diff --git a/core/jellyfin_client.py b/core/jellyfin_client.py
index 4937c2c0..8ee4eb74 100644
--- a/core/jellyfin_client.py
+++ b/core/jellyfin_client.py
@@ -65,7 +65,19 @@ class JellyfinAlbum:
         self.title = jellyfin_data.get('Name', 'Unknown Album')
         self.addedAt = self._parse_date(jellyfin_data.get('DateCreated'))
         self._artist_id = jellyfin_data.get('AlbumArtists', [{}])[0].get('Id', '') if jellyfin_data.get('AlbumArtists') else ''
-        
+        # Album cover image, mirroring JellyfinArtist.thumb — so the library
+        # scan stores albums.thumb_url instead of leaving it empty. Without
+        # this, EVERY album reads back with no thumb, the web UI shows blank
+        # art, and the Cover Art Filler flags the entire library as "missing
+        # cover art" (it became the only thing populating the column).
+        self.thumb = self._get_album_image_url()
+
+    def _get_album_image_url(self) -> Optional[str]:
+        """Jellyfin/Emby album primary image URL (same shape as the artist one)."""
+        if not self.ratingKey:
+            return None
+        return f"/Items/{self.ratingKey}/Images/Primary"
+
     def _parse_date(self, date_str: Optional[str]) -> Optional[datetime]:
         if not date_str:
             return None
@@ -73,7 +85,7 @@ class JellyfinAlbum:
             return datetime.fromisoformat(date_str.replace('Z', '+00:00'))
         except:
             return None
-    
+
     def artist(self) -> Optional[JellyfinArtist]:
         """Get the album artist"""
         if self._artist_id:
diff --git a/tests/test_jellyfin_album_thumb.py b/tests/test_jellyfin_album_thumb.py
new file mode 100644
index 00000000..f04c3d21
--- /dev/null
+++ b/tests/test_jellyfin_album_thumb.py
@@ -0,0 +1,31 @@
+"""JellyfinAlbum must expose a cover-image thumb so the library scan stores
+albums.thumb_url (mirroring JellyfinArtist). Without it the whole library reads
+back with empty album thumbs — blank art in the UI + the Cover Art Filler
+flagging every album as "missing cover art".
+"""
+
+from __future__ import annotations
+
+from core.jellyfin_client import JellyfinAlbum, JellyfinArtist
+
+
+class _Client:
+    pass
+
+
+def test_album_has_primary_image_thumb():
+    alb = JellyfinAlbum({'Id': 'abc123', 'Name': 'For You'}, _Client())
+    assert alb.thumb == '/Items/abc123/Images/Primary'
+
+
+def test_album_thumb_none_without_id():
+    alb = JellyfinAlbum({'Name': 'No Id Album'}, _Client())
+    assert alb.thumb is None
+
+
+def test_album_thumb_matches_artist_shape():
+    # Same URL shape the artist uses (already proven to display) — just the
+    # album's own item id.
+    art = JellyfinArtist({'Id': 'xyz', 'Name': 'A'}, _Client())
+    alb = JellyfinAlbum({'Id': 'xyz', 'Name': 'B'}, _Client())
+    assert alb.thumb == art.thumb