chore: drop the unrendered demo cards and fold the release notes back into one

Author: kathiekiwi

.server-changes/dashboard-agent-failed-turn-stays-in-history.md

@@ -9,4 +9,6 @@ Meet the dashboard agent: a chat in every environment that answers questions abo
 
 **Watch…** on a run, queue, error or the health report tells you when things change: a run finishes, a queue clears or grows past a number you pick, an error comes back, an environment recovers. The answer arrives in the chat and, if you want, by email, Slack or webhook — and the agent can look into bad news on its own.
 
+The health report reads the same everywhere — dashboard, terminal, editor: same sections, same wording, and a marker instead of colour where colour isn't available. If a message to the agent fails, the chat says so and keeps saying so when you reopen it.
+
 Separately: a queue's wait times, peak depth, throughput and throttling can now be read from the API, and the Docs button has been removed from page headers.

.server-changes/dashboard-agent.md

@@ -6,11 +6,9 @@ import {
 import { Button } from "~/components/primitives/Buttons";
 import { cn } from "~/utils/cn";
 import { AgentStatusIcon } from "../../agent-badges";
-import { ChatNote, ChatStatusLine } from "../../chat-layout";
+import { ChatStatusLine } from "../../chat-layout";
 import type { DemoIntent } from "../fixtures/intents";
 
-export const DemoNote = ChatNote;
-
 export function DemoIntentBubble({
   intent,
   onIntercept,