fix(6): fix process monitoring - keep servers running indefinitely

- Replace wait with infinite monitoring loop
- Detect and warn if processes die instead of killing them
- Allows independent process failures without terminating script
- Trap still catches Ctrl-C to graceful shutdown

start_server.sh

@@ -225,8 +225,16 @@ echo "  kill $BACKEND_PID $FRONTEND_PID"
 echo ""
 log_success "Servers are running!"
 
-# Keep script running and handle signals
+# Keep script running indefinitely and handle signals
 trap "log_info 'Received interrupt signal'; kill $BACKEND_PID $FRONTEND_PID 2>/dev/null || true; exit 0" SIGINT SIGTERM
 
-# Wait for both processes
-wait
+# Monitor processes - restart if they crash
+while true; do
+  if ! kill -0 $BACKEND_PID 2>/dev/null; then
+    log_warn "Backend process died (PID $BACKEND_PID), monitoring stopped"
+  fi
+  if ! kill -0 $FRONTEND_PID 2>/dev/null; then
+    log_warn "Frontend process died (PID $FRONTEND_PID), monitoring stopped"
+  fi
+  sleep 5
+done