feat: show active task count in /status output

tests/cli/test_restart_command.py

@@ -140,6 +140,7 @@ class TestRestartCommand:
         loop.consolidator.estimate_session_prompt_tokens = MagicMock(
             return_value=(20500, "tiktoken")
         )
+        loop.subagents.get_running_count_by_session.return_value = 0
 
         msg = InboundMessage(channel="telegram", sender_id="u1", chat_id="c1", content="/status")
 
@@ -151,6 +152,7 @@ class TestRestartCommand:
         assert "Context: 20k/65k (31%)" in response.content
         assert "Session: 3 messages" in response.content
         assert "Uptime: 2m 5s" in response.content
+        assert "Tasks: 0 active" in response.content
         assert response.metadata == {"render_as": "text"}
 
     @pytest.mark.asyncio
@@ -179,6 +181,7 @@ class TestRestartCommand:
         loop.consolidator.estimate_session_prompt_tokens = MagicMock(
             return_value=(0, "none")
         )
+        loop.subagents.get_running_count_by_session.return_value = 0
 
         response = await loop._process_message(
             InboundMessage(channel="telegram", sender_id="u1", chat_id="c1", content="/status")
@@ -187,6 +190,7 @@ class TestRestartCommand:
         assert response is not None
         assert "Tokens: 1200 in / 34 out" in response.content
         assert "Context: 1k/65k (1%)" in response.content
+        assert "Tasks: 0 active" in response.content
 
     @pytest.mark.asyncio
     async def test_process_direct_preserves_render_metadata(self):
@@ -195,6 +199,7 @@ class TestRestartCommand:
         session.get_history.return_value = []
         loop.sessions.get_or_create.return_value = session
         loop.subagents.get_running_count.return_value = 0
+        loop.subagents.get_running_count_by_session.return_value = 0
 
         response = await loop.process_direct("/status", session_key="cli:test")