Fixed multiple issues with GitHub App source creation and management:
1. **Fixed null property assignment error on component mount**
- Changed property types to nullable in Change component (appId, installationId, clientId, etc.)
- Updated validation rules to allow nullable values
- Allows mounting component with newly created GitHub Apps that don't have these fields set yet
2. **Fixed Livewire morphing error on manual creation**
- Modified createGithubAppManually() to redirect after saving
- Prevents "Cannot read properties of null" error when view structure changes
- Fields now properly populated after manual creation without requiring page refresh
3. **Fixed is_system_wide not being saved on creation**
- Removed backwards logic that only saved is_system_wide on cloud instances
- Added is_system_wide to GithubApp model casts for proper boolean handling
- System-wide checkbox now works correctly on self-hosted instances
4. **Fixed misleading preview deployment checkbox**
- Removed instantSave attribute from permission checkboxes in unconfigured state
- These are configuration options for GitHub App creation, not database fields
- Prevents "GitHub App updated" success message when nothing was actually saved
5. **Added validation for Refetch Permissions button**
- Validates App ID and Private Key are set before attempting to fetch
- Shows clear error messages: "Cannot fetch permissions. Please set the following required fields first: App ID, Private Key"
- Prevents crash when private key is null or invalid
6. **Better error handling for unsupported private key formats**
- Detects OpenSSH format keys vs RSA PEM format
- Shows helpful message: "Please use an RSA private key in PEM format (BEGIN RSA PRIVATE KEY). OpenSSH format keys are not supported."
- GitHub Apps require RSA PEM format, not OpenSSH format
7. **Made GitHub App view mobile responsive**
- Updated all flex layouts to stack vertically on mobile (flex-col sm:flex-row)
- Form fields, buttons, and sections now properly responsive
- No more cut-off fields on small screens
Added comprehensive test coverage:
- GithubSourceChangeTest.php with 7 tests
- GithubSourceCreateTest.php with 6 tests
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
