WeiChat 0.2.1: cloud/local file picker integration for uploads and downloads. Save attachments to LazyCat Cloud Drive or the local device; conflicts use a new name. Improves SSE delivery, reconnects, replay, history, drafts, retries, search and reading position. In-place upgrades preserve messages and files. Review image/file upload controls and attachment downloads. Requires LazyCat OS 1.6.2+. Android native notifications and background behavior have not been tested on a physical device.