[CORE] Initial project scaffold - NIS2 Agile Compliance Platform

Complete MVP implementation including:
- PHP 8.4 backend with Front Controller pattern (80+ API endpoints)
- Multi-tenant architecture with organization_id isolation
- JWT authentication (HS256, 2h access + 7d refresh tokens)
- 14 controllers: Auth, Organization, Assessment, Dashboard, Risk,
  Incident, Policy, SupplyChain, Training, Asset, Audit, Admin
- AI Service integration (Anthropic Claude API) for gap analysis,
  risk suggestions, policy generation, incident classification
- NIS2 gap analysis questionnaire (~80 questions, 10 categories)
- MySQL schema (20 tables) with NIS2 Art. 21 compliance controls
- NIS2 Art. 23 incident reporting workflow (24h/72h/30d)
- Frontend: login, register, dashboard, assessment wizard, org setup
- Docker configuration (PHP-FPM + Nginx + MySQL)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

application/controllers/AdminController.php

@@ -0,0 +1,71 @@
+<?php
+/**
+ * NIS2 Agile - Admin Controller
+ *
+ * Gestione piattaforma (solo super_admin).
+ */
+
+require_once __DIR__ . '/BaseController.php';
+
+class AdminController extends BaseController
+{
+    public function listOrganizations(): void
+    {
+        $this->requireSuperAdmin();
+        $pagination = $this->getPagination();
+
+        $total = Database::count('organizations', '1=1');
+        $orgs = Database::fetchAll(
+            "SELECT o.*,
+                    (SELECT COUNT(*) FROM user_organizations WHERE organization_id = o.id) as member_count,
+                    (SELECT overall_score FROM assessments WHERE organization_id = o.id AND status = 'completed' ORDER BY completed_at DESC LIMIT 1) as last_score
+             FROM organizations o
+             ORDER BY o.created_at DESC
+             LIMIT {$pagination['per_page']} OFFSET {$pagination['offset']}"
+        );
+
+        $this->jsonPaginated($orgs, $total, $pagination['page'], $pagination['per_page']);
+    }
+
+    public function listUsers(): void
+    {
+        $this->requireSuperAdmin();
+        $pagination = $this->getPagination();
+
+        $total = Database::count('users', '1=1');
+        $users = Database::fetchAll(
+            "SELECT u.id, u.email, u.full_name, u.role, u.is_active, u.last_login_at, u.created_at,
+                    GROUP_CONCAT(o.name) as organizations
+             FROM users u
+             LEFT JOIN user_organizations uo ON uo.user_id = u.id
+             LEFT JOIN organizations o ON o.id = uo.organization_id
+             GROUP BY u.id
+             ORDER BY u.created_at DESC
+             LIMIT {$pagination['per_page']} OFFSET {$pagination['offset']}"
+        );
+
+        $this->jsonPaginated($users, $total, $pagination['page'], $pagination['per_page']);
+    }
+
+    public function platformStats(): void
+    {
+        $this->requireSuperAdmin();
+
+        $this->jsonSuccess([
+            'total_organizations' => Database::count('organizations', '1=1'),
+            'active_organizations' => Database::count('organizations', 'is_active = 1'),
+            'total_users'         => Database::count('users', '1=1'),
+            'active_users'        => Database::count('users', 'is_active = 1'),
+            'total_assessments'   => Database::count('assessments', '1=1'),
+            'completed_assessments' => Database::count('assessments', 'status = "completed"'),
+            'total_incidents'     => Database::count('incidents', '1=1'),
+            'open_incidents'      => Database::count('incidents', 'status NOT IN ("closed", "post_mortem")'),
+            'total_risks'         => Database::count('risks', '1=1'),
+            'total_policies'      => Database::count('policies', '1=1'),
+            'ai_interactions'     => Database::count('ai_interactions', '1=1'),
+            'plans_distribution'  => Database::fetchAll(
+                'SELECT subscription_plan, COUNT(*) as count FROM organizations GROUP BY subscription_plan'
+            ),
+        ]);
+    }
+}