feat: production-ready dashboard with proper auth persistence

- Add dashboard UI showing connection status, webhooks, and email config
- Fix FileAPL to use fileName param for persistent /data volume storage
- Configure production domains and webhooks
- Add dev tunnel script for local testing
- Update Dockerfile and build config for K3s deployment

The app is now successfully installed and running at:
https://core-extensions.manoonoils.com

scripts/dev-tunnel.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Start local dev server with tunnel for rapid Saleor app development
+
+echo "🚀 Starting Saleor Core Extensions with tunnel..."
+echo ""
+
+# Check if localtunnel is installed
+if ! command -v lt &> /dev/null; then
+    echo "❌ localtunnel not found. Installing..."
+    npm install -g localtunnel
+fi
+
+# Start localtunnel in background and capture URL
+lt --port 3000 --print-requests &
+TUNNEL_PID=$!
+
+# Wait for tunnel to establish
+sleep 3
+
+# Get the tunnel URL (this is a simple approach, in reality we'd parse the output)
+echo ""
+echo "⏳ Waiting for tunnel to start..."
+sleep 2
+
+echo ""
+echo "✅ Tunnel started!"
+echo ""
+echo "📝 Use this URL in Saleor Dashboard:"
+echo "   https://YOUR_TUNNEL_URL.loca.lt/api/manifest"
+echo ""
+echo "🔧 Starting Next.js dev server..."
+echo ""
+
+# Kill tunnel on exit
+trap "kill $TUNNEL_PID 2>/dev/null; exit" INT TERM EXIT
+
+# Start dev server
+npm run dev