feat: add subscription service — user auth, Stripe billing, API keys, dashboard

- NextAuth v5 with email+password credentials, JWT sessions
- Registration, login, email verification, password reset flows
- Stripe integration: Free (15/day), Starter ($5/1k/mo), Pro ($20/100k/mo)
- API key management (cb_ prefix) with hash-based validation
- Dashboard with generations history, settings, billing management
- Rate limiting: Redis daily counter (free), DB monthly (paid)
- Generate route auth: Bearer API key + session, anonymous allowed
- Worker userId propagation for generation history
- Pricing section on landing page, auth-aware navbar
- Middleware with route protection, CORS for codeboard.vectry.tech
- Docker env vars for auth, Stripe, email (smtp.migadu.com)

apps/web/src/app/layout.tsx

@@ -3,6 +3,7 @@ import { Inter, JetBrains_Mono } from "next/font/google";
 import "./globals.css";
 import { Navbar } from "@/components/navbar";
 import { Footer } from "@/components/footer";
+import { Providers } from "@/components/providers";
 
 const inter = Inter({
   subsets: ["latin"],
@@ -81,18 +82,20 @@ export default function RootLayout({
         >
           Skip to content
         </a>
-        <div className="relative min-h-screen flex flex-col">
-          <div className="fixed inset-0 bg-gradient-radial pointer-events-none" aria-hidden="true" />
-          <div className="fixed inset-0 bg-grid pointer-events-none opacity-50" aria-hidden="true" />
-          
-          <Navbar />
-          
-          <main id="main-content" className="flex-1 relative">
-            {children}
-          </main>
-          
-          <Footer />
-        </div>
+        <Providers>
+          <div className="relative min-h-screen flex flex-col">
+            <div className="fixed inset-0 bg-gradient-radial pointer-events-none" aria-hidden="true" />
+            <div className="fixed inset-0 bg-grid pointer-events-none opacity-50" aria-hidden="true" />
+            
+            <Navbar />
+            
+            <main id="main-content" className="flex-1 relative">
+              {children}
+            </main>
+            
+            <Footer />
+          </div>
+        </Providers>
       </body>
     </html>
   );