- Change all addon purchase links to https://cyberpanel.net/cyberpanel-addons
- Update error messages in package creation and modification
- Update UI links in create and modify package templates
- Improve link text to 'Purchase CyberPanel Addons'
- Add addon access check via platform.cyberpersons.com API
- Validate addon access in package creation and modification
- Prevent enabling enforceDiskLimits without addons
- Reset resource limits to defaults if addons not available
- Hide resource limits UI for non-addon users
- Show informative message directing users to enable addons
- Apply same restrictions to both create and modify package flows