Add comprehensive platform administration panel
- Database: Add login_history, ai_recommendation_log tables; is_platform_owner column on users; subscription fields on organizations (payment_date, confirmation_number, renewal_date) - Backend: New AdminAnalyticsService with platform metrics, tenant detail, and health score calculations (0-100 based on activity, budget, transactions, members, AI usage) - Backend: Login/org-switch now records to login_history; AI recommendations logged to ai_recommendation_log; platform owner protected from superadmin toggle - Frontend: 4-tab admin panel (Dashboard, Organizations, Users, Tenant Health) with tenant detail drawer, subscription management, health scoring visualization - Platform owner account (admin@hoaledgeriq.com) auto-redirects to admin panel - Seed data includes platform owner account and sample login history Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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