Merge remote-tracking branch 'origin/master' into codex/web-queue-actions

# Conflicts:
#	apps/web/tsconfig.json
#	docs/architecture.i18n.yaml
#	docs/event-producer-consumer.md
#	packages/client/runtime/README.i18n.yaml
#	packages/client/tsdown.client.ts
#	packages/client/ui-conversation/README.i18n.yaml
#	packages/core/agent-loop/README.i18n.yaml
#	packages/core/agent/README.i18n.yaml
#	packages/core/agent/README.zh.md
#	packages/host/apiproxy/README.i18n.yaml
#	tsconfig.host.json

packages/host/apiproxy/src/api/sessions.ts

@@ -215,6 +215,16 @@ export interface SessionsApi {
   }>):
   Promise<RpcResponse<{ selected: ModelTarget }>>
 
+  /**
+   * Renames a session: appends a `session/title` event with the `user`
+   * source, which pins the title against automatic regeneration. The
+   * normalized accepted title and the title event's seq return so the caller
+   * can settle its projection cell without waiting for the push frame. A
+   * title that normalizes to empty fails with `title-invalid`.
+   */
+  rename(request: RpcRequest<{ sessionId: SessionId; title: string }>):
+  Promise<RpcResponse<{ title: string; seq: number }>>
+
   /**
    * Sends a message. content is core's ContentBlock[] verbatim; mode maps 1:1 — queue→send, steer→steer.
    * A prompt whose content is exactly one text block starting with '/' is a slash command: the host