Issue Report: Post submitted despite "File Too Large" attachment error

When attempting to post an image that exceeds the file size limit, the system displays a "file size too large" warning, but still commits the text portion of the post to the database.

Environment:

• Interface: Web

• Browser: Safari

• Device: Desktop

Steps to Reproduce:

1. Open a post and compose a new comment with text.

2. Attach an image that exceeds the DIGG maximum file size limit.

3. Click "Post."

4. Observe the "File size too large" error message.

5. Refresh the thread.

Actual Results: The post is successfully published to the thread, but it is missing the image attachment. This leads to unintentional "ghost" posts or double-posting when the user tries again with a smaller file.

Expected Results: If an attachment fails validation (size limit), the entire post transaction should be cancelled, allowing the user to resize the image and resubmit without creating a partial/duplicate post.