- Enhance `settings_load()` function to handle missing settings and parameters
- Improve first-run detection in `check_first_run()` method
- Add more robust settings file validation
- Remove unused imports
- Simplify and clean up code comments
- Create a new `SettingsWindow` class for managing application settings
- Simplify the settings tab in the main application
- Add first-run detection and settings configuration prompt
- Improve settings management with centralized save and load methods
- Update menu to include settings option
- Enhance user experience with more intuitive settings interface
- Comment out TFTP server-related code and imports
- Remove TFTP server tab from the application
- Add global copy, paste, and cut keybindings for Text and Entry widgets
- Remove Firmware directory creation
- Add a new `send_login_password()` function to centralize login/password input logic
- Implement retry mechanism for both line and block command modes
- Add support for detecting and handling command errors (marked by '^' symbol)
- Limit retry attempts to 3 times for each command
- Improve logging and error reporting for command execution
- Update interactive command processing in SerialAppGUI to include retry logic
