feat(mobile): shared album activities (#4833)

* fix(server): global activity like duplicate search

* mobile: user_circle_avatar - fallback to text icon if no profile pic available

* mobile: use favourite icon in search "your activity"

* feat(mobile): shared album activities

* mobile: align hearts with user profile icon

* styling

* replace bottom sheet with dismissible

* add auto focus to the input

---------

Co-authored-by: shalong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>
Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/lib/modules/activities/models/activity.model.dart

@@ -0,0 +1,90 @@
+import 'package:immich_mobile/shared/models/user.dart';
+import 'package:openapi/api.dart';
+
+enum ActivityType { comment, like }
+
+class Activity {
+  final String id;
+  final String? assetId;
+  final String? comment;
+  final DateTime createdAt;
+  final ActivityType type;
+  final User user;
+
+  const Activity({
+    required this.id,
+    this.assetId,
+    this.comment,
+    required this.createdAt,
+    required this.type,
+    required this.user,
+  });
+
+  Activity copyWith({
+    String? id,
+    String? assetId,
+    String? comment,
+    DateTime? createdAt,
+    ActivityType? type,
+    User? user,
+  }) {
+    return Activity(
+      id: id ?? this.id,
+      assetId: assetId ?? this.assetId,
+      comment: comment ?? this.comment,
+      createdAt: createdAt ?? this.createdAt,
+      type: type ?? this.type,
+      user: user ?? this.user,
+    );
+  }
+
+  Activity.fromDto(ActivityResponseDto dto)
+      : id = dto.id,
+        assetId = dto.assetId,
+        comment = dto.comment,
+        createdAt = dto.createdAt,
+        type = dto.type == ActivityResponseDtoTypeEnum.comment
+            ? ActivityType.comment
+            : ActivityType.like,
+        user = User(
+          email: dto.user.email,
+          firstName: dto.user.firstName,
+          lastName: dto.user.lastName,
+          profileImagePath: dto.user.profileImagePath,
+          id: dto.user.id,
+          // Placeholder values
+          isAdmin: false,
+          updatedAt: DateTime.now(),
+          isPartnerSharedBy: false,
+          isPartnerSharedWith: false,
+          memoryEnabled: false,
+        );
+
+  @override
+  String toString() {
+    return 'Activity(id: $id, assetId: $assetId, comment: $comment, createdAt: $createdAt, type: $type, user: $user)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+
+    return other is Activity &&
+        other.id == id &&
+        other.assetId == assetId &&
+        other.comment == comment &&
+        other.createdAt == createdAt &&
+        other.type == type &&
+        other.user == user;
+  }
+
+  @override
+  int get hashCode {
+    return id.hashCode ^
+        assetId.hashCode ^
+        comment.hashCode ^
+        createdAt.hashCode ^
+        type.hashCode ^
+        user.hashCode;
+  }
+}