Render images in prompt preview

[JamesPHoughton]

Currently, images do not resolve in the prompt preview.

For example, the following prompt contains two images:

---
name: projects/exaptation/revision_202508/instructions.md
type: noResponse
---

# The game you are about to play has two stages:

## Stage 1: Discussion and Labeling (Video Call) 👤👤👤

Your group will see a set of 2-8 images, like the ones blurred below.

Together, come up with **unique** labels for each image and enter them into the shared text box.  
**You must fill out a label for every image in each round.**

![labeling_demo](projects/exaptation/revision_202508/instructions_demo_labeling.jpg)

💡 Make your labels short, memorable, and _distinct_ from one another — you’ll need to recall them exactly later.

⚠️ **Please don’t take screenshots.** This is a memory game designed to be fun — using screenshots takes away the challenge.

## Stage 2: Recall (On Your Own) 👤

After your group discussion, you’ll see the images again, one at a time.

⚠️ You **won't see numbers on the images** during the recall stage

Type the label your group agreed on for each image.

![recall_demo](projects/exaptation/revision_202508/instructions_demo_recall.jpg)

- If **everyone** enters the correct label, your group earns **10 points**.
- If **anyone** gets it wrong, no points are awarded.

## You will play **four** rounds of labeling and recall, with different images in each round.

- **Round 1:** Training round, broken into 3 chunks. You have 2 minutes to discuss each chunk, followed by recall tasks
- **Round 2:** 8 images, 3 minutes for discussion
- **Round 3:** 8 images, 2 minutes for discussion
- **Round 4:** 8 images, 2 minutes for discussion

You **may reuse labels across rounds**, but **not within the same round**.

---

However, they are rendered only as image placeholder icons.