install.py:
- sudo prefix now determined by euid (== 0 means root) not by OS name
- Previously used 'sudo ' for all Linux — breaks inside Docker where we
run as root but sudo is not installed
- Single priv variable computed once at top of install_system_packages()
Dockerfile:
- Add python3-venv back to apt installs
- Was removed as 'unused' but install.py uses 'python3 -m venv' to create
the virtualenv in APP_INSTALL_DIR; missing package caused venv failure
core.py (HackingTool.show_options + HackingToolsCollection.show_options):
- 99 always returns now instead of sys.exit() when parent is None
Previously: sub-menus with no parent called sys.exit() — since
interact_menu() never passes parent, pressing 99 in any category
exited the entire program instead of returning to the main menu
- Empty Enter (blank input) now continues the loop instead of
defaulting to "99" and triggering exit
Previously: Prompt default="99" meant pressing Enter without typing
anything was treated as choosing exit
- "Exit" label on 99 row changed to "Main Menu" since it now returns
