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/ipns/page.tsx

@@ -2,6 +2,7 @@
 
 import { useState, useEffect, useCallback } from 'react';
 import { listIPNSKeys, ipnsPublish, ipnsResolve, ipnsGenKey, type IPNSKey } from '@/lib/api';
+import PortalLayout from '@/app/layout-portal';
 import { RefreshCw, ExternalLink, Key, FileText, Plus } from 'lucide-react';
 
 type Status = 'idle' | 'loading' | 'success' | 'error';
@@ -93,11 +94,11 @@ export default function IPNSPage() {
   };
 
   return (
-    <div className="space-y-6 max-w-4xl">
+    <PortalLayout>
       {/* Header */}
-      <div className="flex items-center justify-between">
+      <div className="flex items-center justify-between mb-6">
         <div>
-          <h1 className="text-xl font-bold text-white">IPNS</h1>
+          <h1 className="text-2xl font-bold text-white">IPNS</h1>
           <p className="text-sm text-surface-400 mt-0.5">
             InterPlanetary Name System — human-readable names for IPFS content
           </p>
@@ -280,6 +281,6 @@ export default function IPNSPage() {
           )}
         </section>
       </div>
-    </div>
+    </PortalLayout>
   );
 }