Replaced all inline error messages with the standardized `api_error` helper for consistent error response formatting. This improves clarity, maintainability, and ensures uniform error structures across the application. Updated logging for collector failures to include error class and switched to warning level for target unreachable scenarios.
Replaced the fixed `alert_recipients` list with customizable subject and body templates for alerts and warnings. This allows for more flexible and dynamic email notifications using placeholder variables. Updated relevant backend and frontend components to support this feature.
Introduced a new optional "from_name" attribute to email settings, allowing customization of the sender's display name in outgoing emails. Updated backend models, APIs, and front-end components to include and handle this field properly. This enhances email clarity and personalization for users.
Implemented backend and frontend support for managing SMTP settings for email notifications. Includes API endpoints, database migration, and UI integration for configuring and testing email alerts.
