deps(mobile): flutter 3.16 (#6677)

* dep(mobile): update flutter and deps

* chore: dart analyzer

* chore: update flutter workflow version

* chore: dart format

* fix: gallery_viewer PopScope

---------

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

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

@@ -4,10 +4,10 @@ import 'package:immich_mobile/extensions/build_context_extensions.dart';
 
 class DisableMultiSelectButton extends ConsumerWidget {
   const DisableMultiSelectButton({
-    Key? key,
+    super.key,
     required this.onPressed,
     required this.selectedItemCount,
-  }) : super(key: key);
+  });
 
   final Function onPressed;
   final int selectedItemCount;

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

@@ -57,7 +57,7 @@ class DraggableScrollbar extends StatefulWidget {
   final Function(bool scrolling) scrollStateListener;
 
   DraggableScrollbar.semicircle({
-    Key? key,
+    super.key,
     Key? scrollThumbKey,
     this.alwaysVisibleScrollThumb = false,
     required this.child,
@@ -76,8 +76,7 @@ class DraggableScrollbar extends StatefulWidget {
           heightScrollThumb * 0.6,
           scrollThumbKey,
           alwaysVisibleScrollThumb,
-        ),
-        super(key: key);
+        );
 
   @override
   DraggableScrollbarState createState() => DraggableScrollbarState();
@@ -170,12 +169,12 @@ class ScrollLabel extends StatelessWidget {
       BoxConstraints.tightFor(width: 72.0, height: 28.0);
 
   const ScrollLabel({
-    Key? key,
+    super.key,
     required this.child,
     required this.animation,
     required this.backgroundColor,
     this.constraints = _defaultConstraints,
-  }) : super(key: key);
+  });
 
   @override
   Widget build(BuildContext context) {
@@ -509,10 +508,10 @@ class SlideFadeTransition extends StatelessWidget {
   final Widget child;
 
   const SlideFadeTransition({
-    Key? key,
+    super.key,
     required this.animation,
     required this.child,
-  }) : super(key: key);
+  });
 
   @override
   Widget build(BuildContext context) {

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

@@ -9,13 +9,13 @@ import 'package:immich_mobile/modules/settings/services/app_settings.service.dar
 
 class GroupDividerTitle extends HookConsumerWidget {
   const GroupDividerTitle({
-    Key? key,
+    super.key,
     required this.text,
     required this.multiselectEnabled,
     required this.onSelect,
     required this.onDeselect,
     required this.selected,
-  }) : super(key: key);
+  });
 
   final String text;
   final bool multiselectEnabled;

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

@@ -389,15 +389,6 @@ class ImmichAssetGridViewState extends State<ImmichAssetGridView> {
     }
   }
 
-  Future<bool> onWillPop() async {
-    if (widget.selectionActive && _selectedAssets.isNotEmpty) {
-      _deselectAll();
-      return false;
-    }
-
-    return true;
-  }
-
   @override
   void initState() {
     super.initState();
@@ -438,8 +429,9 @@ class ImmichAssetGridViewState extends State<ImmichAssetGridView> {
 
   @override
   Widget build(BuildContext context) {
-    return WillPopScope(
-      onWillPop: onWillPop,
+    return PopScope(
+      canPop: !(widget.selectionActive && _selectedAssets.isNotEmpty),
+      onPopInvoked: (didPop) => !didPop ? _deselectAll() : null,
       child: Stack(
         children: [
           _buildAssetGrid(),

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

@@ -23,7 +23,7 @@ class ThumbnailImage extends StatelessWidget {
   final int heroOffset;
 
   const ThumbnailImage({
-    Key? key,
+    super.key,
     required this.asset,
     required this.index,
     required this.loadAsset,
@@ -36,7 +36,7 @@ class ThumbnailImage extends StatelessWidget {
     this.onDeselect,
     this.onSelect,
     this.heroOffset = 0,
-  }) : super(key: key);
+  });
 
   @override
   Widget build(BuildContext context) {