Add per-rig watch::Sender<RigState> map to FrontendRuntimeContext,
populated by refresh_remote_snapshot for every rig returned by GetRigs.
The SSE /events endpoint now subscribes to the session's rig-specific
watch channel instead of the single global one, allowing different
browser tabs to independently view different rigs. The JS frontend
reconnects SSE on rig switch to pick up the new channel.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
sjg
f78097b0ed
