UX: Authenticated nav items (Dashboard, Invoices, Escrow) visible to unauthenticated users

[Danieliushka]

Description

The navigation bar shows Dashboard, Invoices, Escrow, and Wallet links to all visitors, even when not logged in. These pages likely require authentication, creating a confusing experience.

Steps to Reproduce

1. Open https://coinpayportal.com in incognito/new browser (no session)
2. Observe the top navigation bar

Expected

• Unauthenticated users see: Home, Pricing, API Docs, Reputation, x402, Login/Sign Up
• Dashboard, Invoices, Escrow, Wallet should only appear after login

Actual

• Nav shows: Dashboard, Invoices, Escrow, Wallet, API, Reputation, x402
• Clicking these as an unauthenticated user leads to pages that may not function properly
• No visible Login/Sign Up button in the main nav (only accessible via /signup or /login URLs)

Additional Issue

There is no prominent 'Login' or 'Sign Up' CTA button in the navigation header. The header shows a mysterious 'M' button instead. This hurts conversion — new visitors have no obvious way to sign up from the nav.

[ralyodio]

they are redirecting to login except for x402. i 'll fix