fix(frontend): reposition search indicator into toolbar and fix album cover art lookup

Move search indicator from absolute-positioned overlay into sort toolbar
(or dedicated search-bar-row for artists/genres views). Shows indicator
on empty-state screens. Fix cover art not displaying for expanded album
tracks by checking expandedAlbumId before the albumName guard. Add
ScanWarning model bindings.

frontend/src/components/cover-grid/album-selection.ts

@@ -313,10 +313,12 @@ export class AlbumSelectionManager {
         albumName: string,
         expandedAlbumId: number | null,
     ): CoverArtUrls | null {
-        if (!albumName) return null;
-
         // Prefer the expanded album (we know the track
-        // belongs to it) for an O(1) lookup.
+        // belongs to it) for an O(1) lookup.  This must
+        // run before the albumName guard because
+        // GetAlbumTracks returns tracks without an Album
+        // field, so albumName may be empty even when the
+        // album ID is known.
         if (expandedAlbumId !== null) {
             const album = this.albumById.get(
                 expandedAlbumId,
@@ -333,6 +335,8 @@ export class AlbumSelectionManager {
             }
         }
 
+        if (!albumName) return null;
+
         // Fallback: name-based search across all albums.
         for (const album of this.albumById.values()) {
             if (

frontend/src/components/cover-grid/cover-grid-styles.ts

@@ -243,17 +243,19 @@ const gridStyles = css`
         color: var(--yj-text-secondary, #b3b3b3);
     }
 
+    .sort-toolbar {
+        position: relative;
+    }
+
     .search-indicator {
         position: absolute;
-        top: 8px;
         left: 50%;
         transform: translateX(-50%);
-        z-index: 5;
         pointer-events: none;
         background: var(--yj-bg-overlay, #495057);
         color: var(--yj-text-secondary, #b3b3b3);
         font-size: var(--yj-text-sm);
-        padding: 4px 14px;
+        padding: 2px 14px;
         border-radius: 12px;
         border: 1px solid
             var(--yj-border-subtle, #555);

frontend/src/components/cover-grid/cover-grid.ts

@@ -1613,6 +1613,12 @@ export class CoverGrid
                         name=${dirIcon}
                     ></wa-icon>
                 </button>
+                ${this.searchCtrl.term
+                    ? html`<div class="search-indicator">
+                          Showing results for
+                          &ldquo;${this.searchCtrl.term}&rdquo;
+                      </div>`
+                    : nothing}
             </div>
             ${this.renderSortDropdownPopup()}
         `;
@@ -1812,6 +1818,7 @@ export class CoverGrid
 
         if (this.cachedFilteredAlbums.length === 0) {
             return html`
+                ${this.renderSortToolbar()}
                 <div class="empty-state">
                     <p>No albums match your search.</p>
                 </div>
@@ -1824,12 +1831,6 @@ export class CoverGrid
 
         return html`
             ${this.renderSortToolbar()}
-            ${this.searchCtrl.term
-                ? html`<div class="search-indicator">
-                      Showing results for
-                      &ldquo;${this.searchCtrl.term}&rdquo;
-                  </div>`
-                : nothing}
             <div
                 class="grid-scroll-container"
                 @click=${this.onGridClick}