docs: close mvp evolution todos

docs/plans/todos.md

@@ -14,6 +14,15 @@
 - MVP committed at `6babafa` with FastAPI, WebSocket, static UI, OpenAI-compatible streaming, EventAgent handoff, provider-compatibility guards, and tests.
 - Post-MVP work now evolves toward the original queue/event-driven debugging-console requirements.
 
+## Coverage Review
+
+- OpenAI Chat Completions compatible streaming and provider payload guards are covered by todos 2, 5, and 7.
+- Queue/event-driven ChatAgent and EventAgent handoff is covered by todo 9.
+- 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.
+- No pending todos remain for the original MVP evolution scope.
+
 ## Todos
 
 | ID | Status | Plan | Goal | Verification |