// Override to avoid null pointer issues
            final String docid = (String) docMap.get("_id");
            if (docid == null) {
                return "default.jpg";
            }
            return getImageFilename(docid);
        }

        @Override
        public void destroy() {
            // Override to avoid null pointer issues with thread
            generating = false;
        }

* Why is this change done? What's the use case?
* For user-facing features, what will the API look like?
* What test cases should it have? What could go wrong?
* How will it roughly be implemented? We'll happily provide code pointers to save you time.

We may ask you to answer these questions directly in the GitHub issue or (for large changes) in a shared Google Doc.

    overflow-y: auto;
    padding: 0.25rem 0;
}

.filter-check-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    margin: 0;
    cursor: pointer;
    font-size: 0.8125rem;
    color: #172b4d;
    transition: background-color 0.1s ease;
}

.filter-check-item:hover {
    background-color: #f4f5f7;
}

.filter-check-item .filter-check {