Initial commit for teams module

lib/models/team.dart

@@ -0,0 +1,39 @@
+// Extension to add members property to Team
+import '../models/team_member.dart';
+
+extension TeamMembersExtension on Team {
+  List<String> members(List<TeamMember> allMembers) {
+    return allMembers
+        .where((m) => m.teamId == id)
+        .map((m) => m.userId)
+        .toList();
+  }
+}
+
+class Team {
+  Team({
+    required this.id,
+    required this.name,
+    required this.leaderId,
+    required this.officeIds,
+    required this.createdAt,
+  });
+
+  final String id;
+  final String name;
+  final String leaderId;
+  final List<String> officeIds;
+  final DateTime createdAt;
+
+  factory Team.fromMap(Map<String, dynamic> map) {
+    return Team(
+      id: map['id'] as String,
+      name: map['name'] as String? ?? '',
+      leaderId: map['leader_id'] as String? ?? '',
+      officeIds:
+          (map['office_ids'] as List?)?.map((e) => e.toString()).toList() ??
+          <String>[],
+      createdAt: DateTime.parse(map['created_at'] as String),
+    );
+  }
+}