* fix(gateway): increase WebSocket max payload to 5 MB for image uploads
The 512 KB limit was too small for base64-encoded images — a 400 KB
image becomes ~532 KB after encoding, exceeding the limit and closing
the connection with code 1006.
Bump MAX_PAYLOAD_BYTES to 5 MB and MAX_BUFFERED_BYTES to 8 MB to
support standard image uploads via webchat.
Closes#14400
* fix: align gateway WS limits with 5MB image uploads (#14486) (thanks @0xRaini)
* docs: fix changelog conflict for #14486
---------
Co-authored-by: 0xRaini <0xRaini@users.noreply.github.com>
Co-authored-by: Peter Steinberger <steipete@gmail.com>
Images were previously converted to markdown data URLs which Claude API
treats as plain text, not as actual images.
Changes:
- Add parseMessageWithAttachments() that returns {message, images[]}
- Pass images through the stack to session.prompt() as content blocks
- Filter null/empty attachments before parsing
- Strip data URL prefix if client sends it
This enables iOS and other clients to send images that Claude can actually see.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
