feat(web): bounding box for faces when hovering over the face in photo view (#26667)

* feat(web): when hovering over a face already deteced, display the bounding box also shown when hovering over the person in the details-pane.

* prevent lint error

* fix unused var

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

@@ -11,7 +11,7 @@
   import { imageManager } from '$lib/managers/ImageManager.svelte';
   import { isFaceEditMode } from '$lib/stores/face-edit.svelte';
   import { ocrManager } from '$lib/stores/ocr.svelte';
-  import { boundingBoxesArray } from '$lib/stores/people.store';
+  import { boundingBoxesArray, type Faces } from '$lib/stores/people.store';
   import { SlideshowLook, SlideshowState, slideshowLookCssMapping, slideshowStore } from '$lib/stores/slideshow.store';
   import { getAssetUrl, targetImageSize as getTargetImageSize, handlePromiseError } from '$lib/utils';
   import { canCopyImageToClipboard, copyImageToClipboard } from '$lib/utils/asset-utils';
@@ -195,6 +195,42 @@
     }
     lastUrl = imageLoaderUrl;
   });
+
+  const faceToNameMap = $derived.by(() => {
+    // eslint-disable-next-line svelte/prefer-svelte-reactivity
+    const map = new Map<Faces, string>();
+    for (const person of asset.people ?? []) {
+      for (const face of person.faces ?? []) {
+        map.set(face, person.name);
+      }
+    }
+    return map;
+  });
+
+  const faces = $derived(Array.from(faceToNameMap.keys()));
+
+  const handleImageMouseMove = (event: MouseEvent) => {
+    $boundingBoxesArray = [];
+    if (!assetViewerManager.imgRef || !element || isFaceEditMode.value || ocrManager.showOverlay) {
+      return;
+    }
+
+    const containerRect = element.getBoundingClientRect();
+    const mouseX = event.clientX - containerRect.left;
+    const mouseY = event.clientY - containerRect.top;
+
+    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} />
@@ -218,6 +254,9 @@
   class="relative h-full w-full select-none"
   bind:clientWidth={containerWidth}
   bind:clientHeight={containerHeight}
+  role="presentation"
+  onmousemove={handleImageMouseMove}
+  onmouseleave={handleImageMouseLeave}
 >
   {#if !imageLoaded}
     <div id="spinner" class="flex h-full items-center justify-center">
@@ -248,11 +287,20 @@
           : slideshowLookCssMapping[$slideshowLook]}"
         draggable="false"
       />
-      {#each getBoundingBox($boundingBoxesArray, overlayMetrics) as boundingbox (boundingbox.id)}
+      {#each getBoundingBox($boundingBoxesArray, overlayMetrics) as boundingbox, index (boundingbox.id)}
         <div
           class="absolute border-solid border-white border-3 rounded-lg"
           style="top: {boundingbox.top}px; left: {boundingbox.left}px; height: {boundingbox.height}px; width: {boundingbox.width}px;"
         ></div>
+        {#if faceToNameMap.get($boundingBoxesArray[index])}
+          <div
+            class="absolute bg-white/90 text-black px-2 py-1 rounded text-sm font-medium whitespace-nowrap pointer-events-none shadow-lg"
+            style="top: {boundingbox.top + boundingbox.height + 4}px; left: {boundingbox.left +
+              boundingbox.width}px; transform: translateX(-100%);"
+          >
+            {faceToNameMap.get($boundingBoxesArray[index])}
+          </div>
+        {/if}
       {/each}
 
       {#each ocrBoxes as ocrBox (ocrBox.id)}