fix(viewer): preserve operator camera across AI layers

tests/test_rrd_export.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import hashlib
 import json
+import re
 import struct
 import subprocess
 import sys
@@ -35,7 +36,12 @@ from k1link.device_plugins.xgrids_k1.rrd_export import (
     export_k1mqtt_to_rrd,
     recorded_blueprint_rrd,
 )
-from k1link.viewer.recorded import recorded_blueprint as viewer_recorded_blueprint
+from k1link.viewer.recorded import (
+    recorded_blueprint as viewer_recorded_blueprint,
+)
+from k1link.viewer.recorded import (
+    recorded_blueprint_rrd as viewer_recorded_blueprint_rrd,
+)
 from k1link.viewer.rerun_bridge import RerunSceneSettings
 
 
@@ -410,6 +416,47 @@ def test_viewer_blueprint_reset_is_bounded_and_recreates_render_views() -> None:
     assert perception_behavior.visible.as_arrow_array().to_pylist() == [False]
 
 
+def test_recorded_blueprint_layer_updates_preserve_store_until_explicit_reset() -> None:
+    session_id = "b" * 32
+    initial = viewer_recorded_blueprint_rrd(
+        RerunSceneSettings(accumulation_seconds=12.0),
+        recording_id="stable-camera",
+        blueprint_session_id=session_id,
+        unified_perception=True,
+    )
+    layers_enabled = viewer_recorded_blueprint_rrd(
+        RerunSceneSettings(accumulation_seconds=12.0),
+        recording_id="stable-camera",
+        blueprint_session_id=session_id,
+        unified_perception=True,
+        show_detections_2d=True,
+        show_segmentation=True,
+        show_cuboids_3d=True,
+    )
+    reset = viewer_recorded_blueprint_rrd(
+        RerunSceneSettings(accumulation_seconds=12.0),
+        recording_id="stable-camera",
+        blueprint_session_id=session_id,
+        view_reset_generation=1,
+        unified_perception=True,
+        show_detections_2d=True,
+        show_segmentation=True,
+        show_cuboids_3d=True,
+    )
+
+    store_pattern = rb"rec_[0-9a-f]{32}"
+    initial_store_ids = set(re.findall(store_pattern, initial))
+    layer_store_ids = set(re.findall(store_pattern, layers_enabled))
+    reset_store_ids = set(re.findall(store_pattern, reset))
+    assert len(initial_store_ids) == 1
+    assert layer_store_ids == initial_store_ids
+    assert len(reset_store_ids) == 1
+    assert reset_store_ids.isdisjoint(initial_store_ids)
+    assert len(initial) < 350_000
+    assert len(layers_enabled) < 350_000
+    assert len(reset) < 350_000
+
+
 def test_viewer_blueprint_unifies_original_video_and_independent_ai_layers() -> None:
     blueprint = viewer_recorded_blueprint(
         RerunSceneSettings(accumulation_seconds=12.0),