perf(search): reduce list rendering and provider rebuilds

lib/screens/home_tab.dart

@@ -765,22 +765,25 @@ class _HomeTabState extends ConsumerState<HomeTab>
       ),
     );
 
-    final hasExploreContent = ref.watch(
-      exploreProvider.select((s) => s.sections.isNotEmpty),
-    );
-    final exploreLoading = ref.watch(
-      exploreProvider.select((s) => s.isLoading),
-    );
-    final hasHomeFeedExtension = ref.watch(
-      extensionProvider.select(
-        (s) => s.extensions.any((e) => e.enabled && e.hasHomeFeed),
-      ),
-    );
-    final homeFeedDisabled = ref.watch(
-      settingsProvider.select(
-        (s) => s.homeFeedProvider == AppSettings.homeFeedProviderOff,
-      ),
-    );
+    final hasExploreContent =
+        _showsHome &&
+        ref.watch(exploreProvider.select((s) => s.sections.isNotEmpty));
+    final exploreLoading =
+        _showsHome && ref.watch(exploreProvider.select((s) => s.isLoading));
+    final hasHomeFeedExtension =
+        _showsHome &&
+        ref.watch(
+          extensionProvider.select(
+            (s) => s.extensions.any((e) => e.enabled && e.hasHomeFeed),
+          ),
+        );
+    final homeFeedDisabled =
+        _showsHome &&
+        ref.watch(
+          settingsProvider.select(
+            (s) => s.homeFeedProvider == AppSettings.homeFeedProviderOff,
+          ),
+        );
 
     final colorScheme = Theme.of(context).colorScheme;
     final searchText = _showsSearch ? _urlController.text.trim() : '';
@@ -804,9 +807,11 @@ class _HomeTabState extends ConsumerState<HomeTab>
         _showsSearch &&
         ref.watch(trackProvider.select((s) => s.isShowingRecentAccess));
     final screenHeight = MediaQuery.sizeOf(context).height;
-    final hasHistoryItems = ref.watch(
-      _homeHistoryPreviewProvider.select((items) => items.isNotEmpty),
-    );
+    final hasHistoryItems =
+        _showsHome &&
+        ref.watch(
+          _homeHistoryPreviewProvider.select((items) => items.isNotEmpty),
+        );
 
     final recentModeRequested =
         widget.mode == HomeTabMode.search ||
@@ -982,9 +987,7 @@ class _HomeTabState extends ConsumerState<HomeTab>
                     final recentAccessView = ref.watch(
                       recentAccessViewProvider,
                     );
-                    return SliverToBoxAdapter(
-                      child: _buildRecentAccess(recentAccessView, colorScheme),
-                    );
+                    return _buildRecentAccess(recentAccessView, colorScheme);
                   },
                 ),
 
@@ -1113,6 +1116,7 @@ class _HomeTabState extends ConsumerState<HomeTab>
 
                     return SliverMainAxisGroup(
                       slivers: _buildSearchResults(
+                        resultsRef: ref,
                         tracks: tracks,
                         isLoading: isLoading,
                         error: error,

lib/screens/home_tab_recent.dart

@@ -2,12 +2,43 @@ part of 'home_tab.dart';
 
 extension _HomeTabRecentUI on _HomeTabState {
   Widget _buildRecentAccess(_RecentAccessView view, ColorScheme colorScheme) {
+    return SliverMainAxisGroup(
+      slivers: [
+        SliverToBoxAdapter(child: _buildRecentAccessHeader(view, colorScheme)),
+        if (view.uniqueItems.isNotEmpty)
+          SliverPadding(
+            padding:
+                const EdgeInsets.fromLTRB(16, 0, 16, 8) +
+                EdgeInsets.symmetric(horizontal: wideListInset(context)),
+            sliver: SliverList.builder(
+              itemCount: view.uniqueItems.length,
+              itemBuilder: (context, index) {
+                final item = view.uniqueItems[index];
+                return KeyedSubtree(
+                  key: ValueKey('${item.type.name}:${item.id}'),
+                  child: _buildRecentAccessItem(
+                    item,
+                    colorScheme,
+                    view.downloadFilePathByRecentKey,
+                  ),
+                );
+              },
+            ),
+          ),
+      ],
+    );
+  }
+
+  Widget _buildRecentAccessHeader(
+    _RecentAccessView view,
+    ColorScheme colorScheme,
+  ) {
     final uniqueItems = view.uniqueItems;
     final hasHiddenDownloads = view.hasHiddenDownloads;
 
     return Padding(
       padding:
-          const EdgeInsets.fromLTRB(16, 8, 16, 8) +
+          EdgeInsets.fromLTRB(16, 8, 16, uniqueItems.isEmpty ? 8 : 0) +
           EdgeInsets.symmetric(horizontal: wideListInset(context)),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
@@ -99,14 +130,6 @@ extension _HomeTabRecentUI on _HomeTabState {
                   ],
                 ),
               ),
-            )
-          else
-            ...uniqueItems.map(
-              (item) => _buildRecentAccessItem(
-                item,
-                colorScheme,
-                view.downloadFilePathByRecentKey,
-              ),
             ),
         ],
       ),

lib/screens/home_tab_search_results.dart

@@ -299,6 +299,7 @@ extension _HomeTabSearchResultsUI on _HomeTabState {
   }
 
   List<Widget> _buildSearchResults({
+    required WidgetRef resultsRef,
     required List<Track> tracks,
     required bool isLoading,
     required String? error,
@@ -418,7 +419,7 @@ extension _HomeTabSearchResultsUI on _HomeTabState {
     if (sortedTracks.isNotEmpty) {
       _historySnapshot.update(sortedTracks);
       final historyLookups = _historySnapshot.lookups;
-      final existingHistoryKeys = ref.watch(
+      final existingHistoryKeys = resultsRef.watch(
         downloadHistoryVisibleBatchExistsProvider(_historySnapshot.request),
       );
       slivers.addAll(
@@ -540,6 +541,7 @@ extension _HomeTabSearchResultsUI on _HomeTabState {
               return Padding(
                 padding: const EdgeInsets.symmetric(horizontal: 16),
                 child: MornyeGlassPanel.overlay(
+                  blurEnabled: false,
                   radius: 24,
                   firstInGroup: isFirst,
                   lastInGroup: isLast,

lib/screens/home_tab_widgets.dart

@@ -219,9 +219,9 @@ class _TrackItemWithStatus extends ConsumerWidget {
   Widget build(BuildContext context, WidgetRef ref) {
     final colorScheme = Theme.of(context).colorScheme;
 
-    final queueItem = ref.watch(
+    final isQueued = ref.watch(
       downloadQueueLookupProvider.select(
-        (lookup) => lookup.byTrackId[track.id],
+        (lookup) => lookup.byTrackId.containsKey(track.id),
       ),
     );
 
@@ -249,7 +249,6 @@ class _TrackItemWithStatus extends ConsumerWidget {
       thumbHeight = thumbSize.$2;
     }
 
-    final isQueued = queueItem != null;
     final hasCover = track.coverUrl?.isNotEmpty == true;
 
     return Column(

lib/widgets/mornye_chrome.dart

@@ -131,6 +131,7 @@ class MornyeGlassPanel extends ConsumerWidget {
     this.strongTint = false,
     this.tintOpacity,
     this.liquidGlass = false,
+    this.blurEnabled = true,
   });
 
   /// Shared glass material for confirmation dialogs and floating sheets.
@@ -142,6 +143,7 @@ class MornyeGlassPanel extends ConsumerWidget {
     this.lastInGroup = true,
     this.tintOpacity = 0.78,
     this.liquidGlass = false,
+    this.blurEnabled = true,
   }) : strongTint = false;
 
   final Widget child;
@@ -152,9 +154,13 @@ class MornyeGlassPanel extends ConsumerWidget {
   final double? tintOpacity;
   final bool liquidGlass;
 
+  /// Disable backdrop sampling for surfaces that scroll over a plain page.
+  final bool blurEnabled;
+
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final blur =
+        blurEnabled &&
         !MediaQuery.highContrastOf(context) &&
         (!ref.watch(lowEndDeviceProvider) ||
             ref.watch(backdropBlurEnabledProvider));