fix(auth): migrate tokens from localStorage to httpOnly cookies + CSRF hardening

Backend:
- Auth controller sets httpOnly secure cookies (access_token, refresh_token, goodgo_authenticated) on login/register/refresh
- JWT strategy reads token from cookie first, falls back to Authorization header
- Added POST /auth/logout to clear auth cookies
- Added POST /auth/exchange-token for OAuth callback token-to-cookie exchange
- Refresh endpoint reads refresh_token from cookie (body fallback for backwards compat)
- CSRF middleware excludes auth endpoints (login, register, refresh, exchange-token, logout)

Frontend:
- Removed all localStorage token storage (goodgo_tokens key)
- Removed authGet/authPost/authPatch helpers from api-client (tokens sent via cookies)
- All API calls use credentials:'include' for cookie-based auth
- Updated auth-store: no more token state, uses isAuthenticated flag from cookie
- Updated admin-api, listings-api to remove explicit token parameters
- Updated all pages (admin dashboard, users, KYC, moderation, listings) to remove token passing
- OAuth callbacks use exchange-token endpoint to convert URL tokens to cookies
- Auth provider simplified (no client-side cookie management needed)

Security improvements:
- JWT no longer accessible via JavaScript (XSS-safe)
- Refresh token scoped to /auth path only
- Server-side goodgo_authenticated cookie with SameSite=Lax
- Access token cookie with SameSite=Strict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/app/(dashboard)/listings/page.tsx

@@ -15,8 +15,6 @@ import {
   type PaginatedResult,
 } from '@/lib/listings-api';
 import { PROPERTY_TYPES, TRANSACTION_TYPES, LISTING_STATUSES } from '@/lib/validations/listings';
-import { useAuthStore } from '@/lib/auth-store';
-
 function formatPrice(priceVND: string): string {
   const num = Number(priceVND);
   if (num >= 1_000_000_000) return `${(num / 1_000_000_000).toFixed(1)} ty`;
@@ -36,7 +34,6 @@ function formatDate(dateStr: string | null): string {
 type ViewMode = 'grid' | 'table';
 
 export default function ListingsPage() {
-  const { tokens } = useAuthStore();
   const [result, setResult] = React.useState<PaginatedResult<ListingDetail> | null>(null);
   const [loading, setLoading] = React.useState(true);
   const [viewMode, setViewMode] = React.useState<ViewMode>('grid');