fix: Improve folder icon rendering (#2467)

src/components-lib/thumbnail/feature/controller.ts

@@ -76,7 +76,15 @@ export class ThumbnailFeatureController {
     if (thumbnail) {
       this._thumbnail = thumbnail;
       this._icon = null;
-      this._thumbnailClass = isBrandUrl(thumbnail) ? 'placeholder' : null;
+      // Treat as a placeholder (centered, contain-fit) when either the URL
+      // looks brand-like, or the item is a folder. The folder check is
+      // necessary because HA's media browser often returns folder thumbnails
+      // as local/proxy URLs that don't match isBrandUrl, even though they
+      // visually represent integration logos.
+      this._thumbnailClass =
+        isBrandUrl(thumbnail) || ViewItemClassifier.isFolder(item)
+          ? 'placeholder'
+          : null;
     } else {
       this._thumbnail = null;
       this._thumbnailClass = null;

src/scss/thumbnail-feature-thumbnail.scss

@@ -31,6 +31,12 @@ img {
   object-fit: cover;
 }
 
+// Placeholder images (brand logos, folder icons) are not previews of content,
+// so they should be shown in full rather than cropped to fill a square.
+:host(.placeholder) img {
+  object-fit: contain;
+}
+
 advanced-camera-card-icon {
   display: flex;
   width: 50%;

src/scss/thumbnail-feature.scss

@@ -45,13 +45,30 @@ advanced-camera-card-thumbnail-feature-thumbnail:not(.placeholder) {
   left: 0;
 }
 
-// Placeholder icons/thumbnails: centered, 90% of container height
+// Placeholder icons/thumbnails: nearly fill the .media container so wide logos
+// can use the full width. Per-image fit (contain vs cover) is handled inside
+// the inner thumbnail/icon.
+//
+// The two size rules look inverted (95% with text, 60% without) because the
+// percentages are relative to .media, which itself differs by case:
+//   .has-text       → .media is 100% × 50% of tile, so 95% ≈ 47% of tile height
+//   :not(.has-text) → .media is 100% × 100% of tile, so 60% = 60% of tile height
+// Both cases land at roughly half-tile visible; without the no-text shrink the
+// placeholder would fill the entire tile and stop reading as an icon.
 advanced-camera-card-thumbnail-feature-thumbnail.placeholder,
 advanced-camera-card-icon.placeholder {
-  height: 90%;
-  aspect-ratio: 1 / 1;
   --mdc-icon-size: 100%;
 }
+.media.has-text > advanced-camera-card-thumbnail-feature-thumbnail.placeholder,
+.media.has-text > advanced-camera-card-icon.placeholder {
+  width: 95%;
+  height: 95%;
+}
+.media:not(.has-text) > advanced-camera-card-thumbnail-feature-thumbnail.placeholder,
+.media:not(.has-text) > advanced-camera-card-icon.placeholder {
+  width: 60%;
+  height: 60%;
+}
 
 advanced-camera-card-icon.background {
   display: block;

tests/components-lib/thumbnail/feature/controller.test.ts

@@ -177,5 +177,18 @@ describe('ThumbnailFeatureController', () => {
       expect(controller.getThumbnail()).toBe('https://card.camera/thumbnail.jpg');
       expect(controller.getThumbnailClass()).toBeNull();
     });
+
+    it('should set placeholder thumbnail for non-brand folder thumbnail', () => {
+      const controller = new ThumbnailFeatureController();
+      const folder = new ViewFolder(createFolder(), [], {
+        title: 'Test Folder',
+        thumbnail: 'https://card.camera/thumbnail.jpg',
+      });
+
+      controller.calculate(null, folder, false);
+
+      expect(controller.getThumbnail()).toBe('https://card.camera/thumbnail.jpg');
+      expect(controller.getThumbnailClass()).toBe('placeholder');
+    });
   });
 });