handleRaw only streamed the blob behind an isImageMime gate (#221), so non-image attachment pastes fell through to empty row.Content and /raw served 0 bytes. Serve the blob for every attachment mime, passing the sniffed mime through serveContentType so active-content types (html, svg, xml) still serve as text/plain per the #34 rule. Regression tests cover text and html attachments (size, Content-Type, byte equality).