Don't resize terminal on session disconnect

Rename DISCONNECT_RESIZE to DEFAULT_TERMINAL_SIZE
Update tests for removed _resize_on_disconnect and stricter available check

Bump version to 0.2.7

tests/test_docker_stats.py

@@ -67,13 +67,16 @@ class TestDockerStatsCollector:
     """Tests for Docker stats collector."""
 
     def test_available_checks_socket(self, tmp_path):
-        """available property checks socket existence."""
+        """available property checks socket existence and connectivity."""
         socket_path = tmp_path / "docker.sock"
         collector = DockerStatsCollector(str(socket_path))
         assert collector.available is False
 
+        # Just touching the file isn't enough - need actual socket connectivity
+        # Since we can't easily create a real Unix socket in tests, 
+        # verify that a non-socket file returns False
         socket_path.touch()
-        assert collector.available is True
+        assert collector.available is False  # File exists but can't connect
 
     def test_get_cpu_history_empty(self):
         """Empty history returns empty list."""

tests/test_local_server_unit.py

@@ -167,17 +167,6 @@ class TestLocalServerHelpers:
         assert session_created is True
         ws.send_json.assert_awaited_once_with(["error", "No app configured"])
 
-    @pytest.mark.asyncio
-    async def test_resize_on_disconnect_calls_set_terminal_size(self, server, monkeypatch):
-        session = MagicMock()
-        session.set_terminal_size = AsyncMock()
-
-        monkeypatch.setattr(server.session_manager, "get_session_by_route_key", lambda _rk: session)
-
-        await server._resize_on_disconnect("rk")
-
-        session.set_terminal_size.assert_called_once_with(132, 45)
-
     @pytest.mark.asyncio
     async def test_create_terminal_session_sends_error_if_no_apps(self, server):
         ws = MagicMock()