Simplify demo section to focus on developer patterns

- Renamed 'Checkout Demo' to 'Reference Implementations'
- Split into two subsections: Checkout Demo and Easy Invoice
- Removed detailed wallet counts (distracting from main point)
- Reframed as 'what you can build' examples for developers
- Emphasized different patterns: widget integration vs full app vs multi-tenant

Author: MantisClone

use-cases/checkout.mdx

@@ -36,31 +36,26 @@ Unlike traditional crypto payments where customers send funds and you manually m
   </Step>
 </Steps>
 
-## Checkout Demo
+## Reference Implementations
 
-Try the checkout payment flow with our interactive demo:
+### Checkout Demo - Payment Widget Integration
+See the Payment Widget in action in a mock e-commerce store: [checkout.request.network](https://checkout.request.network)
 
-<Card 
-  title="Try Checkout Demo" 
-  href="https://checkout.request.network" 
-  icon="external-link"
->
-  Add items to cart, connect wallet, and complete a crypto payment - all powered by Request Network API
-</Card>
+**What it demonstrates:**
+- **Demo Tab**: Customer checkout flow with shopping cart
+- **Playground Tab**: Interactive widget configuration tool
+- Real-time payment processing across multiple currencies and chains
 
-**What you'll see:**
-- **Demo Tab**: Mock e-commerce store with shopping cart and checkout
-- **Playground Tab**: Interactive Payment Widget configuration tool
-- Multi-wallet support (6 wallets: Injected, Coinbase, MetaMask, Safe, WalletConnect, plus 400+ more via WalletConnect)
-- Real-time payment processing
-- Multiple currencies and chains
+### Easy Invoice - Full Application Example
+See a complete merchant dashboard built with Request Network APIs: [easyinvoice.request.network](https://easyinvoice.request.network)
 
-<Info>
-**Note:** EasyInvoice uses WalletConnect by Reown and supports 490+ wallets. The Payment Widget (used in this demo) uses Wagmi and supports a smaller subset focused on popular wallets.
-</Info>
+**What it demonstrates:**
+- E-commerce sales dashboard and transaction history
+- Multi-tenant platform with Client ID management for sub-merchants
+- Open-source reference you can fork and customize
 
 <Check>
-**Ready to integrate?** The demo uses the Payment Widget Button component. For custom checkout flows, explore integration options below.
+**Ready to integrate?** Choose an integration approach below based on your technical requirements.
 </Check>
 
 ## Integration Approaches