feat(mobile): Allow users to set album cover from mobile app (#25515)

* set album cover from asset

* add to correct kebab group

* add to album selection

* add to legacy control bottom bar

* add tests

* format

* analyze

* Revert "add to legacy control bottom bar"

This reverts commit 9d68e12a08.

* remove unnecessary event emission

* lint

* fix tests

* fix: button order and remove unncessary check

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/lib/utils/action_button.utils.dart

@@ -20,6 +20,7 @@ import 'package:immich_mobile/presentation/widgets/action_buttons/like_activity_
 import 'package:immich_mobile/presentation/widgets/action_buttons/move_to_lock_folder_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/remove_from_album_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/remove_from_lock_folder_action_button.widget.dart';
+import 'package:immich_mobile/presentation/widgets/action_buttons/set_album_cover.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/share_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/share_link_action_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/similar_photos_action_button.widget.dart';
@@ -42,6 +43,7 @@ class ActionButtonContext {
   final bool isCasting;
   final TimelineOrigin timelineOrigin;
   final ThemeData? originalTheme;
+  final int selectedCount;
 
   const ActionButtonContext({
     required this.asset,
@@ -56,6 +58,7 @@ class ActionButtonContext {
     this.isCasting = false,
     this.timelineOrigin = TimelineOrigin.main,
     this.originalTheme,
+    this.selectedCount = 1,
   });
 }
 
@@ -65,6 +68,7 @@ enum ActionButtonType {
   share,
   shareLink,
   cast,
+  setAlbumCover,
   similarPhotos,
   viewInTimeline,
   download,
@@ -134,6 +138,11 @@ enum ActionButtonType {
         context.isOwner && //
             !context.isInLockedView && //
             context.currentAlbum != null,
+      ActionButtonType.setAlbumCover =>
+        context.isOwner && //
+            !context.isInLockedView && //
+            context.currentAlbum != null && //
+            context.selectedCount == 1,
       ActionButtonType.unstack =>
         context.isOwner && //
             !context.isInLockedView && //
@@ -213,6 +222,12 @@ enum ActionButtonType {
         iconOnly: iconOnly,
         menuItem: menuItem,
       ),
+      ActionButtonType.setAlbumCover => SetAlbumCoverActionButton(
+        albumId: context.currentAlbum!.id,
+        source: context.source,
+        iconOnly: iconOnly,
+        menuItem: menuItem,
+      ),
       ActionButtonType.likeActivity => LikeActivityActionButton(iconOnly: iconOnly, menuItem: menuItem),
       ActionButtonType.unstack => UnStackActionButton(source: context.source, iconOnly: iconOnly, menuItem: menuItem),
       ActionButtonType.similarPhotos => SimilarPhotosActionButton(
@@ -251,7 +266,7 @@ enum ActionButtonType {
   int get kebabMenuGroup => switch (this) {
     // 0: info
     ActionButtonType.openInfo => 0,
-    // 10: move,remove, and delete
+    // 10: move, remove, and delete
     ActionButtonType.trash => 10,
     ActionButtonType.deletePermanent => 10,
     ActionButtonType.removeFromLockFolder => 10,