Refaire fixes and GUI support

copienator/annotation_data.py

@@ -36,7 +36,12 @@ def _coordinate_index(
     if not workspace.groups_dir.is_dir():
         return index, [f"Group directory not found: {workspace.groups_dir}"]
 
-    for metadata_path in sorted(workspace.groups_dir.glob("*/Group_*.json")):
+    # A redo appends a new numbered group; its coordinates supersede the old group.
+    for metadata_path in sorted(
+        workspace.groups_dir.glob("*/Group_*.json"),
+        key=lambda path: int(path.stem.removeprefix("Group_")),
+        reverse=True,
+    ):
         image_path = metadata_path.with_suffix(".jpg")
         try:
             entries = read_json(metadata_path)
@@ -160,12 +165,16 @@ def load_annotation_data(
                 warnings.append(f"Ignoring malformed correction batch for {label!r}")
                 continue
             for item in raw_batch:
-                if not isinstance(item, dict) or not isinstance(item.get("result"), dict):
+                if not isinstance(item, dict) or not isinstance(
+                    item.get("result"), dict
+                ):
                     warnings.append(f"Ignoring malformed correction item for {label!r}")
                     continue
                 student_id = str(item.get("id", ""))
                 if not student_id:
-                    warnings.append(f"Ignoring correction item without an id for {label!r}")
+                    warnings.append(
+                        f"Ignoring correction item without an id for {label!r}"
+                    )
                     continue
                 result = item["result"]
                 suffix = str(result.get("suffix", ""))