Handle file not found when scanning track

app/helpers.py

@@ -132,7 +132,11 @@ def get_audio_metadata(filepath: str) -> Dict[str, str | int | float]:
 
     metadata: Dict[str, str | int | float] = {}
 
-    metadata["mtime"] = os.path.getmtime(filepath)
+    try:
+        metadata["mtime"] = os.path.getmtime(filepath)
+    except FileNotFoundError:
+        show_warning(None, "File not found", f"Filepath {filepath} not found")
+        return {}
 
     # Set start_gap, fade_at and silence_at
     audio = get_audio_segment(filepath)
@@ -200,7 +204,10 @@ def get_tags(path: str) -> Dict[str, Any]:
     Return a dictionary of title, artist, duration-in-milliseconds and path.
     """
 
-    tag = TinyTag.get(path)
+    try:
+        tag = TinyTag.get(path)
+    except FileNotFoundError:
+        return {}
 
     return dict(
         title=tag.title,