Fix review finding: added the file injection the review asked for - the manifest now declares lazycat-file-bridge (the /__lazycat_file_bridge read/write bridge) and the lzc-file-chooser-inject browser injection (file input, File System Access and download anchors hooked to the LazyCat file chooser), so its exports (backup JSON, report JSON, achievement share-card PNG) are saved through the LazyCat file chooser to the drive instead of the browser-local path.