docs: mark review followups covered

docs/plans/todos.md

@@ -21,7 +21,7 @@
 - EventAgent tool loading and UI management is covered by todo 10.
 - Prompt/pre-message editing, parameter controls, and reusable prompt sets are covered by todos 3 and 11.
 - Chat-window token, cached-token, TTFT, elapsed-time, and per-round stats are covered by todo 12.
-- Review follow-up found remaining gaps in real queue boundaries, API validation, packaging, and tool error isolation.
+- Review follow-up gaps in real queue boundaries, API validation, packaging, and tool error isolation are covered by todos 13-16.
 
 ## Todos