Feature request: shrink image size to 2MB & set upload image size limit to 10MB

1. The user should be able to upload an image less than 10MB
2. When the image is larger than 2MB, compress image to 2MB before saving with a warning about auto-compression

Start by locating the image-upload entry point and the path that saves uploaded files, then trace where file-size validation occurs. Check how warnings are presented to users and identify existing tests around uploads or image handling. Done means uploads under 10MB are accepted, larger images are rejected, and images over 2MB are compressed to 2MB with a warning before saving.

Written by the indexing model from the issue text.