feat(mobile): add album description functionality (#18886)

* feat(mobile): add album description functionality

- Introduced a new optional `description` field in the `Album` entity.
- Updated `AlbumViewerPageState` to manage `editDescriptionText`.
- Created `AlbumDescription` and `AlbumViewerEditableDescription` widgets for displaying and editing album descriptions.
- Enhanced `CreateAlbumPage` to include a description input field.
- Implemented backend support for updating album descriptions in `AlbumApiRepository` and `AlbumService`.
- Updated sync logic to handle album descriptions during data synchronization.
- Adjusted UI components to accommodate the new description feature.

* fix dart analysis error

* remove comment that shouldn't be there

* Album header styling

* fix: disable edit after album creation

---------

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

mobile/lib/models/albums/album_viewer_page_state.model.dart

@@ -3,18 +3,23 @@ import 'dart:convert';
 class AlbumViewerPageState {
   final bool isEditAlbum;
   final String editTitleText;
+  final String editDescriptionText;
+
   AlbumViewerPageState({
     required this.isEditAlbum,
     required this.editTitleText,
+    required this.editDescriptionText,
   });
 
   AlbumViewerPageState copyWith({
     bool? isEditAlbum,
     String? editTitleText,
+    String? editDescriptionText,
   }) {
     return AlbumViewerPageState(
       isEditAlbum: isEditAlbum ?? this.isEditAlbum,
       editTitleText: editTitleText ?? this.editTitleText,
+      editDescriptionText: editDescriptionText ?? this.editDescriptionText,
     );
   }
 
@@ -23,6 +28,7 @@ class AlbumViewerPageState {
 
     result.addAll({'isEditAlbum': isEditAlbum});
     result.addAll({'editTitleText': editTitleText});
+    result.addAll({'editDescriptionText': editDescriptionText});
 
     return result;
   }
@@ -31,6 +37,7 @@ class AlbumViewerPageState {
     return AlbumViewerPageState(
       isEditAlbum: map['isEditAlbum'] ?? false,
       editTitleText: map['editTitleText'] ?? '',
+      editDescriptionText: map['editDescriptionText'] ?? '',
     );
   }
 
@@ -41,7 +48,7 @@ class AlbumViewerPageState {
 
   @override
   String toString() =>
-      'AlbumViewerPageState(isEditAlbum: $isEditAlbum, editTitleText: $editTitleText)';
+      'AlbumViewerPageState(isEditAlbum: $isEditAlbum, editTitleText: $editTitleText, editDescriptionText: $editDescriptionText)';
 
   @override
   bool operator ==(Object other) {
@@ -49,9 +56,13 @@ class AlbumViewerPageState {
 
     return other is AlbumViewerPageState &&
         other.isEditAlbum == isEditAlbum &&
-        other.editTitleText == editTitleText;
+        other.editTitleText == editTitleText &&
+        other.editDescriptionText == editDescriptionText;
   }
 
   @override
-  int get hashCode => isEditAlbum.hashCode ^ editTitleText.hashCode;
+  int get hashCode =>
+      isEditAlbum.hashCode ^
+      editTitleText.hashCode ^
+      editDescriptionText.hashCode;
 }