feat(web): highlight active person thumbnail in detail panel and edit faces panel (#27401)

- Dim non-hovered person thumbnails to 40% opacity when any face is active
- Add ring highlight on the active person's thumbnail
- Add focus-visible outline styling for keyboard navigation
- Apply same treatment to both detail panel people section and edit faces side panel

Change-Id: I4ac10fe4568b95f3e0e8d9104133180f6a6a6964

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

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

@@ -227,8 +227,9 @@
       <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 = [])}
@@ -245,6 +246,8 @@
                   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>

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 = '',
@@ -60,6 +62,8 @@
     shadow && 'shadow-lg',
     (circle || !heightStyle) && 'aspect-square',
     border && 'border-3 border-immich-dark-primary/80 hover:border-immich-primary',
+    'transition-shadow duration-150',
+    highlighted && 'ring-4 ring-immich-primary dark:ring-immich-dark-primary',
   ]);
 
   let style = $derived(

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

@@ -225,6 +225,7 @@
       {:else}
         {#each peopleWithFaces as face, index (face.id)}
           {@const personName = face.person ? face.person?.name : $t('face_unassigned')}
+          {@const isHighlighted = $boundingBoxesArray.some((b) => b.id === face.id)}
           <div class="relative h-29 w-24">
             <div
               role="button"
@@ -239,6 +240,7 @@
                   <ImageThumbnail
                     curve
                     shadow
+                    highlighted={isHighlighted}
                     url={selectedPersonToCreate[face.id]}
                     altText={$t('new_person')}
                     title={$t('new_person')}
@@ -249,6 +251,7 @@
                   <ImageThumbnail
                     curve
                     shadow
+                    highlighted={isHighlighted}
                     url={getPeopleThumbnailUrl(selectedPersonToReassign[face.id])}
                     altText={selectedPersonToReassign[face.id].name}
                     title={$getPersonNameWithHiddenValue(
@@ -263,6 +266,7 @@
                   <ImageThumbnail
                     curve
                     shadow
+                    highlighted={isHighlighted}
                     url={getPeopleThumbnailUrl(face.person)}
                     altText={face.person.name}
                     title={$getPersonNameWithHiddenValue(face.person.name, face.person.isHidden)}
@@ -275,6 +279,7 @@
                     <ImageThumbnail
                       curve
                       shadow
+                      highlighted={isHighlighted}
                       url="/src/lib/assets/no-thumbnail.png"
                       altText={$t('face_unassigned')}
                       title={$t('face_unassigned')}
@@ -285,6 +290,7 @@
                     <ImageThumbnail
                       curve
                       shadow
+                      highlighted={isHighlighted}
                       url={data === null ? '/src/lib/assets/no-thumbnail.png' : data}
                       altText={$t('face_unassigned')}
                       title={$t('face_unassigned')}