사용자 활성 세션 조회·종료 API 추가

userfront/lib/features/dashboard/domain/models.dart

@@ -170,3 +170,59 @@ class RpHistoryItem {
     );
   }
 }
+
+class UserSessionSummary {
+  final String sessionId;
+  final DateTime? authenticatedAt;
+  final DateTime? expiresAt;
+  final DateTime? issuedAt;
+  final DateTime? lastSeenAt;
+  final String ipAddress;
+  final String userAgent;
+  final String clientId;
+  final String appName;
+  final bool isCurrent;
+  final bool isActive;
+
+  UserSessionSummary({
+    required this.sessionId,
+    this.authenticatedAt,
+    this.expiresAt,
+    this.issuedAt,
+    this.lastSeenAt,
+    required this.ipAddress,
+    required this.userAgent,
+    required this.clientId,
+    required this.appName,
+    required this.isCurrent,
+    required this.isActive,
+  });
+
+  factory UserSessionSummary.fromJson(Map<String, dynamic> json) {
+    DateTime? parseDate(dynamic raw) {
+      final value = raw?.toString();
+      if (value == null || value.isEmpty) {
+        return null;
+      }
+      try {
+        return DateTime.parse(value).toLocal();
+      } catch (_) {
+        return null;
+      }
+    }
+
+    return UserSessionSummary(
+      sessionId: json['session_id']?.toString() ?? '',
+      authenticatedAt: parseDate(json['authenticated_at']),
+      expiresAt: parseDate(json['expires_at']),
+      issuedAt: parseDate(json['issued_at']),
+      lastSeenAt: parseDate(json['last_seen_at']),
+      ipAddress: json['ip_address']?.toString() ?? '',
+      userAgent: json['user_agent']?.toString() ?? '',
+      clientId: json['client_id']?.toString() ?? '',
+      appName: json['app_name']?.toString() ?? '',
+      isCurrent: json['is_current'] == true,
+      isActive: json['is_active'] != false,
+    );
+  }
+}