feat(backends,jobs,telegram,conversations): mcp calls carry the conversation origin, quiet branches close asleep, fresh topics get named

tests/test_telegram.py

@@ -519,10 +519,10 @@ async def test_commands_status_merge_and_new(stack: Stack) -> None:
         frontend="telegram", external_id=f"{USER}/11"
     )
     assert branch.status == "merged"
-    assert stack.bot.topics == ["🦫 General", "edit:11:✅ work"]
+    assert stack.bot.topics == ["🦫 General", "edit:11:work", "edit:11:✅ work"]
     stack.bot.message("/new отчёт")
     await stack.until(lambda: stack.sent_with("in a new topic"), what="new topic")
-    assert stack.bot.topics == ["🦫 General", "edit:11:✅ work", "отчёт"]
+    assert stack.bot.topics[-1] == "отчёт"
     child = await stack.world.conversations.find_bound(
         frontend="telegram", external_id=f"{USER}/902"
     )
@@ -1298,3 +1298,34 @@ def test_a_tool_call_between_progress_updates_starts_a_new_paragraph() -> None:
     )
     feed(_thinking_delta("now writing it back"))
     assert draft.text == "reading the note\n\nnow writing it back"
+
+
+async def test_a_closed_topic_is_marked_asleep_and_wakes_with_a_new_branch(
+    stack: Stack,
+) -> None:
+    stack.bot.message("кухня на неделю\nи ещё строка", thread=12)
+    await stack.until(lambda: stack.sent_with("кухня на неделю"), what="reply")
+    assert stack.bot.topics[-1] == "edit:12:кухня на неделю"
+    branch = await stack.world.conversations.find_bound(
+        frontend="telegram", external_id=f"{USER}/12"
+    )
+    closed = await stack.world.conversations.close(branch)
+    assert await stack.world.conversations.mark_closed(closed)
+    assert stack.bot.topics[-1] == "edit:12:💤 кухня на неделю"
+    stack.tg._topic_names.clear()  # noqa: SLF001
+    stack.bot.message("а в четверг?", thread=12)
+    await stack.until(lambda: stack.sent_with("а в четверг?"), what="new branch")
+    assert stack.bot.topics[-1] == "edit:12:кухня на неделю"
+    fresh = await stack.world.conversations.find_bound(
+        frontend="telegram", external_id=f"{USER}/12"
+    )
+    assert fresh.id != branch.id
+    assert fresh.status == "open"
+    assert fresh.title == "кухня на неделю"
+
+
+async def test_a_named_topic_keeps_its_name(stack: Stack) -> None:
+    stack.bot.topic_created("план", 13)
+    stack.bot.message("hello", thread=13)
+    await stack.until(lambda: stack.sent_with("hello"), what="reply")
+    assert not any(t.startswith("edit:13:") for t in stack.bot.topics)