docs: note the pane.Window unification (#8)

Author: kinncj

CHANGELOG.md

@@ -7,6 +7,13 @@ and the project follows [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 
+### Changed
+- **The dashboard modals and detail view now scroll through the shared `pane.Window`**,
+  and the dashboard's duplicate `scrollWindow`/`keepSelVisible` are gone — one windowing
+  implementation for the whole TUI, so the modals show the same `▲/▼ more · y/total`
+  affordance as the top view. The pane's unused `Filterable`/`Sortable` API was dropped;
+  the dashboard keeps its own filter/sort idiom. No user-facing change (closes #8).
+
 ## [2.7.1] - 2026-07-03
 
 ### Fixed