## Changes
- Add basicAuthUser and basicAuthPassword fields to Monitor model, types, and validation (server + client)
- Update networkService to send Authorization: Basic header when credentials are provided
- Add basic auth form fields (username/password) to the create/edit monitor page for HTTP monitors
- Add i18n strings for the new basic authentication section
## Benefits
- Users can monitor endpoints protected by HTTP basic authentication
- Credentials are sent as standard Authorization: Basic base64-encoded header
- Basic auth is only used when bearer token (secret) is not configured