpec[], imageWidth: number, imageHeight: number): FaceData => {
+  const people: PersonWithFacesResponseDto[] = specs.map((spec) => ({
+    ...toPersonResponseDto(spec),
+    faces: [toBoundingBox(spec, imageWidth, imageHeight)],
+  }));
+
+  return { people, unassignedFaces: [] };
+};
+
+export const createMockAssetFaces = (
+  specs: MockFaceSpec[],
+  imageWidth: number,
+  imageHeight: number,
+): AssetFaceResponseDto[] => {
+  return specs.map((spec) => ({
+    ...toBoundingBox(spec, imageWidth, imageHeight),
+    person: toPersonResponseDto(spec),
+    sourceType: 'machine-learning' as SourceType,
+  }));
+};
+
+export const setupGetFacesMockApiRoute = async (context: BrowserContext, faces: AssetFaceResponseDto[]) => {
+  await context.route('**/api/faces?*', async (route, request) => {
+    if (request.method() !== 'GET') {
+      return route.fallback();
+    }
+    return route.fulfill({
+      status: 200,
+      contentType: 'application/json',
+      json: faces,
+    });
+  });
+};
+
+export const setupFaceOverlayMockApiRoutes = async (context: BrowserContext, assetDto: AssetResponseDto) => {
+  await context.route('**/api/assets/*', async (route, request) => {
+    if (request.method() !== 'GET') {
+      return route.fallback();
+    }
+    const url = new URL(request.url());
+    const assetId = url.pathname.split('/').at(-1);
+    if (assetId !== assetDto.id) {
+      return route.fallback();
+    }
+    return route.fulfill({
+      status: 200,
+      contentType: 'application/json',
+      json: assetDto,
+    });
+  });
+};

e2e/src/ui/mock-network/ocr-network.ts

@@ -0,0 +1,55 @@
+import { faker } from '@faker-js/faker';
+import type { AssetOcrResponseDto } from '@immich/sdk';
+import { BrowserContext } from '@playwright/test';
+
+export type MockOcrBox = {
+  text: string;
+  x1: number;
+  y1: number;
+  x2: number;
+  y2: number;
+  x3: number;
+  y3: number;
+  x4: number;
+  y4: number;
+};
+
+export const createMockOcrData = (assetId: string, boxes: MockOcrBox[]): AssetOcrResponseDto[] => {
+  return boxes.map((box) => ({
+    id: faker.string.uuid(),
+    assetId,
+    x1: box.x1,
+    y1: box.y1,
+    x2: box.x2,
+    y2: box.y2,
+    x3: box.x3,
+    y3: box.y3,
+    x4: box.x4,
+    y4: box.y4,
+    boxScore: 0.95,
+    textScore: 0.9,
+    text: box.text,
+  }));
+};
+
+export const setupOcrMockApiRoutes = async (
+  context: BrowserContext,
+  ocrDataByAssetId: Map<string, AssetOcrResponseDto[]>,
+) => {
+  await context.route('**/assets/*/ocr', async (route, request) => {
+    if (request.method() !== 'GET') {
+      return route.fallback();
+    }
+    const url = new URL(request.url());
+    const segments = url.pathname.split('/');
+    const assetIdIndex = segments.indexOf('assets') + 1;
+    const assetId = segments[assetIdIndex];
+
+    const ocrData = ocrDataByAssetId.get(assetId) ?? [];
+    return route.fulfill({
+      status: 200,
+      contentType: 'application/json',
+      json: ocrData,
+    });
+  });
+};

e2e/src/ui/specs/asset-viewer/face-editor.e2e-spec.ts

@@ -10,16 +10,21 @@ import { assetViewerUtils } from '../timeline/utils';
 import { setupAssetViewerFixture } from './utils';
 
 const waitForSelectorTransition = async (page: Page) => {
-  await page.waitForFunction(
+  await expect(page.locator('#face-editor-data')).toHaveAttribute('data-face-width', /^[1-9]/, { timeout: 10_000 });
-    () => {
+  await page.locator('#face-selector').evaluate(
-      const selector = document.querySelector('#face-selector') as HTMLElement | null;
+    (el) =>
-      if (!selector) {
+      new Promise<void>((resolve) => {
-        return false;
+        requestAnimationFrame(() =>
-      }
+          requestAnimationFrame(() => {
-      return selector.getAnimations({ subtree: false }).every((animation) => animation.playState === 'finished');
+            const animations = el.getAnimations();
-    },
+            if (animations.length === 0) {
-    undefined,
+              resolve();
-    { timeout: 1000, polling: 50 },
+              return;
+            }
+            void Promise.all(animations.map((a) => a.finished)).then(() => resolve());
+          }),
+        );
+      }),
   );
 };
 
@@ -95,7 +100,7 @@ test.describe('face-editor', () => {
     await page.mouse.down();
     await page.mouse.move(centerX + deltaX, centerY + deltaY, { steps: 5 });
     await page.mouse.up();
-    await page.waitForTimeout(300);
+    await waitForSelectorTransition(page);
   };
 
   test('Face editor opens with person list', async ({ page }) => {
@@ -149,7 +154,7 @@ test.describe('face-editor', () => {
     await expect(page.getByRole('dialog')).toBeVisible();
   });
 
-  test('Confirming tag calls createFace API and closes editor', async ({ page }) => {
+  test('Confirming tag calls createFace API with valid coordinates and closes editor', async ({ page }) => {
     const asset = selectRandom(fixture.assets, rng);
     await openFaceEditor(page, asset);
 
@@ -163,8 +168,15 @@ test.describe('face-editor', () => {
     await expect(page.locator('#face-editor')).toBeHidden();
 
     expect(faceCreateCapture.requests).toHaveLength(1);
-    expect(faceCreateCapture.requests[0].assetId).toBe(asset.id);
+    const request = faceCreateCapture.requests[0];
-    expect(faceCreateCapture.requests[0].personId).toBe(personToTag.id);
+    expect(request.assetId).toBe(asset.id);
+    expect(request.personId).toBe(personToTag.id);
+    expect(request.x).toBeGreaterThanOrEqual(0);
+    expect(request.y).toBeGreaterThanOrEqual(0);
+    expect(request.width).toBeGreaterThan(0);
+    expect(request.height).toBeGreaterThan(0);
+    expect(request.x + request.width).toBeLessThanOrEqual(request.imageWidth);
+    expect(request.y + request.height).toBeLessThanOrEqual(request.imageHeight);
   });
 
   test('Cancel button closes face editor', async ({ page }) => {
@@ -282,4 +294,39 @@ test.describe('face-editor', () => {
     expect(afterDrag.left).toBeGreaterThan(beforeDrag.left + 50);
     expect(afterDrag.top).toBeGreaterThan(beforeDrag.top + 20);
   });
+
+  test('Cancel on confirmation dialog keeps face editor open', async ({ page }) => {
+    const asset = selectRandom(fixture.assets, rng);
+    await openFaceEditor(page, asset);
+
+    const personToTag = mockPeople[0];
+    await page.locator('#face-selector').getByText(personToTag.name).click();
+
+    await expect(page.getByRole('dialog')).toBeVisible();
+    await page
+      .getByRole('dialog')
+      .getByRole('button', { name: /cancel/i })
+      .click();
+
+    await expect(page.getByRole('dialog')).toBeHidden();
+    await expect(page.locator('#face-selector')).toBeVisible();
+    await expect(page.locator('#face-editor')).toBeVisible();
+    expect(faceCreateCapture.requests).toHaveLength(0);
+  });
+
+  test('Clicking on face rect center does not reposition it', async ({ page }) => {
+    const asset = selectRandom(fixture.assets, rng);
+    await openFaceEditor(page, asset);
+
+    const beforeClick = await getFaceBoxRect(page);
+    const centerX = beforeClick.left + beforeClick.width / 2;
+    const centerY = beforeClick.top + beforeClick.height / 2;
+
+    await page.mouse.click(centerX, centerY);
+    await waitForSelectorTransition(page);
+
+    const afterClick = await getFaceBoxRect(page);
+    expect(Math.abs(afterClick.left - beforeClick.left)).toBeLessThan(3);
+    expect(Math.abs(afterClick.top - beforeClick.top)).toBeLessThan(3);
+  });
 });

e2e/src/ui/specs/asset-viewer/face-overlay.e2e-spec.ts

@@ -0,0 +1,340 @@
+import { expect, test } from '@playwright/test';
+import { toAssetResponseDto } from 'src/ui/generators/timeline';
+import {
+  createMockAssetFaces,
+  createMockFaceData,
+  createMockPeople,
+  type MockFaceSpec,
+  setupFaceEditorMockApiRoutes,
+  setupFaceOverlayMockApiRoutes,
+  setupGetFacesMockApiRoute,
+} from 'src/ui/mock-network/face-editor-network';
+import { assetViewerUtils } from '../timeline/utils';
+import { ensureDetailPanelVisible, setupAssetViewerFixture } from './utils';
+
+test.describe.configure({ mode: 'parallel' });
+
+const FACE_SPECS: MockFaceSpec[] = [
+  {
+    personId: 'person-alice',
+    personName: 'Alice Johnson',
+    faceId: 'face-alice',
+    boundingBoxX1: 1000,
+    boundingBoxY1: 500,
+    boundingBoxX2: 1500,
+    boundingBoxY2: 1200,
+  },
+  {
+    personId: 'person-bob',
+    personName: 'Bob Smith',
+    faceId: 'face-bob',
+    boundingBoxX1: 2000,
+    boundingBoxY1: 800,
+    boundingBoxX2: 2400,
+    boundingBoxY2: 1600,
+  },
+];
+
+const setupFaceMocks = async (
+  context: import('@playwright/test').BrowserContext,
+  fixture: ReturnType<typeof setupAssetViewerFixture>,
+) => {
+  const mockPeople = createMockPeople(4);
+  const faceData = createMockFaceData(
+    FACE_SPECS,
+    fixture.primaryAssetDto.width ?? 3000,
+    fixture.primaryAssetDto.height ?? 4000,
+  );
+  const assetDtoWithFaces = toAssetResponseDto(fixture.primaryAsset, undefined, faceData);
+  await setupFaceOverlayMockApiRoutes(context, assetDtoWithFaces);
+  await setupFaceEditorMockApiRoutes(context, mockPeople, { requests: [] });
+};
+
+test.describe('face overlay bounding boxes', () => {
+  const fixture = setupAssetViewerFixture(901);
+
+  test.beforeEach(async ({ context }) => {
+    await setupFaceMocks(context, fixture);
+  });
+
+  test('face overlay divs render with correct aria labels', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const aliceOverlay = page.getByLabel('Person: Alice Johnson');
+    const bobOverlay = page.getByLabel('Person: Bob Smith');
+
+    await expect(aliceOverlay).toBeVisible();
+    await expect(bobOverlay).toBeVisible();
+  });
+
+  test('face overlay shows border on hover', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const aliceOverlay = page.getByLabel('Person: Alice Johnson');
+    await expect(aliceOverlay).toBeVisible();
+
+    const activeBorder = page.locator('[data-viewer-content] .border-solid.border-white.border-3');
+    await expect(activeBorder).toHaveCount(0);
+
+    await aliceOverlay.hover();
+    await expect(activeBorder).toHaveCount(1);
+  });
+
+  test('face name tooltip appears on hover', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const aliceOverlay = page.getByLabel('Person: Alice Johnson');
+    await expect(aliceOverlay).toBeVisible();
+
+    await aliceOverlay.hover();
+
+    const nameTooltip = page.locator('[data-viewer-content]').getByText('Alice Johnson');
+    await expect(nameTooltip).toBeVisible();
+  });
+
+  test('face overlays hidden in face edit mode', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const aliceOverlay = page.getByLabel('Person: Alice Johnson');
+    await expect(aliceOverlay).toBeVisible();
+
+    await ensureDetailPanelVisible(page);
+    await page.getByLabel('Tag people').click();
+    await page.locator('#face-selector').waitFor({ state: 'visible' });
+
+    await expect(aliceOverlay).toBeHidden();
+  });
+
+  test('face overlay hover works after exiting face edit mode', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const aliceOverlay = page.getByLabel('Person: Alice Johnson');
+    await expect(aliceOverlay).toBeVisible();
+
+    await ensureDetailPanelVisible(page);
+    await page.getByLabel('Tag people').click();
+    await page.locator('#face-selector').waitFor({ state: 'visible' });
+    await expect(aliceOverlay).toBeHidden();
+
+    await page.getByRole('button', { name: /cancel/i }).click();
+    await expect(page.locator('#face-selector')).toBeHidden();
+
+    await expect(aliceOverlay).toBeVisible();
+
+    const activeBorder = page.locator('[data-viewer-content] .border-solid.border-white.border-3');
+    await expect(activeBorder).toHaveCount(0);
+    await aliceOverlay.hover();
+    await expect(activeBorder).toHaveCount(1);
+  });
+});
+
+test.describe('zoom and face editor interaction', () => {
+  const fixture = setupAssetViewerFixture(902);
+
+  test.beforeEach(async ({ context }) => {
+    await setupFaceMocks(context, fixture);
+  });
+
+  test('zoom is preserved when entering face edit mode', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const { width, height } = page.viewportSize()!;
+    await page.mouse.move(width / 2, height / 2);
+    await page.mouse.wheel(0, -1);
+
+    const imgLocator = page.locator('[data-viewer-content] img[data-testid="preview"]');
+    await expect(async () => {
+      const transform = await imgLocator.evaluate((element) => {
+        return getComputedStyle(element.closest('[style*="transform"]') ?? element).transform;
+      });
+      expect(transform).not.toBe('none');
+      expect(transform).not.toBe('');
+    }).toPass({ timeout: 2000 });
+
+    await ensureDetailPanelVisible(page);
+    await page.getByLabel('Tag people').click();
+    await page.locator('#face-selector').waitFor({ state: 'visible' });
+
+    await expect(page.locator('#face-editor')).toBeVisible();
+
+    const afterTransform = await imgLocator.evaluate((element) => {
+      return getComputedStyle(element.closest('[style*="transform"]') ?? element).transform;
+    });
+    expect(afterTransform).not.toBe('none');
+  });
+
+  test('modifier+drag pans zoomed image without repositioning face rect', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const { width, height } = page.viewportSize()!;
+    await page.mouse.move(width / 2, height / 2);
+    for (let i = 0; i < 10; i++) {
+      await page.mouse.wheel(0, -3);
+    }
+
+    const imgLocator = page.locator('[data-viewer-content] img[data-testid="preview"]');
+    await expect(async () => {
+      const transform = await imgLocator.evaluate((element) => {
+        return getComputedStyle(element.closest('[style*="transform"]') ?? element).transform;
+      });
+      expect(transform).not.toBe('none');
+    }).toPass({ timeout: 2000 });
+
+    await ensureDetailPanelVisible(page);
+    await page.getByLabel('Tag people').click();
+    await page.locator('#face-selector').waitFor({ state: 'visible' });
+
+    const dataEl = page.locator('#face-editor-data');
+    await expect(dataEl).toHaveAttribute('data-face-width', /^[1-9]/);
+    const beforeLeft = Number(await dataEl.getAttribute('data-face-left'));
+    const beforeTop = Number(await dataEl.getAttribute('data-face-top'));
+    const transformBefore = await imgLocator.evaluate((element) => {
+      return getComputedStyle(element.closest('[style*="transform"]') ?? element).transform;
+    });
+
+    const panModifier = await page.evaluate(() =>
+      /Mac|iPhone|iPad|iPod/.test(navigator.userAgent) ? 'Meta' : 'Control',
+    );
+    await page.keyboard.down(panModifier);
+
+    // Verify face editor becomes transparent to pointer events
+    await expect(async () => {
+      const pe = await dataEl.evaluate((el) => getComputedStyle(el).pointerEvents);
+      expect(pe).toBe('none');
+    }).toPass({ timeout: 2000 });
+
+    await page.mouse.move(width / 2, height / 2);
+    await page.mouse.down();
+    await page.mouse.move(width / 2 + 100, height / 2 + 50, { steps: 5 });
+    await page.mouse.up();
+    await page.keyboard.up(panModifier);
+
+    const transformAfter = await imgLocator.evaluate((element) => {
+      return getComputedStyle(element.closest('[style*="transform"]') ?? element).transform;
+    });
+    expect(transformAfter).not.toBe(transformBefore);
+
+    // Extract translate values from matrix(a, b, c, d, tx, ty)
+    const parseTranslate = (matrix: string) => {
+      const values =
+        matrix
+          .match(/matrix\((.+)\)/)?.[1]
+          .split(',')
+          .map(Number) ?? [];
+      return { tx: values[4], ty: values[5] };
+    };
+    const panBefore = parseTranslate(transformBefore);
+    const panAfter = parseTranslate(transformAfter);
+    const panDeltaX = panAfter.tx - panBefore.tx;
+    const panDeltaY = panAfter.ty - panBefore.ty;
+
+    // Face rect screen position should have moved by the same amount as the pan
+    // (it follows the image), NOT been repositioned by a click
+    const afterLeft = Number(await dataEl.getAttribute('data-face-left'));
+    const afterTop = Number(await dataEl.getAttribute('data-face-top'));
+    const faceDeltaX = afterLeft - beforeLeft;
+    const faceDeltaY = afterTop - beforeTop;
+    expect(Math.abs(faceDeltaX - panDeltaX)).toBeLessThan(3);
+    expect(Math.abs(faceDeltaY - panDeltaY)).toBeLessThan(3);
+  });
+});
+
+test.describe('face overlay via detail panel interaction', () => {
+  const fixture = setupAssetViewerFixture(903);
+
+  test.beforeEach(async ({ context }) => {
+    await setupFaceMocks(context, fixture);
+  });
+
+  test('hovering person in detail panel shows face overlay border', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    await ensureDetailPanelVisible(page);
+
+    const personLink = page.locator('#detail-panel a').filter({ hasText: 'Alice Johnson' });
+    await expect(personLink).toBeVisible();
+
+    const activeBorder = page.locator('[data-viewer-content] .border-solid.border-white.border-3');
+    await expect(activeBorder).toHaveCount(0);
+
+    await personLink.hover();
+    await expect(activeBorder).toHaveCount(1);
+  });
+
+  test('touch pointer on person in detail panel shows face overlay border', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    await ensureDetailPanelVisible(page);
+
+    const personLink = page.locator('#detail-panel a').filter({ hasText: 'Alice Johnson' });
+    await expect(personLink).toBeVisible();
+
+    const activeBorder = page.locator('[data-viewer-content] .border-solid.border-white.border-3');
+    await expect(activeBorder).toHaveCount(0);
+
+    // Simulate a touch-type pointerover (the fix changed from onmouseover to onpointerover,
+    // which fires for touch pointers unlike mouseover)
+    await personLink.dispatchEvent('pointerover', { pointerType: 'touch' });
+    await expect(activeBorder).toHaveCount(1);
+  });
+
+  test('hovering person in detail panel works after exiting face edit mode', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    await ensureDetailPanelVisible(page);
+    await page.getByLabel('Tag people').click();
+    await page.locator('#face-selector').waitFor({ state: 'visible' });
+
+    await page.getByRole('button', { name: /cancel/i }).click();
+    await expect(page.locator('#face-selector')).toBeHidden();
+
+    const personLink = page.locator('#detail-panel a').filter({ hasText: 'Alice Johnson' });
+    await expect(personLink).toBeVisible();
+
+    const activeBorder = page.locator('[data-viewer-content] .border-solid.border-white.border-3');
+    await personLink.hover();
+    await expect(activeBorder).toHaveCount(1);
+  });
+});
+
+test.describe('face overlay via edit faces side panel', () => {
+  const fixture = setupAssetViewerFixture(904);
+
+  test.beforeEach(async ({ context }) => {
+    await setupFaceMocks(context, fixture);
+
+    const assetFaces = createMockAssetFaces(
+      FACE_SPECS,
+      fixture.primaryAssetDto.width ?? 3000,
+      fixture.primaryAssetDto.height ?? 4000,
+    );
+    await setupGetFacesMockApiRoute(context, assetFaces);
+  });
+
+  test('hovering person in edit faces panel shows face overlay border', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    await ensureDetailPanelVisible(page);
+    await page.getByLabel('Edit people').click();
+
+    const faceThumbnail = page.getByTestId('face-thumbnail').first();
+    await expect(faceThumbnail).toBeVisible();
+
+    const activeBorder = page.locator('[data-viewer-content] .border-solid.border-white.border-3');
+    await expect(activeBorder).toHaveCount(0);
+
+    await faceThumbnail.hover();
+    await expect(activeBorder).toHaveCount(1);
+  });
+});

e2e/src/ui/specs/asset-viewer/ocr.e2e-spec.ts

@@ -0,0 +1,300 @@
+import type { AssetOcrResponseDto, AssetResponseDto } from '@immich/sdk';
+import { expect, test } from '@playwright/test';
+import { toAssetResponseDto } from 'src/ui/generators/timeline';
+import {
+  createMockStack,
+  createMockStackAsset,
+  MockStack,
+  setupBrokenAssetMockApiRoutes,
+} from 'src/ui/mock-network/broken-asset-network';
+import { createMockOcrData, setupOcrMockApiRoutes } from 'src/ui/mock-network/ocr-network';
+import { assetViewerUtils } from '../timeline/utils';
+import { setupAssetViewerFixture } from './utils';
+
+test.describe.configure({ mode: 'parallel' });
+
+const PRIMARY_OCR_BOXES = [
+  { text: 'Hello World', x1: 0.1, y1: 0.1, x2: 0.4, y2: 0.1, x3: 0.4, y3: 0.15, x4: 0.1, y4: 0.15 },
+  { text: 'Immich Photo', x1: 0.2, y1: 0.3, x2: 0.6, y2: 0.3, x3: 0.6, y3: 0.36, x4: 0.2, y4: 0.36 },
+];
+
+const SECONDARY_OCR_BOXES = [
+  { text: 'Second Asset Text', x1: 0.15, y1: 0.2, x2: 0.55, y2: 0.2, x3: 0.55, y3: 0.26, x4: 0.15, y4: 0.26 },
+];
+
+test.describe('OCR bounding boxes', () => {
+  const fixture = setupAssetViewerFixture(920);
+
+  test.beforeEach(async ({ context }) => {
+    const primaryAssetDto = toAssetResponseDto(fixture.primaryAsset);
+    const ocrDataByAssetId = new Map<string, AssetOcrResponseDto[]>([
+      [primaryAssetDto.id, createMockOcrData(primaryAssetDto.id, PRIMARY_OCR_BOXES)],
+    ]);
+
+    await setupOcrMockApiRoutes(context, ocrDataByAssetId);
+  });
+
+  test('OCR bounding boxes appear when clicking OCR button', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const ocrButton = page.getByLabel('Text recognition');
+    await expect(ocrButton).toBeVisible();
+    await ocrButton.click();
+
+    const ocrBoxes = page.locator('[data-viewer-content] [data-testid="ocr-box"]');
+    await expect(ocrBoxes).toHaveCount(2);
+
+    await expect(ocrBoxes.nth(0)).toContainText('Hello World');
+    await expect(ocrBoxes.nth(1)).toContainText('Immich Photo');
+  });
+
+  test('OCR bounding boxes toggle off on second click', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const ocrButton = page.getByLabel('Text recognition');
+    await ocrButton.click();
+    await expect(page.locator('[data-viewer-content] [data-testid="ocr-box"]').first()).toBeVisible();
+
+    await ocrButton.click();
+    await expect(page.locator('[data-viewer-content] [data-testid="ocr-box"]')).toHaveCount(0);
+  });
+});
+
+test.describe('OCR with stacked assets', () => {
+  const fixture = setupAssetViewerFixture(921);
+  let mockStack: MockStack;
+  let primaryAssetDto: AssetResponseDto;
+  let secondAssetDto: AssetResponseDto;
+
+  test.beforeAll(async () => {
+    primaryAssetDto = toAssetResponseDto(fixture.primaryAsset);
+    secondAssetDto = createMockStackAsset(fixture.adminUserId);
+    secondAssetDto.originalFileName = 'second-ocr-asset.jpg';
+    mockStack = createMockStack(primaryAssetDto, [secondAssetDto], new Set());
+  });
+
+  test.beforeEach(async ({ context }) => {
+    await setupBrokenAssetMockApiRoutes(context, mockStack);
+
+    const ocrDataByAssetId = new Map<string, AssetOcrResponseDto[]>([
+      [primaryAssetDto.id, createMockOcrData(primaryAssetDto.id, PRIMARY_OCR_BOXES)],
+      [secondAssetDto.id, createMockOcrData(secondAssetDto.id, SECONDARY_OCR_BOXES)],
+    ]);
+
+    await setupOcrMockApiRoutes(context, ocrDataByAssetId);
+  });
+
+  test('different OCR boxes shown for different stacked assets', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const ocrButton = page.getByLabel('Text recognition');
+    await expect(ocrButton).toBeVisible();
+    await ocrButton.click();
+
+    const ocrBoxes = page.locator('[data-viewer-content] [data-testid="ocr-box"]');
+    await expect(ocrBoxes).toHaveCount(2);
+    await expect(ocrBoxes.nth(0)).toContainText('Hello World');
+
+    const stackThumbnails = page.locator('#stack-slideshow [data-asset]');
+    await expect(stackThumbnails).toHaveCount(2);
+    await stackThumbnails.nth(1).click();
+
+    // refreshOcr() clears showOverlay when switching assets, so re-enable it
+    await expect(ocrBoxes).toHaveCount(0);
+    await expect(ocrButton).toBeVisible();
+    await ocrButton.click();
+
+    await expect(ocrBoxes).toHaveCount(1);
+    await expect(ocrBoxes.first()).toContainText('Second Asset Text');
+  });
+});
+
+test.describe('OCR boxes and zoom', () => {
+  const fixture = setupAssetViewerFixture(922);
+
+  test.beforeEach(async ({ context }) => {
+    const primaryAssetDto = toAssetResponseDto(fixture.primaryAsset);
+    const ocrDataByAssetId = new Map<string, AssetOcrResponseDto[]>([
+      [primaryAssetDto.id, createMockOcrData(primaryAssetDto.id, PRIMARY_OCR_BOXES)],
+    ]);
+
+    await setupOcrMockApiRoutes(context, ocrDataByAssetId);
+  });
+
+  test('OCR boxes scale with zoom', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    const ocrButton = page.getByLabel('Text recognition');
+    await expect(ocrButton).toBeVisible();
+    await ocrButton.click();
+
+    const ocrBox = page.locator('[data-viewer-content] [data-testid="ocr-box"]').first();
+    await expect(ocrBox).toBeVisible();
+
+    const initialBox = await ocrBox.boundingBox();
+    expect(initialBox).toBeTruthy();
+
+    const { width, height } = page.viewportSize()!;
+    await page.mouse.move(width / 2, height / 2);
+    await page.mouse.wheel(0, -3);
+
+    await expect(async () => {
+      const zoomedBox = await ocrBox.boundingBox();
+      expect(zoomedBox).toBeTruthy();
+      expect(zoomedBox!.width).toBeGreaterThan(initialBox!.width);
+      expect(zoomedBox!.height).toBeGreaterThan(initialBox!.height);
+    }).toPass({ timeout: 2000 });
+  });
+});
+
+test.describe('OCR text interaction', () => {
+  const fixture = setupAssetViewerFixture(923);
+
+  test.beforeEach(async ({ context }) => {
+    const primaryAssetDto = toAssetResponseDto(fixture.primaryAsset);
+    const ocrDataByAssetId = new Map<string, AssetOcrResponseDto[]>([
+      [primaryAssetDto.id, createMockOcrData(primaryAssetDto.id, PRIMARY_OCR_BOXES)],
+    ]);
+
+    await setupOcrMockApiRoutes(context, ocrDataByAssetId);
+  });
+
+  test('OCR text box has data-overlay-interactive attribute', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    await page.getByLabel('Text recognition').click();
+
+    const ocrBox = page.locator('[data-viewer-content] [data-testid="ocr-box"]').first();
+    await expect(ocrBox).toBeVisible();
+    await expect(ocrBox).toHaveAttribute('data-overlay-interactive');
+  });
+
+  test('OCR text box receives focus on click', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    await page.getByLabel('Text recognition').click();
+
+    const ocrBox = page.locator('[data-viewer-content] [data-testid="ocr-box"]').first();
+    await expect(ocrBox).toBeVisible();
+
+    await ocrBox.click();
+    await expect(ocrBox).toBeFocused();
+  });
+
+  test('dragging on OCR text box does not trigger image pan', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    await page.getByLabel('Text recognition').click();
+
+    const ocrBox = page.locator('[data-viewer-content] [data-testid="ocr-box"]').first();
+    await expect(ocrBox).toBeVisible();
+
+    const imgLocator = page.locator('[data-viewer-content] img[draggable="false"]');
+    const initialTransform = await imgLocator.evaluate((element) => {
+      return getComputedStyle(element.closest('[style*="transform"]') ?? element).transform;
+    });
+
+    const box = await ocrBox.boundingBox();
+    expect(box).toBeTruthy();
+    const centerX = box!.x + box!.width / 2;
+    const centerY = box!.y + box!.height / 2;
+
+    await page.mouse.move(centerX, centerY);
+    await page.mouse.down();
+    await page.mouse.move(centerX + 50, centerY + 30, { steps: 5 });
+    await page.mouse.up();
+
+    const afterTransform = await imgLocator.evaluate((element) => {
+      return getComputedStyle(element.closest('[style*="transform"]') ?? element).transform;
+    });
+    expect(afterTransform).toBe(initialTransform);
+  });
+
+  test('split touch gesture across zoom container does not trigger zoom', async ({ page }) => {
+    await page.goto(`/photos/${fixture.primaryAsset.id}`);
+    await assetViewerUtils.waitForViewerLoad(page, fixture.primaryAsset);
+
+    await page.getByLabel('Text recognition').click();
+    const ocrBox = page.locator('[data-viewer-content] [data-testid="ocr-box"]').first();
+    await expect(ocrBox).toBeVisible();
+
+    const imgLocator = page.locator('[data-viewer-content] img[draggable="false"]');
+    const initialTransform = await imgLocator.evaluate((element) => {
+      return getComputedStyle(element.closest('[style*="transform"]') ?? element).transform;
+    });
+
+    const viewerContent = page.locator('[data-viewer-content]');
+    const viewerBox = await viewerContent.boundingBox();
+    expect(viewerBox).toBeTruthy();
+
+    // Dispatch a synthetic split gesture: one touch inside the viewer, one outside
+    await page.evaluate(
+      ({ viewerCenterX, viewerCenterY, outsideY }) => {
+        const viewer = document.querySelector('[data-viewer-content]');
+        if (!viewer) {
+          return;
+        }
+
+        const createTouch = (id: number, x: number, y: number) => {
+          return new Touch({
+            identifier: id,
+            target: viewer,
+            clientX: x,
+            clientY: y,
+          });
+        };
+
+        const insideTouch = createTouch(0, viewerCenterX, viewerCenterY);
+        const outsideTouch = createTouch(1, viewerCenterX, outsideY);
+
+        const touchStartEvent = new TouchEvent('touchstart', {
+          touches: [insideTouch, outsideTouch],
+          targetTouches: [insideTouch],
+          changedTouches: [insideTouch, outsideTouch],
+          bubbles: true,
+          cancelable: true,
+        });
+
+        const touchMoveEvent = new TouchEvent('touchmove', {
+          touches: [createTouch(0, viewerCenterX, viewerCenterY - 30), createTouch(1, viewerCenterX, outsideY + 30)],
+          targetTouches: [createTouch(0, viewerCenterX, viewerCenterY - 30)],
+          changedTouches: [
+            createTouch(0, viewerCenterX, viewerCenterY - 30),
+            createTouch(1, viewerCenterX, outsideY + 30),
+          ],
+          bubbles: true,
+          cancelable: true,
+        });
+
+        const touchEndEvent = new TouchEvent('touchend', {
+          touches: [],
+          targetTouches: [],
+          changedTouches: [insideTouch, outsideTouch],
+          bubbles: true,
+          cancelable: true,
+        });
+
+        viewer.dispatchEvent(touchStartEvent);
+        viewer.dispatchEvent(touchMoveEvent);
+        viewer.dispatchEvent(touchEndEvent);
+      },
+      {
+        viewerCenterX: viewerBox!.x + viewerBox!.width / 2,
+        viewerCenterY: viewerBox!.y + viewerBox!.height / 2,
+        outsideY: 10, // near the top of the page, outside the viewer
+      },
+    );
+
+    const afterTransform = await imgLocator.evaluate((element) => {
+      return getComputedStyle(element.closest('[style*="transform"]') ?? element).transform;
+    });
+    expect(afterTransform).toBe(initialTransform);
+  });
+});

e2e/src/ui/specs/search/search-gallery.e2e-spec.ts

@@ -6,6 +6,7 @@ import {
   generateTimelineData,
   TimelineAssetConfig,
   TimelineData,
+  toAssetResponseDto,
 } from 'src/ui/generators/timeline';
 import { setupBaseMockApiRoutes } from 'src/ui/mock-network/base-network';
 import { setupTimelineMockApiRoutes, TimelineTestContext } from 'src/ui/mock-network/timeline-network';
@@ -30,6 +31,10 @@ test.describe('search gallery-viewer', () => {
   };
 
   test.beforeAll(async () => {
+    test.fail(
+      process.env.PW_EXPERIMENTAL_SERVICE_WORKER_NETWORK_EVENTS !== '1',
+      'This test requires env var: PW_EXPERIMENTAL_SERVICE_WORKER_NETWORK_EVENTS=1',
+    );
     adminUserId = faker.string.uuid();
     testContext.adminId = adminUserId;
     timelineRestData = generateTimelineData({ ...createDefaultTimelineConfig(), ownerId: adminUserId });
@@ -44,7 +49,10 @@ test.describe('search gallery-viewer', () => {
 
     await context.route('**/api/search/metadata', async (route, request) => {
       if (request.method() === 'POST') {
-        const searchAssets = assets.slice(0, 5).filter((asset) => !changes.assetDeletions.includes(asset.id));
+        const searchAssets = assets
+          .slice(0, 5)
+          .filter((asset) => !changes.assetDeletions.includes(asset.id))
+          .map((asset) => toAssetResponseDto(asset));
         return route.fulfill({
           status: 200,
           contentType: 'application/json',

e2e/src/ui/specs/timeline/utils.ts

@@ -143,7 +143,7 @@ export const timelineUtils = {
     return page.locator('#asset-grid');
   },
   async waitForTimelineLoad(page: Page) {
-    await expect(timelineUtils.locator(page)).toBeInViewport();
+    await page.locator('#asset-grid[data-initialized]').waitFor();
     await expect.poll(() => thumbnailUtils.locator(page).count()).toBeGreaterThan(0);
   },
   async getScrollTop(page: Page) {
@@ -163,14 +163,17 @@ export const assetViewerUtils = {
     return page.locator('#immich-asset-viewer');
   },
   async waitForViewerLoad(page: Page, asset: TimelineAssetConfig) {
-    await page
+    const imgLocator = page.locator(`[data-viewer-content] img[data-testid="preview"][src*="${asset.id}"]`);
-      .locator(
+    const videoLocator = page.locator(`[data-viewer-content] video[poster*="${asset.id}"]`);
-        `img[draggable="false"][src="/api/assets/${asset.id}/thumbnail?size=preview&c=${asset.thumbhash}&edited=true"]`,
+    await imgLocator.or(videoLocator).waitFor();
-      )
+
-      .or(
+    if ((await videoLocator.count()) === 0) {
-        page.locator(`video[poster="/api/assets/${asset.id}/thumbnail?size=preview&c=${asset.thumbhash}&edited=true"]`),
+      await expect
-      )
+        .poll(() => imgLocator.evaluate((img: HTMLImageElement) => img.complete && img.naturalWidth > 0))
-      .waitFor();
+        .toBe(true);
+    }
+
+    await expect(page.locator('#immich-asset-viewer')).not.toHaveAttribute('data-navigating');
   },
   async expectActiveAssetToBe(page: Page, assetId: string) {
     const activeElement = () =>

e2e/src/web/specs/asset-viewer/asset-viewer.ui-spec.ts

@@ -0,0 +1,273 @@
+import { faker } from '@faker-js/faker';
+import { expect, test } from '@playwright/test';
+import {
+  Changes,
+  createDefaultTimelineConfig,
+  generateTimelineData,
+  SeededRandom,
+  selectRandom,
+  TimelineAssetConfig,
+  TimelineData,
+} from 'src/ui/generators/timeline';
+import { setupBaseMockApiRoutes } from 'src/ui/mock-network/base-network';
+import { setupTimelineMockApiRoutes, TimelineTestContext } from 'src/ui/mock-network/timeline-network';
+import { assetViewerUtils } from 'src/ui/specs/timeline/utils';
+import { utils } from 'src/utils';
+
+test.describe.configure({ mode: 'parallel' });
+test.describe('asset-viewer', () => {
+  const rng = new SeededRandom(529);
+  let adminUserId: string;
+  let timelineRestData: TimelineData;
+  const assets: TimelineAssetConfig[] = [];
+  const yearMonths: string[] = [];
+  const testContext = new TimelineTestContext();
+  const changes: Changes = {
+    albumAdditions: [],
+    assetDeletions: [],
+    assetArchivals: [],
+    assetFavorites: [],
+  };
+
+  test.beforeAll(async () => {
+    utils.initSdk();
+    adminUserId = faker.string.uuid();
+    testContext.adminId = adminUserId;
+    timelineRestData = generateTimelineData({ ...createDefaultTimelineConfig(), ownerId: adminUserId });
+    for (const timeBucket of timelineRestData.buckets.values()) {
+      assets.push(...timeBucket);
+    }
+    for (const yearMonth of timelineRestData.buckets.keys()) {
+      const [year, month] = yearMonth.split('-');
+      yearMonths.push(`${year}-${Number(month)}`);
+    }
+  });
+
+  test.beforeEach(async ({ context }) => {
+    await setupBaseMockApiRoutes(context, adminUserId);
+    await setupTimelineMockApiRoutes(context, timelineRestData, changes, testContext);
+  });
+
+  test.afterEach(() => {
+    testContext.slowBucket = false;
+    changes.albumAdditions = [];
+    changes.assetDeletions = [];
+    changes.assetArchivals = [];
+    changes.assetFavorites = [];
+  });
+
+  test.describe('/photos/:id', () => {
+    test('Navigate to next asset via button', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+      await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${asset.id}`);
+
+      await page.getByLabel('View next asset').click();
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 1]);
+      await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${assets[index + 1].id}`);
+    });
+
+    test('Navigate to previous asset via button', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+      await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${asset.id}`);
+
+      await page.getByLabel('View previous asset').click();
+      await assetViewerUtils.waitForViewerLoad(page, assets[index - 1]);
+      await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${assets[index - 1].id}`);
+    });
+
+    test('Navigate to next asset via keyboard (ArrowRight)', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+      await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${asset.id}`);
+
+      await page.getByTestId('next-asset').waitFor();
+      await page.keyboard.press('ArrowRight');
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 1]);
+      await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${assets[index + 1].id}`);
+    });
+
+    test('Navigate to previous asset via keyboard (ArrowLeft)', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+      await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${asset.id}`);
+
+      await page.getByTestId('previous-asset').waitFor();
+      await page.keyboard.press('ArrowLeft');
+      await assetViewerUtils.waitForViewerLoad(page, assets[index - 1]);
+      await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${assets[index - 1].id}`);
+    });
+
+    test('Navigate forward 5 times via button', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+
+      for (let i = 1; i <= 5; i++) {
+        await page.getByLabel('View next asset').click();
+        await assetViewerUtils.waitForViewerLoad(page, assets[index + i]);
+        await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${assets[index + i].id}`);
+      }
+    });
+
+    test('Navigate backward 5 times via button', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+
+      for (let i = 1; i <= 5; i++) {
+        await page.getByLabel('View previous asset').click();
+        await assetViewerUtils.waitForViewerLoad(page, assets[index - i]);
+        await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${assets[index - i].id}`);
+      }
+    });
+
+    test('Navigate forward then backward via keyboard', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+
+      // Navigate forward 3 times
+      for (let i = 1; i <= 3; i++) {
+        await page.getByTestId('next-asset').waitFor();
+        await page.keyboard.press('ArrowRight');
+        await assetViewerUtils.waitForViewerLoad(page, assets[index + i]);
+      }
+
+      // Navigate backward 3 times to return to original
+      for (let i = 2; i >= 0; i--) {
+        await page.getByTestId('previous-asset').waitFor();
+        await page.keyboard.press('ArrowLeft');
+        await assetViewerUtils.waitForViewerLoad(page, assets[index + i]);
+      }
+
+      // Verify we're back at the original asset
+      await expect.poll(() => new URL(page.url()).pathname).toBe(`/photos/${asset.id}`);
+    });
+
+    test('Verify no next button on last asset', async ({ page }) => {
+      const lastAsset = assets.at(-1)!;
+      await page.goto(`/photos/${lastAsset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, lastAsset);
+
+      // Verify next button doesn't exist
+      await expect(page.getByLabel('View next asset')).toHaveCount(0);
+    });
+
+    test('Verify no previous button on first asset', async ({ page }) => {
+      const firstAsset = assets[0];
+      await page.goto(`/photos/${firstAsset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, firstAsset);
+
+      // Verify previous button doesn't exist
+      await expect(page.getByLabel('View previous asset')).toHaveCount(0);
+    });
+
+    test('Delete photo advances to next', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+      await page.getByLabel('Delete').click();
+      const index = assets.indexOf(asset);
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 1]);
+    });
+    test('Delete photo advances to next (2x)', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+      await page.getByLabel('Delete').click();
+      const index = assets.indexOf(asset);
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 1]);
+      await page.getByLabel('Delete').click();
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 2]);
+    });
+    test('Delete last photo advances to prev', async ({ page }) => {
+      const asset = assets.at(-1)!;
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+      await page.getByLabel('Delete').click();
+      const index = assets.indexOf(asset);
+      await assetViewerUtils.waitForViewerLoad(page, assets[index - 1]);
+    });
+    test('Delete last photo advances to prev (2x)', async ({ page }) => {
+      const asset = assets.at(-1)!;
+      await page.goto(`/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+      await page.getByLabel('Delete').click();
+      const index = assets.indexOf(asset);
+      await assetViewerUtils.waitForViewerLoad(page, assets[index - 1]);
+      await page.getByLabel('Delete').click();
+      await assetViewerUtils.waitForViewerLoad(page, assets[index - 2]);
+    });
+  });
+  test.describe('/trash/photos/:id', () => {
+    test('Delete trashed photo advances to next', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      const deletedAssets = assets.slice(index - 10, index + 10).map((asset) => asset.id);
+      changes.assetDeletions.push(...deletedAssets);
+      await page.goto(`/trash/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+      await page.getByLabel('Delete').click();
+      // confirm dialog
+      await page.getByRole('button').getByText('Delete').click();
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 1]);
+    });
+    test('Delete trashed photo advances to next 2x', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      const deletedAssets = assets.slice(index - 10, index + 10).map((asset) => asset.id);
+      changes.assetDeletions.push(...deletedAssets);
+      await page.goto(`/trash/photos/${asset.id}`);
+      await assetViewerUtils.waitForViewerLoad(page, asset);
+      await page.getByLabel('Delete').click();
+      // confirm dialog
+      await page.getByRole('button').getByText('Delete').click();
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 1]);
+      await page.getByLabel('Delete').click();
+      // confirm dialog
+      await page.getByRole('button').getByText('Delete').click();
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 2]);
+    });
+    test('Delete trashed photo advances to prev', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      const deletedAssets = assets.slice(index - 10, index + 10).map((asset) => asset.id);
+      changes.assetDeletions.push(...deletedAssets);
+      await page.goto(`/trash/photos/${assets[index + 9].id}`);
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 9]);
+      await page.getByLabel('Delete').click();
+      // confirm dialog
+      await page.getByRole('button').getByText('Delete').click();
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 8]);
+    });
+    test('Delete trashed photo advances to prev 2x', async ({ page }) => {
+      const asset = selectRandom(assets, rng);
+      const index = assets.indexOf(asset);
+      const deletedAssets = assets.slice(index - 10, index + 10).map((asset) => asset.id);
+      changes.assetDeletions.push(...deletedAssets);
+      await page.goto(`/trash/photos/${assets[index + 9].id}`);
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 9]);
+      await page.getByLabel('Delete').click();
+      // confirm dialog
+      await page.getByRole('button').getByText('Delete').click();
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 8]);
+      await page.getByLabel('Delete').click();
+      // confirm dialog
+      await page.getByRole('button').getByText('Delete').click();
+      await assetViewerUtils.waitForViewerLoad(page, assets[index + 7]);
+    });
+  });
+});

i18n/en.json

@@ -1275,6 +1275,7 @@
   "hide_schema": "Hide schema",
   "hide_text_recognition": "Hide text recognition",
   "hide_unnamed_people": "Hide unnamed people",
+  "hold_key_to_pan": "Hold {key} to pan",
   "home_page_add_to_album_conflicts": "Added {added} assets to album {album}. {failed} assets are already in the album.",
   "home_page_add_to_album_err_local": "Can not add local assets to albums yet, skipping",
   "home_page_add_to_album_success": "Added {added} assets to album {album}.",

test-results/.last-run.json

@@ -0,0 +1,4 @@
+{
+  "status": "failed",
+  "failedTests": []
+}

web/src/app.css

@@ -75,6 +75,35 @@
     --immich-dark-bg: 10 10 10;
     --immich-dark-fg: 229 231 235;
     --immich-dark-gray: 33 33 33;
+
+    /* transitions */
+    --immich-split-viewer-nav: enabled;
+
+    /* view transition variables */
+    /* Base animation duration for standard transitions (page fades, info panel) */
+    --vt-duration-default: 250ms;
+    /* Duration for hero transitions (thumbnail to full viewer) */
+    --vt-duration-hero: 280ms;
+    /* Duration for next/previous photo navigation */
+    --vt-duration-viewer-navigation: 270ms;
+    /* Duration for slideshow mode transitions */
+    --vt-duration-slideshow: 1s;
+    /* Easing function for slide animations (ease-out) */
+    --vt-viewer-slide-easing: cubic-bezier(0.2, 0, 0, 1);
+    /* How far images slide in/out during navigation (% of viewport) */
+    --vt-viewer-slide-distance: 15%;
+    /* Starting opacity for fly transitions (slide+fade effect) */
+    --vt-viewer-opacity-start: 0.1;
+    /* Maximum blur during fly transitions (currently disabled) */
+    --vt-viewer-blur-max: 0px;
+
+    --vt-viewer-next-in: flyInRight;
+    --vt-viewer-next-out: flyOutLeft;
+    --vt-viewer-prev-in: flyInLeft;
+    --vt-viewer-prev-out: flyOutRight;
+    --vt-viewer-old-opacity: 1;
+    /* Easing function for memory and hero morph transitions */
+    --vt-memory-easing: cubic-bezier(0.2, 0, 0, 1);
   }
 
   button:not(:disabled),
@@ -176,3 +205,370 @@
     @apply bg-subtle rounded-lg;
   }
 }
+
+@layer base {
+  ::view-transition {
+    background: var(--color-black);
+    animation-duration: var(--vt-duration-default);
+  }
+
+  ::view-transition-old(*),
+  ::view-transition-new(*) {
+    mix-blend-mode: normal;
+    animation-duration: inherit;
+  }
+
+  ::view-transition-old(*) {
+    animation-name: fadeOut;
+    animation-fill-mode: forwards;
+  }
+  ::view-transition-new(*) {
+    animation-name: fadeIn;
+    animation-fill-mode: forwards;
+  }
+
+  ::view-transition-old(root) {
+    animation: var(--vt-duration-default) 0s fadeOut forwards;
+  }
+  ::view-transition-new(root) {
+    animation: var(--vt-duration-default) 0s fadeIn forwards;
+  }
+  html:active-view-transition-type(slideshow) {
+    &::view-transition-old(*) {
+      animation: var(--vt-duration-slideshow) linear crossfadeOut forwards;
+    }
+    &::view-transition-new(*) {
+      animation: var(--vt-duration-slideshow) linear crossfadeIn forwards;
+    }
+    &::view-transition-image-pair(*) {
+      isolation: auto;
+    }
+  }
+  html:active-view-transition-type(viewer-nav) {
+    &::view-transition-old(root) {
+      animation: var(--vt-duration-hero) 0s fadeOut forwards;
+    }
+    &::view-transition-new(root) {
+      animation: var(--vt-duration-hero) 0s fadeIn forwards;
+    }
+  }
+  ::view-transition-image-pair(info) {
+    isolation: auto;
+  }
+  ::view-transition-old(info) {
+    animation: var(--vt-duration-default) 0s panelSlideOutRight forwards;
+  }
+  ::view-transition-new(info) {
+    animation: var(--vt-duration-default) 0s panelSlideInRight forwards;
+  }
+
+  ::view-transition-group(detail-panel) {
+    z-index: 1;
+  }
+  ::view-transition-old(detail-panel),
+  ::view-transition-new(detail-panel) {
+    animation: none;
+  }
+  ::view-transition-group(letterbox-left),
+  ::view-transition-group(letterbox-right),
+  ::view-transition-group(letterbox-top),
+  ::view-transition-group(letterbox-bottom) {
+    animation-duration: var(--vt-duration-viewer-navigation);
+    animation-timing-function: var(--vt-viewer-slide-easing);
+    z-index: 4;
+  }
+
+  ::view-transition-image-pair(letterbox-left),
+  ::view-transition-image-pair(letterbox-right),
+  ::view-transition-image-pair(letterbox-top),
+  ::view-transition-image-pair(letterbox-bottom) {
+    isolation: auto;
+  }
+
+  ::view-transition-old(letterbox-left),
+  ::view-transition-old(letterbox-right),
+  ::view-transition-old(letterbox-top),
+  ::view-transition-old(letterbox-bottom),
+  ::view-transition-new(letterbox-left),
+  ::view-transition-new(letterbox-right),
+  ::view-transition-new(letterbox-top),
+  ::view-transition-new(letterbox-bottom) {
+    animation: none;
+    width: 100%;
+    height: 100%;
+    object-fit: fill;
+    background-color: var(--color-black);
+  }
+
+  ::view-transition-group(exclude-leftbutton),
+  ::view-transition-group(exclude-rightbutton),
+  ::view-transition-group(exclude) {
+    animation: none;
+    z-index: 5;
+  }
+  ::view-transition-old(exclude-leftbutton),
+  ::view-transition-old(exclude-rightbutton),
+  ::view-transition-old(exclude) {
+    visibility: hidden;
+  }
+  ::view-transition-new(exclude-leftbutton),
+  ::view-transition-new(exclude-rightbutton),
+  ::view-transition-new(exclude) {
+    animation: none;
+    z-index: 5;
+  }
+
+  ::view-transition-group(hero) {
+    animation-duration: var(--vt-duration-hero);
+    animation-timing-function: var(--vt-memory-easing);
+  }
+  ::view-transition-old(hero) {
+    animation: none;
+    display: none;
+  }
+  ::view-transition-new(hero) {
+    animation: none;
+    align-content: center;
+  }
+  ::view-transition-old(next),
+  ::view-transition-old(next-old),
+  ::view-transition-new(next),
+  ::view-transition-new(next-new),
+  ::view-transition-old(previous),
+  ::view-transition-old(previous-old),
+  ::view-transition-new(previous),
+  ::view-transition-new(previous-new) {
+    animation-duration: var(--vt-duration-viewer-navigation);
+    animation-timing-function: var(--vt-viewer-slide-easing);
+    animation-fill-mode: forwards;
+  }
+
+  ::view-transition-old(next),
+  ::view-transition-old(next-old),
+  ::view-transition-old(previous),
+  ::view-transition-old(previous-old) {
+    opacity: var(--vt-viewer-old-opacity);
+  }
+
+  ::view-transition-old(next),
+  ::view-transition-old(next-old) {
+    animation-name: var(--vt-viewer-next-out);
+  }
+
+  ::view-transition-new(next),
+  ::view-transition-new(next-new) {
+    animation-name: var(--vt-viewer-next-in);
+  }
+
+  ::view-transition-old(previous),
+  ::view-transition-old(previous-old) {
+    animation-name: var(--vt-viewer-prev-out);
+  }
+
+  ::view-transition-new(previous),
+  ::view-transition-new(previous-new) {
+    animation-name: var(--vt-viewer-prev-in);
+  }
+
+  ::view-transition-old(next-old),
+  ::view-transition-new(next-new),
+  ::view-transition-old(previous-old),
+  ::view-transition-new(previous-new) {
+    overflow: hidden;
+  }
+
+  ::view-transition-old(previous-old) {
+    z-index: -1;
+  }
+
+  @keyframes flyInLeft {
+    from {
+      transform: translateX(calc(-1 * var(--vt-viewer-slide-distance)));
+      opacity: var(--vt-viewer-opacity-start);
+      filter: blur(var(--vt-viewer-blur-max));
+    }
+    to {
+      opacity: 1;
+      filter: blur(0);
+    }
+  }
+
+  @keyframes flyOutLeft {
+    from {
+      opacity: 1;
+      filter: blur(0);
+    }
+    to {
+      transform: translateX(calc(-1 * var(--vt-viewer-slide-distance)));
+      opacity: var(--vt-viewer-opacity-start);
+      filter: blur(var(--vt-viewer-blur-max));
+    }
+  }
+
+  @keyframes flyInRight {
+    from {
+      transform: translateX(var(--vt-viewer-slide-distance));
+      opacity: var(--vt-viewer-opacity-start);
+      filter: blur(var(--vt-viewer-blur-max));
+    }
+    to {
+      opacity: 1;
+      filter: blur(0);
+    }
+  }
+
+  @keyframes flyOutRight {
+    from {
+      opacity: 1;
+      filter: blur(0);
+    }
+    to {
+      transform: translateX(var(--vt-viewer-slide-distance));
+      opacity: var(--vt-viewer-opacity-start);
+      filter: blur(var(--vt-viewer-blur-max));
+    }
+  }
+
+  @keyframes panelSlideInRight {
+    from {
+      transform: translateX(100%);
+    }
+    to {
+      transform: translateX(0);
+    }
+  }
+
+  @keyframes panelSlideOutRight {
+    from {
+      transform: translateX(0);
+    }
+    to {
+      transform: translateX(100%);
+    }
+  }
+
+  /* cubic fade curves so combined opacity stays close to 1.0 during crossfade */
+  @keyframes fadeIn {
+    from {
+      opacity: 0;
+    }
+    50% {
+      opacity: 0.85;
+    }
+    to {
+      opacity: 1;
+    }
+  }
+  @keyframes fadeOut {
+    from {
+      opacity: 1;
+    }
+    50% {
+      opacity: 0.85;
+    }
+    to {
+      opacity: 0;
+    }
+  }
+
+  @keyframes crossfadeIn {
+    from {
+      opacity: 0;
+    }
+    to {
+      opacity: 1;
+    }
+  }
+  @keyframes crossfadeOut {
+    from {
+      opacity: 1;
+    }
+    to {
+      opacity: 0;
+    }
+  }
+
+  @media (prefers-reduced-motion: reduce) {
+    ::view-transition-group(hero) {
+      animation-name: none;
+    }
+
+    ::view-transition-old(hero) {
+      animation: none;
+      display: none;
+    }
+
+    ::view-transition-new(hero) {
+      animation: none;
+    }
+
+    html:active-view-transition-type(viewer) {
+      &::view-transition-old(hero) {
+        animation: none;
+        display: none;
+      }
+      &::view-transition-new(hero) {
+        animation: var(--vt-duration-default) 0s fadeIn forwards;
+      }
+    }
+
+    html:active-view-transition-type(timeline) {
+      &::view-transition-old(hero) {
+        animation: var(--vt-duration-default) 0s fadeOut forwards;
+      }
+      &::view-transition-new(hero) {
+        animation: var(--vt-duration-default) 0s fadeIn forwards;
+      }
+    }
+
+    ::view-transition-group(letterbox-left),
+    ::view-transition-group(letterbox-right),
+    ::view-transition-group(letterbox-top),
+    ::view-transition-group(letterbox-bottom) {
+      z-index: 100;
+    }
+
+    ::view-transition-old(letterbox-left),
+    ::view-transition-old(letterbox-right),
+    ::view-transition-old(letterbox-top),
+    ::view-transition-old(letterbox-bottom),
+    ::view-transition-new(letterbox-left),
+    ::view-transition-new(letterbox-right),
+    ::view-transition-new(letterbox-top),
+    ::view-transition-new(letterbox-bottom) {
+      background-color: transparent;
+    }
+
+    ::view-transition-group(previous),
+    ::view-transition-group(previous-old),
+    ::view-transition-group(next),
+    ::view-transition-group(next-old) {
+      width: 100% !important;
+      height: 100% !important;
+      transform: none !important;
+    }
+
+    ::view-transition-old(previous),
+    ::view-transition-old(previous-old),
+    ::view-transition-old(next),
+    ::view-transition-old(next-old) {
+      animation: var(--vt-duration-viewer-navigation) fadeOut forwards;
+      transform-origin: center;
+      height: 100%;
+      width: 100%;
+      object-fit: contain;
+      overflow: hidden;
+    }
+
+    ::view-transition-new(previous),
+    ::view-transition-new(previous-new),
+    ::view-transition-new(next),
+    ::view-transition-new(next-new) {
+      animation: var(--vt-duration-viewer-navigation) fadeIn forwards;
+      transform-origin: center;
+      height: 100%;
+      width: 100%;
+      object-fit: contain;
+    }
+  }
+}

web/src/lib/actions/zoom-image.ts

@@ -1,11 +1,18 @@
 import { assetViewerManager } from '$lib/managers/asset-viewer-manager.svelte';
 import { createZoomImageWheel } from '@zoom-image/core';
 
-export const zoomImageAction = (node: HTMLElement, options?: { disabled?: boolean }) => {
+// Minimal touch shape — avoids importing DOM TouchEvent which isn't available in all TS targets.
+type TouchEventLike = {
+  touches: Iterable<{ clientX: number; clientY: number }> & { length: number };
+  targetTouches: ArrayLike<unknown>;
+};
+const asTouchEvent = (event: Event) => event as unknown as TouchEventLike;
+
+export const zoomImageAction = (node: HTMLElement, options?: { zoomTarget?: HTMLElement }) => {
   const zoomInstance = createZoomImageWheel(node, {
     maxZoom: 10,
     initialState: assetViewerManager.zoomState,
-    zoomTarget: null,
+    zoomTarget: options?.zoomTarget,
   });
 
   const unsubscribes = [
@@ -13,47 +20,130 @@ export const zoomImageAction = (node: HTMLElement, options?: { disabled?: boolea
     zoomInstance.subscribe(({ state }) => assetViewerManager.onZoomChange(state)),
   ];
 
-  const onInteractionStart = (event: Event) => {
+  const controller = new AbortController();
-    if (options?.disabled) {
+  const { signal } = controller;
-      event.stopImmediatePropagation();
+
+  node.addEventListener('pointerdown', () => assetViewerManager.cancelZoomAnimation(), { capture: true, signal });
+
+  // Intercept events in capture phase to prevent zoom-image from seeing interactions on
+  // overlay elements (e.g. OCR text boxes), preserving browser defaults like text selection.
+  const isOverlayEvent = (event: Event) => !!(event.target as HTMLElement).closest('[data-overlay-interactive]');
+  const isOverlayAtPoint = (x: number, y: number) =>
+    !!document.elementFromPoint(x, y)?.closest('[data-overlay-interactive]');
+
+  // Pointer event interception: track pointers that start on overlays and intercept the entire gesture.
+  const overlayPointers = new Set<number>();
+  const interceptedPointers = new Set<number>();
+  const interceptOverlayPointerDown = (event: PointerEvent) => {
+    if (isOverlayEvent(event) || isOverlayAtPoint(event.clientX, event.clientY)) {
+      overlayPointers.add(event.pointerId);
+      interceptedPointers.add(event.pointerId);
+      event.stopPropagation();
+    } else if (overlayPointers.size > 0) {
+      // Split gesture (e.g. pinch with one finger on overlay) — intercept entirely.
+      interceptedPointers.add(event.pointerId);
+      event.stopPropagation();
     }
-    assetViewerManager.cancelZoomAnimation();
   };
+  const interceptOverlayPointerEvent = (event: PointerEvent) => {
+    if (interceptedPointers.has(event.pointerId)) {
+      event.stopPropagation();
+    }
+  };
+  const interceptOverlayPointerEnd = (event: PointerEvent) => {
+    overlayPointers.delete(event.pointerId);
+    if (interceptedPointers.delete(event.pointerId)) {
+      event.stopPropagation();
+    }
+  };
+  node.addEventListener('pointerdown', interceptOverlayPointerDown, { capture: true, signal });
+  node.addEventListener('pointermove', interceptOverlayPointerEvent, { capture: true, signal });
+  node.addEventListener('pointerup', interceptOverlayPointerEnd, { capture: true, signal });
+  node.addEventListener('pointerleave', interceptOverlayPointerEnd, { capture: true, signal });
 
-  node.addEventListener('wheel', onInteractionStart, { capture: true });
+  // Touch event interception for overlay touches or split gestures (pinch across container boundary).
-  node.addEventListener('pointerdown', onInteractionStart, { capture: true });
+  // Once intercepted, stays intercepted until all fingers are lifted.
+  let touchGestureIntercepted = false;
+  const interceptOverlayTouchEvent = (event: Event) => {
+    if (touchGestureIntercepted) {
+      event.stopPropagation();
+      return;
+    }
+    const { touches, targetTouches } = asTouchEvent(event);
+    if (touches && targetTouches) {
+      if (touches.length > targetTouches.length) {
+        touchGestureIntercepted = true;
+        event.stopPropagation();
+        return;
+      }
+      for (const touch of touches) {
+        if (isOverlayAtPoint(touch.clientX, touch.clientY)) {
+          touchGestureIntercepted = true;
+          event.stopPropagation();
+          return;
+        }
+      }
+    } else if (isOverlayEvent(event)) {
+      event.stopPropagation();
+    }
+  };
+  const resetTouchGesture = (event: Event) => {
+    const { touches } = asTouchEvent(event);
+    if (touches.length === 0) {
+      touchGestureIntercepted = false;
+    }
+  };
+  node.addEventListener('touchstart', interceptOverlayTouchEvent, { capture: true, signal });
+  node.addEventListener('touchmove', interceptOverlayTouchEvent, { capture: true, signal });
+  node.addEventListener('touchend', resetTouchGesture, { capture: true, signal });
 
-  // Suppress Safari's synthetic dblclick on double-tap. Without this, zoom-image's touchstart
+  // Wheel and dblclick interception on overlay elements.
-  // handler zooms to maxZoom (10x), then Safari's synthetic dblclick triggers photo-viewer's
+  // Dblclick also intercepted for all touch double-taps (Safari fires synthetic dblclick
-  // handler which conflicts. Chrome does not fire synthetic dblclick on touch.
+  // on double-tap, which conflicts with zoom-image's touch zoom handler).
   let lastPointerWasTouch = false;
-  const trackPointerType = (event: PointerEvent) => {
+  node.addEventListener('pointerdown', (event) => (lastPointerWasTouch = event.pointerType === 'touch'), {
-    lastPointerWasTouch = event.pointerType === 'touch';
+    capture: true,
-  };
+    signal,
-  const suppressTouchDblClick = (event: MouseEvent) => {
+  });
-    if (lastPointerWasTouch) {
+  node.addEventListener(
-      event.stopImmediatePropagation();
+    'wheel',
-    }
+    (event) => {
-  };
+      if (isOverlayEvent(event)) {
-  node.addEventListener('pointerdown', trackPointerType, { capture: true });
+        event.stopPropagation();
-  node.addEventListener('dblclick', suppressTouchDblClick, { capture: true });
+      }
+    },
+    { capture: true, signal },
+  );
+  node.addEventListener(
+    'dblclick',
+    (event) => {
+      if (lastPointerWasTouch || isOverlayEvent(event)) {
+        event.stopImmediatePropagation();
+      }
+    },
+    { capture: true, signal },
+  );
 
-  // Allow zoomed content to render outside the container bounds
+  if (options?.zoomTarget) {
+    options.zoomTarget.style.willChange = 'transform';
+  }
   node.style.overflow = 'visible';
-  // Prevent browser handling of touch gestures so zoom-image can manage them
   node.style.touchAction = 'none';
   return {
-    update(newOptions?: { disabled?: boolean }) {
+    update(newOptions?: { zoomTarget?: HTMLElement }) {
       options = newOptions;
+      if (newOptions?.zoomTarget !== undefined) {
+        zoomInstance.setState({ zoomTarget: newOptions.zoomTarget });
+      }
     },
     destroy() {
+      controller.abort();
+      if (options?.zoomTarget) {
+        options.zoomTarget.style.willChange = '';
+      }
       for (const unsubscribe of unsubscribes) {
         unsubscribe();
       }
-      node.removeEventListener('wheel', onInteractionStart, { capture: true });
-      node.removeEventListener('pointerdown', onInteractionStart, { capture: true });
-      node.removeEventListener('pointerdown', trackPointerType, { capture: true });
-      node.removeEventListener('dblclick', suppressTouchDblClick, { capture: true });
       zoomInstance.cleanup();
     },
   };

web/src/lib/components/AdaptiveImage.svelte

@@ -1,13 +1,14 @@
 <script lang="ts">
   import { thumbhash } from '$lib/actions/thumbhash';
   import AlphaBackground from '$lib/components/AlphaBackground.svelte';
+  import Letterboxes from '$lib/components/asset-viewer/letterboxes.svelte';
   import BrokenAsset from '$lib/components/assets/broken-asset.svelte';
   import DelayedLoadingSpinner from '$lib/components/DelayedLoadingSpinner.svelte';
   import ImageLayer from '$lib/components/ImageLayer.svelte';
   import { assetViewerManager } from '$lib/managers/asset-viewer-manager.svelte';
   import { getAssetUrls } from '$lib/utils';
   import { AdaptiveImageLoader, type QualityList } from '$lib/utils/adaptive-image-loader.svelte';
-  import { scaleToCover, scaleToFit } from '$lib/utils/container-utils';
+  import { scaleToCover, scaleToFit, type Size } from '$lib/utils/container-utils';
   import { getAltText } from '$lib/utils/thumbnail-util';
   import { toTimelineAsset } from '$lib/utils/timeline-util';
   import type { AssetResponseDto, SharedLinkResponseDto } from '@immich/sdk';
@@ -17,15 +18,18 @@
     asset: AssetResponseDto;
     sharedLink?: SharedLinkResponseDto;
     objectFit?: 'contain' | 'cover';
-    container: {
+    container: Size;
-      width: number;
+    showLetterboxes?: boolean;
-      height: number;
+    transitionName?: string | null | undefined;
-    };
+    letterboxTransitionName?: string | undefined;
+    imageClass?: string;
     onUrlChange?: (url: string) => void;
     onImageReady?: () => void;
     onError?: () => void;
     ref?: HTMLDivElement;
     imgRef?: HTMLImageElement;
+    imgNaturalSize?: Size;
+    imgScaledSize?: Size;
     backdrop?: Snippet;
     overlays?: Snippet;
   };
@@ -34,10 +38,18 @@
     ref = $bindable(),
     // eslint-disable-next-line no-useless-assignment
     imgRef = $bindable(),
+    // eslint-disable-next-line no-useless-assignment
+    imgNaturalSize = $bindable(),
+    // eslint-disable-next-line no-useless-assignment
+    imgScaledSize = $bindable(),
     asset,
     sharedLink,
     objectFit = 'contain',
     container,
+    showLetterboxes = true,
+    transitionName,
+    letterboxTransitionName,
+    imageClass,
     onUrlChange,
     onImageReady,
     onError,
@@ -101,9 +113,21 @@
     return { width: 1, height: 1 };
   });
 
-  const { width, height, left, top } = $derived.by(() => {
+  $effect(() => {
+    imgNaturalSize = imageDimensions;
+  });
+
+  const scaledDimensions = $derived.by(() => {
     const scaleFn = objectFit === 'cover' ? scaleToCover : scaleToFit;
-    const { width, height } = scaleFn(imageDimensions, container);
+    return scaleFn(imageDimensions, container);
+  });
+
+  $effect(() => {
+    imgScaledSize = scaledDimensions;
+  });
+
+  const { width, height, left, top } = $derived.by(() => {
+    const { width, height } = scaledDimensions;
     return {
       width: width + 'px',
       height: height + 'px',
@@ -149,81 +173,76 @@
       (quality.preview === 'success' ? previewElement : undefined) ??
       (quality.thumbnail === 'success' ? thumbnailElement : undefined);
   });
-
-  const zoomTransform = $derived.by(() => {
-    const { currentZoom, currentPositionX, currentPositionY } = assetViewerManager.zoomState;
-    if (currentZoom === 1 && currentPositionX === 0 && currentPositionY === 0) {
-      return undefined;
-    }
-    return `translate(${currentPositionX}px, ${currentPositionY}px) scale(${currentZoom})`;
-  });
 </script>
 
-<div class="relative h-full w-full overflow-hidden will-change-transform" bind:this={ref}>
+<div class="relative h-full w-full overflow-hidden" bind:this={ref}>
   {@render backdrop?.()}
 
-  <!-- pointer-events-none so events pass through to the container where zoom-image listens -->
+  <Letterboxes {letterboxTransitionName} show={showLetterboxes} {scaledDimensions} {container} />
+
   <div
-    class="absolute inset-0 pointer-events-none"
+    class={['absolute inset-0 pointer-events-none', imageClass]}
-    style:transform={zoomTransform}
+    style:left
-    style:transform-origin={zoomTransform ? '0 0' : undefined}
+    style:top
+    style:width
+    style:height
+    style:view-transition-name={transitionName}
+    data-transition-name={transitionName}
   >
-    <div class="absolute" style:left style:top style:width style:height>
+    {#if show.alphaBackground}
-      {#if show.alphaBackground}
+      <AlphaBackground />
-        <AlphaBackground />
+    {/if}
-      {/if}
 
-      {#if show.thumbhash}
+    {#if show.thumbhash}
-        {#if asset.thumbhash}
+      {#if asset.thumbhash}
-          <!-- Thumbhash / spinner layer  -->
+        <!-- Thumbhash / spinner layer  -->
-          <canvas use:thumbhash={{ base64ThumbHash: asset.thumbhash }} class="h-full w-full absolute"></canvas>
+        <canvas use:thumbhash={{ base64ThumbHash: asset.thumbhash }} class="h-full w-full absolute"></canvas>
-        {:else if show.spinner}
+      {:else if show.spinner}
-          <DelayedLoadingSpinner />
+        <DelayedLoadingSpinner />
-        {/if}
       {/if}
+    {/if}
 
-      {#if show.thumbnail}
+    {#if show.thumbnail}
-        <ImageLayer
+      <ImageLayer
-          {adaptiveImageLoader}
+        {adaptiveImageLoader}
-          {width}
+        {width}
-          {height}
+        {height}
-          quality="thumbnail"
+        quality="thumbnail"
-          src={status.urls.thumbnail}
+        src={status.urls.thumbnail}
-          alt=""
+        alt=""
-          role="presentation"
+        role="presentation"
-          bind:ref={thumbnailElement}
+        bind:ref={thumbnailElement}
-        />
+      />
-      {/if}
+    {/if}
 
-      {#if show.brokenAsset}
+    {#if show.brokenAsset}
-        <BrokenAsset class="text-xl h-full w-full absolute" />
+      <BrokenAsset class="text-xl h-full w-full absolute" />
-      {/if}
+    {/if}
 
-      {#if show.preview}
+    {#if show.preview}
-        <ImageLayer
+      <ImageLayer
-          {adaptiveImageLoader}
+        {adaptiveImageLoader}
-          {alt}
+        {alt}
-          {width}
+        {width}
-          {height}
+        {height}
-          {overlays}
+        {overlays}
-          quality="preview"
+        quality="preview"
-          src={status.urls.preview}
+        src={status.urls.preview}
-          bind:ref={previewElement}
+        bind:ref={previewElement}
-        />
+      />
-      {/if}
+    {/if}
 
-      {#if show.original}
+    {#if show.original}
-        <ImageLayer
+      <ImageLayer
-          {adaptiveImageLoader}
+        {adaptiveImageLoader}
-          {alt}
+        {alt}
-          {width}
+        {width}
-          {height}
+        {height}
-          {overlays}
+        {overlays}
-          quality="original"
+        quality="original"
-          src={status.urls.original}
+        src={status.urls.original}
-          bind:ref={originalElement}
+        bind:ref={originalElement}
-        />
+      />
-      {/if}
+    {/if}
-    </div>
   </div>
 </div>

web/src/lib/components/asset-viewer/asset-viewer-nav-bar.svelte

@@ -1,5 +1,6 @@
 <script lang="ts">
   import { goto } from '$app/navigation';
+  import { page } from '$app/state';
   import ActionMenuItem from '$lib/components/ActionMenuItem.svelte';
   import type { OnAction, PreAction } from '$lib/components/asset-viewer/actions/action';
   import AddToStackAction from '$lib/components/asset-viewer/actions/add-to-stack-action.svelte';
@@ -17,15 +18,19 @@
   import UnstackAction from '$lib/components/asset-viewer/actions/unstack-action.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';
+  import { eventManager } from '$lib/managers/event-manager.svelte';
   import { featureFlagsManager } from '$lib/managers/feature-flags-manager.svelte';
   import { languageManager } from '$lib/managers/language-manager.svelte';
   import { Route } from '$lib/route';
+  import { viewTransitionManager } from '$lib/managers/ViewTransitionManager.svelte';
+  import { navigateToTimeline } from '$lib/utils/transition-utils';
   import { getGlobalActions } from '$lib/services/app.service';
   import { getAssetActions } from '$lib/services/asset.service';
   import { isFaceEditMode } from '$lib/stores/face-edit.svelte';
   import { user } from '$lib/stores/user.store';
   import { getSharedLink, withoutIcons } from '$lib/utils';
   import type { OnUndoDelete } from '$lib/utils/actions';
+  import { isPhotosRoute } from '$lib/utils/navigation';
   import { toTimelineAsset } from '$lib/utils/timeline-util';
   import {
     AssetTypeEnum,
@@ -184,7 +189,21 @@
             {#if !asset.isArchived && !asset.isTrashed}
               <MenuOption
                 icon={mdiImageSearch}
-                onClick={() => goto(Route.photos({ at: stack?.primaryAssetId ?? asset.id }))}
+                onClick={async () => {
+                  const assetId = stack?.primaryAssetId ?? asset.id;
+                  if (isPhotosRoute(page.route.id) && viewTransitionManager.isSupported()) {
+                    const transitionReady = eventManager.untilNext('ViewerCloseTransitionReady');
+                    eventManager.emit('ViewerCloseTransition', { id: assetId });
+                    await transitionReady;
+                    await goto(Route.photos({ at: assetId }));
+                    return;
+                  }
+
+                  navigateToTimeline(assetId, {
+                    types: ['timeline'],
+                    prepareOldSnapshot: () => eventManager.emit('ViewerOpenTransition'),
+                  });
+                }}
                 text={$t('view_in_timeline')}
               />
             {/if}

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

@@ -1,3 +1,9 @@
+<script module lang="ts">
+  const useSplitNavTransitions =
+    typeof document !== 'undefined' &&
+    getComputedStyle(document.documentElement).getPropertyValue('--immich-split-viewer-nav').trim() === 'enabled';
+</script>
+
 <script lang="ts">
   import { browser } from '$app/environment';
   import { focusTrap } from '$lib/actions/focus-trap';
@@ -13,6 +19,7 @@
   import { authManager } from '$lib/managers/auth-manager.svelte';
   import { editManager, EditToolType } from '$lib/managers/edit/edit-manager.svelte';
   import { eventManager } from '$lib/managers/event-manager.svelte';
+  import { viewTransitionManager } from '$lib/managers/ViewTransitionManager.svelte';
   import { getAssetActions } from '$lib/services/asset.service';
   import { assetViewingStore } from '$lib/stores/asset-viewing.store';
   import { isFaceEditMode } from '$lib/stores/face-edit.svelte';
@@ -27,6 +34,7 @@
   import { InvocationTracker } from '$lib/utils/invocationTracker';
   import { SlideshowHistory } from '$lib/utils/slideshow-history';
   import { toTimelineAsset } from '$lib/utils/timeline-util';
+  import { crossfadeViewerContent, removeCrossfadeOverlay } from '$lib/utils/transition-utils';
   import {
     AssetTypeEnum,
     getAssetInfo,
@@ -40,7 +48,7 @@
   import { onDestroy, onMount, untrack } from 'svelte';
   import type { SwipeCustomEvent } from 'svelte-gestures';
   import { t } from 'svelte-i18n';
-  import { fly } from 'svelte/transition';
+  import { fly, slide } from 'svelte/transition';
   import Thumbnail from '../assets/thumbnail/thumbnail.svelte';
   import ActivityStatus from './activity-status.svelte';
   import ActivityViewer from './activity-viewer.svelte';
@@ -59,7 +67,7 @@
     previousAsset?: AssetResponseDto;
   };
 
-  interface Props {
+  type Props = {
     cursor: AssetCursor;
     showNavigation?: boolean;
     withStacked?: boolean;
@@ -72,7 +80,7 @@
     onUndoDelete?: OnUndoDelete;
     onClose?: (asset: AssetResponseDto) => void;
     onRandom?: () => Promise<{ id: string } | undefined>;
-  }
+  };
 
   let {
     cursor,
@@ -89,13 +97,14 @@
     onRandom,
   }: Props = $props();
 
-  const { setAssetId } = assetViewingStore;
+  const { setAssetId, invisible } = assetViewingStore;
   const {
     restartProgress: restartSlideshowProgress,
     stopProgress: stopSlideshowProgress,
     slideshowNavigation,
     slideshowState,
     slideshowRepeat,
+    slideshowTransition,
   } = slideshowStore;
   const stackThumbnailSize = 60;
   const stackSelectedThumbnailSize = 65;
@@ -109,6 +118,10 @@
   let sharedLink = getSharedLink();
   let fullscreenElement = $state<Element>();
 
+  let slideShowPlaying = $derived($slideshowState === SlideshowState.PlaySlideshow);
+  let slideShowAscending = $derived($slideshowNavigation === SlideshowNavigation.AscendingOrder);
+  let slideShowShuffle = $derived($slideshowNavigation === SlideshowNavigation.Shuffle);
+
   let playOriginalVideo = $state($alwaysLoadOriginalVideo);
   let slideshowStartAssetId = $state<string>();
 
@@ -142,46 +155,58 @@
     }
   };
 
-  const onAssetUpdate = (updatedAsset: AssetResponseDto) => {
+  let transitionName = $state<string | undefined>('hero');
-    if (asset.id === updatedAsset.id) {
+  let letterboxTransitionName = $state<string | undefined>(undefined);
-      cursor = { ...cursor, current: updatedAsset };
+  let detailPanelTransitionName = $state<string | undefined>(undefined);
-    }
-  };
 
+  let unsubscribes: (() => void)[] = [];
   onMount(() => {
     syncAssetViewerOpenClass(true);
-    const slideshowStateUnsubscribe = slideshowState.subscribe((value) => {
-      if (value === SlideshowState.PlaySlideshow) {
-        slideshowHistory.reset();
-        slideshowHistory.queue(toTimelineAsset(asset));
-        handlePromiseError(handlePlaySlideshow());
-      } else if (value === SlideshowState.StopSlideshow) {
-        handlePromiseError(handleStopSlideshow());
-      }
-    });
 
-    const slideshowNavigationUnsubscribe = slideshowNavigation.subscribe((value) => {
+    const addInfoTransition = () => {
-      if (value === SlideshowNavigation.Shuffle) {
+      detailPanelTransitionName = 'info';
-        slideshowHistory.reset();
+      transitionName = 'hero';
-        slideshowHistory.queue(toTimelineAsset(asset));
-      }
-    });
-
-    return () => {
-      slideshowStateUnsubscribe();
-      slideshowNavigationUnsubscribe();
     };
+
+    unsubscribes.push(
+      eventManager.on({
+        ViewerOpenTransition: addInfoTransition,
+        ViewerCloseTransition: addInfoTransition,
+      }),
+      slideshowState.subscribe((value) => {
+        if (value === SlideshowState.PlaySlideshow) {
+          slideshowHistory.reset();
+          slideshowHistory.queue(toTimelineAsset(asset));
+          handlePromiseError(handlePlaySlideshow());
+        } else if (value === SlideshowState.StopSlideshow) {
+          handlePromiseError(handleStopSlideshow());
+        }
+      }),
+      slideshowNavigation.subscribe((value) => {
+        if (value === SlideshowNavigation.Shuffle) {
+          slideshowHistory.reset();
+          slideshowHistory.queue(toTimelineAsset(asset));
+        }
+      }),
+    );
   });
 
   onDestroy(() => {
     activityManager.reset();
     assetViewerManager.closeEditor();
+    isFaceEditMode.value = false;
     syncAssetViewerOpenClass(false);
     preloadManager.destroy();
+
+    for (const unsubscribe of unsubscribes) {
+      unsubscribe();
+    }
   });
 
   const closeViewer = () => {
-    onClose?.(asset);
+    transitionName = 'hero';
+    const id = stack?.primaryAssetId ?? asset.id;
+    onClose?.({ ...asset, id });
   };
 
   const closeEditor = async () => {
@@ -193,65 +218,132 @@
     assetViewerManager.closeEditor();
   };
 
+  const getTransitionName = (kind: 'old' | 'new', direction: string | null | undefined) => {
+    if (direction === 'previous' || direction === 'next') {
+      return useSplitNavTransitions ? `${direction}-${kind}` : direction;
+    }
+    return direction ?? undefined;
+  };
+
+  const clearTransitionNames = () => {
+    detailPanelTransitionName = undefined;
+    transitionName = undefined;
+    letterboxTransitionName = undefined;
+  };
+
+  const startTransition = async (
+    types: string[],
+    targetTransition: string | null,
+    navigateFn: () => Promise<boolean>,
+  ) => {
+    const oldName = getTransitionName('old', targetTransition);
+    const newName = getTransitionName('new', targetTransition);
+
+    let result = false;
+
+    await viewTransitionManager.startTransition({
+      types,
+      prepareOldSnapshot: () => {
+        transitionName = oldName;
+        letterboxTransitionName = targetTransition ? `${targetTransition}-old` : undefined;
+        detailPanelTransitionName = 'detail-panel';
+      },
+      performUpdate: async (signal) => {
+        const ready = eventManager.untilNext('ViewerOpenTransitionReady', { signal });
+        result = await navigateFn();
+        await ready;
+      },
+      prepareNewSnapshot: () => {
+        transitionName = newName;
+        letterboxTransitionName = targetTransition ? `${targetTransition}-new` : undefined;
+      },
+      onFinished: clearTransitionNames,
+    });
+
+    return result;
+  };
+
+  const completeNavigation = async (order: 'previous' | 'next', skipTransition: boolean) => {
+    preloadManager.cancelBeforeNavigation(order);
+    const skipped = viewTransitionManager.skipTransitions();
+    const canTransition = viewTransitionManager.isSupported() && !skipped && !skipTransition;
+
+    let navigate: () => Promise<boolean>;
+    let types: string[];
+    let targetTransition: string | null;
+
+    if (slideShowPlaying && slideShowShuffle) {
+      navigate = async () => {
+        let next = order === 'previous' ? slideshowHistory.previous() : slideshowHistory.next();
+        if (!next) {
+          const asset = await onRandom?.();
+          if (asset) {
+            slideshowHistory.queue(asset);
+            next = true;
+          }
+        }
+        return next;
+      };
+      types = ['slideshow'];
+      targetTransition = null;
+    } else {
+      navigate = async () => {
+        const target = order === 'previous' ? previousAsset : nextAsset;
+        return navigateToAsset(target);
+      };
+      types = slideShowPlaying ? ['slideshow'] : ['viewer-nav'];
+      targetTransition = slideShowPlaying ? null : order;
+    }
+
+    const targetAsset = order === 'previous' ? previousAsset : nextAsset;
+    const slideshowAllowsTransition = !slideShowPlaying || $slideshowTransition;
+    const useTransition = canTransition && slideshowAllowsTransition && (slideShowShuffle || !!targetAsset);
+    const hasNext = useTransition ? await startTransition(types, targetTransition, navigate) : await navigate();
+
+    if (!slideShowPlaying) {
+      return;
+    }
+
+    if (hasNext) {
+      $restartSlideshowProgress = true;
+      return;
+    }
+
+    if ($slideshowRepeat && slideshowStartAssetId) {
+      await setAssetId(slideshowStartAssetId);
+      $restartSlideshowProgress = true;
+      return;
+    }
+
+    await handleStopSlideshow();
+  };
+
   const tracker = new InvocationTracker();
-  const navigateAsset = (order?: 'previous' | 'next') => {
+  let navigating = $state(false);
+  const navigateAsset = (order?: 'previous' | 'next', skipTransition: boolean = false) => {
     if (!order) {
-      if ($slideshowState === SlideshowState.PlaySlideshow) {
+      if (slideShowPlaying) {
-        order = $slideshowNavigation === SlideshowNavigation.AscendingOrder ? 'previous' : 'next';
+        order = slideShowAscending ? 'previous' : 'next';
       } else {
         return;
       }
     }
 
-    preloadManager.cancelBeforeNavigation(order);
-
     if (tracker.isActive()) {
       return;
     }
 
-    void tracker.invoke(async () => {
+    navigating = true;
-      const isShuffle =
+    void tracker.invoke(
-        $slideshowState === SlideshowState.PlaySlideshow && $slideshowNavigation === SlideshowNavigation.Shuffle;
+      () => completeNavigation(order, skipTransition),
-
+      (error: unknown) => handleError(error, $t('error_while_navigating')),
-      let hasNext: boolean;
+      () => {
-
+        navigating = false;
-      if (isShuffle) {
+        eventManager.emit('ViewerAfterNavigate');
-        hasNext = order === 'previous' ? slideshowHistory.previous() : slideshowHistory.next();
+      },
-        if (!hasNext) {
+    );
-          const asset = await onRandom?.();
-          if (asset) {
-            slideshowHistory.queue(asset);
-            hasNext = true;
-          }
-        }
-      } else {
-        hasNext =
-          order === 'previous' ? await navigateToAsset(cursor.previousAsset) : await navigateToAsset(cursor.nextAsset);
-      }
-
-      if ($slideshowState !== SlideshowState.PlaySlideshow) {
-        return;
-      }
-
-      if (hasNext) {
-        $restartSlideshowProgress = true;
-        return;
-      }
-
-      if ($slideshowRepeat && slideshowStartAssetId) {
-        await setAssetId(slideshowStartAssetId);
-        $restartSlideshowProgress = true;
-        return;
-      }
-
-      await handleStopSlideshow();
-    }, $t('error_while_navigating'));
   };
 
-  /**
-   * Slide show mode
-   */
-
   let assetViewerHtmlElement = $state<HTMLElement>();
 
   const slideshowHistory = new SlideshowHistory((asset) => {
@@ -276,10 +368,11 @@
 
   const handleStopSlideshow = async () => {
     try {
-      if (document.fullscreenElement) {
+      if (!document.fullscreenElement) {
-        document.body.style.cursor = '';
+        return;
-        await document.exitFullscreen();
       }
+      document.body.style.cursor = '';
+      await document.exitFullscreen();
     } catch (error) {
       handleError(error, $t('errors.unable_to_exit_fullscreen'));
     } finally {
@@ -288,8 +381,24 @@
     }
   };
 
-  const handleStackedAssetMouseEvent = (isMouseOver: boolean, stackedAsset: AssetResponseDto) => {
+  const handleStackedAssetMouseEnter = (stackedAsset: AssetResponseDto) => {
-    previewStackedAsset = isMouseOver ? stackedAsset : undefined;
+    if ((previewStackedAsset ?? cursor.current).id === stackedAsset.id) {
+      return;
+    }
+
+    isFaceEditMode.value = false;
+    void crossfadeViewerContent(() => {
+      previewStackedAsset = stackedAsset;
+    });
+  };
+
+  const handleStackSlideshowMouseLeave = () => {
+    if (!previewStackedAsset) {
+      return;
+    }
+
+    removeCrossfadeOverlay();
+    previewStackedAsset = undefined;
   };
 
   const handlePreAction = (action: Action) => {
@@ -358,15 +467,18 @@
     }
   };
 
+  const refreshOcr = async () => {
+    ocrManager.clear();
+    if (sharedLink) {
+      return;
+    }
+
+    await ocrManager.getAssetOcr(asset.id);
+  };
+
   const refresh = async () => {
     await refreshStack();
-    ocrManager.clear();
+    await refreshOcr();
-    if (!sharedLink) {
-      if (previewStackedAsset) {
-        await ocrManager.getAssetOcr(previewStackedAsset.id);
-      }
-      await ocrManager.getAssetOcr(asset.id);
-    }
   };
 
   $effect(() => {
@@ -375,21 +487,36 @@
     untrack(() => handlePromiseError(refresh()));
   });
 
+  $effect(() => {
+    // eslint-disable-next-line @typescript-eslint/no-unused-expressions
+    previewStackedAsset;
+    untrack(() => ocrManager.clear());
+  });
+
   let lastCursor = $state<AssetCursor>();
 
   $effect(() => {
     if (cursor.current.id === lastCursor?.current.id) {
       return;
     }
+
     if (lastCursor) {
+      previewStackedAsset = undefined;
+      ocrManager.showOverlay = false;
       preloadManager.updateAfterNavigation(lastCursor, cursor, sharedLink);
+      lastCursor = cursor;
+      return;
     }
-    if (!lastCursor) {
+    preloadManager.initializePreloads(cursor, sharedLink);
-      preloadManager.initializePreloads(cursor, sharedLink);
-    }
     lastCursor = cursor;
   });
 
+  const onAssetUpdate = (update: AssetResponseDto) => {
+    if (asset.id === update.id) {
+      cursor = { ...cursor, current: update };
+    }
+  };
+
   const viewerKind = $derived.by(() => {
     if (previewStackedAsset) {
       return previewStackedAsset.type === AssetTypeEnum.Image ? 'PhotoViewer' : 'StackVideoViewer';
@@ -460,13 +587,17 @@
 
 <section
   id="immich-asset-viewer"
-  class="fixed start-0 top-0 grid size-full grid-cols-4 grid-rows-[64px_1fr] overflow-hidden bg-black"
+  class="fixed inset-s-0 top-0 z-10 grid size-full grid-cols-4 grid-rows-[64px_1fr] overflow-hidden bg-black touch-none"
+  class:invisible={$invisible}
+  data-navigating={navigating || undefined}
   use:focusTrap
   bind:this={assetViewerHtmlElement}
 >
-  <!-- Top navigation bar -->
   {#if $slideshowState === SlideshowState.None && !assetViewerManager.isShowEditor}
-    <div class="col-span-4 col-start-1 row-span-1 row-start-1 transition-transform">
+    <div
+      class="col-span-4 col-start-1 row-span-1 row-start-1 transition-transform"
+      style:view-transition-name="exclude"
+    >
       <AssetViewerNavBar
         {asset}
         {album}
@@ -477,7 +608,7 @@
         onAction={handleAction}
         {onUndoDelete}
         onPlaySlideshow={() => ($slideshowState = SlideshowState.PlaySlideshow)}
-        onClose={onClose ? () => onClose(asset) : undefined}
+        onClose={onClose ? closeViewer : undefined}
         {playOriginalVideo}
         {setPlayOriginalVideo}
       />
@@ -498,16 +629,21 @@
   {/if}
 
   {#if $slideshowState === SlideshowState.None && showNavigation && !assetViewerManager.isShowEditor && !isFaceEditMode.value && previousAsset}
-    <div class="my-auto col-span-1 col-start-1 row-span-full row-start-1 justify-self-start">
+    <div
+      data-test-id="previous-asset"
+      class="my-auto col-span-1 col-start-1 row-span-full row-start-1 justify-self-start"
+      style:view-transition-name="exclude-leftbutton"
+    >
       <PreviousAssetAction onPreviousAsset={() => navigateAsset('previous')} />
     </div>
   {/if}
 
-  <!-- Asset Viewer -->
   <div data-viewer-content class="z-[-1] relative col-start-1 col-span-4 row-start-1 row-span-full">
     {#if viewerKind === 'StackVideoViewer'}
       <VideoViewer
+        {transitionName}
         asset={previewStackedAsset!}
+        assetId={previewStackedAsset!.id}
         cacheKey={previewStackedAsset!.thumbhash}
         projectionType={previewStackedAsset!.exifInfo?.projectionType}
         loopVideo={true}
@@ -520,6 +656,7 @@
       />
     {:else if viewerKind === 'LiveVideoViewer'}
       <VideoViewer
+        {transitionName}
         {asset}
         assetId={asset.livePhotoVideoId!}
         cacheKey={asset.thumbhash}
@@ -531,13 +668,20 @@
         {playOriginalVideo}
       />
     {:else if viewerKind === 'ImagePanaramaViewer'}
-      <ImagePanoramaViewer {asset} />
+      <ImagePanoramaViewer {asset} {transitionName} {letterboxTransitionName} />
     {:else if viewerKind === 'CropArea'}
       <CropArea {asset} />
     {:else if viewerKind === 'PhotoViewer'}
-      <PhotoViewer cursor={{ ...cursor, current: asset }} {sharedLink} {onSwipe} />
+      <PhotoViewer
+        {transitionName}
+        {letterboxTransitionName}
+        cursor={{ ...cursor, current: asset }}
+        {sharedLink}
+        {onSwipe}
+      />
     {:else if viewerKind === 'VideoViewer'}
       <VideoViewer
+        {transitionName}
         {asset}
         cacheKey={asset.thumbhash}
         projectionType={asset.exifInfo?.projectionType}
@@ -571,15 +715,20 @@
   </div>
 
   {#if $slideshowState === SlideshowState.None && showNavigation && !assetViewerManager.isShowEditor && !isFaceEditMode.value && nextAsset}
-    <div class="my-auto col-span-1 col-start-4 row-span-full row-start-1 justify-self-end">
+    <div
+      data-test-id="next-asset"
+      class="my-auto col-span-1 col-start-4 row-span-full row-start-1 justify-self-end"
+      style:view-transition-name="exclude-rightbutton"
+    >
       <NextAssetAction onNextAsset={() => navigateAsset('next')} />
     </div>
   {/if}
 
   {#if showDetailPanel || assetViewerManager.isShowEditor}
     <div
-      transition:fly={{ duration: 150 }}
+      transition:slide={{ axis: 'x', duration: 150 }}
       id="detail-panel"
+      style:view-transition-name={detailPanelTransitionName}
       class="row-start-1 row-span-4 overflow-y-auto transition-all dark:border-l dark:border-s-immich-dark-gray bg-light"
       translate="yes"
     >
@@ -595,9 +744,14 @@
     </div>
   {/if}
 
-  {#if stack && withStacked && !assetViewerManager.isShowEditor}
+  {#if stack && withStacked && !assetViewerManager.isShowEditor && $slideshowState === SlideshowState.None}
     {@const stackedAssets = stack.assets}
-    <div id="stack-slideshow" class="absolute bottom-0 w-full col-span-4 col-start-1 pointer-events-none">
+    <!-- svelte-ignore a11y_no_static_element_interactions -->
+    <div
+      id="stack-slideshow"
+      class="absolute bottom-0 w-full col-span-4 col-start-1 pointer-events-none"
+      onmouseleave={handleStackSlideshowMouseLeave}
+    >
       <div class="relative flex flex-row no-wrap overflow-x-auto overflow-y-hidden horizontal-scrollbar">
         {#each stackedAssets as stackedAsset (stackedAsset.id)}
           <div
@@ -610,10 +764,12 @@
               dimmed={stackedAsset.id !== asset.id}
               asset={toTimelineAsset(stackedAsset)}
               onClick={() => {
+                removeCrossfadeOverlay();
                 cursor.current = stackedAsset;
                 previewStackedAsset = undefined;
+                isFaceEditMode.value = false;
               }}
-              onMouseEvent={({ isMouseOver }) => handleStackedAssetMouseEvent(isMouseOver, stackedAsset)}
+              onMouseEvent={({ isMouseOver }) => isMouseOver && handleStackedAssetMouseEnter(stackedAsset)}
               readonly
               thumbnailSize={stackedAsset.id === asset.id ? stackSelectedThumbnailSize : stackThumbnailSize}
               showStackedIcon={false}

web/src/lib/components/asset-viewer/detail-panel.svelte

@@ -7,10 +7,11 @@
   import { timeToLoadTheMap } from '$lib/constants';
   import { assetViewerManager } from '$lib/managers/asset-viewer-manager.svelte';
   import { authManager } from '$lib/managers/auth-manager.svelte';
+  import { eventManager } from '$lib/managers/event-manager.svelte';
   import { featureFlagsManager } from '$lib/managers/feature-flags-manager.svelte';
   import AssetChangeDateModal from '$lib/modals/AssetChangeDateModal.svelte';
   import { Route } from '$lib/route';
-  import { isFaceEditMode } from '$lib/stores/face-edit.svelte';
+  import { isEditFacesPanelOpen, isFaceEditMode } from '$lib/stores/face-edit.svelte';
   import { boundingBoxesArray } from '$lib/stores/people.store';
   import { locale } from '$lib/stores/preferences.store';
   import { preferences, user } from '$lib/stores/user.store';
@@ -49,15 +50,15 @@
   import UserAvatar from '../shared-components/user-avatar.svelte';
   import AlbumListItemDetails from './album-list-item-details.svelte';
 
-  interface Props {
+  type Props = {
     asset: AssetResponseDto;
     currentAlbum?: AlbumResponseDto | null;
-  }
+  };
 
   let { asset, currentAlbum = null }: Props = $props();
 
   let showAssetPath = $state(false);
-  let showEditFaces = $state(false);
+  let showEditFaces = $derived(isEditFacesPanelOpen.value);
   let isOwner = $derived($user?.id === asset.ownerId);
   let people = $derived(asset.people || []);
   let unassignedFaces = $derived(asset.unassignedFaces || []);
@@ -106,7 +107,7 @@
       return;
     }
 
-    showEditFaces = false;
+    isEditFacesPanelOpen.value = false;
     previousId = asset.id;
   });
 
@@ -122,7 +123,8 @@
 
   const handleRefreshPeople = async () => {
     asset = await getAssetInfo({ id: asset.id });
-    showEditFaces = false;
+    eventManager.emit('AssetUpdate', asset);
+    isEditFacesPanelOpen.value = false;
   };
 
   const getAssetFolderHref = (asset: AssetResponseDto) => {
@@ -219,7 +221,7 @@
               shape="round"
               color="secondary"
               variant="ghost"
-              onclick={() => (showEditFaces = true)}
+              onclick={() => (isEditFacesPanelOpen.value = true)}
             />
           {/if}
         </div>
@@ -228,13 +230,14 @@
       <div class="mt-2 flex flex-wrap gap-2">
         {#each people as person, index (person.id)}
           {#if showingHiddenPeople || !person.isHidden}
+            {@const isHighlighted = people[index].faces.some((f) => $boundingBoxesArray.some((b) => b.id === f.id))}
             <a
-              class="w-22"
+              class="group w-22 outline-none"
               href={Route.viewPerson(person, { previousRoute })}
               onfocus={() => ($boundingBoxesArray = people[index].faces)}
               onblur={() => ($boundingBoxesArray = [])}
-              onmouseover={() => ($boundingBoxesArray = people[index].faces)}
+              onpointerover={() => ($boundingBoxesArray = people[index].faces)}
-              onmouseleave={() => ($boundingBoxesArray = [])}
+              onpointerleave={() => ($boundingBoxesArray = [])}
             >
               <div class="relative">
                 <ImageThumbnail
@@ -246,6 +249,8 @@
                   widthStyle="90px"
                   heightStyle="90px"
                   hidden={person.isHidden}
+                  highlighted={isHighlighted}
+                  class="group-focus-visible:outline-2 group-focus-visible:outline-offset-2 group-focus-visible:outline-immich-primary dark:group-focus-visible:outline-immich-dark-primary"
                 />
               </div>
               <p class="mt-1 truncate font-medium" title={person.name}>{person.name}</p>
@@ -574,7 +579,7 @@
   <PersonSidePanel
     assetId={asset.id}
     assetType={asset.type}
-    onClose={() => (showEditFaces = false)}
+    onClose={() => (isEditFacesPanelOpen.value = false)}
     onRefresh={handleRefreshPeople}
   />
 {/if}

web/src/lib/components/asset-viewer/editor/transform-tool/crop-area.svelte

@@ -7,6 +7,7 @@
   import { Icon } from '@immich/ui';
   import { onMount } from 'svelte';
   import { t } from 'svelte-i18n';
+  import { eventManager } from '$lib/managers/event-manager.svelte';
 
   interface Props {
     asset: AssetResponseDto;
@@ -74,6 +75,8 @@
       alt={$getAltText(toTimelineAsset(asset))}
       class="h-full select-none transition-transform motion-reduce:transition-none"
       style:transform={imageTransform}
+      onload={() => eventManager.emit('ViewerOpenTransitionReady')}
+      onerror={() => eventManager.emit('ViewerOpenTransitionReady')}
     />
     <div
       class={[

web/src/lib/components/asset-viewer/face-editor/face-editor.svelte

@@ -1,10 +1,12 @@
 <script lang="ts">
   import ImageThumbnail from '$lib/components/assets/thumbnail/image-thumbnail.svelte';
+  import { assetViewerManager } from '$lib/managers/asset-viewer-manager.svelte';
   import { assetViewingStore } from '$lib/stores/asset-viewing.store';
   import { isFaceEditMode } from '$lib/stores/face-edit.svelte';
   import { getPeopleThumbnailUrl } from '$lib/utils';
-  import { getNaturalSize, scaleToFit } from '$lib/utils/container-utils';
+  import { computeContentMetrics, mapContentRectToNatural, type Size } from '$lib/utils/container-utils';
   import { handleError } from '$lib/utils/handle-error';
+  import { scaleFaceRectOnResize, type ResizeContext } from '$lib/utils/people-utils';
   import { createFace, getAllPeople, type PersonResponseDto } from '@immich/sdk';
   import { shortcut } from '$lib/actions/shortcut';
   import { Button, Input, modalManager, toastManager } from '@immich/ui';
@@ -12,17 +14,19 @@
   import { clamp } from 'lodash-es';
   import { onMount } from 'svelte';
   import { t } from 'svelte-i18n';
+  import { fade } from 'svelte/transition';
 
-  interface Props {
+  type Props = {
-    htmlElement: HTMLImageElement | HTMLVideoElement;
+    imageSize: Size;
     containerWidth: number;
     containerHeight: number;
     assetId: string;
-  }
+  };
 
-  let { htmlElement, containerWidth, containerHeight, assetId }: Props = $props();
+  let { imageSize, containerWidth, containerHeight, assetId }: Props = $props();
 
   let canvasEl: HTMLCanvasElement | undefined = $state();
+  let containerEl: HTMLDivElement | undefined = $state();
   let canvas: Canvas | undefined = $state();
   let faceRect: Rect | undefined = $state();
   let faceSelectorEl: HTMLDivElement | undefined = $state();
@@ -32,6 +36,9 @@
 
   let searchTerm = $state('');
   let faceBoxPosition = $state({ left: 0, top: 0, width: 0, height: 0 });
+  let userMovedRect = false;
+  let previousMetrics: ResizeContext | null = null;
+  let panModifierHeld = $state(false);
 
   let filteredCandidates = $derived(
     searchTerm
@@ -53,11 +60,12 @@
   };
 
   const setupCanvas = () => {
-    if (!canvasEl || !htmlElement) {
+    if (!canvasEl) {
       return;
     }
 
-    canvas = new Canvas(canvasEl);
+    canvas = new Canvas(canvasEl, { width: containerWidth, height: containerHeight });
+    canvas.selection = false;
     configureControlStyle();
 
     // eslint-disable-next-line tscompat/tscompat
@@ -75,66 +83,103 @@
 
     canvas.add(faceRect);
     canvas.setActiveObject(faceRect);
-    setDefaultFaceRectanglePosition(faceRect);
   };
 
-  onMount(async () => {
+  onMount(() => {
-    setupCanvas();
+    void getPeople();
-    await getPeople();
   });
 
-  const imageContentMetrics = $derived.by(() => {
-    const natural = getNaturalSize(htmlElement);
-    const container = { width: containerWidth, height: containerHeight };
-    const { width: contentWidth, height: contentHeight } = scaleToFit(natural, container);
-    return {
-      contentWidth,
-      contentHeight,
-      offsetX: (containerWidth - contentWidth) / 2,
-      offsetY: (containerHeight - contentHeight) / 2,
-    };
-  });
-
-  const setDefaultFaceRectanglePosition = (faceRect: Rect) => {
-    const { offsetX, offsetY } = imageContentMetrics;
-
-    faceRect.set({
-      top: offsetY + 200,
-      left: offsetX + 200,
-    });
-
-    faceRect.setCoords();
-    positionFaceSelector();
-  };
-
   $effect(() => {
     if (!canvas) {
       return;
     }
 
-    canvas.setDimensions({
+    const upperCanvas = canvas.upperCanvasEl;
-      width: containerWidth,
+    const controller = new AbortController();
-      height: containerHeight,
+    const { signal } = controller;
-    });
 
-    if (!faceRect) {
+    const stopIfOnTarget = (event: PointerEvent) => {
+      if (canvas?.findTarget(event).target) {
+        event.stopPropagation();
+      }
+    };
+
+    const handlePointerDown = (event: PointerEvent) => {
+      if (!canvas) {
+        return;
+      }
+      if (canvas.findTarget(event).target) {
+        event.stopPropagation();
+        return;
+      }
+      if (faceRect) {
+        event.stopPropagation();
+        const pointer = canvas.getScenePoint(event);
+        faceRect.set({ left: pointer.x, top: pointer.y });
+        faceRect.setCoords();
+        userMovedRect = true;
+        canvas.renderAll();
+        positionFaceSelector();
+      }
+    };
+
+    upperCanvas.addEventListener('pointerdown', handlePointerDown, { signal });
+    upperCanvas.addEventListener('pointermove', stopIfOnTarget, { signal });
+    upperCanvas.addEventListener('pointerup', stopIfOnTarget, { signal });
+
+    return () => {
+      controller.abort();
+    };
+  });
+
+  const imageContentMetrics = $derived.by(() => {
+    if (imageSize.width === 0 || imageSize.height === 0) {
+      return { contentWidth: 0, contentHeight: 0, offsetX: 0, offsetY: 0 };
+    }
+    return computeContentMetrics(imageSize, { width: containerWidth, height: containerHeight });
+  });
+
+  const setDefaultFaceRectanglePosition = (faceRect: Rect) => {
+    const { offsetX, offsetY, contentWidth, contentHeight } = imageContentMetrics;
+
+    faceRect.set({
+      top: offsetY + contentHeight / 2 - 56,
+      left: offsetX + contentWidth / 2 - 56,
+    });
+  };
+
+  $effect(() => {
+    const { offsetX, offsetY, contentWidth } = imageContentMetrics;
+
+    if (contentWidth === 0) {
       return;
     }
 
-    if (!isFaceRectIntersectingCanvas(faceRect, canvas)) {
+    const isFirstRun = previousMetrics === null;
+
+    if (isFirstRun && !canvas) {
+      setupCanvas();
+    }
+
+    if (!canvas || !faceRect) {
+      return;
+    }
+
+    if (!isFirstRun) {
+      canvas.setDimensions({ width: containerWidth, height: containerHeight });
+    }
+
+    if (!isFirstRun && userMovedRect && previousMetrics) {
+      faceRect.set(scaleFaceRectOnResize(faceRect, previousMetrics, { contentWidth, offsetX, offsetY }));
+    } else {
       setDefaultFaceRectanglePosition(faceRect);
     }
-  });
 
-  const isFaceRectIntersectingCanvas = (faceRect: Rect, canvas: Canvas) => {
+    faceRect.setCoords();
-    const faceBox = faceRect.getBoundingRect();
+    previousMetrics = { contentWidth, offsetX, offsetY };
-    return !(
+    canvas.renderAll();
-      0 > faceBox.left + faceBox.width ||
+    positionFaceSelector();
-      0 > faceBox.top + faceBox.height ||
+  });
-      canvas.width < faceBox.left ||
-      canvas.height < faceBox.top
-    );
-  };
 
   const cancel = () => {
     isFaceEditMode.value = false;
@@ -164,11 +209,15 @@
     const gap = 15;
     const padding = faceRect.padding ?? 0;
     const rawBox = faceRect.getBoundingRect();
+    if (Number.isNaN(rawBox.left) || Number.isNaN(rawBox.width)) {
+      return;
+    }
+    const { currentZoom, currentPositionX, currentPositionY } = assetViewerManager.zoomState;
     const faceBox = {
-      left: rawBox.left - padding,
+      left: (rawBox.left - padding) * currentZoom + currentPositionX,
-      top: rawBox.top - padding,
+      top: (rawBox.top - padding) * currentZoom + currentPositionY,
-      width: rawBox.width + padding * 2,
+      width: (rawBox.width + padding * 2) * currentZoom,
-      height: rawBox.height + padding * 2,
+      height: (rawBox.height + padding * 2) * currentZoom,
     };
     const selectorWidth = faceSelectorEl.offsetWidth;
     const chromeHeight = faceSelectorEl.offsetHeight - scrollableListEl.offsetHeight;
@@ -178,20 +227,21 @@
     const clampTop = (top: number) => clamp(top, gap, containerHeight - selectorHeight - gap);
     const clampLeft = (left: number) => clamp(left, gap, containerWidth - selectorWidth - gap);
 
-    const overlapArea = (position: { top: number; left: number }) => {
+    const faceRight = faceBox.left + faceBox.width;
-      const selectorRight = position.left + selectorWidth;
+    const faceBottom = faceBox.top + faceBox.height;
-      const selectorBottom = position.top + selectorHeight;
-      const faceRight = faceBox.left + faceBox.width;
-      const faceBottom = faceBox.top + faceBox.height;
 
-      const overlapX = Math.max(0, Math.min(selectorRight, faceRight) - Math.max(position.left, faceBox.left));
+    const overlapArea = (position: { top: number; left: number }) => {
-      const overlapY = Math.max(0, Math.min(selectorBottom, faceBottom) - Math.max(position.top, faceBox.top));
+      const overlapX = Math.max(
+        0,
+        Math.min(position.left + selectorWidth, faceRight) - Math.max(position.left, faceBox.left),
+      );
+      const overlapY = Math.max(
+        0,
+        Math.min(position.top + selectorHeight, faceBottom) - Math.max(position.top, faceBox.top),
+      );
       return overlapX * overlapY;
     };
 
-    const faceBottom = faceBox.top + faceBox.height;
-    const faceRight = faceBox.left + faceBox.width;
-
     const positions = [
       { top: clampTop(faceBottom + gap), left: clampLeft(faceBox.left) },
       { top: clampTop(faceBox.top - selectorHeight - gap), left: clampLeft(faceBox.left) },
@@ -213,45 +263,139 @@
       }
     }
 
-    faceSelectorEl.style.top = `${bestPosition.top}px`;
+    const containerRect = containerEl?.getBoundingClientRect();
-    faceSelectorEl.style.left = `${bestPosition.left}px`;
+    const offsetTop = containerRect?.top ?? 0;
+    const offsetLeft = containerRect?.left ?? 0;
+    faceSelectorEl.style.top = `${bestPosition.top + offsetTop}px`;
+    faceSelectorEl.style.left = `${bestPosition.left + offsetLeft}px`;
     scrollableListEl.style.height = `${listHeight}px`;
-    faceBoxPosition = { left: faceBox.left, top: faceBox.top, width: faceBox.width, height: faceBox.height };
+    faceBoxPosition = faceBox;
   };
 
+  $effect(() => {
+    if (!canvas) {
+      return;
+    }
+
+    const { currentZoom, currentPositionX, currentPositionY } = assetViewerManager.zoomState;
+    canvas.setViewportTransform([currentZoom, 0, 0, currentZoom, currentPositionX, currentPositionY]);
+    canvas.renderAll();
+    positionFaceSelector();
+  });
+
   $effect(() => {
     const rect = faceRect;
     if (rect) {
-      rect.on('moving', positionFaceSelector);
+      const onUserMove = () => {
-      rect.on('scaling', positionFaceSelector);
+        userMovedRect = true;
+        positionFaceSelector();
+      };
+      rect.on('moving', onUserMove);
+      rect.on('scaling', onUserMove);
       return () => {
-        rect.off('moving', positionFaceSelector);
+        rect.off('moving', onUserMove);
-        rect.off('scaling', positionFaceSelector);
+        rect.off('scaling', onUserMove);
       };
     }
   });
 
+  const isMac = typeof navigator !== 'undefined' && /Mac|iPhone|iPad|iPod/.test(navigator.userAgent);
+  const panModifierKey = isMac ? 'Meta' : 'Control';
+  const panModifierLabel = isMac ? '⌘' : 'Ctrl';
+  const isZoomed = $derived(assetViewerManager.zoom > 1);
+
+  $effect(() => {
+    if (!containerEl) {
+      return;
+    }
+    const element = containerEl;
+    const parent = element.parentElement;
+
+    const activate = () => {
+      panModifierHeld = true;
+      element.style.pointerEvents = 'none';
+      if (parent) {
+        parent.style.cursor = 'move';
+      }
+    };
+
+    const deactivate = () => {
+      panModifierHeld = false;
+      element.style.pointerEvents = '';
+      if (parent) {
+        parent.style.cursor = '';
+      }
+    };
+
+    const onKeyDown = (event: KeyboardEvent) => {
+      if (event.key === panModifierKey) {
+        activate();
+      }
+    };
+    const onKeyUp = (event: KeyboardEvent) => {
+      if (event.key === panModifierKey) {
+        deactivate();
+      }
+    };
+
+    document.addEventListener('keydown', onKeyDown);
+    document.addEventListener('keyup', onKeyUp);
+    window.addEventListener('blur', deactivate);
+
+    return () => {
+      document.removeEventListener('keydown', onKeyDown);
+      document.removeEventListener('keyup', onKeyUp);
+      window.removeEventListener('blur', deactivate);
+      deactivate();
+    };
+  });
+
+  const trapEvents = (node: HTMLElement) => {
+    const stop = (e: Event) => e.stopPropagation();
+    const eventTypes = ['keydown', 'pointerdown', 'pointermove', 'pointerup'] as const;
+    for (const type of eventTypes) {
+      node.addEventListener(type, stop);
+    }
+
+    // Move to body so the selector isn't affected by the zoom transform on the container
+    document.body.append(node);
+
+    return {
+      destroy() {
+        for (const type of eventTypes) {
+          node.removeEventListener(type, stop);
+        }
+        node.remove();
+      },
+    };
+  };
+
   const getFaceCroppedCoordinates = () => {
-    if (!faceRect || !htmlElement) {
+    if (!faceRect || imageSize.width === 0 || imageSize.height === 0) {
       return;
     }
 
-    const { left, top, width, height } = faceRect.getBoundingRect();
+    const scaledWidth = faceRect.getScaledWidth();
-    const { offsetX, offsetY, contentWidth, contentHeight } = imageContentMetrics;
+    const scaledHeight = faceRect.getScaledHeight();
-    const natural = getNaturalSize(htmlElement);
 
-    const scaleX = natural.width / contentWidth;
+    const imageRect = mapContentRectToNatural(
-    const scaleY = natural.height / contentHeight;
+      {
-    const imageX = (left - offsetX) * scaleX;
+        left: faceRect.left - scaledWidth / 2,
-    const imageY = (top - offsetY) * scaleY;
+        top: faceRect.top - scaledHeight / 2,
+        width: scaledWidth,
+        height: scaledHeight,
+      },
+      imageContentMetrics,
+      imageSize,
+    );
 
     return {
-      imageWidth: natural.width,
+      imageWidth: imageSize.width,
-      imageHeight: natural.height,
+      imageHeight: imageSize.height,
-      x: Math.floor(imageX),
+      x: Math.floor(imageRect.left),
-      y: Math.floor(imageY),
+      y: Math.floor(imageRect.top),
-      width: Math.floor(width * scaleX),
+      width: Math.floor(imageRect.width),
-      height: Math.floor(height * scaleY),
+      height: Math.floor(imageRect.height),
     };
   };
 
@@ -282,10 +426,9 @@
       });
 
       await assetViewingStore.setAssetId(assetId);
+      isFaceEditMode.value = false;
     } catch (error) {
       handleError(error, 'Error tagging face');
-    } finally {
-      isFaceEditMode.value = false;
     }
   };
 </script>
@@ -294,6 +437,7 @@
 
 <div
   id="face-editor-data"
+  bind:this={containerEl}
   class="absolute start-0 top-0 z-5 h-full w-full overflow-hidden"
   data-face-left={faceBoxPosition.left}
   data-face-top={faceBoxPosition.top}
@@ -305,7 +449,9 @@
   <div
     id="face-selector"
     bind:this={faceSelectorEl}
-    class="absolute top-[calc(50%-250px)] start-[calc(50%-125px)] max-w-[250px] w-[250px] bg-white dark:bg-immich-dark-gray dark:text-immich-dark-fg backdrop-blur-sm px-2 py-4 rounded-xl border border-gray-200 dark:border-gray-800 transition-[top,left] duration-200 ease-out"
+    class="fixed z-20 w-[min(200px,45vw)] min-w-48 bg-white dark:bg-immich-dark-gray dark:text-immich-dark-fg backdrop-blur-sm px-2 py-4 rounded-xl border border-gray-200 dark:border-gray-800 transition-[top,left] duration-200 ease-out"
+    use:trapEvents
+    onwheel={(e) => e.stopPropagation()}
   >
     <p class="text-center text-sm">{$t('select_person_to_tag')}</p>
 
@@ -346,4 +492,15 @@
 
     <Button size="small" fullWidth onclick={cancel} color="danger" class="mt-2">{$t('cancel')}</Button>
   </div>
+
+  {#if isZoomed && !panModifierHeld}
+    <div
+      transition:fade={{ duration: 200 }}
+      class="absolute bottom-4 inset-s-1/2 -translate-x-1/2 pointer-events-none z-10"
+    >
+      <p class="bg-black/60 text-white text-xs px-3 py-1.5 rounded-full whitespace-nowrap">
+        {$t('hold_key_to_pan', { values: { key: panModifierLabel } })}
+      </p>
+    </div>
+  {/if}
 </div>

web/src/lib/components/asset-viewer/image-panorama-viewer.svelte

@@ -4,13 +4,14 @@
   import { AssetMediaSize, viewAsset, type AssetResponseDto } from '@immich/sdk';
   import { LoadingSpinner } from '@immich/ui';
   import { t } from 'svelte-i18n';
-  import { fade } from 'svelte/transition';
 
   type Props = {
+    transitionName?: string;
+    letterboxTransitionName?: string;
     asset: AssetResponseDto;
   };
 
-  let { asset }: Props = $props();
+  let { transitionName, letterboxTransitionName, asset }: Props = $props();
 
   const assetId = $derived(asset.id);
 
@@ -20,11 +21,16 @@
   };
 </script>
 
-<div transition:fade={{ duration: 150 }} class="flex h-full select-none place-content-center place-items-center">
+<div class="flex h-dvh w-dvw select-none place-content-center place-items-center">
   {#await Promise.all([loadAssetData(assetId), import('./photo-sphere-viewer-adapter.svelte')])}
     <LoadingSpinner />
   {:then [data, { default: PhotoSphereViewer }]}
-    <PhotoSphereViewer panorama={data} originalPanorama={getAssetUrl({ asset, forceOriginal: true })} />
+    <PhotoSphereViewer
+      {transitionName}
+      {letterboxTransitionName}
+      panorama={data}
+      originalPanorama={getAssetUrl({ asset, forceOriginal: true })}
+    />
   {:catch}
     {$t('errors.failed_to_load_asset')}
   {/await}

web/src/lib/components/asset-viewer/letterboxes.svelte

@@ -0,0 +1,68 @@
+<script lang="ts">
+  interface Props {
+    letterboxTransitionName?: string | undefined;
+    show?: boolean;
+    scaledDimensions: {
+      width: number;
+      height: number;
+    };
+    container: {
+      width: number;
+      height: number;
+    };
+  }
+
+  let { letterboxTransitionName, show = true, scaledDimensions, container }: Props = $props();
+
+  const shouldShowLetterboxes = $derived(show && !!letterboxTransitionName);
+
+  const letterboxes = $derived.by(() => {
+    const { width, height } = scaledDimensions;
+    const horizontalOffset = (container.width - width) / 2;
+    const verticalOffset = (container.height - height) / 2;
+
+    return [
+      {
+        name: 'letterbox-left',
+        width: horizontalOffset + 'px',
+        height: container.height + 'px',
+        left: '0px',
+        top: '0px',
+      },
+      {
+        name: 'letterbox-right',
+        width: horizontalOffset + 'px',
+        height: container.height + 'px',
+        left: container.width - horizontalOffset + 'px',
+        top: '0px',
+      },
+      {
+        name: 'letterbox-top',
+        width: width + 'px',
+        height: verticalOffset + 'px',
+        left: horizontalOffset + 'px',
+        top: '0px',
+      },
+      {
+        name: 'letterbox-bottom',
+        width: width + 'px',
+        height: verticalOffset + 'px',
+        left: horizontalOffset + 'px',
+        top: container.height - verticalOffset + 'px',
+      },
+    ];
+  });
+</script>
+
+{#if shouldShowLetterboxes}
+  {#each letterboxes as box (box.name)}
+    <div
+      class="absolute"
+      style:view-transition-name={box.name}
+      style:left={box.left}
+      style:top={box.top}
+      style:width={box.width}
+      style:height={box.height}
+    ></div>
+  {/each}
+{/if}

web/src/lib/components/asset-viewer/ocr-bounding-box.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+  import { mediaQueryManager } from '$lib/stores/media-query-manager.svelte';
   import type { OcrBox } from '$lib/utils/ocr-utils';
   import { calculateBoundingBoxMatrix, calculateFittedFontSize } from '$lib/utils/ocr-utils';
 
@@ -8,6 +9,7 @@
 
   let { ocrBox }: Props = $props();
 
+  const isTouch = $derived(mediaQueryManager.pointerCoarse);
   const dimensions = $derived(calculateBoundingBoxMatrix(ocrBox.points));
 
   const transform = $derived(`matrix3d(${dimensions.matrix.join(',')})`);
@@ -15,13 +17,23 @@
     calculateFittedFontSize(ocrBox.text, dimensions.width, dimensions.height, ocrBox.verticalMode) + 'px',
   );
 
+  const handleSelectStart = (event: Event) => {
+    const target = event.currentTarget as HTMLElement;
+    requestAnimationFrame(() => {
+      const selection = globalThis.getSelection();
+      if (selection) {
+        selection.selectAllChildren(target);
+      }
+    });
+  };
+
   const verticalStyle = $derived.by(() => {
     switch (ocrBox.verticalMode) {
       case 'cjk': {
-        return ' writing-mode: vertical-rl;';
+        return 'writing-mode: vertical-rl;';
       }
       case 'rotated': {
-        return ' writing-mode: vertical-rl; text-orientation: sideways;';
+        return 'writing-mode: vertical-rl; text-orientation: sideways;';
       }
       default: {
         return '';
@@ -30,17 +42,23 @@
   });
 </script>
 
-<div class="absolute left-0 top-0">
+<div
-  <div
+  class={[
-    class="absolute flex items-center justify-center text-transparent border-2 border-blue-500 bg-blue-500/10 pointer-events-auto cursor-text select-text transition-colors hover:z-1 hover:text-white hover:bg-black/60 hover:border-blue-600 hover:border-3 focus:z-1 focus:text-white focus:bg-black/60 focus:border-blue-600 focus:border-3 focus:outline-none {ocrBox.verticalMode ===
+    'absolute left-0 top-0 flex items-center justify-center',
-    'none'
+    'border-2 border-blue-500 pointer-events-auto cursor-text',
-      ? 'px-2 py-1 whitespace-nowrap'
+    'focus:z-1 focus:border-blue-600 focus:border-3 focus:outline-none',
-      : 'px-1 py-2'}"
+    isTouch
-    style="font-size: {fontSize}; width: {dimensions.width}px; height: {dimensions.height}px; transform: {transform}; transform-origin: 0 0;{verticalStyle}"
+      ? 'text-white bg-black/60 select-all'
-    tabindex="0"
+      : 'select-text text-transparent bg-blue-500/10 transition-colors hover:z-1 hover:text-white hover:bg-black/60 hover:border-blue-600 hover:border-3',
-    role="button"
+    ocrBox.verticalMode === 'none' ? 'px-2 py-1 whitespace-nowrap' : 'px-1 py-2',
-    aria-label={ocrBox.text}
+  ]}
-  >
+  style="font-size: {fontSize}; width: {dimensions.width}px; height: {dimensions.height}px; transform: {transform}; transform-origin: 0 0; touch-action: none; {verticalStyle}"
-    {ocrBox.text}
+  data-testid="ocr-box"
-  </div>
+  data-overlay-interactive
+  tabindex="0"
+  role="button"
+  aria-label={ocrBox.text}
+  onselectstart={isTouch ? handleSelectStart : undefined}
+>
+  {ocrBox.text}
 </div>

web/src/lib/components/asset-viewer/photo-sphere-viewer-adapter.svelte

@@ -1,7 +1,9 @@
 <script lang="ts">
   import { shortcuts } from '$lib/actions/shortcut';
   import AssetViewerEvents from '$lib/components/AssetViewerEvents.svelte';
+  import Letterboxes from '$lib/components/asset-viewer/letterboxes.svelte';
   import { assetViewerManager } from '$lib/managers/asset-viewer-manager.svelte';
+  import { eventManager } from '$lib/managers/event-manager.svelte';
   import { ocrManager, type OcrBoundingBox } from '$lib/stores/ocr.svelte';
   import { boundingBoxesArray, type Faces } from '$lib/stores/people.store';
   import { alwaysLoadOriginalFile } from '$lib/stores/preferences.store';
@@ -41,6 +43,8 @@
     'flex items-center justify-center text-white bg-black/50 cursor-text pointer-events-auto whitespace-pre-wrap wrap-break-word select-text';
 
   type Props = {
+    transitionName?: string;
+    letterboxTransitionName?: string;
     panorama: string | { source: string };
     originalPanorama?: string | { source: string };
     adapter?: AdapterConstructor | [AdapterConstructor, unknown];
@@ -48,11 +52,21 @@
     navbar?: boolean;
   };
 
-  let { panorama, originalPanorama, adapter = EquirectangularAdapter, plugins = [], navbar = false }: Props = $props();
+  let {
+    transitionName,
+    letterboxTransitionName,
+    panorama,
+    originalPanorama,
+    adapter = EquirectangularAdapter,
+    plugins = [],
+    navbar = false,
+  }: Props = $props();
 
   let container: HTMLDivElement | undefined = $state();
   let viewer: Viewer;
 
+  const fullscreenDimensions = { width: globalThis.innerWidth || 0, height: globalThis.innerHeight || 0 };
+
   let animationInProgress: { cancel: () => void } | undefined;
   let previousFaces: Faces[] = [];
 
@@ -128,10 +142,8 @@
     }
 
     const boxes = getOcrBoundingBoxes(ocrData, {
-      contentWidth: viewer.state.textureData.panoData.croppedWidth,
+      width: viewer.state.textureData.panoData.croppedWidth,
-      contentHeight: viewer.state.textureData.panoData.croppedHeight,
+      height: viewer.state.textureData.panoData.croppedHeight,
-      offsetX: 0,
-      offsetY: 0,
     });
 
     for (const [index, box] of boxes.entries()) {
@@ -212,6 +224,7 @@
       zoomSpeed: 0.5,
       fisheye: false,
     });
+    viewer.addEventListener('ready', () => eventManager.emit('ViewerOpenTransitionReady'), { once: true });
     const resolutionPlugin = viewer.getPlugin<ResolutionPlugin>(ResolutionPlugin);
     const zoomHandler = ({ zoomLevel }: events.ZoomUpdatedEvent) => {
       // zoomLevel is 0-100
@@ -256,7 +269,15 @@
 <AssetViewerEvents {onZoom} />
 
 <svelte:document use:shortcuts={[{ shortcut: { key: 'z' }, onShortcut: onZoom, preventDefault: true }]} />
-<div class="h-full w-full mb-0" bind:this={container}></div>
+<div
+  id="sphere"
+  class="h-full w-full h-dvh w-dvw mb-0"
+  bind:this={container}
+  style:view-transition-name={transitionName}
+></div>
+
+<!-- Zero-sized letterboxes for view transitions from/to regular photos -->
+<Letterboxes {letterboxTransitionName} scaledDimensions={fullscreenDimensions} container={fullscreenDimensions} />
 
 <style>
   /* Reset the default tooltip styling */

web/src/lib/components/asset-viewer/photo-viewer.svelte

@@ -8,13 +8,14 @@
   import AssetViewerEvents from '$lib/components/AssetViewerEvents.svelte';
   import { assetViewerManager } from '$lib/managers/asset-viewer-manager.svelte';
   import { castManager } from '$lib/managers/cast-manager.svelte';
-  import { isFaceEditMode } from '$lib/stores/face-edit.svelte';
+  import { eventManager } from '$lib/managers/event-manager.svelte';
+  import { isEditFacesPanelOpen, isFaceEditMode } from '$lib/stores/face-edit.svelte';
   import { ocrManager } from '$lib/stores/ocr.svelte';
   import { boundingBoxesArray, type Faces } from '$lib/stores/people.store';
   import { SlideshowLook, SlideshowState, slideshowStore } from '$lib/stores/slideshow.store';
   import { handlePromiseError } from '$lib/utils';
   import { canCopyImageToClipboard, copyImageToClipboard } from '$lib/utils/asset-utils';
-  import { getNaturalSize, scaleToFit, type ContentMetrics } from '$lib/utils/container-utils';
+  import type { Size } from '$lib/utils/container-utils';
   import { handleError } from '$lib/utils/handle-error';
   import { getOcrBoundingBoxes } from '$lib/utils/ocr-utils';
   import { getBoundingBox } from '$lib/utils/people-utils';
@@ -25,18 +26,30 @@
   import { t } from 'svelte-i18n';
   import type { AssetCursor } from './asset-viewer.svelte';
 
-  interface Props {
+  type Props = {
     cursor: AssetCursor;
     element?: HTMLDivElement;
     sharedLink?: SharedLinkResponseDto;
-    onReady?: () => void;
+    transitionName?: string;
+    letterboxTransitionName?: string;
     onError?: () => void;
     onSwipe?: (event: SwipeCustomEvent) => void;
-  }
+  };
 
-  let { cursor, element = $bindable(), sharedLink, onReady, onError, onSwipe }: Props = $props();
+  let {
+    cursor,
+    element = $bindable(),
+    sharedLink,
+    transitionName,
+    letterboxTransitionName,
+    onError,
+    onSwipe,
+  }: Props = $props();
 
   const { slideshowState, slideshowLook } = slideshowStore;
+  const objectFit = $derived(
+    $slideshowState !== SlideshowState.None && $slideshowLook === SlideshowLook.Cover ? 'cover' : 'contain',
+  );
   const asset = $derived(cursor.current);
 
   let visibleImageReady: boolean = $state(false);
@@ -67,23 +80,12 @@
     height: containerHeight,
   });
 
-  const overlayMetrics = $derived.by((): ContentMetrics => {
+  let imageDimensions = $state<Size>({ width: 0, height: 0 });
-    if (!assetViewerManager.imgRef || !visibleImageReady) {
+  let scaledDimensions = $state<Size>({ width: 0, height: 0 });
-      return { contentWidth: 0, contentHeight: 0, offsetX: 0, offsetY: 0 };
-    }
 
-    const natural = getNaturalSize(assetViewerManager.imgRef);
+  const overlaySize = $derived(visibleImageReady ? scaledDimensions : { width: 0, height: 0 });
-    const scaled = scaleToFit(natural, { width: containerWidth, height: containerHeight });
 
-    return {
+  const ocrBoxes = $derived(ocrManager.showOverlay ? getOcrBoundingBoxes(ocrManager.data, overlaySize) : []);
-      contentWidth: scaled.width,
-      contentHeight: scaled.height,
-      offsetX: 0,
-      offsetY: 0,
-    };
-  });
-
-  const ocrBoxes = $derived(ocrManager.showOverlay ? getOcrBoundingBoxes(ocrManager.data, overlayMetrics) : []);
 
   const onCopy = async () => {
     if (!canCopyImageToClipboard() || !assetViewerManager.imgRef) {
@@ -105,12 +107,6 @@
 
   const onPlaySlideshow = () => ($slideshowState = SlideshowState.PlaySlideshow);
 
-  $effect(() => {
-    if (isFaceEditMode.value && assetViewerManager.zoom > 1) {
-      onZoom();
-    }
-  });
-
   // TODO move to action + command palette
   const onCopyShortcut = (event: KeyboardEvent) => {
     if (globalThis.getSelection()?.type === 'Range') {
@@ -151,48 +147,26 @@
     $slideshowState !== SlideshowState.None && $slideshowLook === SlideshowLook.BlurredBackground && !!asset.thumbhash,
   );
 
+  let adaptiveImage = $state<HTMLDivElement | undefined>();
+
   const faceToNameMap = $derived.by(() => {
     // eslint-disable-next-line svelte/prefer-svelte-reactivity
-    const map = new Map<Faces, string>();
+    const map = new Map<Faces, string | undefined>();
     for (const person of asset.people ?? []) {
       for (const face of person.faces ?? []) {
         map.set(face, person.name);
       }
     }
+    for (const face of asset.unassignedFaces ?? []) {
+      map.set(face, undefined);
+    }
     return map;
   });
 
+  // Array needed for indexed access in the template (faces[index])
   const faces = $derived(Array.from(faceToNameMap.keys()));
-
+  const boundingBoxes = $derived(getBoundingBox(faces, overlaySize));
-  const handleImageMouseMove = (event: MouseEvent) => {
+  const activeBoundingBoxes = $derived(boundingBoxes.filter((box) => $boundingBoxesArray.some((f) => f.id === box.id)));
-    $boundingBoxesArray = [];
-    if (!assetViewerManager.imgRef || !element || isFaceEditMode.value || ocrManager.showOverlay) {
-      return;
-    }
-
-    const natural = getNaturalSize(assetViewerManager.imgRef);
-    const scaled = scaleToFit(natural, container);
-    const { currentZoom, currentPositionX, currentPositionY } = assetViewerManager.zoomState;
-
-    const contentOffsetX = (container.width - scaled.width) / 2;
-    const contentOffsetY = (container.height - scaled.height) / 2;
-
-    const containerRect = element.getBoundingClientRect();
-    const mouseX = (event.clientX - containerRect.left - contentOffsetX * currentZoom - currentPositionX) / currentZoom;
-    const mouseY = (event.clientY - containerRect.top - contentOffsetY * currentZoom - currentPositionY) / currentZoom;
-
-    const faceBoxes = getBoundingBox(faces, overlayMetrics);
-
-    for (const [index, box] of faceBoxes.entries()) {
-      if (mouseX >= box.left && mouseX <= box.left + box.width && mouseY >= box.top && mouseY <= box.top + box.height) {
-        $boundingBoxesArray.push(faces[index]);
-      }
-    }
-  };
-
-  const handleImageMouseLeave = () => {
-    $boundingBoxesArray = [];
-  };
 </script>
 
 <AssetViewerEvents {onCopy} {onZoom} />
@@ -213,26 +187,30 @@
   bind:clientHeight={containerHeight}
   role="presentation"
   ondblclick={onZoom}
-  onmousemove={handleImageMouseMove}
+  use:zoomImageAction={{ zoomTarget: adaptiveImage }}
-  onmouseleave={handleImageMouseLeave}
-  use:zoomImageAction={{ disabled: isFaceEditMode.value || ocrManager.showOverlay }}
   {...useSwipe((event) => onSwipe?.(event))}
 >
   <AdaptiveImage
     {asset}
     {sharedLink}
     {container}
-    objectFit={$slideshowState !== SlideshowState.None && $slideshowLook === SlideshowLook.Cover ? 'cover' : 'contain'}
+    {objectFit}
     {onUrlChange}
     onImageReady={() => {
       visibleImageReady = true;
-      onReady?.();
+      eventManager.emit('ViewerOpenTransitionReady');
     }}
     onError={() => {
       onError?.();
-      onReady?.();
+      eventManager.emit('ViewerOpenTransitionReady');
     }}
     bind:imgRef={assetViewerManager.imgRef}
+    bind:imgNaturalSize={imageDimensions}
+    bind:imgScaledSize={scaledDimensions}
+    bind:ref={adaptiveImage}
+    {transitionName}
+    {letterboxTransitionName}
+    showLetterboxes={!blurredSlideshow}
   >
     {#snippet backdrop()}
       {#if blurredSlideshow}
@@ -243,20 +221,40 @@
       {/if}
     {/snippet}
     {#snippet overlays()}
-      {#each getBoundingBox($boundingBoxesArray, overlayMetrics) as boundingbox, index (boundingbox.id)}
+      {#if !isFaceEditMode.value}
+        {#each boundingBoxes as boundingbox, index (boundingbox.id)}
+          {@const face = faces[index]}
+          {@const name = faceToNameMap.get(face)}
+          {#if name !== undefined || isEditFacesPanelOpen.value}
+            <!-- svelte-ignore a11y_no_static_element_interactions -->
+            <div
+              class="absolute pointer-events-auto outline-none rounded-lg"
+              style="top: {boundingbox.top}px; left: {boundingbox.left}px; height: {boundingbox.height}px; width: {boundingbox.width}px;"
+              aria-label="{$t('person')}: {name ?? $t('unknown')}"
+              onpointerenter={() => ($boundingBoxesArray = [face])}
+              onpointerleave={() => ($boundingBoxesArray = [])}
+            ></div>
+          {/if}
+        {/each}
+      {/if}
+
+      {#each activeBoundingBoxes as boundingbox (boundingbox.id)}
+        {@const face = faces.find((f) => f.id === boundingbox.id)}
+        {@const name = face ? faceToNameMap.get(face) : undefined}
         <div
-          class="absolute border-solid border-white border-3 rounded-lg"
+          class="absolute border-solid border-white border-3 rounded-lg pointer-events-none"
           style="top: {boundingbox.top}px; left: {boundingbox.left}px; height: {boundingbox.height}px; width: {boundingbox.width}px;"
-        ></div>
+        >
-        {#if faceToNameMap.get($boundingBoxesArray[index])}
+          {#if name}
-          <div
+            <div
-            class="absolute bg-white/90 text-black px-2 py-1 rounded text-sm font-medium whitespace-nowrap pointer-events-none shadow-lg"
+              aria-hidden="true"
-            style="top: {boundingbox.top + boundingbox.height + 4}px; left: {boundingbox.left +
+              class="absolute bg-white/90 text-black px-2 py-1 rounded text-sm font-medium whitespace-nowrap shadow-lg"
-              boundingbox.width}px; transform: translateX(-100%);"
+              style="top: {boundingbox.height + 4}px; right: 0;"
-          >
+            >
-            {faceToNameMap.get($boundingBoxesArray[index])}
+              {name}
-          </div>
+            </div>
-        {/if}
+          {/if}
+        </div>
       {/each}
 
       {#each ocrBoxes as ocrBox (ocrBox.id)}
@@ -266,6 +264,6 @@
   </AdaptiveImage>
 
   {#if isFaceEditMode.value && assetViewerManager.imgRef}
-    <FaceEditor htmlElement={assetViewerManager.imgRef} {containerWidth} {containerHeight} assetId={asset.id} />
+    <FaceEditor imageSize={imageDimensions} {containerWidth} {containerHeight} assetId={asset.id} />
   {/if}
 </div>

web/src/lib/components/asset-viewer/video-native-viewer.svelte

@@ -3,6 +3,7 @@
   import VideoRemoteViewer from '$lib/components/asset-viewer/video-remote-viewer.svelte';
   import { assetViewerFadeDuration } from '$lib/constants';
   import { castManager } from '$lib/managers/cast-manager.svelte';
+  import { eventManager } from '$lib/managers/event-manager.svelte';
   import { isFaceEditMode } from '$lib/stores/face-edit.svelte';
   import {
     autoPlayVideo,
@@ -11,14 +12,17 @@
     videoViewerVolume,
   } from '$lib/stores/preferences.store';
   import { getAssetMediaUrl, getAssetPlaybackUrl } from '$lib/utils';
+  import type { Size } from '$lib/utils/container-utils';
   import { AssetMediaSize } from '@immich/sdk';
   import { LoadingSpinner } from '@immich/ui';
   import { onDestroy, onMount } from 'svelte';
   import { useSwipe, type SwipeCustomEvent } from 'svelte-gestures';
   import { fade } from 'svelte/transition';
 
-  interface Props {
+  type Props = {
+    transitionName?: string;
     assetId: string;
+    imageSize: Size;
     loopVideo: boolean;
     cacheKey: string | null;
     playOriginalVideo: boolean;
@@ -27,10 +31,12 @@
     onVideoEnded?: () => void;
     onVideoStarted?: () => void;
     onClose?: () => void;
-  }
+  };
 
   let {
+    transitionName,
     assetId,
+    imageSize,
     loopVideo,
     cacheKey,
     playOriginalVideo,
@@ -58,7 +64,6 @@
   });
 
   $effect(() => {
-    // reactive on `assetFileUrl` changes
     if (assetFileUrl) {
       hasFocused = false;
       videoPlayer?.load();
@@ -139,6 +144,7 @@
       </div>
     {:else}
       <video
+        style:view-transition-name={transitionName}
         bind:this={videoPlayer}
         loop={$loopVideoPreference && loopVideo}
         autoplay={$autoPlayVideo}
@@ -147,6 +153,7 @@
         disablePictureInPicture
         class="h-full object-contain"
         {...useSwipe(onSwipe)}
+        onloadedmetadata={() => eventManager.emit('ViewerOpenTransitionReady')}
         oncanplay={(e) => handleCanPlay(e.currentTarget)}
         onended={onVideoEnded}
         onvolumechange={(e) => ($videoViewerMuted = e.currentTarget.muted)}
@@ -173,7 +180,7 @@
       {/if}
 
       {#if isFaceEditMode.value}
-        <FaceEditor htmlElement={videoPlayer} {containerWidth} {containerHeight} {assetId} />
+        <FaceEditor {imageSize} {containerWidth} {containerHeight} {assetId} />
       {/if}
     {/if}
   </div>

web/src/lib/components/asset-viewer/video-panorama-viewer.svelte

@@ -3,13 +3,13 @@
   import type { AssetResponseDto } from '@immich/sdk';
   import { LoadingSpinner } from '@immich/ui';
   import { t } from 'svelte-i18n';
-  import { fade } from 'svelte/transition';
 
   interface Props {
+    transitionName?: string;
     asset: AssetResponseDto;
   }
 
-  const { asset }: Props = $props();
+  const { asset, transitionName }: Props = $props();
 
   const modules = Promise.all([
     import('./photo-sphere-viewer-adapter.svelte').then((module) => module.default),
@@ -19,11 +19,12 @@
   ]);
 </script>
 
-<div transition:fade={{ duration: 150 }} class="flex h-full select-none place-content-center place-items-center">
+<div class="flex h-full select-none place-content-center place-items-center">
   {#await modules}
     <LoadingSpinner />
   {:then [PhotoSphereViewer, adapter, videoPlugin]}
     <PhotoSphereViewer
+      {transitionName}
       panorama={{ source: getAssetPlaybackUrl({ id: asset.id }) }}
       originalPanorama={{ source: getAssetUrl({ asset, forceOriginal: true })! }}
       plugins={[videoPlugin]}

web/src/lib/components/asset-viewer/video-wrapper-viewer.svelte

@@ -4,7 +4,8 @@
   import { ProjectionType } from '$lib/constants';
   import type { AssetResponseDto } from '@immich/sdk';
 
-  interface Props {
+  type Props = {
+    transitionName?: string;
     asset: AssetResponseDto;
     assetId?: string;
     projectionType: string | null | undefined;
@@ -16,9 +17,10 @@
     onNextAsset?: () => void;
     onVideoEnded?: () => void;
     onVideoStarted?: () => void;
-  }
+  };
 
   let {
+    transitionName,
     asset,
     assetId,
     projectionType,
@@ -36,12 +38,14 @@
 </script>
 
 {#if projectionType === ProjectionType.EQUIRECTANGULAR}
-  <VideoPanoramaViewer {asset} />
+  <VideoPanoramaViewer {transitionName} {asset} />
 {:else}
   <VideoNativeViewer
+    {transitionName}
     {loopVideo}
     {cacheKey}
     assetId={effectiveAssetId}
+    imageSize={{ width: asset.width ?? 1, height: asset.height ?? 1 }}
     {playOriginalVideo}
     {onPreviousAsset}
     {onNextAsset}

web/src/lib/components/assets/thumbnail/image-thumbnail.svelte

@@ -16,6 +16,7 @@
     circle?: boolean;
     hidden?: boolean;
     border?: boolean;
+    highlighted?: boolean;
     hiddenIconClass?: string;
     class?: ClassValue;
     brokenAssetClass?: ClassValue;
@@ -34,6 +35,7 @@
     circle = false,
     hidden = false,
     border = false,
+    highlighted = false,
     hiddenIconClass = 'text-white',
     onComplete = undefined,
     class: imageClass = '',
@@ -83,6 +85,10 @@
   />
 {/if}
 
+{#if highlighted}
+  <span class={['absolute inset-0 pointer-events-none border-2 border-white', sharedClasses]} {style}></span>
+{/if}
+
 {#if hidden}
   <div class="absolute start-1/2 top-1/2 translate-x-[-50%] translate-y-[-50%] transform">
     <!-- TODO fix `title` type -->

web/src/lib/components/faces-page/person-side-panel.svelte

@@ -27,12 +27,12 @@
   import ImageThumbnail from '../assets/thumbnail/image-thumbnail.svelte';
   import AssignFaceSidePanel from './assign-face-side-panel.svelte';
 
-  interface Props {
+  type Props = {
     assetId: string;
     assetType: AssetTypeEnum;
     onClose: () => void;
     onRefresh: () => void;
-  }
+  };
 
   let { assetId, assetType, onClose, onRefresh }: Props = $props();
 
@@ -58,6 +58,8 @@
   let automaticRefreshTimeout: ReturnType<typeof setTimeout>;
 
   const thumbnailWidth = '90px';
+  const focusHighlightClass =
+    'group-focus-visible:outline-2 group-focus-visible:outline-offset-2 group-focus-visible:outline-immich-primary dark:group-focus-visible:outline-immich-dark-primary';
 
   async function loadPeople() {
     const timeout = setTimeout(() => (isShowLoadingPeople = true), timeBeforeShowLoadingSpinner);
@@ -226,14 +228,16 @@
       {:else}
         {#each peopleWithFaces as face, index (face.id)}
           {@const personName = face.person ? face.person?.name : $t('face_unassigned')}
+          {@const isHighlighted = $boundingBoxesArray.some((f) => f.id === face.id)}
           <div class="relative h-29 w-24">
             <div
               role="button"
               tabindex={index}
-              class="absolute start-0 top-0 h-22.5 w-22.5 cursor-default"
+              data-testid="face-thumbnail"
+              class="group absolute inset-s-0 top-0 h-22.5 w-22.5 cursor-default outline-none"
               onfocus={() => ($boundingBoxesArray = [peopleWithFaces[index]])}
-              onmouseover={() => ($boundingBoxesArray = [peopleWithFaces[index]])}
+              onpointerover={() => ($boundingBoxesArray = [peopleWithFaces[index]])}
-              onmouseleave={() => ($boundingBoxesArray = [])}
+              onpointerleave={() => ($boundingBoxesArray = [])}
             >
               <div class="relative">
                 {#if selectedPersonToCreate[face.id]}
@@ -245,6 +249,8 @@
                     title={$t('new_person')}
                     widthStyle={thumbnailWidth}
                     heightStyle={thumbnailWidth}
+                    highlighted={isHighlighted}
+                    class={focusHighlightClass}
                   />
                 {:else if selectedPersonToReassign[face.id]}
                   <ImageThumbnail
@@ -259,6 +265,8 @@
                     widthStyle={thumbnailWidth}
                     heightStyle={thumbnailWidth}
                     hidden={selectedPersonToReassign[face.id].isHidden}
+                    highlighted={isHighlighted}
+                    class={focusHighlightClass}
                   />
                 {:else if face.person}
                   <ImageThumbnail
@@ -270,6 +278,8 @@
                     widthStyle={thumbnailWidth}
                     heightStyle={thumbnailWidth}
                     hidden={face.person.isHidden}
+                    highlighted={isHighlighted}
+                    class={focusHighlightClass}
                   />
                 {:else}
                   {#await zoomImageToBase64(face, assetId, assetType, assetViewerManager.imgRef)}
@@ -281,6 +291,8 @@
                       title={$t('face_unassigned')}
                       widthStyle="90px"
                       heightStyle="90px"
+                      highlighted={isHighlighted}
+                      class={focusHighlightClass}
                     />
                   {:then data}
                     <ImageThumbnail
@@ -291,6 +303,8 @@
                       title={$t('face_unassigned')}
                       widthStyle="90px"
                       heightStyle="90px"
+                      highlighted={isHighlighted}
+                      class={focusHighlightClass}
                     />
                   {/await}
                 {/if}

web/src/lib/components/layouts/user-page-layout.svelte

@@ -6,10 +6,11 @@
   import { useActions, type ActionArray } from '$lib/actions/use-actions';
   import NavigationBar from '$lib/components/shared-components/navigation-bar/navigation-bar.svelte';
   import UserSidebar from '$lib/components/shared-components/side-bar/user-sidebar.svelte';
+  import { appManager } from '$lib/managers/app-manager.svelte';
   import type { HeaderButtonActionItem } from '$lib/types';
   import { openFileUploadDialog } from '$lib/utils/file-uploader';
   import { Button, ContextMenuButton, HStack, isMenuItemType, type MenuItemType } from '@immich/ui';
-  import type { Snippet } from 'svelte';
+  import { type Snippet } from 'svelte';
   import { t } from 'svelte-i18n';
 
   interface Props {
@@ -44,12 +45,17 @@
 
   let scrollbarClass = $derived(scrollbar ? 'immich-scrollbar' : 'scrollbar-hidden');
   let hasTitleClass = $derived(title ? 'top-16 h-[calc(100%-(--spacing(16)))]' : 'top-0 h-full');
+  let isAssetViewer = $derived(appManager.isAssetViewer);
 </script>
 
 <header>
-  {#if !hideNavbar}
+  {#if !hideNavbar && !isAssetViewer}
     <NavigationBar onUploadClick={() => openFileUploadDialog()} />
   {/if}
+
+  {#if isAssetViewer}
+    <div class="max-md:h-(--navbar-height-md) h-(--navbar-height)"></div>
+  {/if}
 </header>
 <div
   tabindex="-1"
@@ -58,13 +64,15 @@
     {hideNavbar ? 'pt-(--navbar-height)' : ''}
     {hideNavbar ? 'max-md:pt-(--navbar-height-md)' : ''}"
 >
-  {#if sidebar}
+  {#if isAssetViewer}
+    <div></div>
+  {:else if sidebar}
     {@render sidebar()}
   {:else}
     <UserSidebar />
   {/if}
 
-  <main class="relative">
+  <main class="relative w-full">
     <div class="{scrollbarClass} absolute {hasTitleClass} w-full overflow-y-auto p-2" use:useActions={use}>
       {@render children?.()}
     </div>

web/src/lib/components/memory-page/memory-photo-viewer.svelte

@@ -11,9 +11,10 @@
   interface Props {
     asset: TimelineAsset;
     onImageLoad: () => void;
+    transitionName?: string;
   }
 
-  const { asset, onImageLoad }: Props = $props();
+  const { asset, onImageLoad, transitionName }: Props = $props();
 
   let assetFileUrl: string = $state('');
   let imageLoaded: boolean = $state(false);
@@ -52,6 +53,7 @@
       src={assetFileUrl}
       alt={$getAltText(asset)}
       draggable="false"
+      style:view-transition-name={transitionName}
     />
   </div>
 {/if}

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

@@ -30,6 +30,7 @@
   import { preferences } from '$lib/stores/user.store';
   import { getAssetMediaUrl, handlePromiseError, memoryLaneTitle } from '$lib/utils';
   import { cancelMultiselect } from '$lib/utils/asset-utils';
+  import { navigateToTimeline } from '$lib/utils/transition-utils';
   import { fromISODateTimeUTC, toTimelineAsset } from '$lib/utils/timeline-util';
   import { AssetMediaSize, AssetTypeEnum, getAssetInfo } from '@immich/sdk';
   import { ActionButton, IconButton, toastManager } from '@immich/ui';
@@ -226,6 +227,20 @@
     handlePromiseError(handleAction('galleryInView', 'pause'));
   };
 
+  let memoryTransitionName = $state<string | undefined>(undefined);
+
+  const viewInTimeline = (assetId: string) => {
+    navigateToTimeline(assetId, {
+      types: ['memory-enter'],
+      prepareOldSnapshot: () => {
+        memoryTransitionName = 'hero';
+      },
+      onFinished: () => {
+        memoryTransitionName = undefined;
+      },
+    });
+  };
+
   const handleGalleryScrollsOutOfView = () => {
     galleryInView = false;
     // only call play after the first page load. When page first loads the gallery will not be visible
@@ -505,7 +520,11 @@
                   videoViewerVolume={$videoViewerVolume}
                 />
               {:else}
-                <MemoryPhotoViewer asset={current.asset} onImageLoad={resetAndPlay} />
+                <MemoryPhotoViewer
+                  asset={current.asset}
+                  onImageLoad={resetAndPlay}
+                  transitionName={memoryTransitionName}
+                />
               {/if}
             {/key}
 
@@ -560,6 +579,10 @@
                       color="secondary"
                       variant="ghost"
                       shape="round"
+                      onclick={(event: MouseEvent) => {
+                        event.preventDefault();
+                        viewInTimeline(asset.stack?.primaryAssetId ?? asset.id);
+                      }}
                     />
                   {/if}
                 {/await}

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

@@ -3,10 +3,13 @@
   import { shortcuts, type ShortcutOptions } from '$lib/actions/shortcut';
   import type { Action } from '$lib/components/asset-viewer/actions/action';
   import Thumbnail from '$lib/components/assets/thumbnail/thumbnail.svelte';
+  import { focusAsset } from '$lib/components/timeline/actions/focus-actions';
   import { AssetAction } from '$lib/constants';
   import Portal from '$lib/elements/Portal.svelte';
+  import { eventManager } from '$lib/managers/event-manager.svelte';
   import { featureFlagsManager } from '$lib/managers/feature-flags-manager.svelte';
   import type { TimelineAsset, Viewport } from '$lib/managers/timeline-manager/types';
+  import { viewTransitionManager } from '$lib/managers/ViewTransitionManager.svelte';
   import AssetDeleteConfirmModal from '$lib/modals/AssetDeleteConfirmModal.svelte';
   import ShortcutsModal from '$lib/modals/ShortcutsModal.svelte';
   import { Route } from '$lib/route';
@@ -27,9 +30,11 @@
   import { getJustifiedLayoutFromAssets } from '$lib/utils/layout-utils';
   import { navigate } from '$lib/utils/navigation';
   import { isTimelineAsset, toTimelineAsset } from '$lib/utils/timeline-util';
+  import { startViewerTransition } from '$lib/utils/transition-utils';
   import { AssetVisibility, type AssetResponseDto } from '@immich/sdk';
   import { modalManager } from '@immich/ui';
   import { debounce } from 'lodash-es';
+  import { onMount, tick } from 'svelte';
   import { t } from 'svelte-i18n';
 
   type Props = {
@@ -65,6 +70,16 @@
   }: Props = $props();
 
   let { isViewing: isViewerOpen, asset: viewingAsset } = assetViewingStore;
+
+  $effect(() => {
+    if ($isViewerOpen) {
+      document.documentElement.style.overflow = 'hidden';
+    }
+    return () => {
+      document.documentElement.style.overflow = '';
+    };
+  });
+
   const navigationAssets = $derived(viewerAssets ?? assets);
 
   const geometry = $derived(
@@ -107,6 +122,36 @@
 
   const updateSlidingWindow = () => (scrollTop = document.scrollingElement?.scrollTop ?? 0);
 
+  const scrollGalleryToAsset = async (assetId: string) => {
+    const index = assets.findIndex((asset) => asset.id === assetId);
+    if (index === -1) {
+      return;
+    }
+    const assetTopPage = geometry.getTop(index) + slidingWindowOffset;
+    const assetBottomPage = assetTopPage + geometry.getHeight(index);
+    const currentScrollTop = document.scrollingElement?.scrollTop ?? 0;
+    const visibleTop = currentScrollTop + pageHeaderOffset;
+    const visibleBottom = currentScrollTop + viewport.height;
+
+    if (assetTopPage >= visibleTop && assetBottomPage <= visibleBottom) {
+      return;
+    }
+    const distanceToAlignTop = Math.abs(assetTopPage - pageHeaderOffset - currentScrollTop);
+    const distanceToAlignBottom = Math.abs(assetBottomPage - viewport.height - currentScrollTop);
+    const newScrollTop =
+      distanceToAlignTop < distanceToAlignBottom ? assetTopPage - pageHeaderOffset : assetBottomPage - viewport.height;
+    if (document.scrollingElement) {
+      document.scrollingElement.scrollTop = newScrollTop;
+    }
+    updateSlidingWindow();
+    await tick();
+  };
+
+  const scrollToAndFocusAsset = async (assetId: string) => {
+    await scrollGalleryToAsset(assetId);
+    focusAsset(assetId);
+  };
+
   const debouncedOnIntersected = debounce(() => onIntersected?.(), 750, { maxWait: 100, leading: true });
 
   let lastIntersectedHeight = 0;
@@ -356,6 +401,63 @@
     nextAsset: getNextAsset(navigationAssets, $viewingAsset),
     previousAsset: getPreviousAsset(navigationAssets, $viewingAsset),
   });
+
+  let toViewerTransitionId = $state<string | null>(null);
+  let toGalleryTransitionId = $state<string | null>(null);
+  const transitionTargetId = $derived(toViewerTransitionId ?? toGalleryTransitionId);
+
+  const handleThumbnailClick = (asset: AssetResponseDto, currentAsset: TimelineAsset) => {
+    if (assetInteraction.selectionActive) {
+      handleSelectAssets(currentAsset);
+      return;
+    }
+
+    const doNavigate = () => void navigateToAsset(asset);
+
+    if (!viewTransitionManager.isSupported()) {
+      doNavigate();
+      return;
+    }
+
+    startViewerTransition(asset.id, doNavigate, (id) => (toViewerTransitionId = id));
+  };
+
+  const transitionToGalleryCallback = ({ id }: { id: string }) => {
+    void viewTransitionManager.startTransition({
+      types: ['timeline'],
+      prepareOldSnapshot: () => {
+        void scrollGalleryToAsset(id);
+      },
+      performUpdate: async () => {
+        eventManager.emit('ViewerCloseTransitionReady');
+        toGalleryTransitionId = id;
+        await tick();
+      },
+      onFinished: () => {
+        toGalleryTransitionId = null;
+        focusAsset(id);
+      },
+    });
+  };
+
+  if (viewTransitionManager.isSupported()) {
+    onMount(() => eventManager.on({ ViewerCloseTransition: transitionToGalleryCallback }));
+  }
+
+  const handleClose = async (asset: { id: string }) => {
+    const useTransition = viewTransitionManager.isSupported();
+    if (useTransition) {
+      const transitionReady = eventManager.untilNext('ViewerCloseTransitionReady');
+      eventManager.emit('ViewerCloseTransition', { id: asset.id });
+      await transitionReady;
+    }
+    assetViewingStore.showAssetViewer(false);
+    if (!useTransition) {
+      await tick();
+      await scrollToAndFocusAsset(asset.id);
+    }
+    handlePromiseError(navigate({ targetRoute: 'current', assetId: null }, { noScroll: true }));
+  };
 </script>
 
 <svelte:document
@@ -375,16 +477,17 @@
     {#each assets as asset, i (asset.id + '-' + i)}
       {#if isIntersecting(i)}
         {@const currentAsset = toTimelineAsset(asset)}
-        <div class="absolute" style:overflow="clip" style={getStyle(i)}>
+        {@const transitionName = transitionTargetId === asset.id ? 'hero' : undefined}
+        <div
+          class="absolute"
+          style:overflow="clip"
+          style={getStyle(i)}
+          style:view-transition-name={transitionName}
+          data-transition-name={transitionName}
+        >
           <Thumbnail
             readonly={disableAssetSelect}
-            onClick={() => {
+            onClick={() => handleThumbnailClick(asset, currentAsset)}
-              if (assetInteraction.selectionActive) {
-                handleSelectAssets(currentAsset);
-                return;
-              }
-              void navigateToAsset(asset);
-            }}
             onSelect={() => handleSelectAssets(currentAsset)}
             onMouseEvent={() => assetMouseEventHandler(currentAsset)}
             {showArchiveIcon}
@@ -416,10 +519,7 @@
         onAction={handleAction}
         onRandom={handleRandom}
         onAssetChange={updateCurrentAsset}
-        onClose={() => {
+        onClose={(asset) => handleClose(asset)}
-          assetViewingStore.showAssetViewer(false);
-          handlePromiseError(navigate({ targetRoute: 'current', assetId: null }));
-        }}
       />
     {/await}
   </Portal>

web/src/lib/components/shared-components/navigation-bar/navigation-bar.svelte

@@ -50,7 +50,11 @@
 
 <svelte:window bind:innerWidth />
 
-<nav id="dashboard-navbar" class="max-md:h-(--navbar-height-md) h-(--navbar-height) w-dvw text-sm">
+<nav
+  id="dashboard-navbar"
+  class="max-md:h-(--navbar-height-md) h-(--navbar-height) w-dvw text-sm relative z-10"
+  style:view-transition-name="exclude"
+>
   <SkipLink text={$t('skip_to_content')} />
   <div
     class="grid h-full grid-cols-[--spacing(32)_auto] items-center py-2 sidebar:grid-cols-[--spacing(64)_auto] {noBorder

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

@@ -1,20 +1,19 @@
 <script lang="ts">
   import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
+  import { filterIntersecting } from '$lib/managers/timeline-manager/utils.svelte';
   import type { ViewerAsset } from '$lib/managers/timeline-manager/viewer-asset.svelte';
-  import type { VirtualScrollManager } from '$lib/managers/VirtualScrollManager/VirtualScrollManager.svelte';
   import { uploadAssetsStore } from '$lib/stores/upload';
   import type { CommonPosition } from '$lib/utils/layout-utils';
   import type { Snippet } from 'svelte';
   import { flip } from 'svelte/animate';
   import { scale } from 'svelte/transition';
 
-  let { isUploading } = uploadAssetsStore;
-
   type Props = {
+    animationTargetAssetId?: string | null;
+    suspendTransitions?: boolean;
     viewerAssets: ViewerAsset[];
     width: number;
     height: number;
-    manager: VirtualScrollManager;
     thumbnail: Snippet<
       [
         {
@@ -26,14 +25,20 @@
     customThumbnailLayout?: Snippet<[asset: TimelineAsset]>;
   };
 
-  const { viewerAssets, width, height, manager, thumbnail, customThumbnailLayout }: Props = $props();
+  let { isUploading } = uploadAssetsStore;
 
-  const transitionDuration = $derived(manager.suspendTransitions && !$isUploading ? 0 : 150);
+  const {
+    animationTargetAssetId,
+    suspendTransitions = false,
+    viewerAssets,
+    width,
+    height,
+    thumbnail,
+    customThumbnailLayout,
+  }: Props = $props();
+
+  const transitionDuration = $derived(suspendTransitions && !$isUploading ? 0 : 150);
   const scaleDuration = $derived(transitionDuration === 0 ? 0 : transitionDuration + 100);
-
-  const filterIntersecting = <T extends { intersecting: boolean }>(intersectables: T[]) => {
-    return intersectables.filter(({ intersecting }) => intersecting);
-  };
 </script>
 
 <!-- Image grid -->
@@ -41,11 +46,14 @@
   {#each filterIntersecting(viewerAssets) as viewerAsset (viewerAsset.id)}
     {@const position = viewerAsset.position!}
     {@const asset = viewerAsset.asset!}
+    {@const transitionName = animationTargetAssetId === asset.id ? 'hero' : undefined}
 
     <!-- note: don't remove data-asset-id - its used by web e2e tests -->
     <div
       data-asset-id={asset.id}
       class="absolute"
+      data-transition-name={transitionName}
+      style:view-transition-name={transitionName}
       style:top={position.top + 'px'}
       style:inset-inline-start={position.left + 'px'}
       style:width={position.width + 'px'}

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

@@ -1,34 +1,37 @@
 <script lang="ts">
+  import { focusAsset } from '$lib/components/timeline/actions/focus-actions';
   import AssetLayout from '$lib/components/timeline/AssetLayout.svelte';
+  import { eventManager } from '$lib/managers/event-manager.svelte';
   import { DayGroup } from '$lib/managers/timeline-manager/day-group.svelte';
   import type { MonthGroup } from '$lib/managers/timeline-manager/month-group.svelte';
   import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
-  import { assetsSnapshot } from '$lib/managers/timeline-manager/utils.svelte';
+  import { assetsSnapshot, filterIntersecting } from '$lib/managers/timeline-manager/utils.svelte';
-  import type { VirtualScrollManager } from '$lib/managers/VirtualScrollManager/VirtualScrollManager.svelte';
+  import { viewTransitionManager } from '$lib/managers/ViewTransitionManager.svelte';
   import type { AssetInteraction } from '$lib/stores/asset-interaction.svelte';
   import { uploadAssetsStore } from '$lib/stores/upload';
   import type { CommonPosition } from '$lib/utils/layout-utils';
   import { fromTimelinePlainDate, getDateLocaleString } from '$lib/utils/timeline-util';
   import { Icon } from '@immich/ui';
   import { mdiCheckCircle, mdiCircleOutline } from '@mdi/js';
-  import type { Snippet } from 'svelte';
+  import { onMount, tick, type Snippet } from 'svelte';
 
   type Props = {
+    toAssetViewerTransitionId?: string | null;
     thumbnail: Snippet<[{ asset: TimelineAsset; position: CommonPosition; dayGroup: DayGroup; groupIndex: number }]>;
     customThumbnailLayout?: Snippet<[TimelineAsset]>;
     singleSelect: boolean;
     assetInteraction: AssetInteraction;
     monthGroup: MonthGroup;
-    manager: VirtualScrollManager;
     onDayGroupSelect: (dayGroup: DayGroup, assets: TimelineAsset[]) => void;
   };
+
   let {
+    toAssetViewerTransitionId,
     thumbnail: thumbnailWithGroup,
     customThumbnailLayout,
     singleSelect,
     assetInteraction,
     monthGroup,
-    manager,
     onDayGroupSelect,
   }: Props = $props();
 
@@ -37,10 +40,6 @@
 
   const transitionDuration = $derived(monthGroup.timelineManager.suspendTransitions && !$isUploading ? 0 : 150);
 
-  const filterIntersecting = <T extends { intersecting: boolean }>(intersectables: T[]) => {
-    return intersectables.filter(({ intersecting }) => intersecting);
-  };
-
   const getDayGroupFullDate = (dayGroup: DayGroup): string => {
     const { month, year } = dayGroup.monthGroup.yearMonth;
     const date = fromTimelinePlainDate({
@@ -50,6 +49,32 @@
     });
     return getDateLocaleString(date);
   };
+
+  let toTimelineTransitionAssetId = $state<string | null>(null);
+  let animationTargetAssetId = $derived(toTimelineTransitionAssetId ?? toAssetViewerTransitionId ?? null);
+
+  const transitionToTimelineCallback = ({ id }: { id: string }) => {
+    const asset = monthGroup.findAssetById({ id });
+    if (!asset) {
+      return;
+    }
+    void viewTransitionManager.startTransition({
+      types: ['timeline'],
+      performUpdate: async () => {
+        eventManager.emit('ViewerCloseTransitionReady');
+        const event = await eventManager.untilNext('TimelineLoaded');
+        toTimelineTransitionAssetId = event.id;
+        await tick();
+      },
+      onFinished: () => {
+        toTimelineTransitionAssetId = null;
+        focusAsset(asset.id);
+      },
+    });
+  };
+  if (viewTransitionManager.isSupported()) {
+    onMount(() => eventManager.on({ ViewerCloseTransition: transitionToTimelineCallback }));
+  }
 </script>
 
 {#each filterIntersecting(monthGroup.dayGroups) as dayGroup, groupIndex (dayGroup.day)}
@@ -93,7 +118,8 @@
     </div>
 
     <AssetLayout
-      {manager}
+      {animationTargetAssetId}
+      suspendTransitions={monthGroup.timelineManager.suspendTransitions}
       viewerAssets={dayGroup.viewerAssets}
       height={dayGroup.height}
       width={dayGroup.width}

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

@@ -11,6 +11,7 @@
   import { fade, fly } from 'svelte/transition';
 
   interface Props {
+    invisible: boolean;
     /** Offset from the top of the timeline (e.g., for headers) */
     timelineTopOffset?: number;
     /** Offset from the bottom of the timeline (e.g., for footers) */
@@ -39,6 +40,7 @@
   }
 
   let {
+    invisible = false,
     timelineTopOffset = 0,
     timelineBottomOffset = 0,
     height = 0,
@@ -438,7 +440,7 @@
           next = forward
             ? (focusable[(index + 1) % focusable.length] as HTMLElement)
             : (focusable[(index - 1) % focusable.length] as HTMLElement);
-          next.focus();
+          next?.focus();
         }
       }
     }
@@ -509,6 +511,7 @@
   aria-valuemin={toScrollY(0)}
   data-id="scrubber"
   class="absolute end-0 z-1 select-none hover:cursor-row-resize"
+  class:invisible
   style:padding-top={PADDING_TOP + 'px'}
   style:padding-bottom={PADDING_BOTTOM + 'px'}
   style:width

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

@@ -11,6 +11,8 @@
   import HotModuleReload from '$lib/elements/HotModuleReload.svelte';
   import Portal from '$lib/elements/Portal.svelte';
   import Skeleton from '$lib/elements/Skeleton.svelte';
+  import { startViewerTransition } from '$lib/utils/transition-utils';
+  import { eventManager } from '$lib/managers/event-manager.svelte';
   import type { DayGroup } from '$lib/managers/timeline-manager/day-group.svelte';
   import { isIntersecting } from '$lib/managers/timeline-manager/internal/intersection-support.svelte';
   import type { MonthGroup } from '$lib/managers/timeline-manager/month-group.svelte';
@@ -102,6 +104,7 @@
   // Overall scroll percentage through the entire timeline (0-1)
   let timelineScrollPercent: number = $state(0);
   let scrubberWidth = $state(0);
+  let toAssetViewerTransitionId = $state<string | null>(null);
 
   const isEmpty = $derived(timelineManager.isInitialized && timelineManager.months.length === 0);
   const maxMd = $derived(mediaQueryManager.maxMd);
@@ -209,19 +212,22 @@
         timelineManager.viewportWidth = rect.width;
       }
     }
-    const scrollTarget = $gridScrollTarget?.at;
+    const scrollTarget = getScrollTarget();
     let scrolled = false;
     if (scrollTarget) {
       scrolled = await scrollAndLoadAsset(scrollTarget);
     }
     if (!scrolled) {
-      // if the asset is not found, scroll to the top
       timelineManager.scrollTo(0);
+      if (scrollTarget) {
+        eventManager.emit('TimelineScrolledToAsset', { id: scrollTarget });
+      }
     } else if (scrollTarget) {
       await tick();
       focusAsset(scrollTarget);
+      eventManager.emit('TimelineScrolledToAsset', { id: scrollTarget });
     }
-    invisible = false;
+    invisible = isAssetViewerRoute(page) ? true : false;
   };
 
   // note: only modified once in afterNavigate()
@@ -239,10 +245,13 @@
     hasNavigatedToOrFromAssetViewer = isNavigatingToAssetViewer !== isNavigatingFromAssetViewer;
   });
 
+  const getScrollTarget = () => {
+    return $gridScrollTarget?.at ?? page.params.assetId ?? null;
+  };
   // afterNavigate is only called after navigation to a new URL, {complete} will resolve
   // after successful navigation.
   afterNavigate(({ complete }) => {
-    void complete.finally(() => {
+    void complete.finally(async () => {
       const isAssetViewerPage = isAssetViewerRoute(page);
 
       // Set initial load state only once - if initialLoadWasAssetViewer is null, then
@@ -251,8 +260,13 @@
       if (isDirectNavigation) {
         initialLoadWasAssetViewer = isAssetViewerPage && !hasNavigatedToOrFromAssetViewer;
       }
-
       void scrollAfterNavigate();
+      if (!isAssetViewerPage) {
+        const scrollTarget = getScrollTarget();
+        await tick();
+
+        eventManager.emit('TimelineLoaded', { id: scrollTarget });
+      }
     });
   });
 
@@ -260,7 +274,7 @@
   // note: don't throttle, debounch, or otherwise do this function async - it causes flicker
 
   onMount(() => {
-    if (!enableRouting) {
+    if (!enableRouting && !isAssetViewerRoute(page)) {
       invisible = false;
     }
   });
@@ -524,6 +538,33 @@
     }
   });
 
+  const defaultThumbnailClick = (
+    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 handleThumbnailClick = (asset: TimelineAsset, dayGroup: DayGroup) => {
+    if (typeof onThumbnailClick === 'function' || isSelectionMode || assetInteraction.selectionActive) {
+      if (typeof onThumbnailClick === 'function') {
+        onThumbnailClick(asset, timelineManager, dayGroup, defaultThumbnailClick);
+      } else {
+        defaultThumbnailClick(timelineManager, dayGroup.getAssets(), dayGroup.groupTitle, asset);
+      }
+      return;
+    }
+
+    const openViewer = () => void navigate({ targetRoute: 'current', assetId: asset.id });
+    startViewerTransition(asset.id, openViewer, (id) => (toAssetViewerTransitionId = id));
+  };
+
   const assetSelectHandler = (
     timelineManager: TimelineManager,
     asset: TimelineAsset,
@@ -544,19 +585,6 @@
 
     assetInteraction.selectAll = timelineManager.assetCount === assetInteraction.selectedAssets.length;
   };
-
-  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 });
-  };
 </script>
 
 <svelte:document onkeydown={onKeyDown} onkeyup={onKeyUp} />
@@ -587,6 +615,7 @@
 {#if timelineManager.months.length > 0}
   <Scrubber
     {timelineManager}
+    {invisible}
     height={timelineManager.viewportHeight}
     timelineTopOffset={timelineManager.topSectionHeight}
     timelineBottomOffset={timelineManager.bottomSectionHeight}
@@ -618,6 +647,7 @@
   id="asset-grid"
   class={['scrollbar-hidden h-full overflow-y-auto outline-none', { 'm-0': isEmpty }, { 'ms-0': !isEmpty }]}
   style:margin-inline-end={(usingMobileDevice ? 0 : scrubberWidth) + 'px'}
+  data-initialized={timelineManager.isInitialized || undefined}
   tabindex="-1"
   bind:clientHeight={timelineManager.viewportHeight}
   bind:clientWidth={timelineManager.viewportWidth}
@@ -666,11 +696,11 @@
           style:width="100%"
         >
           <Month
+            {toAssetViewerTransitionId}
             {assetInteraction}
             {customThumbnailLayout}
             {singleSelect}
             {monthGroup}
-            manager={timelineManager}
             onDayGroupSelect={handleGroupSelect}
           >
             {#snippet thumbnail({ asset, position, dayGroup, groupIndex })}
@@ -684,13 +714,7 @@
                 {asset}
                 {albumUsers}
                 {groupIndex}
-                onClick={(asset) => {
+                onClick={(asset) => handleThumbnailClick(asset, dayGroup)}
-                  if (typeof onThumbnailClick === 'function') {
-                    onThumbnailClick(asset, timelineManager, dayGroup, _onClick);
-                  } else {
-                    _onClick(timelineManager, dayGroup.getAssets(), dayGroup.groupTitle, asset);
-                  }
-                }}
                 onSelect={() => {
                   if (isSelectionMode || assetInteraction.selectionActive) {
                     assetSelectHandler(timelineManager, asset, dayGroup.getAssets(), dayGroup.groupTitle);

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

@@ -4,6 +4,8 @@
   import { AssetAction } from '$lib/constants';
   import { assetCacheManager } from '$lib/managers/AssetCacheManager.svelte';
   import { authManager } from '$lib/managers/auth-manager.svelte';
+  import { eventManager } from '$lib/managers/event-manager.svelte';
+  import { viewTransitionManager } from '$lib/managers/ViewTransitionManager.svelte';
   import { TimelineManager } from '$lib/managers/timeline-manager/timeline-manager.svelte';
   import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
   import { assetViewingStore } from '$lib/stores/asset-viewing.store';
@@ -98,6 +100,12 @@
   };
 
   const handleClose = async (asset: { id: string }) => {
+    if (viewTransitionManager.isSupported()) {
+      const transitionReady = eventManager.untilNext('ViewerCloseTransitionReady');
+      eventManager.emit('ViewerCloseTransition', { id: asset.id });
+      await transitionReady;
+    }
+
     invisible = true;
     $gridScrollTarget = { at: asset.id };
     await navigate({ targetRoute: 'current', assetId: null, assetGridRouteSearchParams: $gridScrollTarget });

web/src/lib/managers/ViewTransitionManager.svelte.spec.ts

@@ -0,0 +1,363 @@
+import { ViewTransitionManager } from '$lib/managers/ViewTransitionManager.svelte';
+
+describe('ViewTransitionManager', () => {
+  let manager: ViewTransitionManager;
+
+  beforeEach(() => {
+    manager = new ViewTransitionManager();
+  });
+
+  afterEach(() => {
+    delete (document as Partial<typeof document> & { startViewTransition?: unknown }).startViewTransition;
+  });
+
+  describe('when View Transition API is not supported', () => {
+    it('should still call performUpdate', async () => {
+      const performUpdate = vi.fn().mockResolvedValue(undefined);
+
+      await manager.startTransition({ performUpdate });
+
+      expect(performUpdate).toHaveBeenCalledOnce();
+    });
+
+    it('should call onFinished after performUpdate', async () => {
+      const callOrder: string[] = [];
+      const performUpdate = vi.fn().mockImplementation(() => {
+        callOrder.push('performUpdate');
+      });
+      const onFinished = vi.fn().mockImplementation(() => {
+        callOrder.push('onFinished');
+      });
+
+      await manager.startTransition({ performUpdate, onFinished });
+
+      expect(onFinished).toHaveBeenCalledOnce();
+      expect(callOrder).toEqual(['performUpdate', 'onFinished']);
+    });
+
+    it('should not call prepareOldSnapshot or prepareNewSnapshot', async () => {
+      const prepareOldSnapshot = vi.fn();
+      const prepareNewSnapshot = vi.fn();
+      const performUpdate = vi.fn().mockResolvedValue(undefined);
+
+      await manager.startTransition({ performUpdate, prepareOldSnapshot, prepareNewSnapshot });
+
+      expect(prepareOldSnapshot).not.toHaveBeenCalled();
+      expect(prepareNewSnapshot).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('when a transition is already active', () => {
+    it('should skip the second transition', async () => {
+      let resolveFinished!: () => void;
+      const finished = new Promise<void>((resolve) => {
+        resolveFinished = resolve;
+      });
+      let resolveUpdate!: () => void;
+      const updateCallbackDone = new Promise<void>((resolve) => {
+        resolveUpdate = resolve;
+      });
+
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn().mockImplementation((arg: unknown) => {
+        const updateFn = typeof arg === 'function' ? arg : (arg as { update: () => Promise<void> }).update;
+        void updateFn();
+        return { updateCallbackDone, finished, ready: Promise.resolve(), skipTransition: vi.fn() };
+      });
+
+      const secondPerformUpdate = vi.fn().mockResolvedValue(undefined);
+
+      // Start first — it will be blocked on updateCallbackDone
+      const firstPromise = manager.startTransition({
+        performUpdate: async () => {},
+      });
+
+      // Flush microtasks so the first transition reaches the startViewTransition call
+      await new Promise<void>((r) => queueMicrotask(r));
+
+      // While first is active, try a second — should be skipped
+      await manager.startTransition({ performUpdate: secondPerformUpdate });
+      expect(secondPerformUpdate).not.toHaveBeenCalled();
+
+      // Clean up
+      resolveUpdate();
+      resolveFinished();
+      await firstPromise;
+    });
+  });
+
+  describe('skipTransitions', () => {
+    it('should return false when no transition is active', () => {
+      expect(manager.skipTransitions()).toBe(false);
+    });
+
+    it('should call skipTransition on the active transition and return true', async () => {
+      let resolveFinished!: () => void;
+      const finished = new Promise<void>((resolve) => {
+        resolveFinished = resolve;
+      });
+      let resolveUpdate!: () => void;
+      const updateCallbackDone = new Promise<void>((resolve) => {
+        resolveUpdate = resolve;
+      });
+      const skipTransition = vi.fn();
+
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn().mockImplementation((arg: unknown) => {
+        const updateFn = typeof arg === 'function' ? arg : (arg as { update: () => Promise<void> }).update;
+        void updateFn();
+        return { updateCallbackDone, finished, ready: Promise.resolve(), skipTransition };
+      });
+
+      const promise = manager.startTransition({ performUpdate: async () => {} });
+      await new Promise<void>((r) => queueMicrotask(r));
+
+      const skipped = manager.skipTransitions();
+      expect(skipped).toBe(true);
+      expect(skipTransition).toHaveBeenCalledOnce();
+
+      resolveUpdate();
+      resolveFinished();
+      await promise;
+    });
+
+    it('should allow a new transition after skipping', async () => {
+      let resolveFinished!: () => void;
+      const finished = new Promise<void>((resolve) => {
+        resolveFinished = resolve;
+      });
+      let resolveUpdate!: () => void;
+      const updateCallbackDone = new Promise<void>((resolve) => {
+        resolveUpdate = resolve;
+      });
+
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn().mockImplementation((arg: unknown) => {
+        const updateFn = typeof arg === 'function' ? arg : (arg as { update: () => Promise<void> }).update;
+        void updateFn();
+        return { updateCallbackDone, finished, ready: Promise.resolve(), skipTransition: vi.fn() };
+      });
+
+      const promise = manager.startTransition({ performUpdate: async () => {} });
+      await new Promise<void>((r) => queueMicrotask(r));
+
+      manager.skipTransitions();
+      resolveUpdate();
+      resolveFinished();
+      await promise;
+
+      // Now start a second transition — it should NOT be skipped
+      const secondUpdate = vi.fn().mockResolvedValue(undefined);
+      const secondFinished = Promise.resolve();
+      const secondUpdateDone = Promise.resolve();
+
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn().mockImplementation((arg: unknown) => {
+        const updateFn = typeof arg === 'function' ? arg : (arg as { update: () => Promise<void> }).update;
+        void updateFn();
+        return {
+          updateCallbackDone: secondUpdateDone,
+          finished: secondFinished,
+          ready: Promise.resolve(),
+          skipTransition: vi.fn(),
+        };
+      });
+
+      await manager.startTransition({ performUpdate: secondUpdate });
+      expect(secondUpdate).toHaveBeenCalledOnce();
+    });
+  });
+
+  describe('error handling', () => {
+    it('should propagate error from performUpdate when API is not supported', async () => {
+      const error = new Error('update failed');
+      const performUpdate = vi.fn().mockRejectedValue(error);
+
+      await expect(manager.startTransition({ performUpdate })).rejects.toThrow('update failed');
+    });
+
+    it('should clean up activeViewTransition when performUpdate throws (API supported)', async () => {
+      const error = new Error('update failed');
+      let resolveFinished!: () => void;
+      const finished = new Promise<void>((resolve) => {
+        resolveFinished = resolve;
+      });
+
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn().mockImplementation((arg: unknown) => {
+        const updateFn = typeof arg === 'function' ? arg : (arg as { update: () => Promise<void> }).update;
+        const updateCallbackDone = updateFn();
+        return { updateCallbackDone, finished, ready: Promise.resolve(), skipTransition: vi.fn() };
+      });
+
+      await expect(manager.startTransition({ performUpdate: () => Promise.reject(error) })).rejects.toThrow(
+        'update failed',
+      );
+
+      // Simulate transition finishing after error
+      resolveFinished();
+      await new Promise<void>((r) => queueMicrotask(r));
+
+      // Manager should accept new transitions after cleanup
+      const secondUpdate = vi.fn().mockResolvedValue(undefined);
+      const secondFinished = Promise.resolve();
+      const secondUpdateDone = Promise.resolve();
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn().mockImplementation((arg: unknown) => {
+        const updateFn = typeof arg === 'function' ? arg : (arg as { update: () => Promise<void> }).update;
+        void updateFn();
+        return {
+          updateCallbackDone: secondUpdateDone,
+          finished: secondFinished,
+          ready: Promise.resolve(),
+          skipTransition: vi.fn(),
+        };
+      });
+
+      await manager.startTransition({ performUpdate: secondUpdate });
+      expect(secondUpdate).toHaveBeenCalledOnce();
+    });
+  });
+
+  describe('fallback path', () => {
+    it('should fall back to function argument when object argument throws', async () => {
+      const performUpdate = vi.fn().mockResolvedValue(undefined);
+      const prepareNewSnapshot = vi.fn();
+      const finished = Promise.resolve();
+      const updateCallbackDone = Promise.resolve();
+
+      let callCount = 0;
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn().mockImplementation((arg: unknown) => {
+        callCount++;
+        if (callCount === 1 && typeof arg !== 'function') {
+          throw new TypeError('object form not supported');
+        }
+        const updateFn = typeof arg === 'function' ? arg : (arg as { update: () => Promise<void> }).update;
+        void updateFn();
+        return { updateCallbackDone, finished, ready: Promise.resolve(), skipTransition: vi.fn() };
+      });
+
+      await manager.startTransition({ performUpdate, prepareNewSnapshot, types: ['test'] });
+
+      expect(performUpdate).toHaveBeenCalledOnce();
+      expect(prepareNewSnapshot).toHaveBeenCalledOnce();
+      // eslint-disable-next-line tscompat/tscompat
+      expect(document.startViewTransition).toHaveBeenCalledTimes(2);
+    });
+  });
+
+  describe('abort signal', () => {
+    it('should pass an AbortSignal to performUpdate', async () => {
+      const performUpdate = vi.fn().mockResolvedValue(undefined);
+
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn().mockImplementation((arg: unknown) => {
+        const updateFn = typeof arg === 'function' ? arg : (arg as { update: () => Promise<void> }).update;
+        void updateFn();
+        return {
+          updateCallbackDone: Promise.resolve(),
+          finished: Promise.resolve(),
+          ready: Promise.resolve(),
+          skipTransition: vi.fn(),
+        };
+      });
+
+      await manager.startTransition({ performUpdate });
+
+      expect(performUpdate).toHaveBeenCalledWith(expect.any(AbortSignal));
+    });
+
+    it('should abort the signal when transition.ready rejects', async () => {
+      let capturedSignal: AbortSignal | undefined;
+      let resolveUpdate!: () => void;
+      const updateCallbackDone = new Promise<void>((resolve) => {
+        resolveUpdate = resolve;
+      });
+
+      const readyError = new Error('Transition was aborted because of timeout in DOM update');
+
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn().mockImplementation((arg: unknown) => {
+        const updateFn = typeof arg === 'function' ? arg : (arg as { update: () => Promise<void> }).update;
+        void updateFn();
+        return {
+          updateCallbackDone,
+          finished: Promise.reject(readyError),
+          ready: Promise.reject(readyError),
+          skipTransition: vi.fn(),
+        };
+      });
+
+      const performUpdate = vi.fn().mockImplementation((signal: AbortSignal) => {
+        capturedSignal = signal;
+        return new Promise<void>((resolve) => {
+          signal.addEventListener('abort', () => resolve(), { once: true });
+        });
+      });
+
+      const promise = manager.startTransition({ performUpdate });
+
+      // Flush microtasks so ready rejection fires and aborts the signal
+      await new Promise<void>((r) => queueMicrotask(r));
+      await new Promise<void>((r) => queueMicrotask(r));
+
+      expect(capturedSignal?.aborted).toBe(true);
+
+      resolveUpdate();
+      await promise;
+    });
+
+    it('should not abort the signal when transition completes normally', async () => {
+      let capturedSignal: AbortSignal | undefined;
+
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn().mockImplementation((arg: unknown) => {
+        const updateFn = typeof arg === 'function' ? arg : (arg as { update: () => Promise<void> }).update;
+        void updateFn();
+        return {
+          updateCallbackDone: Promise.resolve(),
+          finished: Promise.resolve(),
+          ready: Promise.resolve(),
+          skipTransition: vi.fn(),
+        };
+      });
+
+      await manager.startTransition({
+        performUpdate: (signal) => {
+          capturedSignal = signal;
+          return Promise.resolve();
+        },
+      });
+
+      expect(capturedSignal?.aborted).toBe(false);
+    });
+
+    it('should pass a non-aborted signal in the unsupported fallback path', async () => {
+      let capturedSignal: AbortSignal | undefined;
+
+      await manager.startTransition({
+        performUpdate: (signal) => {
+          capturedSignal = signal;
+          return Promise.resolve();
+        },
+      });
+
+      expect(capturedSignal).toBeInstanceOf(AbortSignal);
+      expect(capturedSignal?.aborted).toBe(false);
+    });
+  });
+
+  describe('isSupported', () => {
+    it('should return false when startViewTransition is not in document', () => {
+      expect(manager.isSupported()).toBe(false);
+    });
+
+    it('should return true when startViewTransition is in document', () => {
+      // eslint-disable-next-line tscompat/tscompat
+      document.startViewTransition = vi.fn();
+
+      expect(manager.isSupported()).toBe(true);
+    });
+  });
+});

web/src/lib/managers/ViewTransitionManager.svelte.ts

@@ -0,0 +1,94 @@
+import { tick } from 'svelte';
+
+interface TransitionRequest {
+  types?: string[];
+  prepareOldSnapshot?: () => void;
+  performUpdate: (signal: AbortSignal) => Promise<void>;
+  prepareNewSnapshot?: () => void;
+  onFinished?: () => void;
+}
+
+export class ViewTransitionManager {
+  #activeViewTransition = $state<ViewTransition | null>(null);
+
+  get activeViewTransition() {
+    return this.#activeViewTransition;
+  }
+
+  isSupported() {
+    return 'startViewTransition' in document;
+  }
+
+  skipTransitions() {
+    const skipped = !!this.#activeViewTransition;
+    this.#activeViewTransition?.skipTransition();
+    this.#activeViewTransition = null;
+    return skipped;
+  }
+
+  async startTransition({
+    types,
+    prepareOldSnapshot,
+    performUpdate,
+    prepareNewSnapshot,
+    onFinished,
+  }: TransitionRequest) {
+    if (this.#activeViewTransition) {
+      return;
+    }
+
+    if (!this.isSupported()) {
+      await performUpdate(AbortSignal.timeout(10_000));
+      onFinished?.();
+      return;
+    }
+
+    prepareOldSnapshot?.();
+    await tick();
+
+    const abortController = new AbortController();
+    let transition: ViewTransition;
+    try {
+      // eslint-disable-next-line tscompat/tscompat
+      transition = document.startViewTransition({
+        update: async () => {
+          await performUpdate(abortController.signal);
+          prepareNewSnapshot?.();
+          await tick();
+        },
+        types,
+      });
+    } catch {
+      // eslint-disable-next-line tscompat/tscompat
+      transition = document.startViewTransition(async () => {
+        await performUpdate(abortController.signal);
+        prepareNewSnapshot?.();
+        await tick();
+      });
+    }
+
+    this.#activeViewTransition = transition;
+
+    // eslint-disable-next-line tscompat/tscompat
+    void transition.ready.catch((error: unknown) => {
+      abortController.abort(error);
+    });
+
+    // Let animation run in the background — don't block the caller.
+    // This allows skipTransitions() to abort mid-animation for rapid navigation.
+    // eslint-disable-next-line tscompat/tscompat
+    void transition.finished
+      .catch(() => {})
+      .finally(() => {
+        this.#activeViewTransition = null;
+        onFinished?.();
+      });
+
+    // Wait only until the DOM update completes (both snapshots captured),
+    // not for the animation to finish.
+    // eslint-disable-next-line tscompat/tscompat
+    await transition.updateCallbackDone;
+  }
+}
+
+export const viewTransitionManager = new ViewTransitionManager();

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

@@ -0,0 +1,5 @@
+class AppManager {
+  isAssetViewer = $state(false);
+}
+
+export const appManager = new AppManager();

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

@@ -89,6 +89,15 @@ export type Events = {
   ReleaseEvent: [ReleaseEvent];
 
   WebsocketConnect: [];
+
+  TimelineLoaded: [{ id: string | null }];
+  TimelineScrolledToAsset: [{ id: string }];
+
+  ViewerAfterNavigate: [];
+  ViewerCloseTransition: [{ id: string }];
+  ViewerCloseTransitionReady: [];
+  ViewerOpenTransition: [];
+  ViewerOpenTransitionReady: [];
 };
 
 export const eventManager = new BaseEventManager<Events>();

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

@@ -2,3 +2,11 @@ import type { TimelineAsset } from './types';
 
 export const assetSnapshot = (asset: TimelineAsset): TimelineAsset => $state.snapshot(asset);
 export const assetsSnapshot = (assets: TimelineAsset[]) => assets.map((asset) => $state.snapshot(asset));
+
+export function* filterIntersecting<T extends { intersecting: boolean }>(items: T[]) {
+  for (const item of items) {
+    if (item.intersecting) {
+      yield item;
+    }
+  }
+}

web/src/lib/stores/asset-viewing.store.ts

@@ -5,6 +5,7 @@ import { readonly, writable } from 'svelte/store';
 
 function createAssetViewingStore() {
   const viewingAssetStoreState = writable<AssetResponseDto>();
+  const invisible = writable<boolean>(false);
   const viewState = writable<boolean>(false);
   const gridScrollTarget = writable<AssetGridRouteSearchParams | null | undefined>();
 
@@ -30,6 +31,7 @@ function createAssetViewingStore() {
     setAsset,
     setAssetId,
     showAssetViewer,
+    invisible,
   };
 }
 

web/src/lib/stores/face-edit.svelte.ts

@@ -1 +1,2 @@
 export const isFaceEditMode = $state({ value: false });
+export const isEditFacesPanelOpen = $state({ value: false });

web/src/lib/utils/base-event-manager.svelte.ts

@@ -43,6 +43,50 @@ export class BaseEventManager<Events extends EventsBase> {
     };
   }
 
+  once<T extends keyof Events>(event: T, callback: EventCallback<Events, T>) {
+    const unsubscribe = this.#onEvent(event, (...args: Events[T]) => {
+      unsubscribe();
+      return callback(...args);
+    });
+    return unsubscribe;
+  }
+
+  untilNext<T extends keyof Events>(
+    event: T,
+    { timeoutMs = 10_000, signal }: { timeoutMs?: number; signal?: AbortSignal } = {},
+  ): Promise<Events[T] extends [] ? void : Events[T][0]> {
+    type Result = Events[T] extends [] ? void : Events[T][0];
+    return new Promise<Result>((resolve, reject) => {
+      let settled = false;
+      const settle = () => {
+        if (settled) {
+          return false;
+        }
+        settled = true;
+        unsubscribe();
+        clearTimeout(timer);
+        signal?.removeEventListener('abort', onAbort);
+        return true;
+      };
+      const unsubscribe = this.once(event, (...args: Events[T]) => {
+        if (settle()) {
+          resolve(args[0] as Result);
+        }
+      });
+      const timer = setTimeout(() => {
+        if (settle()) {
+          reject(new Error(`untilNext('${String(event)}') timed out after ${timeoutMs}ms`));
+        }
+      }, timeoutMs);
+      const onAbort = () => {
+        if (settle()) {
+          resolve(undefined as Result);
+        }
+      };
+      signal?.addEventListener('abort', onAbort, { once: true });
+    });
+  }
+
   emit<T extends keyof Events>(event: T, ...params: Events[T]) {
     const listeners = this.getListeners(event);
     for (const listener of listeners) {

web/src/lib/utils/container-utils.spec.ts

@@ -1,4 +1,14 @@
-import { getContentMetrics, getNaturalSize, scaleToFit } from '$lib/utils/container-utils';
+import {
+  computeContentMetrics,
+  getContentMetrics,
+  getNaturalSize,
+  mapContentRectToNatural,
+  mapContentToNatural,
+  mapNormalizedRectToContent,
+  mapNormalizedToContent,
+  scaleToCover,
+  scaleToFit,
+} from '$lib/utils/container-utils';
 
 const mockImage = (props: {
   naturalWidth: number;
@@ -92,3 +102,178 @@ describe('getNaturalSize', () => {
     expect(getNaturalSize(video)).toEqual({ width: 1920, height: 1080 });
   });
 });
+
+describe('scaleToCover', () => {
+  it('should scale up to cover container when image is smaller', () => {
+    expect(scaleToCover({ width: 400, height: 300 }, { width: 800, height: 600 })).toEqual({
+      width: 800,
+      height: 600,
+    });
+  });
+
+  it('should use height scale when image is wider than container', () => {
+    expect(scaleToCover({ width: 2000, height: 1000 }, { width: 800, height: 600 })).toEqual({
+      width: 1200,
+      height: 600,
+    });
+  });
+
+  it('should use width scale when image is taller than container', () => {
+    expect(scaleToCover({ width: 1000, height: 2000 }, { width: 800, height: 600 })).toEqual({
+      width: 800,
+      height: 1600,
+    });
+  });
+});
+
+describe('computeContentMetrics', () => {
+  it('should compute metrics with scaleToFit by default', () => {
+    expect(computeContentMetrics({ width: 2000, height: 1000 }, { width: 800, height: 600 })).toEqual({
+      contentWidth: 800,
+      contentHeight: 400,
+      offsetX: 0,
+      offsetY: 100,
+    });
+  });
+
+  it('should accept scaleToCover as scale function', () => {
+    expect(computeContentMetrics({ width: 2000, height: 1000 }, { width: 800, height: 600 }, scaleToCover)).toEqual({
+      contentWidth: 1200,
+      contentHeight: 600,
+      offsetX: -200,
+      offsetY: 0,
+    });
+  });
+
+  it('should compute zero offsets when aspect ratios match', () => {
+    expect(computeContentMetrics({ width: 1600, height: 900 }, { width: 800, height: 450 })).toEqual({
+      contentWidth: 800,
+      contentHeight: 450,
+      offsetX: 0,
+      offsetY: 0,
+    });
+  });
+});
+
+// Coordinate space glossary:
+//
+// "Normalized" coordinates: values in the 0–1 range, where (0,0) is the top-left
+// of the image and (1,1) is the bottom-right. Resolution-independent.
+//
+// "Content" coordinates: pixel positions within the container, after the image
+// has been scaled (scaleToFit/scaleToCover) and offset (centered). This is what
+// CSS and DOM layout use for positioning overlays like face boxes and OCR text.
+//
+// "Natural" coordinates: pixel positions in the original image file at its full
+// resolution (e.g. 4000×3000). Used when cropping or drawing on the source image.
+//
+// "Metadata pixel space": the coordinate system used by face detection / OCR
+// models, where positions are in pixels relative to the image dimensions stored
+// in metadata (face.imageWidth/imageHeight). These may differ from the natural
+// dimensions if the image was resized. To convert to normalized, divide by
+// the metadata dimensions (e.g. face.boundingBoxX1 / face.imageWidth).
+
+describe('mapNormalizedToContent', () => {
+  const metrics = { contentWidth: 800, contentHeight: 400, offsetX: 0, offsetY: 100 };
+
+  it('should map top-left corner', () => {
+    expect(mapNormalizedToContent({ x: 0, y: 0 }, metrics)).toEqual({ x: 0, y: 100 });
+  });
+
+  it('should map bottom-right corner', () => {
+    expect(mapNormalizedToContent({ x: 1, y: 1 }, metrics)).toEqual({ x: 800, y: 500 });
+  });
+
+  it('should map center point', () => {
+    expect(mapNormalizedToContent({ x: 0.5, y: 0.5 }, metrics)).toEqual({ x: 400, y: 300 });
+  });
+
+  it('should apply offsets correctly for letterboxed content', () => {
+    const letterboxed = { contentWidth: 300, contentHeight: 600, offsetX: 250, offsetY: 0 };
+    expect(mapNormalizedToContent({ x: 0, y: 0 }, letterboxed)).toEqual({ x: 250, y: 0 });
+    expect(mapNormalizedToContent({ x: 1, y: 1 }, letterboxed)).toEqual({ x: 550, y: 600 });
+  });
+
+  it('should accept Size (zero offsets)', () => {
+    const size = { width: 800, height: 400 };
+    expect(mapNormalizedToContent({ x: 0, y: 0 }, size)).toEqual({ x: 0, y: 0 });
+    expect(mapNormalizedToContent({ x: 1, y: 1 }, size)).toEqual({ x: 800, y: 400 });
+    expect(mapNormalizedToContent({ x: 0.5, y: 0.5 }, size)).toEqual({ x: 400, y: 200 });
+  });
+});
+
+describe('mapContentToNatural', () => {
+  const metrics = { contentWidth: 800, contentHeight: 400, offsetX: 0, offsetY: 100 };
+  const natural = { width: 4000, height: 2000 };
+
+  it('should map content origin to natural origin', () => {
+    expect(mapContentToNatural({ x: 0, y: 100 }, metrics, natural)).toEqual({ x: 0, y: 0 });
+  });
+
+  it('should map content bottom-right to natural bottom-right', () => {
+    expect(mapContentToNatural({ x: 800, y: 500 }, metrics, natural)).toEqual({ x: 4000, y: 2000 });
+  });
+
+  it('should map content center to natural center', () => {
+    expect(mapContentToNatural({ x: 400, y: 300 }, metrics, natural)).toEqual({ x: 2000, y: 1000 });
+  });
+
+  it('should be the inverse of mapNormalizedToContent', () => {
+    const normalized = { x: 0.3, y: 0.7 };
+    const contentPoint = mapNormalizedToContent(normalized, metrics);
+    const naturalPoint = mapContentToNatural(contentPoint, metrics, natural);
+    expect(naturalPoint.x).toBeCloseTo(normalized.x * natural.width);
+    expect(naturalPoint.y).toBeCloseTo(normalized.y * natural.height);
+  });
+});
+
+describe('mapNormalizedRectToContent', () => {
+  const metrics = { contentWidth: 800, contentHeight: 400, offsetX: 0, offsetY: 100 };
+
+  it('should map a normalized rect to content pixel coordinates', () => {
+    const rect = mapNormalizedRectToContent({ x: 0.25, y: 0.25 }, { x: 0.75, y: 0.75 }, metrics);
+    expect(rect).toEqual({ left: 200, top: 200, width: 400, height: 200 });
+  });
+
+  it('should map full image rect', () => {
+    const rect = mapNormalizedRectToContent({ x: 0, y: 0 }, { x: 1, y: 1 }, metrics);
+    expect(rect).toEqual({ left: 0, top: 100, width: 800, height: 400 });
+  });
+
+  it('should handle letterboxed content with horizontal offsets', () => {
+    const letterboxed = { contentWidth: 300, contentHeight: 600, offsetX: 250, offsetY: 0 };
+    const rect = mapNormalizedRectToContent({ x: 0, y: 0 }, { x: 1, y: 1 }, letterboxed);
+    expect(rect).toEqual({ left: 250, top: 0, width: 300, height: 600 });
+  });
+
+  it('should accept Size (zero offsets)', () => {
+    const size = { width: 800, height: 400 };
+    const rect = mapNormalizedRectToContent({ x: 0.25, y: 0.25 }, { x: 0.75, y: 0.75 }, size);
+    expect(rect).toEqual({ left: 200, top: 100, width: 400, height: 200 });
+  });
+});
+
+describe('mapContentRectToNatural', () => {
+  const metrics = { contentWidth: 800, contentHeight: 400, offsetX: 0, offsetY: 100 };
+  const natural = { width: 4000, height: 2000 };
+
+  it('should map a content rect to natural image coordinates', () => {
+    const rect = mapContentRectToNatural({ left: 200, top: 200, width: 400, height: 200 }, metrics, natural);
+    expect(rect).toEqual({ left: 1000, top: 500, width: 2000, height: 1000 });
+  });
+
+  it('should map full content rect to full natural dimensions', () => {
+    const rect = mapContentRectToNatural({ left: 0, top: 100, width: 800, height: 400 }, metrics, natural);
+    expect(rect).toEqual({ left: 0, top: 0, width: 4000, height: 2000 });
+  });
+
+  it('should be the inverse of mapNormalizedRectToContent', () => {
+    const normalized = { topLeft: { x: 0.2, y: 0.3 }, bottomRight: { x: 0.8, y: 0.9 } };
+    const contentRect = mapNormalizedRectToContent(normalized.topLeft, normalized.bottomRight, metrics);
+    const naturalRect = mapContentRectToNatural(contentRect, metrics, natural);
+    expect(naturalRect.left).toBeCloseTo(normalized.topLeft.x * natural.width);
+    expect(naturalRect.top).toBeCloseTo(normalized.topLeft.y * natural.height);
+    expect(naturalRect.width).toBeCloseTo((normalized.bottomRight.x - normalized.topLeft.x) * natural.width);
+    expect(naturalRect.height).toBeCloseTo((normalized.bottomRight.y - normalized.topLeft.y) * natural.height);
+  });
+});

web/src/lib/utils/container-utils.ts

@@ -1,14 +1,35 @@
-export interface ContentMetrics {
+// Coordinate spaces used throughout the viewer:
+//
+// "Normalized": 0–1 range, (0,0) = top-left, (1,1) = bottom-right. Resolution-independent.
+//   Example: OCR coordinates, or face coords after dividing by metadata dimensions.
+//
+// "Content": pixel position within the container after scaling (scaleToFit/scaleToCover)
+//   and centering. Used for DOM overlay positioning (face boxes, OCR text).
+//
+// "Natural": pixel position in the original full-resolution image file (e.g. 4000×3000).
+//   Used when cropping or drawing on the source image.
+//
+// "Metadata pixel space": coordinates from face detection / OCR models, in pixels relative
+//   to face.imageWidth/imageHeight. Divide by those dimensions to get normalized coords.
+
+export type Point = {
+  x: number;
+  y: number;
+};
+
+export type Size = {
+  width: number;
+  height: number;
+};
+
+export type ContentMetrics = {
   contentWidth: number;
   contentHeight: number;
   offsetX: number;
   offsetY: number;
-}
+};
 
-export const scaleToCover = (
+export const scaleToCover = (dimensions: Size, container: Size): Size => {
-  dimensions: { width: number; height: number },
-  container: { width: number; height: number },
-): { width: number; height: number } => {
   const scaleX = container.width / dimensions.width;
   const scaleY = container.height / dimensions.height;
   const scale = Math.max(scaleX, scaleY);
@@ -18,10 +39,7 @@ export const scaleToCover = (
   };
 };
 
-export const scaleToFit = (
+export const scaleToFit = (dimensions: Size, container: Size): Size => {
-  dimensions: { width: number; height: number },
-  container: { width: number; height: number },
-): { width: number; height: number } => {
   const scaleX = container.width / dimensions.width;
   const scaleY = container.height / dimensions.height;
   const scale = Math.min(scaleX, scaleY);
@@ -31,28 +49,93 @@ export const scaleToFit = (
   };
 };
 
-const getElementSize = (element: HTMLImageElement | HTMLVideoElement): { width: number; height: number } => {
+const getElementSize = (element: HTMLImageElement | HTMLVideoElement): Size => {
   if (element instanceof HTMLVideoElement) {
     return { width: element.clientWidth, height: element.clientHeight };
   }
   return { width: element.width, height: element.height };
 };
 
-export const getNaturalSize = (element: HTMLImageElement | HTMLVideoElement): { width: number; height: number } => {
+export const getNaturalSize = (element: HTMLImageElement | HTMLVideoElement): Size => {
   if (element instanceof HTMLVideoElement) {
     return { width: element.videoWidth, height: element.videoHeight };
   }
   return { width: element.naturalWidth, height: element.naturalHeight };
 };
 
-export const getContentMetrics = (element: HTMLImageElement | HTMLVideoElement): ContentMetrics => {
+export function computeContentMetrics(
-  const natural = getNaturalSize(element);
+  imageSize: Size,
-  const client = getElementSize(element);
+  containerSize: Size,
-  const { width: contentWidth, height: contentHeight } = scaleToFit(natural, client);
+  scaleFn: (dimensions: Size, container: Size) => Size = scaleToFit,
+) {
+  const { width: contentWidth, height: contentHeight } = scaleFn(imageSize, containerSize);
   return {
     contentWidth,
     contentHeight,
-    offsetX: (client.width - contentWidth) / 2,
+    offsetX: (containerSize.width - contentWidth) / 2,
-    offsetY: (client.height - contentHeight) / 2,
+    offsetY: (containerSize.height - contentHeight) / 2,
   };
+}
+
+export const getContentMetrics = (element: HTMLImageElement | HTMLVideoElement): ContentMetrics => {
+  const natural = getNaturalSize(element);
+  const client = getElementSize(element);
+  return computeContentMetrics(natural, client);
 };
+
+export function mapNormalizedToContent(point: Point, sizeOrMetrics: Size | ContentMetrics): Point {
+  if ('contentWidth' in sizeOrMetrics) {
+    return {
+      x: point.x * sizeOrMetrics.contentWidth + sizeOrMetrics.offsetX,
+      y: point.y * sizeOrMetrics.contentHeight + sizeOrMetrics.offsetY,
+    };
+  }
+  return {
+    x: point.x * sizeOrMetrics.width,
+    y: point.y * sizeOrMetrics.height,
+  };
+}
+
+export function mapContentToNatural(point: Point, metrics: ContentMetrics, naturalSize: Size): Point {
+  return {
+    x: ((point.x - metrics.offsetX) / metrics.contentWidth) * naturalSize.width,
+    y: ((point.y - metrics.offsetY) / metrics.contentHeight) * naturalSize.height,
+  };
+}
+
+export type Rect = {
+  top: number;
+  left: number;
+  width: number;
+  height: number;
+};
+
+export function mapNormalizedRectToContent(
+  topLeft: Point,
+  bottomRight: Point,
+  sizeOrMetrics: Size | ContentMetrics,
+): Rect {
+  const tl = mapNormalizedToContent(topLeft, sizeOrMetrics);
+  const br = mapNormalizedToContent(bottomRight, sizeOrMetrics);
+  return {
+    top: tl.y,
+    left: tl.x,
+    width: br.x - tl.x,
+    height: br.y - tl.y,
+  };
+}
+
+export function mapContentRectToNatural(rect: Rect, metrics: ContentMetrics, naturalSize: Size): Rect {
+  const topLeft = mapContentToNatural({ x: rect.left, y: rect.top }, metrics, naturalSize);
+  const bottomRight = mapContentToNatural(
+    { x: rect.left + rect.width, y: rect.top + rect.height },
+    metrics,
+    naturalSize,
+  );
+  return {
+    top: topLeft.y,
+    left: topLeft.x,
+    width: bottomRight.x - topLeft.x,
+    height: bottomRight.y - topLeft.y,
+  };
+}

web/src/lib/utils/invocationTracker.ts

@@ -1,66 +1,36 @@
-import { handleError } from '$lib/utils/handle-error';
-
-/**
- * Tracks the state of asynchronous invocations to handle race conditions and stale operations.
- * This class helps manage concurrent operations by tracking which invocations are active
- * and allowing operations to check if they're still valid.
- */
 export class InvocationTracker {
-  /** Counter for the number of invocations that have been started */
   invocationsStarted = 0;
-  /** Counter for the number of invocations that have been completed */
   invocationsEnded = 0;
 
-  constructor() {}
-
-  /**
-   * Starts a new invocation and returns an object with utilities to manage the invocation lifecycle.
-   * @returns  An object containing methods to manage the invocation:
-   *   - isInvalidInvocationError: Checks if an error is an invalid invocation error
-   *   - checkStillValid: Throws an error if the invocation is no longer valid
-   *   - endInvocation: Marks the invocation as complete
-   */
   startInvocation() {
     this.invocationsStarted++;
     const invocation = this.invocationsStarted;
 
     return {
-      /**
+      isStillValid: () => invocation === this.invocationsStarted,
-       * Throws an error if this invocation is no longer valid
-       * @throws {Error} If the invocation is no longer valid
-       */
-      isStillValid: () => {
-        if (invocation !== this.invocationsStarted) {
-          return false;
-        }
-        return true;
-      },
-
-      /**
-       * Marks this invocation as complete
-       */
       endInvocation: () => {
-        this.invocationsEnded = invocation;
+        this.invocationsEnded = Math.max(this.invocationsEnded, invocation);
       },
     };
   }
 
-  /**
-   * Checks if there are any active invocations
-   * @returns True if there are active invocations, false otherwise
-   */
   isActive() {
     return this.invocationsStarted !== this.invocationsEnded;
   }
 
-  async invoke<T>(invocable: () => Promise<T>, localizedMessage: string) {
+  async invoke<T>(invocable: () => Promise<T>, catchCallback?: (error: unknown) => void, finallyCallback?: () => void) {
     const invocation = this.startInvocation();
     try {
       return await invocable();
     } catch (error: unknown) {
-      handleError(error, localizedMessage);
+      if (catchCallback) {
+        catchCallback(error);
+      } else {
+        console.error(error);
+      }
     } finally {
       invocation.endInvocation();
+      finallyCallback?.();
     }
   }
 }

web/src/lib/utils/ocr-utils.spec.ts

@@ -1,5 +1,5 @@
 import type { OcrBoundingBox } from '$lib/stores/ocr.svelte';
-import type { ContentMetrics } from '$lib/utils/container-utils';
+import type { Size } from '$lib/utils/container-utils';
 import { getOcrBoundingBoxes } from '$lib/utils/ocr-utils';
 
 describe('getOcrBoundingBoxes', () => {
@@ -21,9 +21,9 @@ describe('getOcrBoundingBoxes', () => {
         text: 'hello',
       },
     ];
-    const metrics: ContentMetrics = { contentWidth: 1000, contentHeight: 500, offsetX: 0, offsetY: 0 };
+    const imageSize: Size = { width: 1000, height: 500 };
 
-    const boxes = getOcrBoundingBoxes(ocrData, metrics);
+    const boxes = getOcrBoundingBoxes(ocrData, imageSize);
 
     expect(boxes).toHaveLength(1);
     expect(boxes[0].id).toBe('box1');
@@ -37,7 +37,7 @@ describe('getOcrBoundingBoxes', () => {
     ]);
   });
 
-  it('should apply offsets for letterboxed images', () => {
+  it('should map full-image box to full display area', () => {
     const ocrData: OcrBoundingBox[] = [
       {
         id: 'box1',
@@ -55,21 +55,20 @@ describe('getOcrBoundingBoxes', () => {
         text: 'test',
       },
     ];
-    const metrics: ContentMetrics = { contentWidth: 600, contentHeight: 400, offsetX: 100, offsetY: 50 };
+    const imageSize: Size = { width: 600, height: 400 };
 
-    const boxes = getOcrBoundingBoxes(ocrData, metrics);
+    const boxes = getOcrBoundingBoxes(ocrData, imageSize);
 
     expect(boxes[0].points).toEqual([
-      { x: 100, y: 50 },
+      { x: 0, y: 0 },
-      { x: 700, y: 50 },
+      { x: 600, y: 0 },
-      { x: 700, y: 450 },
+      { x: 600, y: 400 },
-      { x: 100, y: 450 },
+      { x: 0, y: 400 },
     ]);
   });
 
   it('should return empty array for empty input', () => {
-    const metrics: ContentMetrics = { contentWidth: 800, contentHeight: 600, offsetX: 0, offsetY: 0 };
+    expect(getOcrBoundingBoxes([], { width: 800, height: 600 })).toEqual([]);
-    expect(getOcrBoundingBoxes([], metrics)).toEqual([]);
   });
 
   it('should handle multiple boxes', () => {
@@ -105,9 +104,9 @@ describe('getOcrBoundingBoxes', () => {
         text: 'second',
       },
     ];
-    const metrics: ContentMetrics = { contentWidth: 200, contentHeight: 200, offsetX: 0, offsetY: 0 };
+    const imageSize: Size = { width: 200, height: 200 };
 
-    const boxes = getOcrBoundingBoxes(ocrData, metrics);
+    const boxes = getOcrBoundingBoxes(ocrData, imageSize);
 
     expect(boxes).toHaveLength(2);
     expect(boxes[0].text).toBe('first');

web/src/lib/utils/ocr-utils.ts

@@ -1,23 +1,19 @@
 import type { OcrBoundingBox } from '$lib/stores/ocr.svelte';
-import type { ContentMetrics } from '$lib/utils/container-utils';
+import { mapNormalizedToContent, type Point, type Size } from '$lib/utils/container-utils';
 import { clamp } from 'lodash-es';
-
+export type { Point } from '$lib/utils/container-utils';
-export type Point = {
-  x: number;
-  y: number;
-};
 
 const distance = (p1: Point, p2: Point) => Math.hypot(p2.x - p1.x, p2.y - p1.y);
 
 export type VerticalMode = 'none' | 'cjk' | 'rotated';
 
-export interface OcrBox {
+export type OcrBox = {
   id: string;
   points: Point[];
   text: string;
   confidence: number;
   verticalMode: VerticalMode;
-}
+};
 
 const CJK_PATTERN =
   /[\u3000-\u303F\u3040-\u309F\u30A0-\u30FF\u3400-\u4DBF\u4E00-\u9FFF\uF900-\uFAFF\uAC00-\uD7AF\uFF00-\uFFEF]/;
@@ -38,7 +34,7 @@ const getVerticalMode = (width: number, height: number, text: string): VerticalM
  * @param points - Array of 4 corner points of the bounding box
  * @returns 4x4 matrix to transform the div with text onto the polygon defined by the corner points, and size to set on the source div.
  */
-export const calculateBoundingBoxMatrix = (points: Point[]): { matrix: number[]; width: number; height: number } => {
+export const calculateBoundingBoxMatrix = (points: Point[]): Size & { matrix: number[] } => {
   const [topLeft, topRight, bottomRight, bottomLeft] = points;
 
   const width = Math.max(distance(topLeft, topRight), distance(bottomLeft, bottomRight));
@@ -163,7 +159,7 @@ export const calculateFittedFontSize = (
   return clamp(Math.min(scaleFromWidth, scaleFromHeight), MIN_FONT_SIZE, MAX_FONT_SIZE);
 };
 
-export const getOcrBoundingBoxes = (ocrData: OcrBoundingBox[], metrics: ContentMetrics): OcrBox[] => {
+export const getOcrBoundingBoxes = (ocrData: OcrBoundingBox[], imageSize: Size): OcrBox[] => {
   const boxes: OcrBox[] = [];
   for (const ocr of ocrData) {
     const points = [
@@ -171,10 +167,7 @@ export const getOcrBoundingBoxes = (ocrData: OcrBoundingBox[], metrics: ContentM
       { x: ocr.x2, y: ocr.y2 },
       { x: ocr.x3, y: ocr.y3 },
       { x: ocr.x4, y: ocr.y4 },
-    ].map((point) => ({
+    ].map((point) => mapNormalizedToContent(point, imageSize));
-      x: point.x * metrics.contentWidth + metrics.offsetX,
-      y: point.y * metrics.contentHeight + metrics.offsetY,
-    }));
 
     const boxWidth = Math.max(distance(points[0], points[1]), distance(points[3], points[2]));
     const boxHeight = Math.max(distance(points[0], points[3]), distance(points[1], points[2]));
@@ -188,7 +181,7 @@ export const getOcrBoundingBoxes = (ocrData: OcrBoundingBox[], metrics: ContentM
     });
   }
 
-  const rowThreshold = metrics.contentHeight * 0.02;
+  const rowThreshold = imageSize.height * 0.02;
   boxes.sort((a, b) => {
     const yDifference = a.points[0].y - b.points[0].y;
     if (Math.abs(yDifference) < rowThreshold) {

web/src/lib/utils/people-utils.spec.ts

@@ -1,6 +1,6 @@
 import type { Faces } from '$lib/stores/people.store';
-import type { ContentMetrics } from '$lib/utils/container-utils';
+import type { Size } from '$lib/utils/container-utils';
-import { getBoundingBox } from '$lib/utils/people-utils';
+import { getBoundingBox, scaleFaceRectOnResize, type FaceRectState, type ResizeContext } from '$lib/utils/people-utils';
 
 const makeFace = (overrides: Partial<Faces> = {}): Faces => ({
   id: 'face-1',
@@ -16,21 +16,21 @@ const makeFace = (overrides: Partial<Faces> = {}): Faces => ({
 describe('getBoundingBox', () => {
   it('should scale face coordinates to display dimensions', () => {
     const face = makeFace();
-    const metrics: ContentMetrics = { contentWidth: 800, contentHeight: 600, offsetX: 0, offsetY: 0 };
+    const imageSize: Size = { width: 800, height: 600 };
 
-    const boxes = getBoundingBox([face], metrics);
+    const boxes = getBoundingBox([face], imageSize);
 
     expect(boxes).toHaveLength(1);
     expect(boxes[0]).toEqual({
       id: 'face-1',
-      top: Math.round(600 * (750 / 3000)),
+      top: 600 * (750 / 3000),
-      left: Math.round(800 * (1000 / 4000)),
+      left: 800 * (1000 / 4000),
-      width: Math.round(800 * (2000 / 4000) - 800 * (1000 / 4000)),
+      width: 800 * (2000 / 4000) - 800 * (1000 / 4000),
-      height: Math.round(600 * (1500 / 3000) - 600 * (750 / 3000)),
+      height: 600 * (1500 / 3000) - 600 * (750 / 3000),
     });
   });
 
-  it('should apply offsets for letterboxed display', () => {
+  it('should map full-image face to full display area', () => {
     const face = makeFace({
       imageWidth: 1000,
       imageHeight: 1000,
@@ -39,49 +39,21 @@ describe('getBoundingBox', () => {
       boundingBoxX2: 1000,
       boundingBoxY2: 1000,
     });
-    const metrics: ContentMetrics = { contentWidth: 600, contentHeight: 600, offsetX: 100, offsetY: 0 };
+    const imageSize: Size = { width: 600, height: 600 };
 
-    const boxes = getBoundingBox([face], metrics);
+    const boxes = getBoundingBox([face], imageSize);
 
     expect(boxes[0]).toEqual({
       id: 'face-1',
       top: 0,
-      left: 100,
+      left: 0,
       width: 600,
       height: 600,
     });
   });
 
-  it('should handle zoom by pre-scaled metrics', () => {
-    const face = makeFace({
-      imageWidth: 1000,
-      imageHeight: 1000,
-      boundingBoxX1: 0,
-      boundingBoxY1: 0,
-      boundingBoxX2: 500,
-      boundingBoxY2: 500,
-    });
-    const metrics: ContentMetrics = {
-      contentWidth: 1600,
-      contentHeight: 1200,
-      offsetX: -200,
-      offsetY: -100,
-    };
-
-    const boxes = getBoundingBox([face], metrics);
-
-    expect(boxes[0]).toEqual({
-      id: 'face-1',
-      top: -100,
-      left: -200,
-      width: 800,
-      height: 600,
-    });
-  });
-
   it('should return empty array for empty faces', () => {
-    const metrics: ContentMetrics = { contentWidth: 800, contentHeight: 600, offsetX: 0, offsetY: 0 };
+    expect(getBoundingBox([], { width: 800, height: 600 })).toEqual([]);
-    expect(getBoundingBox([], metrics)).toEqual([]);
   });
 
   it('should handle multiple faces', () => {
@@ -89,11 +61,103 @@ describe('getBoundingBox', () => {
       makeFace({ id: 'face-1', boundingBoxX1: 0, boundingBoxY1: 0, boundingBoxX2: 1000, boundingBoxY2: 1000 }),
       makeFace({ id: 'face-2', boundingBoxX1: 2000, boundingBoxY1: 1500, boundingBoxX2: 3000, boundingBoxY2: 2500 }),
     ];
-    const metrics: ContentMetrics = { contentWidth: 800, contentHeight: 600, offsetX: 0, offsetY: 0 };
 
-    const boxes = getBoundingBox(faces, metrics);
+    const boxes = getBoundingBox(faces, { width: 800, height: 600 });
 
     expect(boxes).toHaveLength(2);
     expect(boxes[0].left).toBeLessThan(boxes[1].left);
   });
 });
+
+describe('scaleFaceRectOnResize', () => {
+  const makeRect = (overrides: Partial<FaceRectState> = {}): FaceRectState => ({
+    left: 300,
+    top: 400,
+    scaleX: 1,
+    scaleY: 1,
+    ...overrides,
+  });
+
+  const makePrevious = (overrides: Partial<ResizeContext> = {}): ResizeContext => ({
+    offsetX: 100,
+    offsetY: 50,
+    contentWidth: 800,
+    ...overrides,
+  });
+
+  it('should preserve relative position when container doubles in size', () => {
+    const rect = makeRect({ left: 300, top: 250 });
+    const previous = makePrevious({ offsetX: 100, offsetY: 50, contentWidth: 800 });
+
+    const result = scaleFaceRectOnResize(rect, previous, { offsetX: 200, offsetY: 100, contentWidth: 1600 });
+
+    // imageRelLeft = (300 - 100) * 2 = 400, new left = 200 + 400 = 600
+    // imageRelTop = (250 - 50) * 2 = 400, new top = 100 + 400 = 500
+    expect(result.left).toBe(600);
+    expect(result.top).toBe(500);
+    expect(result.scaleX).toBe(2);
+    expect(result.scaleY).toBe(2);
+  });
+
+  it('should preserve relative position when container halves in size', () => {
+    const rect = makeRect({ left: 300, top: 250 });
+    const previous = makePrevious({ offsetX: 100, offsetY: 50, contentWidth: 800 });
+
+    const result = scaleFaceRectOnResize(rect, previous, { offsetX: 50, offsetY: 25, contentWidth: 400 });
+
+    // imageRelLeft = (300 - 100) * 0.5 = 100, new left = 50 + 100 = 150
+    // imageRelTop = (250 - 50) * 0.5 = 100, new top = 25 + 100 = 125
+    expect(result.left).toBe(150);
+    expect(result.top).toBe(125);
+    expect(result.scaleX).toBe(0.5);
+    expect(result.scaleY).toBe(0.5);
+  });
+
+  it('should handle no change in dimensions', () => {
+    const rect = makeRect({ left: 300, top: 250, scaleX: 1.5, scaleY: 1.5 });
+    const previous = makePrevious({ offsetX: 100, offsetY: 50, contentWidth: 800 });
+
+    const result = scaleFaceRectOnResize(rect, previous, { offsetX: 100, offsetY: 50, contentWidth: 800 });
+
+    expect(result.left).toBe(300);
+    expect(result.top).toBe(250);
+    expect(result.scaleX).toBe(1.5);
+    expect(result.scaleY).toBe(1.5);
+  });
+
+  it('should handle offset changes without content width change', () => {
+    const rect = makeRect({ left: 300, top: 250 });
+    const previous = makePrevious({ offsetX: 100, offsetY: 50, contentWidth: 800 });
+
+    const result = scaleFaceRectOnResize(rect, previous, { offsetX: 150, offsetY: 75, contentWidth: 800 });
+
+    // scale = 1, imageRelLeft = 200, imageRelTop = 200
+    // new left = 150 + 200 = 350, new top = 75 + 200 = 275
+    expect(result.left).toBe(350);
+    expect(result.top).toBe(275);
+    expect(result.scaleX).toBe(1);
+    expect(result.scaleY).toBe(1);
+  });
+
+  it('should compound existing scale factors', () => {
+    const rect = makeRect({ left: 300, top: 250, scaleX: 2, scaleY: 3 });
+    const previous = makePrevious({ contentWidth: 800 });
+
+    const result = scaleFaceRectOnResize(rect, previous, { ...previous, contentWidth: 1600 });
+
+    expect(result.scaleX).toBe(4);
+    expect(result.scaleY).toBe(6);
+  });
+
+  it('should handle rect at image origin (top-left of content area)', () => {
+    const rect = makeRect({ left: 100, top: 50 });
+    const previous = makePrevious({ offsetX: 100, offsetY: 50, contentWidth: 800 });
+
+    const result = scaleFaceRectOnResize(rect, previous, { offsetX: 200, offsetY: 100, contentWidth: 1600 });
+
+    // imageRelLeft = (100 - 100) * 2 = 0, new left = 200
+    // imageRelTop = (50 - 50) * 2 = 0, new top = 100
+    expect(result.left).toBe(200);
+    expect(result.top).toBe(100);
+  });
+});

web/src/lib/utils/people-utils.ts

@@ -1,42 +1,52 @@
 import type { Faces } from '$lib/stores/people.store';
 import { getAssetMediaUrl } from '$lib/utils';
-import type { ContentMetrics } from '$lib/utils/container-utils';
+import { mapNormalizedRectToContent, type ContentMetrics, type Rect, type Size } from '$lib/utils/container-utils';
 import { AssetTypeEnum, type AssetFaceResponseDto } from '@immich/sdk';
 
-export interface BoundingBox {
+export type BoundingBox = Rect & { id: string };
-  id: string;
-  top: number;
-  left: number;
-  width: number;
-  height: number;
-}
 
-export const getBoundingBox = (faces: Faces[], metrics: ContentMetrics): BoundingBox[] => {
+export const getBoundingBox = (faces: Faces[], imageSize: Size): BoundingBox[] => {
   const boxes: BoundingBox[] = [];
 
   for (const face of faces) {
-    const scaleX = metrics.contentWidth / face.imageWidth;
+    const rect = mapNormalizedRectToContent(
-    const scaleY = metrics.contentHeight / face.imageHeight;
+      { x: face.boundingBoxX1 / face.imageWidth, y: face.boundingBoxY1 / face.imageHeight },
+      { x: face.boundingBoxX2 / face.imageWidth, y: face.boundingBoxY2 / face.imageHeight },
+      imageSize,
+    );
 
-    const coordinates = {
+    boxes.push({ id: face.id, ...rect });
-      x1: scaleX * face.boundingBoxX1 + metrics.offsetX,
-      x2: scaleX * face.boundingBoxX2 + metrics.offsetX,
-      y1: scaleY * face.boundingBoxY1 + metrics.offsetY,
-      y2: scaleY * face.boundingBoxY2 + metrics.offsetY,
-    };
-
-    boxes.push({
-      id: face.id,
-      top: Math.round(coordinates.y1),
-      left: Math.round(coordinates.x1),
-      width: Math.round(coordinates.x2 - coordinates.x1),
-      height: Math.round(coordinates.y2 - coordinates.y1),
-    });
   }
 
   return boxes;
 };
 
+export type FaceRectState = {
+  left: number;
+  top: number;
+  scaleX: number;
+  scaleY: number;
+};
+
+export type ResizeContext = Pick<ContentMetrics, 'contentWidth' | 'offsetX' | 'offsetY'>;
+
+export const scaleFaceRectOnResize = (
+  faceRect: FaceRectState,
+  previous: ResizeContext,
+  current: ResizeContext,
+): FaceRectState => {
+  const scale = current.contentWidth / previous.contentWidth;
+  const imageRelativeLeft = (faceRect.left - previous.offsetX) * scale;
+  const imageRelativeTop = (faceRect.top - previous.offsetY) * scale;
+
+  return {
+    left: current.offsetX + imageRelativeLeft,
+    top: current.offsetY + imageRelativeTop,
+    scaleX: faceRect.scaleX * scale,
+    scaleY: faceRect.scaleY * scale,
+  };
+};
+
 export const zoomImageToBase64 = async (
   face: AssetFaceResponseDto,
   assetId: string,

web/src/lib/utils/transition-utils.ts

@@ -0,0 +1,144 @@
+import { goto } from '$app/navigation';
+import { eventManager } from '$lib/managers/event-manager.svelte';
+import { viewTransitionManager } from '$lib/managers/ViewTransitionManager.svelte';
+import { Route } from '$lib/route';
+import { tick } from 'svelte';
+
+export function startViewerTransition(
+  assetId: string,
+  navigate: () => void,
+  setTransitionId: (id: string | null) => void,
+) {
+  void viewTransitionManager.startTransition({
+    types: ['viewer'],
+    prepareOldSnapshot: () => {
+      setTransitionId(assetId);
+    },
+    performUpdate: async (signal) => {
+      setTransitionId(null);
+      const ready = eventManager.untilNext('ViewerOpenTransitionReady', { signal });
+      navigate();
+      await ready;
+      eventManager.emit('ViewerOpenTransition');
+      await tick();
+    },
+  });
+}
+
+let activeOverlay: HTMLElement | undefined;
+
+export function removeCrossfadeOverlay() {
+  if (activeOverlay) {
+    activeOverlay.remove();
+    activeOverlay = undefined;
+  }
+}
+
+export function navigateToTimeline(
+  assetId: string,
+  options: { types: string[]; prepareOldSnapshot?: () => void; onFinished?: () => void },
+) {
+  let heroOverlay: HTMLElement | null = null;
+  let hiddenElement: HTMLElement | null = null;
+
+  void viewTransitionManager.startTransition({
+    types: options.types,
+    prepareOldSnapshot: options.prepareOldSnapshot,
+    performUpdate: async () => {
+      const scrolled = eventManager.untilNext('TimelineScrolledToAsset');
+      await goto(Route.photos({ at: assetId }));
+      await scrolled;
+      await tick();
+
+      const element = document.querySelector<HTMLElement>(`[data-asset-id="${CSS.escape(assetId)}"]`);
+      if (!element) {
+        return;
+      }
+
+      const rect = element.getBoundingClientRect();
+      const img = element.querySelector('img');
+
+      hiddenElement = element;
+      element.style.visibility = 'hidden';
+
+      heroOverlay = document.createElement('div');
+      heroOverlay.style.cssText = `
+        position: fixed;
+        top: ${rect.top}px;
+        left: ${rect.left}px;
+        width: ${rect.width}px;
+        height: ${rect.height}px;
+        view-transition-name: hero;
+        pointer-events: none;
+        z-index: -1;
+        overflow: hidden;
+      `;
+      if (img?.src) {
+        heroOverlay.style.backgroundImage = `url("${CSS.escape(img.src)}")`;
+        heroOverlay.style.backgroundSize = 'cover';
+        heroOverlay.style.backgroundPosition = 'center';
+      }
+      document.body.append(heroOverlay);
+    },
+    onFinished: () => {
+      heroOverlay?.remove();
+      heroOverlay = null;
+      if (hiddenElement) {
+        hiddenElement.style.visibility = '';
+        hiddenElement = null;
+      }
+      options.onFinished?.();
+    },
+  });
+}
+
+export async function crossfadeViewerContent(updateFn: () => void | Promise<void>, duration = 200) {
+  const viewerContent = document.querySelector<HTMLElement>('[data-viewer-content]');
+  if (!viewerContent) {
+    await updateFn();
+    return;
+  }
+
+  removeCrossfadeOverlay();
+
+  const clone = viewerContent.cloneNode(true) as HTMLElement;
+  Object.assign(clone.style, {
+    position: 'absolute',
+    inset: '0',
+    zIndex: '1',
+    pointerEvents: 'none',
+  });
+  delete clone.dataset.viewerContent;
+  if (!viewerContent.parentElement) {
+    await updateFn();
+    return;
+  }
+  viewerContent.parentElement.append(clone);
+  activeOverlay = clone;
+
+  const ready = eventManager.untilNext('ViewerOpenTransitionReady');
+  await updateFn();
+
+  try {
+    await ready;
+  } catch {
+    clone.remove();
+    if (activeOverlay === clone) {
+      activeOverlay = undefined;
+    }
+    return;
+  }
+
+  const fadeOut = clone.animate([{ opacity: 1 }, { opacity: 0 }], {
+    duration,
+    easing: 'cubic-bezier(0.4, 0, 1, 1)',
+    fill: 'forwards',
+  });
+
+  void fadeOut.finished.then(() => {
+    clone.remove();
+    if (activeOverlay === clone) {
+      activeOverlay = undefined;
+    }
+  });
+}

web/src/routes/(user)/+layout.svelte

@@ -24,7 +24,7 @@
   });
 </script>
 
-<div class:display-none={$showAssetViewer}>
+<div class:invisible={$showAssetViewer}>
   {@render children?.()}
 </div>
 <UploadCover />
@@ -33,7 +33,4 @@
   :root {
     overscroll-behavior: none;
   }
-  .display-none {
-    display: none;
-  }
 </style>

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

@@ -6,13 +6,16 @@
   import { timeToLoadTheMap } from '$lib/constants';
   import Portal from '$lib/elements/Portal.svelte';
   import { featureFlagsManager } from '$lib/managers/feature-flags-manager.svelte';
+  import { viewTransitionManager } from '$lib/managers/ViewTransitionManager.svelte';
   import { Route } from '$lib/route';
   import { assetViewingStore } from '$lib/stores/asset-viewing.store';
   import { handlePromiseError } from '$lib/utils';
   import { delay } from '$lib/utils/asset-utils';
   import { navigate } from '$lib/utils/navigation';
   import { LoadingSpinner } from '@immich/ui';
+  import { linear } from 'svelte/easing';
   import { onDestroy } from 'svelte';
+  import { fly } from 'svelte/transition';
   import type { PageData } from './$types';
 
   interface Props {
@@ -41,9 +44,14 @@
     handlePromiseError(goto(Route.photos()));
   }
 
-  async function onViewAssets(assetIds: string[]) {
+  function onViewAssets(assetIds: string[]) {
-    await setAssetId(assetIds[0]);
+    void viewTransitionManager.startTransition({
-    closeTimelinePanel();
+      types: ['viewer'],
+      performUpdate: async () => {
+        await setAssetId(assetIds[0]);
+        closeTimelinePanel();
+      },
+    });
   }
 
   function onClusterSelect(assetIds: string[], bbox: SelectionBBox) {
@@ -77,7 +85,10 @@
       </div>
 
       {#if isTimelinePanelVisible && selectedClusterBBox}
-        <div class="h-1/2 min-h-0 w-full pt-2 sm:h-full sm:w-1/3 sm:ps-2 sm:pt-0">
+        <div
+          transition:fly={{ x: 400, duration: 150, easing: linear }}
+          class="h-1/2 min-h-0 w-full pt-2 sm:h-full sm:w-1/3 sm:ps-2 sm:pt-0"
+        >
           <MapTimelinePanel
             bbox={selectedClusterBBox}
             {selectedClusterIds}
@@ -89,7 +100,7 @@
     </div>
   </UserPageLayout>
   <Portal target="body">
-    {#if $showAssetViewer}
+    {#if $showAssetViewer && !isTimelinePanelVisible}
       {#await import('$lib/components/asset-viewer/asset-viewer.svelte') then { default: AssetViewer }}
         <AssetViewer
           cursor={{ current: $viewingAsset }}

web/src/routes/+layout.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { afterNavigate, beforeNavigate, goto } from '$app/navigation';
+  import { afterNavigate, beforeNavigate, goto, onNavigate } from '$app/navigation';
   import { page } from '$app/state';
   import { shortcut } from '$lib/actions/shortcut';
   import DownloadPanel from '$lib/components/asset-viewer/download-panel.svelte';
@@ -8,6 +8,7 @@
   import NavigationLoadingBar from '$lib/components/shared-components/navigation-loading-bar.svelte';
   import UploadPanel from '$lib/components/shared-components/upload-panel.svelte';
   import VersionAnnouncement from '$lib/components/VersionAnnouncement.svelte';
+  import { appManager } from '$lib/managers/app-manager.svelte';
   import { eventManager } from '$lib/managers/event-manager.svelte';
   import { serverConfigManager } from '$lib/managers/server-config-manager.svelte';
   import { themeManager } from '$lib/managers/theme-manager.svelte';
@@ -77,6 +78,8 @@
 
   let showNavigationLoadingBar = $state(false);
 
+  appManager.isAssetViewer = isAssetViewerRoute(page);
+
   const getMyImmichLink = () => {
     return new URL(page.url.pathname + page.url.search, 'https://my.immich.app');
   };
@@ -102,8 +105,15 @@
     showNavigationLoadingBar = true;
   });
 
-  afterNavigate(() => {
+  onNavigate(({ to }) => {
-    showNavigationLoadingBar = false;
+    appManager.isAssetViewer = isAssetViewerRoute(to);
+  });
+
+  afterNavigate(({ to, complete }) => {
+    appManager.isAssetViewer = isAssetViewerRoute(to);
+    void complete.finally(() => {
+      showNavigationLoadingBar = false;
+    });
   });
 
   const { serverRestarting } = websocketStore;