docs(prd): explain superseded dashboard designs

docs/prds/0019-active-agents-in-dashboard.md

@@ -4,6 +4,11 @@
 - **Author:** didericis
 - **Created:** 2026-05-26
 
+> **Superseded.** PRD 0049 removed the active-agents pane and agent-scoped
+> operator edit verbs when the dashboard was narrowed back to a proposal-only
+> supervise TUI. A future agent-management surface was deferred rather than
+> carried forward from this design. The design below is retained as history.
+
 ## Summary
 
 The dashboard today is proposal-centric: it lists every pending

docs/prds/0020-start-and-attach-from-dashboard.md

@@ -4,6 +4,11 @@
 - **Author:** didericis
 - **Created:** 2026-05-26
 
+> **Superseded.** PRD 0049 removed start, re-attach, and stop actions from the
+> dashboard when it became the proposal-only supervise TUI. Bottle lifecycle
+> remains in the dedicated CLI commands; no dashboard replacement from this
+> design remains active. The design below is retained as history.
+
 ## Summary
 
 Today the dashboard is read-only: it surfaces pending proposals

docs/prds/0021-dashboard-tmux-split-pane.md

@@ -4,6 +4,11 @@
 - **Author:** didericis
 - **Created:** 2026-05-26
 
+> **Superseded.** PRD 0049 removed agent handoff and tmux pane management when
+> the dashboard was reduced to the proposal-only supervise TUI. The split-pane
+> interaction described below has no active replacement and is retained only
+> as design history.
+
 ## Summary
 
 When the dashboard runs inside tmux, lay it out as the **left