Issue with image sorting order: Display latest generated images first

### What problem are you experiencing?

Current Behavior :
The images within a execution group (history sidebar) are displayed in chronological order. This means the very first image generated in a workflow appears at the top/front, while the most recent one is at the bottom/end.
Expected Behavior :
The images within a group should be displayed in reverse-chronological order (Latest first). The last image generated in the workflow should be the one displayed at the front/top of the group.
Reason:
This matches the behavior of the previous UI and follows the user's intuition: the most recent output is usually the most important and should be visible without extra scrolling or clicking.
Suggested Fix :
Please provide an option to reverse the sorting order in the history sidebar, or restore the "Latest First" default behavior.

### When does this problem occur?

### How often do you encounter this problem?

Multiple times per day

### How much does this problem affect your workflow?

Blocks me from completing tasks

### Current workarounds

_No response_

### Ideas for solutions (Optional)

_No response_

### Additional context

_No response_

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-9080-Issue-with-image-sorting-order-Display-latest-generated-images-first-30f6d73d365081979a11ce5bd62f88ea) by [Unito](https://www.unito.io)