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>

frontend/src/pages/auth/LoginPage.tsx

@@ -38,8 +38,11 @@ export function LoginPage() {
     try {
       const { data } = await api.post('/auth/login', values);
       setAuth(data.accessToken, data.user, data.organizations);
-      // Always go through org selection to ensure correct JWT with orgSchema
-      if (data.organizations.length >= 1) {
+      // Platform owner / superadmin with no orgs → admin panel
+      if (data.user?.isSuperadmin && data.organizations.length === 0) {
+        navigate('/admin');
+      } else if (data.organizations.length >= 1) {
+        // Always go through org selection to ensure correct JWT with orgSchema
         navigate('/select-org');
       } else {
         navigate('/');