feat: implement merchant dashboard, secure auth, and short_id system

- Added dedicated merchant dashboard with analytics and transactions
- Implemented API Key based authentication for merchants
- Introduced 8-character Short IDs for merchants to use in URLs
- Refactored checkout and payment intent APIs to support multi-gateway
- Enhanced Landing Page with Merchant Portal access and marketing copy
- Fixed Next.js 15 async params build issues
- Updated internal branding to P2CGateway
- Added AyrisTech credits to footer

proxy.ts

@@ -0,0 +1,20 @@
+import { type NextRequest } from 'next/server'
+import { updateSession } from '@/utils/supabase/proxy'
+
+export async function proxy(request: NextRequest) {
+    return await updateSession(request)
+}
+
+export const config = {
+    matcher: [
+        /*
+         * Match all request paths except for the ones starting with:
+         * - _next/static (static files)
+         * - _next/image (image optimization files)
+         * - favicon.ico (favicon file)
+         * - public files (images, etc)
+         * Feel free to modify this pattern to include more paths.
+         */
+        '/((?!_next/static|_next/image|favicon.ico|.*\\.(?:svg|png|jpg|jpeg|gif|webp)$).*)',
+    ],
+}