Fix joining active inference

internal/service/static/js/api.js

@@ -165,9 +165,10 @@ export class Api {
    * message_deleted per manifest ID that is no longer saved. An
    * empty manifest requests every saved row.
    *
-   * When an inference is reserved or ongoing, the stream then follows
-   * its events and ends with done. When none is, the stream ends
-   * after the diff without done.
+   * If an inference run is reserved or in progress, the stream sends one
+   * inference_active event, then the live events of the run, and then done.
+   * If no run is active, the stream closes after the diff and does not send
+   * inference_active or done.
    *
    * @param {string} id - conversation ID.
    * @param {Array<{id: string, updated_at: string}>} manifest
@@ -345,7 +346,10 @@ export class Api {
       body,
       signal,
     });
-    yield* readEvents(res);
+    for await (const event of readEvents(res)) {
+      if (signal?.aborted) return;
+      yield event;
+    }
   }
 }