Parsing Large Zendesk JSON/NDJSON Exports Safely in the Browser

To safely parse large Zendesk JSON/NDJSON exports in the browser, use a strategy that tries to parse the complete text as JSON, then falls back to reading non-empty lines individually. For large files, use a readable stream to preserve incomplete lines between chunks. Catch errors per line and report the source filename and malformed-record count. This approach prevents a single bad record from making every valid ticket invisible.