SIWE auth, API proxy fixes, dashboard, login, usage pages

- SIWE auth flow: challenge/login/logout/me API routes + JWT middleware
- Fixed [...path] catch-all: Kubo proxy with matchRoute() + mapToKuboAPI()
- Fixed session_id → nonce field mismatch in AuthProvider
- Fixed dashboard pins crash: Kubo returns {Keys: {...}}, not array
- Added middleware route guard (307 redirect to /login)
- Added login, register, profile, usage, upload pages
- Added dashboard components (StorageGauge, FreeTierProgress)
- Added SWR hooks + AuthGuard + Providers + Toast/ErrorBoundary
- Added payment integration (smart contract ABI, tiers, tokens)
- Fixed IPNS key listing: Name/Id → name/id mapping
- Added PWA support (manifest, service worker, icons)
- Added tests for helpers, limits, search-index, wallet

src/app/layout.tsx

@@ -1,21 +1,28 @@
 import type { Metadata, Viewport } from 'next';
 import './globals.css';
+import Providers from '@/components/Providers';
+import SWRegister from '@/components/SWRegister';
 
 export const metadata: Metadata = {
   title: 'MAOS IPFS Portal',
   description: 'Decentralized storage management for your IPFS node',
+  manifest: '/manifest.json',
+  icons: { icon: '/favicon.svg' },
 };
 
 export const viewport: Viewport = {
   width: 'device-width',
   initialScale: 1,
-  themeColor: '#020617',
+  themeColor: '#0891b2',
 };
 
 export default function RootLayout({ children }: { children: React.ReactNode }) {
   return (
-    <html lang="en" className="dark">
-      <body className="min-h-screen antialiased">{children}</body>
+    <html lang="en" className="dark" suppressHydrationWarning>
+      <body className="min-h-screen antialiased">
+        <SWRegister />
+        <Providers>{children}</Providers>
+      </body>
     </html>
   );
 }