fix(observatory): preserve camera across follow transitions

tests/test_session_api.py

@@ -1796,6 +1796,7 @@ def test_recorded_blueprint_restores_camera_bounds_after_base_launch_lease_expir
     store.reconcile_archive(xgrids_k1_archive_source(sessions))
     recording_path = tmp_path / "published.rrd"
     calls: list[tuple[Path, dict[str, object]]] = []
+    blueprint_calls: list[dict[str, object]] = []
 
     class PublishedMaterializer:
         def restore_published(self, command: ReplayCommand) -> object:
@@ -1806,11 +1807,19 @@ def test_recorded_blueprint_restores_camera_bounds_after_base_launch_lease_expir
         calls.append((path, kwargs))
         return 123.5
 
+    def blueprint_payload(*_args: object, **kwargs: object) -> bytes:
+        blueprint_calls.append(kwargs)
+        return b"RRF2"
+
     monkeypatch.setattr(
         "k1link.web.session_api.recorded_blueprint_rrd",
-        lambda *_args, **_kwargs: b"RRF2",
+        blueprint_payload,
     )
     monkeypatch.setattr("k1link.web.session_api.recorded_orbital_radius_limit", camera_bounds)
+    monkeypatch.setattr(
+        "k1link.web.session_api.recorded_tracking_position",
+        lambda *_args, **_kwargs: (100.0, 200.0, 300.0),
+    )
     route = endpoint(
         build_session_router(store, recording_materializer=PublishedMaterializer()),  # type: ignore[arg-type]
         "/api/v1/observation-sessions/{session_id}/blueprint.rrd",
@@ -1828,6 +1837,11 @@ def test_recorded_blueprint_restores_camera_bounds_after_base_launch_lease_expir
                 show_points=True,
                 show_trajectory=False,
                 show_grid=True,
+                follow_trajectory=False,
+                eye_position=(3.0, 4.0, 5.0),
+                eye_look_target=(1.0, 2.0, 0.0),
+                eye_up=(0.0, 0.0, 1.0),
+                eye_relative_to_tracking=True,
                 current_time_ns=39_215_000_000,
             ),
         )
@@ -1845,6 +1859,9 @@ def test_recorded_blueprint_restores_camera_bounds_after_base_launch_lease_expir
             },
         )
     ]
+    assert blueprint_calls[0]["eye_position"] == pytest.approx((102.0, 202.0, 305.0))
+    assert blueprint_calls[0]["eye_look_target"] == pytest.approx((100.0, 200.0, 300.0))
+    assert blueprint_calls[0]["eye_up"] == (0.0, 0.0, 1.0)
 
 
 def test_recorded_perception_endpoint_returns_one_complete_optional_overlay(