Fix ruff violations (import sort, unused imports, whitespace) in
backup_database.py, generate_website.py, meshcore_bot.py,
migrate_webviewer_db.py, packet_capture_service.py, version_info.py,
scripts/config_tui.py, scripts/update_todos.py, and validate_config.py.
Fix mypy stale type-ignore and remove unused imports in test files.
Add is_radio_zombie/is_radio_offline mock attributes to command_manager
test fixtures to prevent truthy Mock early returns.
Add scripts/config_tui.py: browse, edit, save, validate, and migrate
config.ini interactively. Key bindings: r rename key, a add key+value,
d/Delete remove key with confirmation. Dynamic sections such as
[Scheduled_Messages] suppress the unknown-key ? marker. Access via
make config or CONFIG=path make config.
Stacy Olivas