updated scan.py to help us error handle the weird searches and alos build an ignore list

fccs_config.py

@@ -137,3 +137,23 @@ def load_lines(path):
         return []
     with open(path, "r", encoding="utf-8") as f:
         return [line.strip() for line in f if line.strip() and not line.strip().startswith("#")]
+
+
+def check_for_clashes(drawer_ids):
+    """Find drawer IDs that are a prefix of another drawer ID.
+
+    FCCS searches by prefix, so searching the shorter ID (e.g. '02218')
+    pops up a selection box when a longer ID exists (e.g. '02218A'),
+    which breaks the automated navigation.
+
+    Returns a list of (short_id, [longer_ids...]) tuples, sorted by short_id.
+    Empty list means no clashes.
+    """
+    ids = sorted(set(drawer_ids))
+    clashes = []
+    for short in ids:
+        matches = [other for other in ids
+                   if other != short and other.startswith(short)]
+        if matches:
+            clashes.append((short, matches))
+    return clashes