* feat: Add SSH key authentication and custom port support
- Add SSH key authentication support with three modes: password, key, or both
- Add custom SSH port support (defaults to 22)
- Create SSHKeyInput component with file upload and paste modes
- Update database schema with auth_type, ssh_key, ssh_key_passphrase, and ssh_port columns
- Update TypeScript interfaces to support new authentication fields
- Update SSH services to handle key authentication and custom ports
- Update ServerForm with authentication type selection and SSH port field
- Update API routes with validation for new fields
- Add proper cleanup for temporary SSH key files
- Support for encrypted SSH keys with passphrase protection
- Maintain backward compatibility with existing password-only servers
* fix: Resolve TypeScript build errors and improve type safety
- Replace || operators with ?? (nullish coalescing) for better type safety
- Add proper null checks for password fields in SSH services
- Fix JSDoc type annotations for better TypeScript inference
- Update error object types to use Record<keyof CreateServerData, string>
- Ensure all SSH authentication methods handle optional fields correctly
* feat: Add settings modal with GitHub PAT and filter toggle
- Add GeneralSettingsModal with General and GitHub tabs
- Create GitHub PAT input field that saves to .env as GITHUB_TOKEN
- Add animated toggle component for SAVE_FILTER setting
- Create API endpoints for settings management
- Add Input and Toggle UI components
- Implement smooth animations for toggle interactions
- Add proper error handling and user feedback
* feat: Add filter persistence with settings integration
- Add filter persistence system that saves user filter preferences to .env
- Create FILTERS variable in .env to store complete filter state as JSON
- Add SAVE_FILTER toggle in settings to enable/disable persistence
- Implement auto-save functionality with 500ms debounce
- Add loading states and visual feedback for filter restoration
- Create API endpoints for managing saved filters
- Add filter management UI in settings modal
- Support for search query, type filters, sort order, and updatable status
- Seamless integration across all script tabs (Available, Downloaded, Installed)
- Auto-clear saved filters when persistence is disabled
- Add proper type annotations for WebSocketMessage and ServerInfo types
- Fix type imports to use type-only imports where appropriate
- Replace logical OR operators with nullish coalescing operators
- Fix floating promises by adding void operator
- Add proper type assertions for database results
- Fix useEffect dependencies in Terminal component
- Remove unused variables and fix unescaped entities
- Add JSDoc type annotations for database methods
- Fix singleton instance type annotations
