core/cli: pause turn cancel during TTY confirm prompts

Max-rounds and destructive-tool confirms no longer cancel the in-flight
turn; SIGINT during the prompt aborts only the confirm.

tests/test_cli/test_interrupt.py

@@ -0,0 +1,25 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from plyngent.cli.interrupt import allow_task_cancel, pause_task_cancel_for_prompt
+from plyngent.cli.limits import prompt_continue_limit
+
+if TYPE_CHECKING:
+    import pytest
+
+
+def test_pause_task_cancel_for_prompt() -> None:
+    assert allow_task_cancel() is True
+    with pause_task_cancel_for_prompt():
+        assert allow_task_cancel() is False
+    assert allow_task_cancel() is True
+
+
+def test_prompt_continue_limit_under_pause(monkeypatch: pytest.MonkeyPatch) -> None:
+    def _confirm(*_a: object, **_k: object) -> bool:
+        assert allow_task_cancel() is False
+        return True
+
+    monkeypatch.setattr("click.confirm", _confirm)
+    assert prompt_continue_limit("too many rounds") is True