Large Image Attachment Warning Excess Bug

### Describe the bug

I tried to include a large image (didn't realize how big it was) and got this message printed out 6x
> ! Images and/or native document attachments were removed from the request due to size constraints. Please use smaller image or document files.

Ok, thanks, just say it once--but fine. Then I made a copy of the image (854x464 px) and tried again and it printed out again 7x the same message after that! Any chat now gets that error yelled out at me!

### Affected version

1.0.72-0

### Steps to reproduce the behavior

1. Include a large image attachment (e.g. 8k image) in your chat
2. You should get a warning
3. Try sending other messages
4. See that you get yelled at more and more each time you take a turn

### Expected behavior

1. I try to include an attachment and it tells me as I paste that the image is too large (and it is going to downscale for me)
2. Alt: if it doesn't downscale it just says it couldn't include the attachment (just the one time I tried to send it, not every message thereafter).

### Additional context

Screenshot of how bad it looks:

Reproduce the issue with an oversized image, then search the codebase for the exact warning text shown in the report. Trace how attachment warnings are stored or displayed across subsequent turns; done means the warning appears only for the offending attachment attempt, not on later messages.

Written by the indexing model from the issue text.