Add HTTPS configuration management system

- Add HTTPSConfig model for managing HTTPS settings
- Add admin routes for HTTPS configuration management
- Add beautiful admin template for HTTPS configuration
- Add database migration for https_config table
- Add CLI utility for HTTPS management
- Add setup script for automated configuration
- Add Caddy configuration generator and manager
- Add comprehensive documentation (3 guides)
- Add HTTPS Configuration card to admin dashboard
- Implement input validation and security features
- Add admin-only access control with audit trail
- Add real-time configuration preview
- Integrate with existing Caddy reverse proxy

Features:
- Enable/disable HTTPS from web interface
- Configure domain, hostname, IP address, port
- Automatic SSL certificate management via Let's Encrypt
- Real-time Caddyfile generation and reload
- Full audit trail with admin username and timestamps
- Support for HTTPS and HTTP fallback access points
- Beautiful, mobile-responsive UI

Modified files:
- app/models/__init__.py (added HTTPSConfig import)
- app/blueprints/admin.py (added HTTPS routes)
- app/templates/admin/admin.html (added HTTPS card)
- docker-compose.yml (added Caddyfile mount and admin port)

New files:
- app/models/https_config.py
- app/blueprints/https_config.html
- app/utils/caddy_manager.py
- https_manager.py
- setup_https.sh
- migrations/add_https_config_table.py
- migrations/add_email_to_https_config.py
- HTTPS_STATUS.txt
- Documentation files (3 markdown guides)

app/templates/admin/admin.html

@@ -105,6 +105,17 @@
             </a>
         </div>
     </div>
+
+    <!-- HTTPS Configuration Card (Admin Only) -->
+    <div class="card management-card" style="background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);">
+        <h2>🔒 HTTPS Configuration</h2>
+        <p>Manage SSL/HTTPS settings, domain, and access points</p>
+        <div class="card-actions">
+            <a href="{{ url_for('admin.https_config') }}" class="btn btn-primary">
+                Configure HTTPS
+            </a>
+        </div>
+    </div>
     {% endif %}
 
     <!-- Quick Actions Card -->