fix(channel): scope stop and restore resume history (#186)

* fix(channel): scope stop and restore resume history

* refactor(channel): simplify stop and resume patch

* Delete PR_MESSAGE.md

* fix(channel): address review feedback

* fix(channel): address remaining review bugs

* fix(channel): clean up stopped request handling

* fix(channel): preserve resolved replies and sync tui commands

---------

Co-authored-by: Xi Zhang <106144707+X-iZhang@users.noreply.github.com>

tests/test_tui_command_sync.py

@@ -0,0 +1,90 @@
+"""Tests for TUI command-completion state sync."""
+
+from types import SimpleNamespace
+
+import pytest
+
+from EvoScientist.commands.base import CommandContext
+from tests.conftest import run_async as _run
+
+pytest.importorskip("textual")
+
+
+class _Loader:
+    def __init__(self) -> None:
+        self.adopt_calls: list[object] = []
+
+    def adopt(self, agent: object) -> None:
+        self.adopt_calls.append(agent)
+
+
+class _StubApp:
+    def __init__(self) -> None:
+        self._agent_loader = _Loader()
+        self._conversation_tid = "thread-1"
+        self.model_updates: list[tuple[str, str | None]] = []
+        self.refresh_calls: list[bool] = []
+
+    def update_status_after_model_change(
+        self,
+        new_model: str,
+        new_provider: str | None = None,
+    ) -> None:
+        self.model_updates.append((new_model, new_provider))
+
+    async def _refresh_status_snapshot(
+        self,
+        *,
+        reset_streaming_text: bool = True,
+    ) -> None:
+        self.refresh_calls.append(reset_streaming_text)
+
+
+def test_sync_tui_command_completion_adopts_agent_swap(monkeypatch):
+    import EvoScientist.cli.tui_interactive as tui_mod
+    from EvoScientist import EvoScientist as evosci_mod
+
+    app = _StubApp()
+    ctx = CommandContext(
+        agent="new-agent",
+        thread_id="thread-1",
+        ui=SimpleNamespace(),
+    )
+    cmd = SimpleNamespace(name="/model")
+
+    monkeypatch.setattr(
+        evosci_mod,
+        "_ensure_config",
+        lambda: SimpleNamespace(model="gpt-5.5", provider="openai"),
+    )
+    monkeypatch.setattr(tui_mod, "_channels_is_running", lambda: True)
+    monkeypatch.setattr(tui_mod._ch_mod, "_cli_agent", "old-agent", raising=False)
+    monkeypatch.setattr(tui_mod._ch_mod, "_cli_thread_id", "old-thread", raising=False)
+
+    _run(tui_mod._sync_tui_command_completion(app, ctx, "old-agent", cmd))
+
+    assert app._agent_loader.adopt_calls == ["new-agent"]
+    assert app.model_updates == [("gpt-5.5", "openai")]
+    assert app.refresh_calls == [True]
+    assert tui_mod._ch_mod._cli_agent == "new-agent"
+    assert tui_mod._ch_mod._cli_thread_id == "thread-1"
+
+
+def test_sync_tui_command_completion_refreshes_without_agent_swap(monkeypatch):
+    import EvoScientist.cli.tui_interactive as tui_mod
+
+    app = _StubApp()
+    ctx = CommandContext(
+        agent="same-agent",
+        thread_id="thread-1",
+        ui=SimpleNamespace(),
+    )
+    cmd = SimpleNamespace(name="/compact")
+
+    monkeypatch.setattr(tui_mod, "_channels_is_running", lambda: False)
+
+    _run(tui_mod._sync_tui_command_completion(app, ctx, "same-agent", cmd))
+
+    assert app._agent_loader.adopt_calls == []
+    assert app.model_updates == []
+    assert app.refresh_calls == [True]