Multiple browser tabs open to the same server could see workstream
names, states, and content mixed up between workstreams when creating,
closing, and switching tabs rapidly.
Root causes and fixes:
- Global SSE ws_created events were never handled — other tabs never
learned about new workstreams, causing blank names and stale tab bars
- SSE reconnection assigned all stale panes to the first workstream
instead of deduplicating; now uses two-pass assignment with tracking
- switchTab left the old EventSource open while reassigning pane.wsId,
creating a window for events to leak; now disconnects SSE first
- Per-workstream events carried no ws_id — server now stamps ws_id on
all events via _enqueue (shallow copy); client handleEvent drops
events with mismatched ws_id as defense-in-depth
- Plan dialog used pane.wsId at resolve time (could drift after tab
switch); now captures ws_id when the dialog opens
- Global ws_closed could reassign panes before per-ws SSE finished
draining; now disconnects per-ws SSE immediately on close
Patrick Buckley
d7cea053b6