fix(mobile): Empty albums don't show title (#3576)

mobile/lib/modules/home/ui/asset_grid/immich_asset_grid_view.dart

@@ -248,8 +248,6 @@ class ImmichAssetGridViewState extends State<ImmichAssetGridView> {
           key: ValueKey(section.offset),
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
-            if (section.offset == 0 && widget.topWidget != null)
-              widget.topWidget!,
             if (section.type == RenderAssetGridElementType.monthTitle)
               _buildMonthTitle(context, section.date),
             if (section.type == RenderAssetGridElementType.groupDividerTitle ||
@@ -289,7 +287,15 @@ class ImmichAssetGridViewState extends State<ImmichAssetGridView> {
   }
 
   Widget _itemBuilder(BuildContext c, int position) {
-    final item = widget.renderList.elements[position];
+    int index = position;
+    if (widget.topWidget != null) {
+      if (index == 0) {
+        return widget.topWidget!;
+      }
+      index--;
+    }
+
+    final item = widget.renderList.elements[index];
     return _buildSection(c, item, _scrolling);
   }
 
@@ -329,7 +335,7 @@ class ImmichAssetGridViewState extends State<ImmichAssetGridView> {
       itemBuilder: _itemBuilder,
       itemPositionsListener: _itemPositionsListener,
       itemScrollController: _itemScrollController,
-      itemCount: widget.renderList.elements.length,
+      itemCount: widget.renderList.elements.length + (widget.topWidget != null ? 1 : 0),
       addRepaintBoundaries: true,
     );