refactor(lab): restore canonical RAV004 replay

tests/test_vegetation_shadow_lab.py

@@ -22,6 +22,7 @@ from k1link.laboratory.evidence_report import verify_laboratory_evidence_result
 from k1link.laboratory.vegetation_policy_review import seal_vegetation_policy_review
 from k1link.laboratory.vegetation_shadow_lab import seal_vegetation_shadow_lab
 from k1link.web.vegetation_shadow_lab_api import (
+    _mask_component_boxes,
     _route_tgs_anchor_payload,
     build_vegetation_shadow_lab_router,
 )
@@ -29,6 +30,18 @@ from k1link.web.vegetation_shadow_lab_api import (
 REPOSITORY_ROOT = Path(__file__).resolve().parents[1]
 
 
+def test_semantic_component_boxes_keep_distinct_objects_separate() -> None:
+    mask = np.zeros((20, 30), dtype=np.uint8)
+    mask[2:10, 3:8] = 4
+    mask[4:12, 18:24] = 4
+    mask[15:17, 3:5] = 4
+
+    assert _mask_component_boxes(mask, 4, minimum_pixels=20) == [
+        (18, 4, 24, 12, 48),
+        (3, 2, 8, 10, 40),
+    ]
+
+
 def test_route_tgs_anchor_payload_preserves_metric_evidence(tmp_path: Path) -> None:
     path = tmp_path / "tgs-evidence.npz"
     point_counts = np.arange(1, 11, dtype=np.int64)