Seed stores null (not -1) for unlimited quotas on the ENTERPRISE tier.
PlanDto now types these as `number | null`. PricingPage treats null the
same as -1 — both render 'Không giới hạn' instead of 'null tin đăng'.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Implement four new dashboard pages with full UI:
- /dashboard/profile: view/edit profile, agent details, KYC status
- /dashboard/kyc: multi-step KYC document submission flow
- /dashboard/subscription: plan comparison, quota usage, billing history
- /dashboard/payments: transaction history with filters and pagination
Also adds API client modules (profile-api, subscription-api, payment-api)
and updates dashboard navigation with new page links.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
