Replace direct shell interpolation of environment values with base64 encoding
to prevent command injection attacks. Environment configuration is now built as
a single string, base64-encoded, then decoded to file atomically.
Also add regex validation to restrict environment field values to safe
characters (alphanumeric, underscore, hyphen, dot) at the application layer.
Fixes GHSA-3xm2-hqg8-4m2p
- Added authorization checks using the `authorize` method in various Livewire components to ensure only authorized users can update server settings.
- Updated `ServerPolicy` to restrict update permissions to admin users and their respective teams.
- Enhanced security and access control for server management functionalities.
