Fixes#387: seeks issued from the official Qobuz mobile app while qbz
acts as the active renderer were silently dropped — audio kept playing
from the original position while the controller's progress bar locked.
Two independent gates were swallowing the command between the
WebSocket and the audio thread; either alone is enough to break the
flow, so both move together.
1. Upstream filter (crates/qconnect-app/src/app.rs)
The is_echo guard treated every SET_STATE with playing_state=None
AND current_track=None as a pure server echo and skipped emitting
RendererCommandApplied. iOS sends a real seek as exactly that
shape (only current_position_ms set, the rest unchanged), so the
command never reached the bridge handler.
Add current_position_ms.is_none() to the guard. Pure echoes still
match (server echoes carry only next_track); position-only seeks
pass through.
2. Downstream gate (src-tauri/src/qconnect/corebridge.rs)
The seek branch was conditioned on peer_renderer_active — i.e. it
only acted when qbz was the controller observing a peer renderer,
never when qbz was the renderer itself. Removed; the existing
is_echo_reset and abs_diff > 2 checks already filter the redundant-
seek case the gate was originally added to defend against (147bcbd7).
Drop the now-unused is_peer_renderer_active import.
Verified manually: seeks from iPhone (renderer_id=3) targeting qbz
(renderer_id=2) at ~1/4 and ~5/6 of a 150s track now translate to
local audio jumps to the correct positions.
cc
vicrodh
6afbc94171