A plugin.reload no longer freezes the panel during Vegas: the old instance is torn down and the new one loaded off the render thread (frame gap 3017 ms -> 9 ms in the ledpi reproduction). A failed or timed-out teardown stops the reload with a restart hint instead of loading over stale modules or tearing down an instance still in use.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Control socket stage 2: the render thread wakes for queued commands (static screens ~1 ms, Vegas within one frame), brightness.set, and plugin.reload after a store update, with mailbox/restart fallbacks. Rig checks listed in the PR body are still to run.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The display serves a control socket (/run/ledmatrix/control.sock) carrying versioned JSON commands, one per line, each answered. Stage 1 covers on-demand start, stop and status; commands are queued on the socket thread and applied on the render thread through the mailbox's own handler, and the web interface falls back to the file mailbox when the socket is unavailable. Protocol and security model: docs/IPC_CONTROL_SOCKET.md.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
