fix: add missing menu.py module to tracked files

hate_crack/menu.py was imported by main.py but never committed,
causing ModuleNotFoundError on fresh installs.

hate_crack/menu.py

@@ -0,0 +1,89 @@
+"""Reusable interactive menu with optional arrow-key navigation.
+
+When ``simple-term-menu`` is installed AND stdout is a TTY, renders an
+arrow-key navigable menu.  Otherwise falls back to classic numbered
+``print()`` + ``input()`` selection.
+
+Set ``HATE_CRACK_PLAIN_MENU=1`` to force the plain numbered menu.
+"""
+
+from __future__ import annotations
+
+import os
+import sys
+
+try:
+    from simple_term_menu import TerminalMenu
+
+    _HAS_TERM_MENU = True
+except ImportError:
+    _HAS_TERM_MENU = False
+
+
+def _use_arrow_menu() -> bool:
+    if os.environ.get("HATE_CRACK_PLAIN_MENU", "") == "1":
+        return False
+    if not _HAS_TERM_MENU:
+        return False
+    if not sys.stdout.isatty():
+        return False
+    return True
+
+
+def _arrow_menu(
+    items: list[tuple[str, str]],
+    title: str | None,
+) -> str | None:
+    menu_entries = [f"[{key}] {label}" for key, label in items]
+    shortcuts = [key for key, _ in items]
+
+    # Build shortcut_key_highlight_style so pressing a number jumps there
+    menu = TerminalMenu(
+        menu_entries,
+        title=title,
+        shortcut_key_highlight_style=("standout",),
+    )
+    idx = menu.show()
+    if idx is None:
+        return None
+    return shortcuts[idx]
+
+
+def _numbered_menu(
+    items: list[tuple[str, str]],
+    prompt: str,
+) -> str | None:
+    for key, label in items:
+        print(f"\t({key}) {label}")
+    choice = input(prompt).strip()
+    if not choice:
+        return None
+    return choice
+
+
+def interactive_menu(
+    items: list[tuple[str, str]],
+    title: str | None = None,
+    prompt: str = "\nSelect a task: ",
+) -> str | None:
+    """Display *items* as a menu and return the selected key string.
+
+    Parameters
+    ----------
+    items:
+        Ordered ``(key, label)`` pairs.  *key* is the string returned on
+        selection (e.g. ``"1"``, ``"99"``).
+    title:
+        Optional heading printed above the menu (arrow-key mode) or
+        ignored (numbered mode, where callers print their own headers).
+    prompt:
+        Input prompt shown in numbered-menu mode.
+
+    Returns
+    -------
+    str | None
+        The *key* of the selected item, or ``None`` on Escape / cancel.
+    """
+    if _use_arrow_menu():
+        return _arrow_menu(items, title)
+    return _numbered_menu(items, prompt)