[FEAT] - Deferred Image Deletion Until Save Edits Button Clicked

[marclupanc]

Description
Currently, clicking the trash icon on an image immediately removes it from the database. To improve the user experience, we should instead create a temporary list of images to be deleted. These images should only be permanently removed when the user clicks the Save Edits button.

Requirements

• When the user click the trash icon, the image should be either remove from the display immediately (from UI only) or grayed out or marked as "to be deleted"
• The image should be added to a temporary deletion list stored in the local application state
• User should have an option to "undo" the deletion for any image before clicking the Save Edits button
• If the user cancels their edits or navigates away, the deletion list should be discarded and all images should remain itact in the databse

Acceptance Criteria

• Clicking the trash icon removes the image from the UI and adds it to the deletion list without sending a deletion request to the backend ( As alternative - images pending deletion are visually distunguished from images that are not marked for deletion)
• The user can click an undo button for any images in the deletion list before saving
• On clicking Save Edits, a deletion request is sent that remove all images in the deletion list from the database (storage)
• If the user Cancels edits or navigates away without saving, the deletion list is cleared and no images are deleted from storage - on returning, all images should be visible and intact
• If a failure occures during the deletion, we should display an concise error messge and retain the images in the deletion list until the user successfully saves or cancels their edits