Remove the leftover MAX_AUTO_SAVE_SIZE_BYTES guard from handleFileChunk's
in-memory path. The request gate (canReceiveAttachment) already admits 10-50 MB
generic files for in-memory receive on stores without disk streaming (browser),
but the chunk handler silently dropped every chunk of such files: no ack was
sent, the sender's waitForAck timed out, and the receiver's GUI never changed.
Receive admission is now decided once, at request time.
Adds a two-browser regression e2e that sends an 11 MB generic file and asserts
Request -> progress -> Download.
Co-authored-by: Cursor <cursoragent@cursor.com>
myxeliumandCursor
590e487250