docs(readme): add v0.1.3 Image-component showcase

Embed warning-image.png + source asset (what-did-you-do-claude.jpg) and a short note about base64 data URLs (WKWebView blocks file:// from agent:// pages).

Author: giannimassive

README.md

@@ -172,6 +172,26 @@ Priority dropdown, complexity radio, and notes in one native form. Agent gets st
 </tr>
 </table>
 
+### Image + structured form (v0.1.3)
+
+Embed a local image (data URL, no `file://` cross-origin issues) alongside RadioGroup, Checkbox, TextInput, and Buttons in one window. Useful when the agent needs to show context — a screenshot, a diagram, a meme — before asking a structured question.
+
+<p align="center">
+  <img src="media/warning-image.png" alt="Destructive action approval window with embedded image, radio group, checkbox, text input, and buttons" width="320">
+</p>
+
+<details>
+<summary><b>Embedding a local image</b></summary>
+
+WKWebView blocks `file://` from an `agent://` page (cross-origin). Pass images as data URLs:
+
+```bash
+B64=$(base64 < my-image.jpg | tr -d '\n')
+# emit `{"Image":{"src":"data:image/jpeg;base64,$B64", ...}}` in your A2UI JSONL
+```
+
+</details>
+
 <details>
 <summary><b>What the raw A2UI JSONL looks like</b> (click to expand — the skill writes this for you)</summary>