fix: propagate Settings config changes to service managers and live pages

- PUT /api/config now calls service_manager.update_config() for each service
  so changes write to the service's own config file, not just cell_config.json
- email_manager.get_status() now reads smtp_port/imap_port/domain from its
  config file (defaults: 587/993/cell.local) and includes them in the response
- calendar_manager.get_status() includes configured port (default 5232)
- file_manager.get_status() uses configured port from service config
- Email.jsx reads imap_port/smtp_port from API status instead of hardcoding
- Settings service sections show "port changes require container restart" note

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

api/app.py

@@ -403,15 +403,29 @@ def update_config():
             config_manager.configs['_identity'] = stored
             config_manager._save_all_configs()
 
-        # Update service configurations
+        # Map service names to their manager instances
+        _svc_managers = {
+            'network': network_manager,
+            'wireguard': wireguard_manager,
+            'email': email_manager,
+            'calendar': calendar_manager,
+            'files': file_manager,
+            'routing': routing_manager,
+            'vault': app.vault_manager,
+        }
+
+        # Update service configurations in both config_manager and service managers
         for service, config in data.items():
             if service in config_manager.service_schemas:
-                success = config_manager.update_service_config(service, config)
-                if success:
-                    service_bus.publish_event(EventType.CONFIG_CHANGED, service, {
-                        'service': service,
-                        'config': config
-                    })
+                config_manager.update_service_config(service, config)
+                # Propagate to the service manager's own config file
+                mgr = _svc_managers.get(service)
+                if mgr:
+                    mgr.update_config(config)
+                service_bus.publish_event(EventType.CONFIG_CHANGED, service, {
+                    'service': service,
+                    'config': config
+                })
 
         logger.info(f"Updated config: {data}")
         return jsonify({"message": "Configuration updated successfully"})