feat: expanded sliver app bar (#19827)

* use mutex

* feat: cool app bar

* animation

* adapt to more pages

* animation

* better animation

* fix: asset count

* Revert "fix: asset count"

This reverts commit 673a5b264b.

* fix: asset count

* fix: shaky animation on Android

* tunning

* offset SizedBox to fix scroll jump on multiselect

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/presentation/pages/drift_library.page.dart

@@ -27,7 +27,12 @@ class DriftLibraryPage extends ConsumerWidget {
     return const Scaffold(
       body: CustomScrollView(
         slivers: [
-          ImmichSliverAppBar(),
+          ImmichSliverAppBar(
+            snap: false,
+            floating: false,
+            pinned: true,
+            showUploadButton: false,
+          ),
           _ActionButtonGrid(),
           _CollectionCards(),
           _QuickAccessButtonList(),