Client transport half of the layer-stream protocol.
- SimBridge.request_atlas_layers(body_id) sends an AtlasLayerRequest frame
(live mode only; no-op in test mode); responses arrive via a new
atlas_layers_received signal.
- receive_bytes now decodes each frame ONCE via Protocol.decode_inbound and
branches by shape (snapshot vs atlas response) — avoids double-decoding the
20 Hz snapshot path. decode_snapshot is split into decode_raw +
_decode_snapshot_from_raw (public decode_snapshot unchanged, so the 70 protocol
tests stay the regression guard); decode_inbound returns {kind, value}.
70/70 protocol tests pass, including the new decode_inbound classifier test.
(Pre-existing client-suite failures in server-dependent e2e/roundtrip + unrelated
audio/fog/dialogue suites are unchanged — verified identical at baseline.)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>