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/api/auth/me/route.ts

@@ -0,0 +1,31 @@
+/* ── GET /api/auth/me ──
+ *
+ * Checkt huidige sessie op basis van httpOnly cookie.
+ * Geeft wallet address en role terug.
+ */
+
+import { cookies } from 'next/headers';
+import { NextResponse } from 'next/server';
+import { verifySessionJWT, SESSION_COOKIE } from '@/lib/auth-server';
+
+export const dynamic = 'force-dynamic';
+
+export async function GET() {
+  const cookieStore = await cookies();
+  const token = cookieStore.get(SESSION_COOKIE)?.value;
+
+  if (!token) {
+    return NextResponse.json({ authenticated: false }, { status: 401 });
+  }
+
+  const session = await verifySessionJWT(token);
+  if (!session) {
+    return NextResponse.json({ authenticated: false }, { status: 401 });
+  }
+
+  return NextResponse.json({
+    authenticated: true,
+    address: session.address,
+    role: session.role,
+  });
+}