[Bug] Numbers spreadsheet paste interpreted as image causing conversation failure

Bug Description
Copy paste from Numbers was interpreted as an image and it rendered the whole conversation unuable.

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.0.28
• Feedback ID: 64a4a934-b7f0-4215-9216-e2f88e877220

Errors

[{"error":"Error: Input Buffer is empty\n    at YXD (/$bunfs/root/claude:226:28399)\n    at new Cu (/$bunfs/root/claude:226:3236)\n    at Cu (/$bunfs/root/claude:226:236)\n    at er (/$bunfs/root/claude:226:79939)\n    at async bER (/$bunfs/root/claude:226:82831)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-10-29T08:59:29.993Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.15.content.0.image.source.base64: image cannot be empty\"},\"request_id\":\"req_011CUbDSoJjwDV9jFUQ3ZH4A\"}\n    at generate (/$bunfs/root/claude:379:25927)\n    at makeRequest (/$bunfs/root/claude:524:5345)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-10-29T08:59:45.739Z"},{"error":"Error: Input Buffer is empty\n    at YXD (/$bunfs/root/claude:226:28399)\n    at new Cu (/$bunfs/root/claude:226:3236)\n    at Cu (/$bunfs/root/claude:226:236)\n    at er (/$bunfs/root/claude:226:79939)\n    at async bER (/$bunfs/root/claude:226:82831)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-10-29T09:00:15.675Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.15.content.0.image.source.base64: image cannot be empty\"},\"request_id\":\"req_011CUbDV8XgpWrhjwf523i44\"}\n    at generate (/$bunfs/root/claude:379:25927)\n    at makeRequest (/$bunfs/root/claude:524:5345)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-10-29T09:00:16.982Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.15.content.0.image.source.base64: image cannot be empty\"},\"request_id\":\"req_011CUbDXYMDDqKpFNPZCowc5\"}\n    at generate (/$bunfs/root/claude:379:25927)\n    at makeRequest (/$bunfs/root/claude:524:5345)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-10-29T09:00:49.760Z"}]