Add server-side impersonation session management with full audit
logging, replacing the frontend-only mock. Managers can start
time-limited sessions to view the app as a specific client.
Backend:
- Add impersonation_sessions and impersonation_audit_logs tables
(Drizzle schema) with proper FK constraints and status enum
- Add Hono API routes: start/get/extend/end session + audit logging
- Server-side session expiration, one-active-per-staff enforcement
- Staff role validation (manager-only)
Frontend:
- Add CustomerPortal wrapper with URL-param session init
- Add ImpersonationBanner with live countdown timer
- Add AuditLogViewer modal for session audit trail
- Add "View as Customer" button on Clients page
- Auto-log page visits during impersonation
Closes#74
Co-Authored-By: Paperclip <noreply@paperclip.ing>
Groom Book CEO