Save clipboard images as PNG under ~/.deepseek/clipboard-images/
instead of PPM in the workspace, and surface dimensions + size in the
composer's [Attached image: WxH PNG (NkB) at <path>] token plus the
post-paste status hint. DeepSeek V4 does not currently accept inline
image input on its Chat Completions endpoint, so we materialize the
bytes to disk and let the model reach them via the existing file
tools rather than base64-embedding them in the request.
Adds the `image` crate (PNG-only feature; already pulled in
transitively via arboard, so no compile-time delta) plus unit tests
covering PNG header round-trip and label formatting.
Fixes#92
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Hunter Bown
5b0af72c3d