• oracle with no arguments now prints the help/usage banner; launch the interactive UI explicitly via oracle tui (keeps ORACLE_FORCE_TUI for automation/tests). README updated to match.
• TUI exits gracefully when the terminal drops raw mode (e.g., setRawMode EIO after pager issues) and shows a hint to run stty sane.
• Ctrl+C in the TUI menu now exits cleanly without printing the paging error loop.
• Exit banner is printed once when leaving the TUI, preventing duplicate "Closing the book" messages after SIGINT or exit actions.