Method add

src/command_system/input_processing.py:804–814

Add an entry to history.

(self, text: str)

        self._cursor: int = -1

    def add(self, text: str) -> None:
        """Add an entry to history."""
        if not text.strip():
            return
        # Don't add duplicates of the last entry
        if self._entries and self._entries[-1] == text:
            return
        self._entries.append(text)
        if len(self._entries) > self._max_entries:
            self._entries.pop(0)
        self._cursor = len(self._entries)

    def previous(self) -> str | None:
        """Get previous history entry (up arrow)."""