📛 feat: Chat Badges via Model Specs (#10272)

* refactor: remove `useChatContext` from `useSelectMention`, explicitly pass `conversation` object

* feat: ephemeral agents via model specs

* refactor: Sync Jotai state with ephemeral agent state, also when Ephemeral Agent has no MCP servers selected

* refactor: move `useUpdateEphemeralAgent` to store and clean up imports

* refactor: reorder imports and invalidate queries for mcpConnectionStatus in event handler

* refactor: replace useApplyModelSpecEffects with useApplyModelSpecAgents and update event handlers to use new agent template logic

* ci: update useMCPSelect test to verify mcpValues sync with empty ephemeralAgent.mcp

client/src/store/agents.ts

@@ -16,6 +16,18 @@ export const ephemeralAgentByConvoId = atomFamily<TEphemeralAgent | null, string
   ] as const,
 });
 
+export function useUpdateEphemeralAgent() {
+  const updateEphemeralAgent = useRecoilCallback(
+    ({ set }) =>
+      (convoId: string, agent: TEphemeralAgent | null) => {
+        set(ephemeralAgentByConvoId(convoId), agent);
+      },
+    [],
+  );
+
+  return updateEphemeralAgent;
+}
+
 /**
  * Creates a callback function to apply the ephemeral agent state
  * from the "new" conversation template to a specified conversation ID.