Update app.py

app.py

@@ -594,6 +594,17 @@ def choose_top_candidates(embedding_results, phash_results, imgmatch_results, to
         print("\nConsensus (in top-{0} of ALL metrics): {1}".format(top_k, result["consensus_topk"]))
 
     return result
+
+def is_subpath(path: str, base: str) -> bool:
+    """Return True if path is inside base (works across OSes)."""
+    try:
+        p = os.path.normpath(os.path.abspath(path))
+        b = os.path.normpath(os.path.abspath(base))
+        if os.name == "nt":
+            p = p.lower(); b = b.lower()
+        return os.path.commonpath([p, b]) == b
+    except Exception:
+        return False
     
 # Helper function to load the block catalog from a JSON file
 def _load_block_catalog(block_type: str) -> Dict:
@@ -2235,7 +2246,8 @@ def similarity_matching(sprites_data: dict, project_folder: str, top_k: int = 1,
         matched_filename = os.path.basename(matched_image_path)
 
         # If it's a sprite (under SPRITE_DIR) -> copy sprite assets and read sprite.json
-        if matched_folder.startswith(sprite_base_path) and matched_folder not in copied_sprite_folders:
+        # if matched_folder.startswith(sprite_base_path) and matched_folder not in copied_sprite_folders:
+        if is_subpath(matched_folder, sprite_base_path) and matched_folder not in copied_sprite_folders:
             copied_sprite_folders.add(matched_folder)
             sprite_json_path = os.path.join(matched_folder, "sprite.json")
             if os.path.exists(sprite_json_path):
@@ -2260,7 +2272,8 @@ def similarity_matching(sprites_data: dict, project_folder: str, top_k: int = 1,
                         print("Failed to copy sprite asset %s: %s", src, e)
 
         # If it's a backdrop (under BACKDROP_DIR) -> copy backdrop assets and read project.json for stage
-        if matched_folder.startswith(backdrop_base_path) and matched_folder not in copied_backdrop_folders:
+        # if matched_folder.startswith(backdrop_base_path) and matched_folder not in copied_backdrop_folders:
+        if is_subpath(matched_folder, backdrop_base_path) and matched_folder not in copied_backdrop_folders:
             copied_backdrop_folders.add(matched_folder)
             # copy matched backdrop image
             try: