fix: dynamic backend address based on frontend address

scripts/test-network.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Get the LAN IP address
+LAN_IP=$(ifconfig | grep -E "inet.*broadcast" | awk '{print $2}' | head -1)
+
+echo "=== Stamp Network Configuration Test ==="
+echo "Your MacBook's LAN IP: $LAN_IP"
+echo ""
+echo "Access URLs:"
+echo "  Local access:  http://localhost:4000"
+echo "  LAN access:    http://$LAN_IP:4000"
+echo ""
+echo "Backend API URLs (auto-detected by frontend):"
+echo "  From localhost: http://localhost:8000"
+echo "  From LAN:       http://$LAN_IP:8000"
+echo ""
+echo "Testing API endpoints..."
+
+# Test local backend
+echo -n "Testing localhost backend... "
+if curl -s http://localhost:8000/ > /dev/null; then
+    echo "✅ OK"
+else
+    echo "❌ Failed"
+fi
+
+# Test LAN backend
+echo -n "Testing LAN backend... "
+if curl -s http://$LAN_IP:8000/ > /dev/null; then
+    echo "✅ OK"
+else
+    echo "❌ Failed"
+fi
+
+echo ""
+echo "To test from other devices:"
+echo "1. Make sure your device is on the same network"
+echo "2. Open http://$LAN_IP:4000 in a browser"
+echo "3. The frontend will automatically use http://$LAN_IP:8000 for API calls"