feat: Add presence heartbeat for Matrix online status

- matrix-gateway: POST /internal/matrix/presence/online endpoint
- usePresenceHeartbeat hook with activity tracking
- Auto away after 5 min inactivity
- Offline on page close/visibility change
- Integrated in MatrixChatRoom component

scripts/rollback-mvp-node1.sh

@@ -0,0 +1,81 @@
+#!/bin/bash
+
+# ============================================================================
+# MVP Rollback Script for NODE1
+# ============================================================================
+
+set -e
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+NODE1_IP="144.76.224.179"
+NODE1_USER="root"
+
+echo -e "${RED}⚠️  MVP ROLLBACK SCRIPT${NC}"
+echo ""
+echo "This will:"
+echo "  1. Stop MVP services"
+echo "  2. Remove MVP containers"
+echo "  3. Optionally restore database backup"
+echo ""
+read -p "Continue? (y/n) " -n 1 -r
+echo
+if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+    echo "Rollback cancelled"
+    exit 1
+fi
+
+ssh "$NODE1_USER@$NODE1_IP" << 'ENDSSH'
+    set -e
+    
+    echo "=== NODE1: Stopping MVP services ==="
+    
+    cd /opt/microdao-daarion
+    
+    # Stop services
+    if [[ -f docker-compose.mvp.yml ]]; then
+        docker compose -f docker-compose.mvp.yml down
+        echo "✅ MVP services stopped"
+    else
+        echo "⚠️  docker-compose.mvp.yml not found"
+    fi
+    
+    # Remove containers
+    docker rm -f daarion-agents-service daarion-city-service daarion-secondme-service daarion-microdao-service 2>/dev/null || true
+    echo "✅ MVP containers removed"
+    
+    # List backups
+    echo ""
+    echo "=== Available backups ==="
+    ls -lh /root/backups/daarion_*.sql | tail -5
+    echo ""
+    
+    read -p "Restore database backup? (y/n) " -n 1 -r
+    echo
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+        read -p "Enter backup filename (e.g., daarion_20251125_120000.sql): " BACKUP_FILE
+        
+        if [[ -f "/root/backups/$BACKUP_FILE" ]]; then
+            echo "Restoring backup: $BACKUP_FILE"
+            docker exec -i daarion-postgres psql -U postgres -d daarion < "/root/backups/$BACKUP_FILE"
+            echo "✅ Database restored"
+        else
+            echo "❌ Backup file not found: $BACKUP_FILE"
+        fi
+    fi
+    
+    echo ""
+    echo "=== Rollback complete ==="
+    echo "MVP services have been stopped and removed"
+    echo "Existing DAGI services continue running"
+ENDSSH
+
+echo ""
+echo -e "${GREEN}✅ Rollback completed${NC}"
+echo ""
+echo "Check existing services:"
+echo "  ssh root@$NODE1_IP 'docker ps'"
+