docs: Update CHANGELOG and README for deployment models and troubleshooting

- Added multi-platform deployment architecture details (Web App, PWA, DApp) to README.md.
- Included comprehensive troubleshooting guides and fix scripts in README.md.
- Enhanced CHANGELOG.md with new features, fixes, and improvements, including TypeScript error resolutions and updated documentation structure.
- Revised development setup instructions in DEV_SETUP.md to reflect changes in script usage and environment variable setup.

scripts/fix-frontend.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+# Frontend Fix Script
+
+echo -e "\n========================================"
+echo -e "   FRONTEND FIX SCRIPT"
+echo -e "========================================\n"
+
+# Step 1: Stop existing webapp
+echo -e "1. Stopping existing webapp..."
+if lsof -ti:3000 > /dev/null 2>&1; then
+    kill $(lsof -ti:3000) 2>/dev/null
+    echo -e "   ✅ Stopped webapp process"
+    sleep 2
+else
+    echo -e "   ℹ️  No webapp process running on port 3000"
+fi
+
+# Step 2: Clear Next.js cache
+echo -e "\n2. Clearing Next.js cache..."
+cd webapp || exit 1
+if [ -d ".next" ]; then
+    rm -rf .next
+    echo -e "   ✅ Cleared .next cache"
+else
+    echo -e "   ℹ️  No cache to clear"
+fi
+
+# Step 3: Check/Create .env.local
+echo -e "\n3. Checking environment variables..."
+if [ ! -f ".env.local" ]; then
+    cat > .env.local << EOF
+NEXT_PUBLIC_ORCH_URL=http://localhost:8080
+NEXTAUTH_SECRET=dev-secret-change-in-production-min-32-chars
+EOF
+    echo -e "   ✅ Created .env.local"
+else
+    echo -e "   ✅ .env.local exists"
+fi
+
+# Step 4: Verify dependencies
+echo -e "\n4. Checking dependencies..."
+if [ ! -d "node_modules" ]; then
+    echo -e "   ⚠️  node_modules not found. Installing..."
+    npm install
+else
+    echo -e "   ✅ Dependencies installed"
+fi
+
+# Step 5: Start webapp
+echo -e "\n5. Starting webapp..."
+echo -e "   Starting in background..."
+npm run dev &
+WEBAPP_PID=$!
+
+echo -e "\n✅ Webapp starting! (PID: $WEBAPP_PID)"
+echo -e "   Wait 10-15 seconds for Next.js to compile"
+echo -e "   Then open: http://localhost:3000"
+echo -e "   To stop: kill $WEBAPP_PID"
+echo ""
+
+cd ..
+