Fix review snapshots without handwriting images

tests/test_finalisation_web.py

@@ -177,6 +177,29 @@ class WebTests(unittest.TestCase):
 
 
 class SnapshotTests(unittest.TestCase):
+    def test_grouped_layout_without_handwriting_replaces_previous_ink(self):
+        from copienator.review_snapshot import stage, load
+        from copienator.annotation_layout import legacy_layout
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            seed(root, 'BGnot')
+            output = root / 'BGnot/Copie01'
+            data = {label: {'pdf_path': root / f'{label}.pdf', 'result': {'score': 3}}
+                    for label in ('Ex 1', 'Ex 2')}
+            ink = Image.new('RGBA', (100, 120), 'red')
+            notes = {label: {'img': ink, 'old_header_h': 20, 'layout': legacy_layout()}
+                     for label in data}
+            with staged_files(output) as staging:
+                stage(output, staging, data, notes, engine='grouped')
+            notes['Ex 1']['img'] = None
+            for selected in ({'Ex 1'}, None):
+                with staged_files(output) as staging:
+                    stage(output, staging, data, notes, engine='grouped', selected=selected)
+                saved, _, restored = load(root, output)
+                self.assertIsNone(saved['notes']['Ex 1']['file'])
+                self.assertEqual(restored['Ex 1'], notes['Ex 1'])
+                self.assertEqual(restored['Ex 2']['img'].getpixel((0, 0)), (255, 0, 0, 255))
+
     def test_selective_redo_merges_raw_inputs_and_preserves_handwriting(self):
         from copienator.review_snapshot import stage, load
         with tempfile.TemporaryDirectory() as temporary:
@@ -214,8 +237,9 @@ class SnapshotTests(unittest.TestCase):
                 pdf = root / 'Copies/Copie01/Ex 1.pdf'
                 pdf.write_bytes(b'placeholder')
                 data = {'Ex 1': {'pdf_path': pdf, 'result': {'score': 3, 'feedback': []}, 'coordinates': [0,0]}}
+                notes = {'Ex 1': {'img': None, 'old_header_h': 20}} if mode == 'BGnot' else {}
                 with staged_files(output) as staging:
-                    stage(output, staging, data, {}, engine='standard' if mode == 'Bnot' else 'grouped',
+                    stage(output, staging, data, notes, engine='standard' if mode == 'Bnot' else 'grouped',
                           bnote={'images':[{'label':'Ex 1','header_height':20}]})
                 set_remark(root, '01', 'Ex 1', 'Une seule remarque')
                 with patch.object(annotating, 'make_base_image', return_value=(Image.new('RGB',(100,100),'white'),0,0)), \