Oi: block until agent idle, print response to stdout

scripts/Oi

@@ -78,5 +78,7 @@ fi
 # Send prompt to Navigator
 printf '%b' "$context\n\nAcknowledge context. What are we working on?" | try tee "$NAV_PATH/prompt" >/dev/null
 
-# Print session ID so ollie-acme can open it
-printf '%s\n' "$NAV_NAME"
+# Wait for agent to finish, then print response
+offset=$(cat "$NAV_PATH/offset")
+while [ "$(cat "$NAV_PATH/statewait")" != "idle" ]; do :; done
+tail -c +$((offset + 1)) "$NAV_PATH/chat"