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>
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