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/components/PortalHeader.tsx

@@ -2,9 +2,11 @@
 
 import { useEffect, useState } from 'react';
 import { checkHealth } from '@/lib/api';
-import { Shield } from 'lucide-react';
+import { useAuth } from '@/lib/auth';
+import { Shield, LogOut } from 'lucide-react';
 
 export default function PortalHeader() {
+  const { user, logout } = useAuth();
   const [nodeStatus, setNodeStatus] = useState<'online' | 'offline' | 'checking'>('checking');
   const [nodeVersion, setNodeVersion] = useState('');
 
@@ -43,11 +45,22 @@ export default function PortalHeader() {
           </span>
         </div>
 
-        {/* Wallet badge placeholder */}
-        <div className="flex items-center gap-2 px-3 py-1.5 rounded-lg glass text-xs text-surface-300">
-          <Shield className="w-3.5 h-3.5 text-accent-cyan" />
-          Wallet Connected
-        </div>
+        {/* Wallet badge */}
+        {user && (
+          <div className="flex items-center gap-2 pl-3 pr-2 py-1.5 rounded-lg bg-surface-800/50 text-xs">
+            <Shield className="w-3.5 h-3.5 text-accent-cyan" />
+            <span className="text-surface-300 font-mono">
+              {user.address.slice(0, 6)}...{user.address.slice(-4)}
+            </span>
+            <button
+              onClick={logout}
+              className="ml-1 p-1 rounded-md hover:bg-surface-700 text-surface-500 hover:text-accent-rose transition-colors"
+              title="Uitloggen"
+            >
+              <LogOut className="w-3 h-3" />
+            </button>
+          </div>
+        )}
       </div>
     </header>
   );