feat(web): Improve duplicate suggestion (#14947)

* feat: Improve duplicate suggestion

* format

* feat(web): Add deduplication info popup

* fix: lint

* fmt

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

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

@@ -0,0 +1,29 @@
+import { getExifCount } from '$lib/utils/exif-utils';
+import type { AssetResponseDto } from '@immich/sdk';
+
+describe('getting the exif count', () => {
+  it('returns 0 when exifInfo is undefined', () => {
+    const asset = {};
+    expect(getExifCount(asset as AssetResponseDto)).toBe(0);
+  });
+
+  it('returns 0 when exifInfo is empty', () => {
+    const asset = { exifInfo: {} };
+    expect(getExifCount(asset as AssetResponseDto)).toBe(0);
+  });
+
+  it('returns the correct count of non-null exifInfo properties', () => {
+    const asset = { exifInfo: { fileSizeInByte: 200, rating: 5, fNumber: null } };
+    expect(getExifCount(asset as AssetResponseDto)).toBe(2);
+  });
+
+  it('ignores null, undefined and empty properties in exifInfo', () => {
+    const asset = { exifInfo: { fileSizeInByte: 200, rating: null, fNumber: undefined, description: '' } };
+    expect(getExifCount(asset as AssetResponseDto)).toBe(1);
+  });
+
+  it('returns the correct count when all exifInfo properties are non-null', () => {
+    const asset = { exifInfo: { fileSizeInByte: 200, rating: 5, fNumber: 1, description: 'test' } };
+    expect(getExifCount(asset as AssetResponseDto)).toBe(4);
+  });
+});