Method addStreamsToChannel

frontend/src/api.js:753–782

* PATCHes the channel with the * combined stream list and updates the channelsTable store in-place * using the stream objects the caller already has. Skips requeryStreams * (stream data doesn't change) and requeryChannels (we build the * result locally). * * @param {number} channel

(channelId, existingStreams, newStreams)

   * @param {Array} newStreams      - stream objects to append
   */
  static async addStreamsToChannel(channelId, existingStreams, newStreams) {
    try {
      const existing = existingStreams || [];
      // Deduplicate by ID, preserving order (existing first, new appended)
      const seen = new Set(existing.map((s) => s.id));
      const merged = [...existing];
      for (const s of newStreams) {
        if (!seen.has(s.id)) {
          seen.add(s.id);
          merged.push(s);
        }
      }

      await request(`${host}/api/channels/channels/${channelId}/`, {
        method: 'PATCH',
        body: { id: channelId, streams: merged.map((s) => s.id) },
      });

      // Update the channelsTable store in-place with the merged streams
      const store = useChannelsTableStore.getState();
      const channel = store.channels.find((c) => c.id === channelId);
      if (channel) {
        store.updateChannel({ ...channel, streams: merged });
      }
    } catch (e) {
      errorNotification('Failed to add streams to channel', e);
      // On failure, requery to restore correct state
      await API.requeryChannels();
    }
  }

  static async updateChannels(ids, values) {
    const body = [];