feat: report tmux prompt injection failures

tests/test_tmux.py

@@ -697,6 +697,46 @@ async def test_respawn_pane_no_env(runner):
     assert "-e" not in call_args
 
 
+@pytest.mark.asyncio
+async def test_send_text_returns_true_on_success(runner):
+    runner._exec.return_value = (0, "", "")
+
+    assert await runner.send_text("hqt-1", "hello") is True
+
+
+@pytest.mark.asyncio
+async def test_send_text_returns_false_on_failure(runner):
+    runner._exec.return_value = (1, "", "no such target")
+
+    assert await runner.send_text("hqt-1", "hello") is False
+
+
+@pytest.mark.asyncio
+async def test_send_enter_returns_true_on_success(runner):
+    runner._exec.return_value = (0, "", "")
+
+    assert await runner.send_enter("hqt-1") is True
+
+
+@pytest.mark.asyncio
+async def test_send_enter_returns_false_on_failure(runner):
+    runner._exec.return_value = (1, "", "no such target")
+
+    assert await runner.send_enter("hqt-1") is False
+
+
+@pytest.mark.asyncio
+async def test_manager_send_delegates(runner):
+    mgr = TmuxManager(runner)
+    runner.send_text = AsyncMock(return_value=True)
+    runner.send_enter = AsyncMock(return_value=True)
+
+    assert await mgr.send_text("hqt-1", "continue") is True
+    assert await mgr.send_enter("hqt-1") is True
+    runner.send_text.assert_awaited_once_with("hqt-1", "continue")
+    runner.send_enter.assert_awaited_once_with("hqt-1")
+
+
 @pytest.mark.asyncio
 async def test_spawn_verify_dead_empty_text_returns_fallback_error(runner):
     """When verify_window_alive returns (False, ''), spawn returns the fallback error message."""