Implement RecentlyOnScope domain digest

dashboard/src/docs/domains.md

@@ -62,6 +62,18 @@ One card per domain showing:
 
 ---
 
+## RecentlyOnScope
+
+The `Domains / RecentlyOnScope` page generates deterministic Markdown digests
+for a selected domain. The range parameter defaults to `1h` and accepts compact
+durations such as `15m`, `6h`, or `1d`.
+
+Generated reports are written under the configured State Hub report directory,
+defaulting to `reports/recently-on-scope/<domain_slug>/`. The dashboard lists
+those Markdown files and previews the raw report content.
+
+---
+
 ## Managing domains
 
 Via MCP: