Add crop manager for staging and training image lifecycle

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/unit/test_crop_manager.py

@@ -0,0 +1,48 @@
+"""Tests for detection crop saving and staging cleanup."""
+
+import time
+from pathlib import Path
+
+import numpy as np
+
+from vigilar.detection.crop_manager import CropManager
+
+
+class TestCropManager:
+    def test_save_crop(self, tmp_path):
+        manager = CropManager(staging_dir=str(tmp_path / "staging"),
+                              training_dir=str(tmp_path / "training"))
+        crop = np.zeros((100, 80, 3), dtype=np.uint8)
+        path = manager.save_staging_crop(crop, species="cat", camera_id="kitchen")
+        assert Path(path).exists()
+        assert "cat" in path
+        assert "kitchen" in path
+
+    def test_promote_to_training(self, tmp_path):
+        manager = CropManager(staging_dir=str(tmp_path / "staging"),
+                              training_dir=str(tmp_path / "training"))
+        crop = np.zeros((100, 80, 3), dtype=np.uint8)
+        staging_path = manager.save_staging_crop(crop, species="cat", camera_id="kitchen")
+        training_path = manager.promote_to_training(staging_path, pet_name="angel")
+        assert Path(training_path).exists()
+        assert "angel" in training_path
+        assert not Path(staging_path).exists()
+
+    def test_cleanup_old_crops(self, tmp_path):
+        staging = tmp_path / "staging"
+        staging.mkdir(parents=True)
+
+        old_file = staging / "old_crop.jpg"
+        old_file.write_bytes(b"fake")
+        old_time = time.time() - 10 * 86400
+        import os
+        os.utime(old_file, (old_time, old_time))
+
+        new_file = staging / "new_crop.jpg"
+        new_file.write_bytes(b"fake")
+
+        manager = CropManager(staging_dir=str(staging), training_dir=str(tmp_path / "training"))
+        deleted = manager.cleanup_expired(retention_days=7)
+        assert deleted == 1
+        assert not old_file.exists()
+        assert new_file.exists()