add Screenshots page with gallery

Home.md

@@ -11,6 +11,7 @@ This wiki is the developer-facing architecture and process reference for cAIc.
 
 - Architecture and components: [Developer Architecture](Developer-Architecture)
 - Active implementation backlog: [Current WiP](Current-WiP)
+- [Screenshots](Screenshots) — gallery of the UI in action
 
 ## Scope and Support Model
 

Screenshots.md

@@ -0,0 +1,6 @@
+# Screenshots
+
+<div style="display: flex; overflow-x: auto; gap: 12px; padding: 8px 0;">
+  <a href="assets/screenshot-jul13.png"><img src="assets/screenshot-jul13.png" height="240"></a>
+  <a href="assets/banner.png"><img src="assets/banner.png" height="240"></a>
+</div>