0d3cfb5f86
Issue 1 - Volume/mute changes from external apps (browser YT player, pulsemixer) not reflected in the frontend: - on_node_param and on_node_info updated node state but never called notifyChanged(), so the SSE broadcast was never triggered for external changes. - Add engine_ref back-pointer to Object (set in create_proxy_for_object). - Call notifyChanged() at the end of on_node_info and after updating Props in on_node_param, so any external volume/mute change immediately broadcasts. Issue 2 - Volume slider has no audible effect on browser/app streams: - setNodeVolume only set SPA_PROP_volume (single float). Browser streams (Chromium, Firefox) use SPA_PROP_channelVolumes (per-channel float array) and ignore the single-float property. - Now set both SPA_PROP_volume AND SPA_PROP_channelVolumes (using the node's known channel count, defaulting to stereo if unknown). ALSA hardware nodes respond to SPA_PROP_volume; app streams respond to SPA_PROP_channelVolumes. Note: wires auto-reconnecting is WirePlumber session policy (by design) — WirePlumber re-links any stream that loses its connection to the default sink. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>